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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 6690. Отображено 100.
16-02-2012 дата публикации

Apparatus And Method For Sensorless Identification Of Rotating Electrical Equivalent Circuit Parameters Of A Three-Phase Asynchronous Motor

Номер: US20120038303A1
Автор: Heiko Zatocil, Sebastian Villwock
Принадлежит: BAUMUELLER NUERNBERG GMBH

Identification of electrical equivalent circuit parameters ( 15 ) of a three-phase asynchronous motor ( 09 ) without a shaft encoder. The method comprises—Assumption of a standstill position of the rotor ( 11 );—Equidirectional test signal infeed U 1α , U 1β in α and β in the stator axis direction of the asynchronous motor ( 09 );—Measuring of a measuring signal I 1α , I 1β of the α and β axial direction of the asynchronous motor ( 09 ); and—Identification of equivalent circuit parameters of the asynchronous motor ( 09 ) on the basis of the test signal voltages U 1α , U 1β and of the measuring signal currents I 1α , I 1β ; whereby the test signal feed allows the rotor ( 11 ) to remain torque-free. Determination of equivalent circuit parameters ( 15 ) of an asynchronous motor ( 09 ) as well relates to a motor control device ( 35 ), whereby the identified equivalent circuit parameters ( 15 ) can be used for the determination, optimization and monitoring of a motor control and for control of electrical drives.

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Номер записи: 1
29-03-2012 дата публикации

Methods and Apparatuses for Fault Management in Permanent Magnet Synchronous Machines Using the Field Reconstruction Method

Номер: US20120074879A1
Автор: Amir Khoobroo, Babak Fahimi
Принадлежит: University of Texas System

Methods and apparatuses for detecting faults and optimizing phase currents in an electromechanical energy converter are disclosed. An example method comprises: measuring a current of a phase of the electromechanical energy converter, modeling the electromechanical energy converter with the current measurement input into a field reconstruction module, calculating a flux linkage of the electromechanical energy converter, comparing the flux linkage with a flux linkage from a no fault electromechanical energy converter, and optimizing the current of the phase of the electromechanical energy converter in response to the comparison. Other embodiments are described and claimed.

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Номер записи: 2
21-06-2012 дата публикации

Systems, Methods, and Devices for Demodulating Induction Motor Instantaneous Rotor Slot Harmonic Frequency

Номер: US20120153935A1
Автор: Benoit Leprettre, Larry A. Turner, Roy S. Colby, Zhi Gao
Принадлежит: Schneider Electric USA Inc

A method and apparatus to dynamically and adaptively demodulate induction motor instantaneous rotor slot harmonic frequency for line-connected squirrel-cage polyphase induction motors. The instantaneous rotor slot harmonic frequency carries essential information on the instantaneous rotor speed. Based on a correlation between the motor's input power and its rotor slot harmonic frequency, a dynamically varying carrier frequency is computed and used in a rotor slot harmonic frequency detector. The rotor slot harmonic frequency detector is based on a superheterodyne principle. It contains a generalized linear-phase low-pass filter, whose bandwidth is estimated dynamically by a filter bandwidth estimator. The rotor slot harmonic frequency detector also includes a latency compensator, which receives the dynamically varying carrier frequency signal and synchronizes it with the output of a frequency demodulator.

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Номер записи: 3
23-08-2012 дата публикации

Method and system for controlling an electric motor with compensation for time delay in position determination

Номер: US20120212162A1
Автор: Long Wu, Robert Shaw, Srujan Kusumba
Принадлежит: Deere and Co

A sensor detects position data for a rotor of the motor at a first time. A data processor receives the detected position data associated with a first time delay. A sensing circuit senses an analog current at the motor during a second time delay. An analog-to-digital converter converts the analog current to a digital current data during a third time delay. The fourth time delay is detected between actual current reading instant and position reading instant in a data processor. The digital phase current data is transformed into measured direct and quadrature axes control current data based on synchronization or temporal alignment of the position data with the actual measured analog phase current at the starting time by compensating the position data by a sum of the second time delay, the third time delay and the fourth time delay, where the first time delay is subtracted from the sum.

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Номер записи: 4
13-09-2012 дата публикации

Motor control system for a hoist drive

Номер: US20120229062A1
Автор: Janne Salomäki, Mikko Porma
Принадлежит: KONECRANES PLC

A motor control system for a hoist drive having an electric motor operationally connected to a hoisting member for hoisting a load, the motor control system being adapted to generate a final angular frequency reference (ω* s ) for control of the electric motor, the motor control system comprising a power limiter means adapted to generate a correction term (ω s,cor ) for angular frequency reference. The power limiter means comprises an integrating controller means, the power limiter means being adapted to generate the correction term (ω s,cor ) for angular frequency reference using output signal I P of the integrating controller means, initial data of the integrating controller means including information relating to actual value of the power of the electric motor and a power related limit value of the electric motor.

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Номер записи: 5
29-11-2012 дата публикации

Electric motor and method for controlling the same

Номер: US20120299521A1
Автор: Anders Erestam, Ulf Petersson
Принадлежит: HUSQVARNA AB

An electric motor ( 100 ) having a motor control system ( 400 ) including:—a current measuring means ( 402 ) for directly or indirectly measuring the electric current in the rotor windings ( 7 ) providing a rotor current value/s,—an ambient temperature measuring/estimation means ( 404 ) for measuring or estimating the ambient air temperature providing an air temperature value/s,—a rotor temperature estimation means ( 406, 407, 408, 409, 410, 411 ) for estimating a rotor temperature at least based on the rotor current value/s and the air temperature value/s, and—a current limiting means ( 405 ) for preventing overheating/burning of the rotor assembly ( 3 ) by limiting the electric current to the rotor windings ( 7 ) when the estimated rotor temperature exceeds a predetermined overheating threshold ( 412 ).

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Номер записи: 6
27-12-2012 дата публикации

Rotor temperature estimation for an electric vehicle

Номер: US20120330483A1
Автор: Bon Ho Bae, Mengwei Campbell
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

In accordance with exemplary embodiments, rotor temperature estimation is provided for estimating rotor temperatures of an electric motor in an electric vehicle. A method comprises estimating a rotor temperature in a controller for an electric motor of a vehicle using a fast-mode rotor temperature estimator for a time interval, and then deactivating the fast-mode rotor temperate estimator after the time interval and activating a normal-mode rotor temperature estimator in the controller for the electric motor of the vehicle. A system comprises an electric motor, a resistance rotor temperature estimator including a limit value limiting a temperature estimate increase for temperature estimates, and a controller for the electric motor, which uses the temperature estimate and is configured to temporarily increase the limit value of the resistance rotor temperature estimator providing a fast-mode rotor temperature estimate.

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Номер записи: 7
04-07-2013 дата публикации

Apparatus for controlling interior permanent magnet synchronous motor

Номер: US20130169203A1
Автор: Kyung Joo LEE
Принадлежит: LSIS Co Ltd

Disclosed is an apparatus for controlling an IPMSM, the apparatus according to exemplary embodiments of the present disclosure including a first generating unit generating a q-axis reference voltage of a synchronous reference frame from a reference frequency, a current converter generating a current of the synchronous reference frame from a 3-phase current of the IPMSM, and a voltage controller generating a d-axis reference voltage compensating a voltage in response to a load change.

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Номер записи: 8
11-07-2013 дата публикации

Method for estimating a torque of a three-phase drive motor for a vehicle

Номер: US20130175965A1
Автор: Enrico Fuchs, Hans-Georg Kopken, Stefan Volkel, Steffen Hellmich, Thomas Götze
Принадлежит: SIEMENS AG

A method for estimating a torque of a three-phase motor for a vehicle includes measuring a respective current strength in at least two of three phase lines, wherein the three-phase motor is supplied with power by a converter, and wherein the three phase lines lead from the converter to the three-phase motor of the vehicle, measuring a respective voltage at each of the three phase lines, determining a rotating field frequency as a function of the measured current strengths or the measured voltages; and determining an estimated value for the torque as a function of the measured current strengths, the measured voltages and the determined rotating field frequency.

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Номер записи: 9
25-07-2013 дата публикации

POWER SOURCE APPARATUS

Номер: US20130187575A1
Автор: NAKANO Shinya, Yugou Masaki
Принадлежит:

The power source apparatus is provided with a shunt resistor connected in series with batteries, and a current computation circuit that detects the voltage induced by current flow through the shunt resistor to compute battery current. The shunt resistor is provided with a pair of current flow terminals at two separated points on a metal plate connected in series with the batteries via connecting leads, and a pair of voltage detection terminals on a side of the metal plate between the pair of current flow terminals. Further, the shunt resistor has interval adjustment structures to adjust the distance (L) between attachment points where the connecting leads attach to the pair of current flow terminals. The distance (L) between lead attachment points is adjusted with the interval adjustment structures to finely adjust the voltage induced at the voltage detection terminals due to current flow between the two attachment points. 16-. (canceled)7. A power source apparatus comprising:batteries that can be charged;a shunt resistor connected in series with the batteries that can be charged; anda current computation circuit that detects the voltage induced by current flow through the shunt resistor and computes a battery current through the batteries,wherein the shunt resistor is provided with a pair of current flow terminals at two points on a metal plate that are separated and connected in series with the batteries via connecting leads, and a pair of voltage detection terminals on a side of the metal plate between the pair of current flow terminals where a voltage is induced proportional to the current flow, andwherein the shunt resistor has interval adjustment structures to adjust the distance between attachment points where the connecting leads attach to the pair of current flow terminals, and the distance between the attachment points where the pair of connecting leads attach is adjusted with the interval adjustment structures to finely adjust the voltage induced at the ...

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Номер записи: 10
15-08-2013 дата публикации

Method and Device for Regulating Separately Excited Synchronous Machines

Номер: US20130207589A1
Автор: Jaszczak Krzysztof, Margner Moritz, Mill Oliver
Принадлежит:

A regulating method and device for loss-optimized operation of a separately excited synchronous machine having a stator and a rotor are provided. The method may include: providing reference values for stator and rotor currents, wherein the reference value for the stator current and/or the reference value for the rotor current or an auxiliary parameter representing the reference value of the stator current and/or an auxiliary parameter representing the reference value of the rotor current is dependent on a predefined reference torque; providing maximum values for stator and rotor currents; comparing reference values for the stator and/or rotor currents or an auxiliary parameter representing the reference value of the stator current and/or an auxiliary parameter representing a reference value of the rotor current to the corresponding maximum values and reducing of the reference torque by a torque value if at least one reference value reaches or exceeds the corresponding maximum value. 1. A regulation method for a separately excited synchronous machine having a stator and a rotor , the regulation method comprising:providing reference values for stator and rotor currents, wherein at least one of the reference value for the stator current, the reference value for the rotor current, an auxiliary variable representing the reference value for the stator current, and an auxiliary variable representing the reference value for the rotor current is dependent on a predetermined reference torque,providing maximum values for stator and rotator currents,comparing at least one of the reference values with a corresponding one of the maximum values, andreducing the reference torque by a torque value in response to the at least one reference values reaching or exceeding the corresponding maximum value.2. The regulation method of claim 1 , wherein the reference values are stored in a lookup table claim 1 , and wherein the reference values each correspond to a minimum-losses operating ...

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Номер записи: 11
22-08-2013 дата публикации

AC MOTOR CONTROL APPARATUS

Номер: US20130214709A1
Автор: Itoch Takeshi, KAKO Hirofumi, OMATA Ryuji
Принадлежит: Denso Corporation

A motor control circuit calculates an α-axis current iα and a β-axis current iβ in a fixed coordinate system based on a W-phase (sensor phase) of an AC motor. The control circuit calculates the α-axis current iα from a current iw.sns sensed in the W-phase, and the β-axis current iβ from a differentiated value Δiα determined from the variation quantity of the α-axis current based on that the α-axis current iα and the β-axis current iβ are in a relation of a sine wave and a cosine wave. Subsequently, the control circuit calculates a current phase xθ=tan(iβ/iα) relative to the W-phase. Subsequently, the control circuit calculates an estimation factor according to the current phase xθ and determines an estimated current iu.est in the U-phase of the AC motor by multiplying the sensed current iw.sns by the calculated estimation factor. 1. An AC motor control apparatus for a system , which includes a three-phase AC motor having a first phase , a second phase and a third phase , an inverter for driving the AC motor and a current sensor for sensing a current flowing in the first phase , the AC motor control apparatus comprising:a controlling part for controlling electric power supply to the AC motor, the controlling part including a current estimating part configured to calculate a current phase relative to the first phase from an α-axis current and a β-axis current in a fixed coordinate system set with an α-axis and a β-axis, the α-axis extending in a same direction as an axis of the first phase extends, the β-axis being perpendicular to the axis of the first phase, and calculating an estimated current in at least the second phase from the current phase relative to the first phase and the sensed current in the first phase,wherein the current estimating part is configured to calculate the α-axis current from the sensed current in the first phase and calculate the β-axis current from a differentiated value of the α-axis current.2. The AC motor control apparatus according to ...

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Номер записи: 12
22-08-2013 дата публикации

AC MOTOR CONTROL APPARATUS

Номер: US20130214711A1
Автор: ITOH Takeshi, KAKO Hirofumi, OMATA Ryuji
Принадлежит: Denso Corporation

A motor control circuit calculates, based on a sensed current of a sensor phase sensed by a current sensor, an estimated current of the other phase and calculates a d-axis and a q-axis estimated currents based on the sensed current of the sensor phase and the estimated current of the other phase. The motor control circuit further calculates a d-axis and a q-axis command voltages based on the estimated currents thereby to control power supply to the AC motor. When the sensed current of the sensor phase is 0 [A], the command voltages are fixed and the estimated current is interpolated. Thus, variations of the command voltages caused by an error in the estimated current are reduced and a rapid change in the estimated current is reduced. 1. An AC motor control apparatus for a system , which includes a three-phase AC motor having a first phase , a second phase and a third phase , and a current sensor for sensing a current flowing in the first phase , the AC motor control apparatus comprising:a current estimating part configured to calculate an estimated current of at least the second phase based on a sensed current of the first phase and electrical angle of the AC motor and calculate a d-axis estimated current and a q-axis estimated current in a rotating coordinate system of the AC motor based on the sensed current of the first phase and the estimated current of at least the second phase; anda controlling part configured to control electric power supply to the AC motor by using the d-axis estimated current and the q-axis estimated current,wherein the current estimating part includes an interpolation part configured to interpolate the estimated current of at least the second phase by fixing a command related to a voltage of the AC motor at a zero-crossing time of the sensed current of the first phase, the zero-crossing time including a case in which the current detection value of the first phase is 0 or in a predetermined range including 0.2. The AC motor control ...

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Номер записи: 13
22-08-2013 дата публикации

AC MOTOR CONTROL APPARATUS

Номер: US20130214712A1
Автор: ITOH Takeshi, KAKO Hirofumi, OMATA Ryuji
Принадлежит: Denso Corporation

A reference current phase sensing part of a sensor phase (W) calculates an α-axis current iα and a β-axis current iβ in a fixed coordinate system formed with respect to a sensor phase as a base. The α-axis current iα is calculated based on a sensed current iw.sns of the sensor phase and a β-axis current iβ is calculated based on command currents iu* and iv* of the other two phases (U, V) determined from a d-axis command current id* and a q-axis command current iq*. Then a current phase xθ=tan(iβ/iα) is calculated. A basic wave estimating part calculates an estimated current iu.est of the other phase by calculating an estimation coefficient corresponding to the reference current phase xθ of the sensor phase and multiplying the sensed current iw.sns of the sensor phase by the estimation coefficient.

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Номер записи: 14
03-10-2013 дата публикации

MOTOR CONTROL DEVICE

Номер: US20130257324A1
Автор: MAEKAWA Sari
Принадлежит: KABUSHIKI KAISHA TOSHIBA

A motor control device includes a torque computing section which computes an output torque of an electric motor which is capable of generating magnetic torque by permanent magnets and reluctance torque, a flux weakening angle computing section which determines an angle of a flux weakening current vector that is added to a reference current vector so that a command torque value and the computed torque value correspond with each other, a voltage acquiring section which acquires a terminal voltage of the motor, a flux weakening amplitude computing section which determines an amplitude of the flux weakening current vector so that the terminal voltage of the motor is not more than a maximum voltage applicable to the motor, and a command current computing section which computes a command current vector by adding the flux weakening current vector to the reference current vector. 1. A motor control device comprising:a torque computing section which computes an output torque of an electric motor which is capable of generating magnetic torque by permanent magnets and reluctance torque;a flux weakening angle computing section which determines an angle of a flux weakening current vector that is added to a reference current vector so that a command torque value and the computed output torque value correspond with each other;a voltage acquiring section which acquires a terminal voltage of the motor;a flux weakening amplitude computing section which determines an amplitude of the flux weakening current vector so that the terminal voltage of the motor is not more than a maximum voltage applicable to the motor; anda command current computing section which computes a command current vector by adding the flux weakening current vector to the reference current vector.2. The device according to claim 1 , wherein the flux weakening angle computing section subtracts from an angle of the reference current vector a correction angle according to a torque difference obtained by subtracting the ...

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Номер записи: 15
10-10-2013 дата публикации

Control electronics for brushless motors

Номер: US20130264977A1
Автор: Aidong Xu, David Bonner
Принадлежит: Thor Power Corporation

An electronic control circuit for a brushless motor has an input power circuit providing a DC voltage and a microcontroller integrated circuit receiving the DC voltage. The microcontroller integrated circuit provides three-phase control signals according to a space vector control method. A microprocessor connected to the microcontroller integrated circuit executes supervisory control over the electronic control circuit. An inverter circuit receives the three-phase control signals from the microcontroller integrated circuit and provides driving signals to the brushless motor based on the three-phase control signals received from the microcontroller integrated circuit.

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Номер записи: 16
10-10-2013 дата публикации

SERVO MOTOR CONTROL DEVICE FOR CONTROLLING SERVO MOTOR CONFIGURED TO DRIVE FEED AXIS OF MACHINE TOOL

Номер: US20130264988A1
Автор: IKAI Satoshi, IWASHITA Yasusuke
Принадлежит: FANUC Corporation

An arithmetic coefficient setting unit sets a feedback control arithmetic coefficient to a value between a first feedback control arithmetic coefficient value for a cutting-feed and a second feedback control arithmetic coefficient value for a rapid-traverse operation smaller than the first feedback control arithmetic coefficient value. An arithmetic coefficient change unit continuously changes the feedback control arithmetic coefficient from the second feedback control arithmetic coefficient value to the first feedback control arithmetic coefficient value over a first period between a first time, which is an arbitrary time during the rapid-traverse operation, and the second time after the first time or a second period between a third time after the first time and before the second time, and the second time if it is predicted at the first time that the operating command switches from the rapid-traverse operation command to the cutting-feed command at the second time. 1. A servo motor control device for carrying out feedback control to a servo motor configured to drive a feed axis of a machine tool in order to carry out: a cutting-feed to move the feed axis of the machine tool while cutting a workpiece if an operating command in a machining program to machine the workpiece using the machine tool is a cutting-feed command; and a rapid-traverse operation to move the feed axis of the machine tool without cutting a workpiece if the operating command in the machining program to machine the workpiece using the machine tool is a rapid-traverse operation command , comprising:an arithmetic coefficient setting unit configured to set a feedback control arithmetic coefficient to a value between a first feedback control arithmetic coefficient value for the cutting-feed and a second feedback control arithmetic coefficient value for the rapid-traverse operation smaller than the first feedback control arithmetic coefficient value;an arithmetic coefficient change unit configured to ...

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Номер записи: 17
24-10-2013 дата публикации

AC MOTOR CONTROL APPARATUS

Номер: US20130278184A1
Автор: ITOH Takeshi, KAKO Hirofumi, Suzuki Takashi
Принадлежит: Denso Corporation

A control apparatus of an AC motor improves an electric current estimation accuracy of the AC motor. The control apparatus includes an electric current estimation unit that repeatedly performs an inverted dq conversion, a dq conversion, and a correction process. Based on a d/q axis electric current estimate values of a previous cycle, the inverted dq conversion calculates an electric current estimate value of a sensor phase. The dq conversion calculates a d/q axis electric current correction values based on an electric current estimation error of the sensor phase, which is derived from the electric current estimate value and the electric current detection value detected by an electric current detector. The correction process calculates the d/q axis electric current estimate values of a current cycle by correcting the d/q axis electric current estimate values of the previous cycle by using the d/q axis electric current correction values. 1. A control apparatus of an alternate current AC motor , which includes a three-phase AC motor and an electric current detector for detecting an electric current , as an electric current detection value , in a sensor phase , which is one of three phases of the three-phase AC motor , the control apparatus comprising:an electric current estimation unit repeatedly performing, at a predetermined interval, an inverted dq conversion, a dq conversion, and a correction process, the electric current estimation unit determining a d/q axis electric current estimate values in a rotation coordinate system of the AC motor, whereinthe inverted dq conversion calculates an electric current estimate value of the sensor phase based on the d/q axis electric current estimate value of a previous cycle,the dq conversion calculates a d/q axis electric current correction values based on an electric current estimation error of the sensor phase, which is derived from the electric current estimate value of the sensor phase calculated by the inverted dq ...

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Номер записи: 18
24-10-2013 дата публикации

AC MOTOR CONTROL APPARATUS

Номер: US20130278185A1
Автор: ITOH Takeshi, KAKO Hirofumi, Suzuki Takashi
Принадлежит: Denso Corporation

A control apparatus for an AC motor includes a current sensor and an estimation section. The current sensor detects current flowing through one phase of the motor. The estimation section repeats an estimation process. In the estimation process, d-axis and q-axis current estimation values are calculated based on the presently detected current of the one phase and a previous current estimation value of another phase of the motor, and a present current estimation value of each phase is calculated based on smoothed values of the d-axis and q-axis current estimation values. The estimation section performs the estimation process based on a phase lag element. The phase lag element is a difference between the presently detected current and a previous current estimation value of the one phase or the previously detected current. 1. A control apparatus for controlling a three-phase AC motor , the control apparatus comprising:a current sensor configured to detect electric current flowing through one phase of the AC motor, the one phase being defined as a sensor phase; anda current estimation section configured to repeatedly perform a current estimation process in a predetermined cycle, whereinin the current estimation process, a d-axis current estimation value and a q-axis current estimation value in a rotating coordinate system of the AC motor are calculated based on a present current detection value of the sensor phase and a previous current estimation value of another phase of the AC motor, the present current detection value being defined as the current presently detected by the current sensor,in the current estimation process, a present current estimation value of each of the sensor phase and the other phase of the AC motor is calculated based on a smoothed d-axis current estimation value and a smoothed q-axis current estimation value into which the d-axis current estimation value and the q-axis current estimation value are respectively smoothed,the current estimation ...

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Номер записи: 19
24-10-2013 дата публикации

AC MOTOR CONTROL APPARATUS

Номер: US20130278186A1
Автор: ITOH Takeshi, KAKO Hirofumi, Suzuki Takashi
Принадлежит: Denso Corporation

A control apparatus for a three-phase AC motor includes a current sensor and a current estimation section. The current sensor detects current flowing through one phase of the motor. The current estimation section repeats dq transformation and inverse dq transformation in a predetermined cycle. In the dq transformation, a d-axis current estimation value and a q-axis current estimation value in a rotating coordinate system of the AC motor are calculated based on the detected current and a previous current estimation value of another phase of the AC motor. In the inverse dq transformation, a present current estimation value of the other phase to be obtained at a time of angle advance of one period of the cycle is calculated based on smoothed values of the d-axis current estimation value and the q-axis current estimation value. 1. A control apparatus for controlling a three-phase AC motor , the control apparatus comprisinga current sensor configured to detect electric current flowing through one phase of the AC motor, the one phase being defined as a sensor phase; anda current estimation section configured to repeatedly perform both dq transformation and inverse dq transformation in a predetermined calculation cycle, whereinin the dq transformation, a d-axis current estimation value and a q-axis current estimation value in a rotating coordinate system of the AC motor are calculated based on the current detected by the current sensor and a previous current estimation value of another phase of the AC motor, andin the inverse dq transformation, a present current estimation value of the other phase to be obtained at a time of angle advance of one period of the calculation cycle is calculated based on a smoothed d-axis current estimation value and a smoothed q-axis current estimation value into which the d-axis current estimation value and the q-axis current estimation value are respectively smoothed.2. The control apparatus according to claim 1 , whereinthe current ...

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Номер записи: 20
24-10-2013 дата публикации

AC MOTOR CONTROL APPARATUS

Номер: US20130278187A1
Автор: ITOH Takeshi, KAKO Hirofumi, Suzuki Takashi
Принадлежит: Denso Corporation

A control apparatus includes an electric current estimation unit to improve a responsiveness of an AC motor. The electric current estimation unit performs, at predetermined intervals, a dq conversion, a correction process, and an inverted dq conversion. The dq conversion calculates d/q axis electric current estimate values based on a detection value of a sensor phase from a sensor, and on an electric current estimate values of two phases of the AC motor other than the sensor phase from a previous cycle. The correction process corrects, during the dq conversion, the d/q axis electric current estimate values in an orthogonal direction that is orthogonal to a sensor phase axis. The inverted dq conversion calculates the electric current estimate values of the two phases other than the sensor phase based on the d/q axis electric current estimate values corrected by the correction process and smoothed by a low-pass filter process. 1. A control apparatus of an alternate current (AC) motor , which includes a three-phase AC motor and an electric current detector for detecting an electric current , as an electric current detection value , in a sensor phase , which is one phase of the three-phase AC motor , the control apparatus comprising:an electric current estimation unit performing an electric current estimation process by calculating a d/q axis electric current estimate values in a rotation coordinate system of the AC motor and calculating an electric current estimate values of each phase of the AC motor, whereinthe d/q axis electric current estimate values are based on the electric current detection value of the sensor phase detected by the electric current detector and on the electric current estimate values of phases other than the sensor phase from a previous cycle,the electric current estimate values of each phase of the AC motor are based on smoothed values derived from smoothing the d/q axis electric current estimate values, andduring the calculation of the d/q ...

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Номер записи: 21
24-10-2013 дата публикации

AC MOTOR CONTROL APPARATUS

Номер: US20130278188A1
Автор: ITOH Takeshi, KAKO Hirofumi, Suzuki Takashi
Принадлежит: Denso Corporation

A control apparatus of an AC motor improves an electric current estimation accuracy of the AC motor, which includes a three phase motor with an electric current detector to detect an electric current detection value of one of the three phases (a sensor phase). The control apparatus includes an electric current estimation unit that repeatedly performs an inverted dq conversion and a dq conversion. The inverted dq conversion calculates an electric current estimate values for phases other than the sensor phase based on the d/q axis electric current estimate values of a previous cycle. The dq conversion calculates the d/q axis electric current estimate values of a current cycle in a rotation coordinate system of the AC motor based on the electric current estimate values calculated by the inverted dq conversion and the electric current detection value of the sensor phase detected by the electric current detector. 1. A control apparatus of an alternate current AC motor , which includes a three-phase AC motor and an electric current detector for detecting an electric current , as an electric current detection value , of a sensor phase , which is one of three phases of the three-phase AC motor , the control apparatus comprising:an electric current estimation unit repeatedly performing at predetermined intervals an inverted dq conversion and a dq conversion for determining a d/q axis electric current estimate values in a rotation coordinate system of the AC motor, whereinthe inverted dq conversion calculates an electric current estimate values for phases other than the sensor phase based on the d/q axis electric current estimate values of a previous cycle in the rotation coordinate system of the AC motor, andthe dq conversion calculates the d/q axis electric current estimate values of a current cycle based on the electric current estimate values for the phases other than the sensor phase calculated by the inverted dq conversion and the electric current detection value of the ...

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Номер записи: 22
19-12-2013 дата публикации

VARIABLE-FLUX MOTOR DRIVE SYSTEM

Номер: US20130334991A1
Автор: Mochikawa Hiroshi, SAKAI Kazuto, YUUKI Kazuaki
Принадлежит: KABUSHIKI KAISHA TOSHIBA

A variable-flux motor drive system including a permanent-magnet motor including a permanent magnet, an inverter to drive the permanent-magnet motor, and a magnetize device to pass a magnetizing current for controlling flux of the permanent magnet. The permanent magnet is a variable magnet whose flux density is variable depending on a magnetizing current from the inverter. The magnetize device passes a magnetizing current that is over a magnetization saturation zone of magnetic material of the variable magnet. This system improves a flux repeatability of the variable magnet and a torque accuracy. 1. (canceled)2. A motor drive system comprising:an inverter for driving the motor;a motor having a permanent magnet, a flux of the permanent magnet is varied based on a magnetizing current output from the inverter; anda current controller configured to control the magnetizing current, and, when a condition to vary the flux of the permanent magnet is satisfied, the current controller is further configured toestimate a flux amount of the motor based on a voltage and current supplied to the motor and an inductance value of a coil, andcalculate a current reference, based on a torque instruction and the estimated flux amount of the motor, to be used for controlling the magnetizing current.3. The motor drive system according to claim 2 , wherein the current reference includes a D-axis current reference and a Q-axis current reference.4. The motor drive system according to claim 3 , wherein the current controller is further configured tooutput a flux command based on run state information and inverter frequency information,calculate a D-axis current command difference based on the flux command, the D-axis current reference, and the estimated flux amount of the motor, andmodify the D-axis current reference based on the D-axis current command reference.5. The motor drive system according to claim 4 , wherein the current controller outputs a zero value as the D-axis current reference ...

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Номер записи: 23
19-12-2013 дата публикации

CONTROL METHOD IMPLEMENTED IN A POWER CONVERTER AND INTENDED FOR IDENTIFYING PARAMETERS LINKED TO THE MAGNETIC SATURATION OF AN ELECTRIC MOTOR

Номер: US20130334992A1
Автор: Jebai Al Kassem, MALRAIT François, Martin Philippe, Rouchon Pierre
Принадлежит: Schneider Toshiba Inverter Europe SAS

A control method implemented in a power converter including an inverter connected to a synchronous electric motor including permanent magnets, the electric motor being modeled in the power converter by a mathematical model of currents in the electric motor expressing a flux current and a torque current on the basis of magnetic-saturation parameters. The control method identifies magnetic-saturation parameters during a learning procedure including applying a static voltage signal and a high-frequency voltage signal along an axis of the flux and/or an axis of the torque of the motor to cause an oscillation of the current on the axis of the flux and/or on the axis of the torque. 110-. (canceled)11. A control method implemented in a power converter comprising an inverter connected to a permanent magnet synchronous electric motor comprising a rotor and a stator , the electric motor being modeled in the power converter by a mathematical model of currents of the electric motor expressing a flux current and a torque current as a function of magnetic saturation parameters , representative of mutual magnetic saturation between the rotor and the stator of the electric motor and of intrinsic magnetic saturation of the rotor and of the stator , the control method comprising:application to the electric motor of a voltage sequence comprising a steady-state voltage signal and a high-frequency voltage signal along an axis of the flux and/or an axis of torque of the motor, resulting in an oscillation of current on the axis of the flux and/or on the axis of the torque;measurement of the oscillation of the current obtained on the axis of the flux and/or on the axis of the torque;determination of the magnetic saturation parameters as a function of the oscillation of the current.12. The method as claimed in claim 11 , wherein the determination of the magnetic saturation parameters comprises extraction of amplitude of the oscillation of the current obtained.13. The method as claimed in ...

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Номер записи: 24
27-02-2014 дата публикации

MOTOR DRIVING SYSTEM

Номер: US20140055067A1
Автор: Kuroda Takeshi, Toba Akio
Принадлежит:

A motor driving system is disclosed having a control device A for controlling a synchronous motor , the control device A comprising a sensorless control algorithm device that includes an abnormality determining device for determining abnormality of the algorithm based on a magnetic pole position error estimated value of the motor . When the abnormality determining device has determined abnormality of the algorithm, the control device A controls a power converter using a magnetic pole position detected value detected by a magnetic pole position detector attached to the motor, in place of using a magnetic pole position estimated value. This motor driving system can guarantee reliability of the sensorless control algorithm device while assuring safety. Safety of electric vehicles is enhanced by installing the motor driving system that has been guaranteed reliable. 1. A motor driving system for controlling a synchronous motor , the motor driving system comprising:a DC power supply;a power converter converting a DC power from the DC power supply into an AC power through and delivering the AC power to the motor;a control device for controlling the power converter;a sensorless control algorithm device that generates a magnetic pole position estimated value of the motor;a first abnormality determining means that determines abnormality in the sensorless control algorithm device;a magnetic pole position detecting means attached to the motor;wherein, in a normal state of the sensorless control algorithm device, the control device controls the power converter using the magnetic pole position estimated value, andwhen the first abnormality determining means determines abnormality in the sensorless control algorithm device, the control device controls the power converter using the magnetic pole position detected value in place of using the magnetic pole position estimated value.2. The motor driving system according to claim 1 , wherein the first abnormality determining means ...

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Номер записи: 25
13-03-2014 дата публикации

ELECTRIC MACHINE TORQUE CAPABILITY DETERMINATION

Номер: US20140070741A1
Автор: Luedtke Daniel
Принадлежит: FORD GLOBAL TECHNOLOGIES, LLC

A vehicle comprises an electric machine configured with at least one controller issuing torque commands with the use of a voltage bus. The controller may be configured to respond to a torque requests based on multiple vehicle system inputs including vehicle speed, position of the accelerator pedal and brake pedal, and various other vehicle data. The controller may respond to a torque request that exceeds a threshold value by issuing torque commands for the electric machine based on a speed of the electric machine and a voltage on the bus. Based on the speed of the electric machine and voltage on the bus, the controller may issue a constant torque output by the electric machine as the speed and voltage vary. Calculating a ratio using speed of the electric machine to voltage on the bus to determine torque capability may result as a constant torque when the ratio is constant. 1. A vehicle comprising:an electric machine;a bus; andat least one controller configured to, in response to torque requests that exceed a threshold value, issue torque commands for the electric machine based on a speed of the electric machine and a voltage on the bus such that a torque output by the electric machine remains generally constant as the speed and voltage vary with a constant ratio of the speed to voltage.2. The vehicle of wherein the at least one controller includes a variable voltage controller programmed to adjust the voltage on the bus.3. The vehicle of wherein the threshold value is approximately equal to a maximum torque capability of the electric machine.4. The vehicle of wherein the threshold value is based on the speed of the electric machine and the voltage on the bus.5. The vehicle of wherein the electric machine is a synchronous motor.6. The vehicle of wherein the controller comprises a vehicle system controller claim 1 , an engine controller claim 1 , a variable voltage controller and a motor controller.7. A vehicle comprising:an electric machine having windings;a bus; ...

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Номер записи: 26
01-01-2015 дата публикации

Controlled Resonance in Electrical Power Devices

Номер: US20150002068A1
Автор: Durham Ormonde G., Lakata Edward E.
Принадлежит:

Systems for controlled resonance in electrical power devices are described. A programmed signal processor generates output control signals from input electrical signals based on resonant control parameters for a target power device. Analog electrical control systems for controlled resonance, power devices incorporating controlled resonance, and opto-programmed controllers for use in controlled resonance applications are described, with example embodiments for electro-mechanical systems with resonant constructive power drive action for electric motors. 1. An analog electrical control system , comprising:a programmed signal processor for generating an output control signal from at least one input electrical signal, wherein the output control signal is generated from the at least one input electrical signal by the programmed signal processor to include a plurality of resonant control parameters for a target power device receiving the output control signal.2. The analog electrical control system of claim 1 , wherein the programmed signal processor injects periodic voltage pulses into the output control signal inducing a collapsing field in the target power device for each of the plurality of resonant control parameters to achieve and maintain resonance of the output control signal and operation of the target power device.3. The analog electrical control system of claim 1 , wherein the programmed signal processor is an opto-processor executing an opto-program including a plurality of multi-dimensional profiles and at least one graphic pulsed resonance feature within the plurality of multi-dimensional parameter profiles to generate the plurality of resonant control parameters for the target power device.4. The analog electrical control system of claim 3 , wherein the plurality of multi-dimensional parameter profiles includes at least 3 dimensions.5. The analog electrical control system of claim 3 , wherein the plurality of multi-dimensional parameter profiles includes ...

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Номер записи: 27
05-01-2017 дата публикации

Rotating electric machine control device

Номер: US20170001661A1
Автор: Kouichi Nakamura
Принадлежит: Denso Corp

A rotating electric machine control device includes a first system controller and a second system controller, an overheat protection controller and an abnormality detector. The overheat protection controller includes a temperature estimator and a restricted current calculator. The temperature estimator estimates system temperatures as well as other temperature, including a shared component temperature of a shared component that is connected to both of plural systems in a shared manner. The restricted current calculator calculates restricted current values, based on the system temperatures and the shared component temperature. At least one of the system temperatures, the shared component temperature, and/or the restricted current values is changed from an all-systems normal time, when at least one of a plurality of systems is abnormal.

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Номер записи: 28
06-01-2022 дата публикации

SYSTEMS AND METHODS OF DISTRIBUTED AND DYNAMICALLY CONFIGURABLE MOTOR CONTROL

Номер: US20220006407A1
Автор: CARSON Gerald B., Edwards Benjamin W., FILIPPENKO Konstantin A., JEFFERIES Kevin M., PILLOT Christian
Принадлежит: Schneider Electric USA, Inc.

Techniques for managing a distributed control system for a motor control switch are described. A request to implement a first controller for a motor control switch is received. Embodiments determine a plurality of functional modules for the first controller. Each of the plurality of functional modules comprises an instance of computer logic configured to perform a respective function. A respective Motor Control Function Set (MCFS) for performing the respective function of each of the plurality of functional modules is determined. One or more of a plurality of configurable hardware blocks are allocated to each of the plurality of functional modules. Embodiments configure each of the plurality of configurable hardware blocks based on the MCFS of the functional module to which the respective configurable hardware block is allocated. The configured plurality of configurable hardware blocks is executed as a distributed system to control the motor control switch. 1. A method , comprising:receiving a request to implement a first controller for a motor control switch;determining a plurality of functional modules for the first controller, wherein each of the plurality of functional modules comprises an instance of computer logic configured to perform a respective function;determining a respective Motor Control Function Set (MCFS) for performing the respective function of each of the plurality of functional modules;identifying a plurality of configurable hardware blocks that are available for implementing the first controller;allocating one or more of the plurality of configurable hardware blocks to each of the plurality of functional modules, wherein at least two of the plurality of configurable hardware blocks are allocated to a first one of the plurality of functional modules;configuring each of the plurality of configurable hardware blocks based on the MCFS of the functional module to which the respective configurable hardware block is allocated; andexecuting the ...

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Номер записи: 29
05-01-2017 дата публикации

INTRA-STROKE CYCLE TIMING FOR PUMPJACK FLUID PUMPING

Номер: US20170002635A1
Автор: II Victor, Sauers, Williams Bertrand Jeffery
Принадлежит:

A pumpjack is operated continuously over a sequence of two adjacent pump stroke cycles, by energizing an electric motor to operate the pumpjack over a first pump stroke cycle according to a motor speed profile over a plurality of discrete control periods within the cycle, while receiving sensory feedback from one or more sensors. In response to the feedback, and while continuing to operate the pumpjack, one or more speed adjustments are made to specific control periods, so as to alter the motor speed profile while continuing to operate the electric motor to drive the pump jack. The intra-cycle control optimizes flow while reacting to detrimental and changing conditions. 1. A method of operating a pumpjack continuously over a sequence of two adjacent pump stroke cycles , the method comprising:energizing an electric motor to operate the pumpjack over a first of the two pump stroke cycles, according to a first motor speed profile comprising a plurality of target motor speeds corresponding to each of a plurality of discrete control periods within the first pump stroke cycle;receiving sensory feedback during the first pump stroke cycle from one or more sensors mounted to monitor at least one operating condition of the pumpjack, the sensory feedback comprising data collected during operation of the motor according to the first motor speed profile;in response to receiving the sensory feedback, and while continuing to operate the pumpjack, determining one or more speed adjustment values corresponding to a limited subset of the plurality of discrete control periods;altering the first motor speed profile based on the one or more adjustment values to provide a second motor speed profile; andoperating the electric motor over the second of the two pump stroke cycles, according to the second motor speed profile.2. The method of claim 1 , wherein the first motor speed profile comprises a predetermined default setting.3. The method of claim 1 , wherein the first motor speed profile ...

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Номер записи: 30
04-01-2018 дата публикации

SYSTEM AND METHOD FOR OPTIMIZING FLUX REGULATION IN ELECTRIC MOTORS

Номер: US20180006591A1
Автор: Sheahan Thomas J.
Принадлежит: NIDEC MOTOR CORPORATION

A system and method for dynamically optimizing flux levels in electric motors based on estimated torque. Motor parameters and motor equations are used to estimate operating characteristics and to set current and voltage limits which define an optimal flux operating range for a given speed and torque of the motor. A slope of a linear flux gain is determined within the defined operating range at different speeds of the motor. The determined slopes for the different speeds are saved in a memory element. A control element determines and achieves an optimal flux level for the motor by accessing the table to identify a specific slope which corresponds to an actual speed of the motor, multiplying the slope by the estimated torque and adding an offset value to determine a phase current component value associated with the optimal flux level, and applying the determined phase current component value to the motor. 1. An electric motor system for optimizing a flux level in an electric motor configured to receive an input power and to drive a load , the electric motor system comprising:an electric motor having a shaft and configured to create a torque on the shaft to drive the load; and [ using a set of motor parameters and a set of motor equations to estimate a slip, a stator frequency, and a torque, and defining an optimal flux operating range for a given speed and torque of the electric motor,', 'determining a linear flux gain within the optimal flux operating range at a plurality of different speeds of the electric motor, and', 'saving in the electronic memory element the linear flux gain for each different speed, and, 'an electronic memory element containing a table of linear flux gains for a plurality of different speeds, wherein the table is created by—'}, accessing the memory element to identify a specific linear flux gain which corresponds to an actual speed of the electric motor,', 'multiplying the specific linear flux gain by the estimated torque and adding an offset ...

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Номер записи: 31
02-01-2020 дата публикации

MOTOR CONTROLLING METHOD, MOTOR CONTROLLING SYSTEM, AND ELECTRONIC POWER STEERING SYSTEM

Номер: US20200007059A1
Автор: GHADERI Ahmad
Принадлежит:

A motor controlling method includes a step of obtaining an armature magnetic flux, a resultant magnetic flux, a stator current, and a stator voltage, which are represented by a phasor, with respect to an α-β fixed coordinate system or a d-q rotating coordinate system, a step of calculating an angle (ϕ) between the stator current and the stator voltage, a step of calculating a torque angle (δ) according to: 17-. (canceled)8. A motor controlling method of controlling a surface permanent magnet motor , the motor controlling method comprising the step of:acquiring an armature magnetic flux, a resultant magnetic flux, a stator current, and a stator voltage, which are represented by a phasor, with respect to an α-β fixed coordinate system or a d-q rotating coordinate system;calculating an angle (ϕ) between the stator current and the stator voltage; {'br': None, 'sup': '−1', 'sub': s', 'a', 'a, 'δ=90−tan[(ψ−ψsin(ϕ))/(ψcos(ϕ))],'}, 'calculating a torque angle (δ) according to{'sub': a', 's, 'where ψindicates a magnitude of the armature magnetic flux and ψindicates a magnitude of the resultant magnetic flux; and'}controlling the surface permanent magnet motor based on the torque angle (δ).9. A motor controlling method of controlling a surface permanent magnet motor , the motor controlling method comprising the step of:acquiring a resultant magnetic flux, a stator current, and a stator voltage, which are represented by a phasor, with respect to an α-β fixed coordinate system or a d-q rotating coordinate system;calculating an angle (ϕ) between the stator current and the stator voltage; {'br': None, 'sup': '−1', 'i': LI', '−LI, 'sub': s', 's', 's, 'δ=tan[(cos(ϕ))/(ψsin(ϕ))],'}, 'calculating a torque angle (δ) according to{'sub': s', 's, 'where L is an armature inductance, ψindicates a magnitude of the resultant magnetic flux, and Iindicates a magnitude of the stator current; and'}controlling the surface permanent magnet motor based on the torque angle (δ).10. The motor ...

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Номер записи: 32
14-01-2016 дата публикации

MOTOR DRIVING CONTROL APPARATUS AND METHOD, AND MOTOR SYSTEM USING THE SAME

Номер: US20160013747A1
Автор: Gu Bon Young
Принадлежит:

The motor driving control apparatus may include: a speed-position detecting unit detecting an angular velocity and a magnetic flux angle of a rotor of a motor apparatus using currents flowing in a plurality of phases of the motor apparatus; a magnetic flux angle correcting unit determining a reference magnetic flux angle using the magnetic flux angle and outputting the reference magnetic flux angle when an error is present in the magnetic flux angle; and a controlling unit controlling driving of the motor apparatus using the angular velocity and the magnetic flux angle. 1. A motor driving control apparatus comprising:a speed-position detecting unit detecting an angular velocity and a magnetic flux angle of a rotor of a motor apparatus using currents flowing in a plurality of phases of the motor apparatus;a magnetic flux angle correcting unit determining a reference magnetic flux angle using the magnetic flux angle and outputting the reference magnetic flux angle when an error is present in the magnetic flux angle; anda controlling unit controlling driving of the motor apparatus using the angular velocity and the magnetic flux angle.2. The motor driving control apparatus of claim 1 , wherein the magnetic flux angle correcting unit judges that an error is present in the magnetic flux angle when the magnetic flux angle does not have linearity.3. The motor driving control apparatus of claim 1 , wherein the magnetic flux angle correcting unit determines that the magnetic flux angle is the reference magnetic flux angle when the magnetic flux angle has linearity.4. The motor driving control apparatus of claim 3 , wherein the magnetic flux angle correcting unit confirms a first value of 0 degree and a second value of 360 degrees of the magnetic flux angle when the magnetic flux angle does not have linearity claim 3 , and determines that a saw-tooth wave having the first value as a minimum value and having the second value as a maximum value is the reference magnetic flux ...

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Номер записи: 33
11-01-2018 дата публикации

CONTROL APPARATUS FOR ROTARY ELECTRIC MACHINE

Номер: US20180013369A1
Автор: Fujii Kiyoshi
Принадлежит: Denso Corporation

In a control apparatus for a rotary electric machine, a first manipulation unit manipulates, as control for a predetermined first region with respect to the controlled variable, a voltage phase of a voltage vector applied to an armature winding while controlling a field current to cause a deviation between an amplitude of an induced voltage and an amplitude of a predetermined voltage to be equal to or smaller than a predetermined value, the induced voltage being generated in the armature winding based on rotation of the rotor, the predetermined voltage being applied to the armature winding; A second manipulation unit that manipulates, as control for a second region that is larger than the first region, the field current such that the controlled variable is controlled to the target value. 1. A control apparatus applied to a rotary electric machine comprising a rotor having a field winding through which a field current flows , and a stator having an armature winding through which an armature current flows , the control apparatus having , as a controlled variable , torque of the rotary electric machine or a parameter that has a positive correlation with the torque , the control apparatus comprising:a first manipulation means that manipulates, as control for a predetermined first region with respect to the controlled variable, a voltage phase of a voltage vector applied to the armature winding while controlling the field current to cause a deviation between an amplitude of an induced voltage and an amplitude of a predetermined voltage to be equal to or smaller than a predetermined value, the induced voltage being generated in the armature winding based on rotation of the rotor, the predetermined voltage being applied to the armature winding; anda second manipulation means that manipulates, as control for a second region that is larger than the first region, the field current such that the controlled variable is controlled to the target value.2. The control apparatus ...

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Номер записи: 34
10-01-2019 дата публикации

CURRENT SENSING BASED COMMUTATION CONTROL

Номер: US20190013757A1
Автор: LEMAN Dirk, Zuo Xing
Принадлежит:

A method for controlling a single coil brushless DC motor, the method comprising at least a first EHP sequence which comprises: driving the motor using a driving signal during a torque generating period, to accelerate the motor, such that during a subsequent generator mode period a phase current goes in generator mode; driving the motor during the generator mode period using a generator mode signal, which allows the phase current to be in generator mode; monitoring the phase current during the generator mode period thereby obtaining phase current information; and determining parameters of a next EHP sequence based on the obtained phase current information. 1. A method for controlling a single coil brushless DC motor , the method comprising at least a first EHP sequence which comprises:driving the motor using a driving signal during a torque generating period, to accelerate the motor, such that during a subsequent generator mode period a phase current goes in generator mode,driving the motor during the generator mode period using a generator mode signal, which allows the phase current to be in generator mode,monitoring the phase current during the generator mode period thereby obtaining phase current information,and determining parameters of a next EHP sequence based on the obtained phase current information.2. A method according to wherein part of the obtained phase current information is timing information comprising a first zero crossing moment of the phase current and/or a second zero crossing moment of the phase current and/or a zero crossing moment of a time derivative of the phase current in between the first and the second zero crossing moment of the phase current.3. A method according to wherein the determining step comprises determining a rising edge and/or a falling edge of a driving signal of the next EHP sequence based on the obtained phase current information.4. A method according to wherein the determining step comprises determining a rising edge and/ ...

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Номер записи: 35
14-01-2021 дата публикации

MODELING METHOD OF STATOR WINDING AIR GAP FOR TEMPERATURE FIELD ANALYSIS OF AC TRACTION MOTOR

Номер: US20210013820A1
Автор: KUANG Sijian, Liu Ping, Zhang Xiaoping, Zhang Zhu
Принадлежит:

A modeling method of a stator winding air gap for temperature field analysis of an AC traction motor includes: changing the width of an air gap of a stator winding equivalent model according to a set value of spacing; establishing a three-dimensional finite element model of the AC traction motor with the stator winding air gap; based on the three-dimensional finite element model of different widths of the air gap, analyzing a temperature field to obtain a temperature field distribution diagram of the AC traction motor; carrying out the numerical fitting according to data in the temperature distribution diagram to obtain a function relation between the air-gap width and the temperature of the stator winding equivalent model; and by measuring the actual temperature of a motor stator winding, calculating an optimal air-gap width corresponding to the modeling of the stator winding of the current AC traction motor. 1. A modeling method of a stator winding air gap for temperature field analysis of an AC traction motor , comprising the following steps:{'b': '1', 'step ): establishing a stator winding equivalent model according to the structure of a stator winding of the AC traction motor;'}{'b': 2', '1, 'step ): based on the stator winding equivalent model obtained in the step , determining the structure and the width of an isolation layer between the model and a slot wall and a slot wedge of a stator iron core;'}{'b': 3', '2, 'step ): determining the structure and the initial width of a corresponding insulation layer and the air gap in the isolation layer according to the structure and the width of the isolation layer obtained in the step , and based on the structural parameters of other components of the motor, establishing a three-dimensional finite element model of the AC traction motor;'}{'b': 4', '3, 'step ): carrying out the temperature field analysis based on the three-dimensional finite element model of the AC traction motor obtained in step to obtain a ...

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Номер записи: 36
21-01-2021 дата публикации

Motor selection device and motor selection method

Номер: US20210018883A1
Автор: Hidetoshi Uematsu, Kodai Akashi
Принадлежит: FANUC Corp

A motor selection device is equipped with a speed calculation unit that calculates a motor selection speed from a speed waveform of a motor that drives a predetermined driven object, in consideration of iron loss generated in a target motor serving as an object to be selected, the speed waveform being obtained when the driven object is made to perform a prescribed operation, a storage unit that stores a motor characteristic corresponding to a speed of the target motor serving as the object to be selected, and a determination unit that determines whether or not the prescribed operation by the target motor is possible, using the motor characteristic corresponding to the motor selection speed.

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Номер записи: 37
22-01-2015 дата публикации

METHOD FOR OPERATING AN ELECTRICAL MACHINE

Номер: US20150022132A1
Автор: Strack Sebastian
Принадлежит:

A method for operating an electrical machine having a stator with a coil from electrical conductors, which has two coil ends lying opposite each other. The method includes simultaneously recording vibration measurements by means of which the elliptic vibration modes of the two coil ends can be determined as a factor of time; determining the ellipse inclinations and the phase positions of elliptic vibration modes of the two coil ends determining critical operating states of the electrical machine, in which the elliptic inclinations and the phase positions of the elliptic vibration modes of the two coil ends are substantially identical; and operating the electrical machine in such a manner that the critical operating states can be avoided by varying the idle power of the electrical machine. 1. A method for operating an electrical machine which comprises a stator having a coil of electrical conductors , the coil comprising two coil ends that lie opposite one another on the coil;the method comprising the steps:simultaneously determining vibration measurement values with which it is possible to determine elliptic vibration modes of the two coil ends in dependence upon time;also determining ellipse inclinations and phase positions of the elliptic vibration modes of the two coil ends;also determining critical operating states of the electrical machine at which the elliptic inclinations and the phase positions of the elliptic vibration modes of the two coil ends are essentially identical; andthen operating the electrical machine in such that the critical operating states are avoided by varying idle power of the electrical machine so that the ellipse inclinations and the phase positions of the elliptic vibration modes of the two coil ends are not essentially identical.2. The method as claimed in claim 1 , further comprising determining the vibration measurement values of the coil ends at at least eight and at a maximum twelve measuring points that are uniformly distributed ...

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Номер записи: 38
17-01-2019 дата публикации

MOTOR OPERATING SYSTEMS AND METHODS THEREOF

Номер: US20190020296A1
Автор: CHENG Liao-Shun, LEE Wen-Jan
Принадлежит:

A motor operating system includes a parameter-setting module and a control circuit. The parameter-setting module generates a first parameter-setting corresponding to a first operating stage through a user interface, and determines whether a first operating status conforms to a first threshold setting. The control circuit is coupled to a motor, receives the first parameter-setting corresponding to the first operating status, drives the motor according to a first driving signal corresponding to the first parameter-setting, and outputs the first operating status corresponding to the first driving signal. When the first operating status does not conform the first threshold setting, the parameter-setting module generates an adjusted first parameter-setting. When the first operating status conforms the first threshold setting, the parameter-setting module sets the first parameter-setting as a first optimal parameter-setting. 1. A motor operating method , comprising:generating, via a processor of an electronic device, a first parameter-setting corresponding to a first operating stage through a user interface;receiving, via a buffer of a control circuit of the electronic device, the first parameter-setting;reading, via a controller of the control circuit, the first parameter-setting from the buffer, and generating a first driving signal according to the first parameter-setting;driving, via a driver of the control circuit, a motor according to the first driving signal;monitoring, via a monitor of the control circuit, a first operating status of the motor corresponding to the first driving signal, and outputting the first operating status to the processor of the electronic device; anddetermining, via the processor, whether the first operating status corresponding to the first parameter-setting conforms to a first threshold setting storing in a first memory of the electronic device;wherein when the processor determines that the first operating status does not conform to the ...

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Номер записи: 39
16-01-2020 дата публикации

ROTATION ELECTRIC MACHINE CONTROLLER

Номер: US20200021218A1
Автор: OTAKE Hiroyasu
Принадлежит:

A rotation electric machine controller that is applied to a system including a rotation electric machine and a power converter is provided. The rotation electric machine controller includes: a d-axis command value set portion that sets a negative d-axis current command value; and an operation portion that operates the power converter to control a d-axis current to the d-axis current command value. The d-axis command value set portion increases an absolute value of the d-axis current command value in response to that the q-axis parameter is larger than the target value. The d-axis command value set portion decreases the absolute value of the d-axis current command value in response to that the q-axis parameter is less than the target value. 1. A rotation electric machine controller that is applied to a system including a rotation electric machine and a power converter electrically connected to the rotation electric machine , the rotation electric machine controller comprising:a d-axis command value set portion that sets a negative d-axis current command value in accordance with a difference between a q-axis parameter that is a q-axis voltage command value of the rotation electric machine or a correlation value of the q-axis voltage command value, and a target value of the q-axis parameter; andan operation portion that is configured to operate the power converter to control a d-axis current to the d-axis current command value, which is set,wherein:the d-axis command value set portion increases an absolute value of the d-axis current command value in response to that the q-axis parameter is larger than the target value;the d-axis command value set portion decreases the absolute value of the d-axis current command value in response to that the q-axis parameter is less than the target value; andthe d-axis command value set portion sets the d-axis current command value, causing the d-axis current command value to have a higher change rate in a case where the q-axis ...

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Номер записи: 40
16-01-2020 дата публикации

Induction Motor Health Monitoring Method

Номер: US20200021221A1
Автор: Conn Bradley, Polcuch Eric
Принадлежит:

A system and method for determining the health of a motor drive system is provided, where a motor is coupled to a common motor control and a single or plurality of other motors are coupled to the common power source. Current data corresponding to current provided to the motor is obtained via a sensor connected to an electrical input of the motor, and voltage data corresponding to a voltage provided by the common motor control is also obtained. Based on the current data and the voltage data, a motor current provided to the motor and a motor voltage to current phase shift (or power factor) are determined, and the health of the motor drive system is determined from the motor phase shift (or power factor) and the motor current. 1. A system for determining the health of a motor drive system , comprising:a common motor controller;at least one motor electrically coupled to the common motor controller;at least one current sensor operatively coupled to a respective motor of the at least one motor; anda monitor coupled to the at least one current sensor, the monitor configured to:obtain voltage data corresponding to a voltage provided by the common motor controller;obtain from each of the at least one current sensor a motor current for the respective motor;determine, based on the motor current and the voltage data, at least one of a motor phase shift or power factor; anddetermine the health of the motor drive system based on the at least one motor phase shift or power factor and the motor current.2. The system according to claim 1 , where in determining the health of the motor drive system the monitor is configured to:use the motor current and at least one of the motor phase shift or power factor to compare to respective thresholds in a look-up table;identify a motor current entry and at least one of a phase shift or power factor entry which is outside acceptable limits of the thresholds in the look-up table;retrieve a health condition from the look-up table that corresponds ...

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Номер записи: 41
16-01-2020 дата публикации

Motor driving circuit and motor driving method thereof

Номер: US20200021230A1
Автор: Ming-Jung Tsai
Принадлежит: Anpec Electronics Corp

A motor driving circuit according to the present disclosure includes a driving voltage generation circuit, a duty detection circuit, a calibration circuit and a multiplier. The calibration circuit is coupled to the duty detection circuit and the multiplier is coupled to the driving voltage generation circuit and the calibration circuit. A motor driving method according to the present disclosure includes: detecting a duty cycle signal provided by a system terminal through the duty detection circuit; generating an adjustment signal according to the duty cycle signal through the calibration circuit; and multiplying the predetermined driving voltage by the adjustment signal through the multiplier to generate a driving voltage to a motor. The waveform of the coil current of the motor will be a sine wave. The adjustment signal represents a ratio at which the predetermined driving voltage needs to be adjusted under a specific duty of the motor.

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Номер записи: 42
21-01-2021 дата публикации

Motor selection device and motor selection method

Номер: US20210021214A1
Автор: Hidetoshi Uematsu, Kodai Akashi
Принадлежит: FANUC Corp

A motor selection device is equipped with a speed calculation unit that calculates an average speed from a speed waveform of a motor that drives a predetermined driven object, the speed waveform being obtained when the driven object is made to perform a prescribed operation, a current calculation unit that calculates a root mean square current from a current waveform of the motor that drives the driven object, the current waveform being obtained when the driven object is made to perform the prescribed operation, a storage unit that stores a motor characteristic corresponding to a speed of a target motor serving as an object to be selected, and a determination unit that determines whether or not the prescribed operation by the target motor is possible, using the motor characteristic corresponding to the average speed, and the root mean square current.

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Номер записи: 43
21-01-2021 дата публикации

METHOD FOR OPERATING AN ELECTRICALLY COMMUTATED MACHINE

Номер: US20210021222A1
Автор: Denz Dominik, Fricker David, Jerger Armin, Malich Thomas, Mueller Tankred, Rehagen Johannes, Soellner Michael, Vollmer Ulrich
Принадлежит:

A method for operating an electrically commutated machine. In at least one method step, in particular in at least one method step of overmodulation operation of the electrically commutated machine, a precommutation angle of the electrically commutated machine is set depending on an efficiency of the electrically commutated machine. 116. A method for operating an electrically commutated machine , the method comprising , in at least one method step , setting a precommutation angle () of the electrically commutated machine depending on an efficiency of the electrically commutated machine.218. The method according to claim 1 , characterized in that in at least one method step claim 1 , at least one commutation signal () of the electrically commutated machine is overmodulated.31620. A method according to claim 1 , characterized in that in at least one method step claim 1 , the precommutation angle () is set on the basis of at least one continuous current characteristic curve () of the electrically commutated machine.42016. The method according to claim 1 , characterized in that at least one method step involves ascertaining at least one current characteristic curve () of the electrically commutated machine for setting the precommutation angle () at at least one operating temperature of the electrically commutated machine.516. The method according to claim 1 , characterized in that in at least one method step claim 1 , the precommutation angle () is set to a value which achieves a highest efficiency for a given operating state.616. The method according to claim 1 , characterized in that in at least one method step claim 1 , efficiency-dependent setting of the precommutation angle () is deactivated.7222016. The method according to claim 1 , characterized in that at least one method step involves determining a starting point () of a deviation from a current characteristic curve () of the electrically commutated machine for setting the precommutation angle () depending on at ...

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Номер записи: 44
23-01-2020 дата публикации

MOTOR CONTROLLER

Номер: US20200023890A1
Автор: FUJITA Yuji, Kawamura Hiroshi, PALANDRE Xavier Joseph
Принадлежит: JTEKT CORPORATION

Provided is a motor controller in which a total motor torque can be changed at a constant rate if maximum torques that can be generated by winding groups of a plurality of systems lose their balance. An upper limit of a first assist control amount for a first winding group or a second assist control amount for a second winding group may be limited to a value smaller than the original upper limit. In this case, an ECU calculates the first assist control amount and the second assist control amount so that the first assist control amount and the second assist control amount reach their upper limits at the same timing relative to changes in absolute values of steering torques. 1. A motor controller , comprising a control circuit configured to calculate a control amount corresponding to a torque to be generated by a motor including winding groups of a plurality of systems , and independently control , for the respective systems , power supply to the winding groups of the plurality of systems based on individual control amounts obtained by allocating the calculated control amount for the respective systems , whereinthe control circuit is configured to calculate the individual control amounts of the plurality of systems so that the individual control amounts of the plurality of systems reach their upper limits at the same timing relative to a change in the torque to be generated by the motor.2. The motor controller according to claim 1 , wherein the control circuit is configured to:calculate, for the respective systems, maximum torques to be generated in the winding groups of the plurality of systems;calculate, for the respective systems, ratios of the maximum torques to a total torque obtained by summing up the maximum torques; andcalculate the individual control amounts of the respective systems by allocating the control amount at the calculated ratios of the respective systems.3. The motor controller according to claim 2 , wherein the control circuit is configured to ...

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Номер записи: 45
10-02-2022 дата публикации

Motor input signal monitoring and conditioning

Номер: US20220043409A1
Автор: Gray Patrick Troy, JR. Richard Stuart, Morrison Gerald Dale, Seger, Van Ostrand Daniel Keith
Принадлежит: SigmaSense, LLC.

A rotating equipment system with in-line drive-sense circuit (DSC) electric power signal processing includes rotating equipment, in-line drive-sense circuits (DSCs), and one or more processing modules. The in-line DSCs receive input electrical power signals and generate motor drive signals for the rotating equipment. An in-line DSC receives an input electrical power signal, processes it to generate and output a motor drive signal to the rotating equipment via a single line and simultaneously senses the motor drive signal via the single line. Based on the sensing of the motor drive signal via the single line, the in-line DSC provides a digital signal to the one or more processing modules that receive and process the digital signal to determine information regarding one or more operational conditions of the rotating equipment, and based thereon, selectively facilitate one or more adaptation operations on the motor drive signal via the in-line DSC. 1. An electric power signal conditioning and drive-sense circuit (DSC) sensing system , the system comprising:an electric power conditioning module operably coupled to receive an electrical power signal and to generate a conditioned electric power signal, wherein, when enabled, the electric power conditioning module operably coupled and configured to perform one or more adaptation operations on the electrical power signal to generate the conditioned electric power signal based on control signaling provided by one or more processing modules; sense the conditioned electric power signal via a single line;', 'detect an effect on the conditioned electric power signal that is based on the one or more adaptation operations that is performed on the electrical power signal by the electric power conditioning module in accordance with generating the conditioned electric power signal; and', 'generate a digital signal representative of the at least one of the electrical characteristic of the one or more adaptation operations; and, 'a ...

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Номер записи: 46
10-02-2022 дата публикации

METHOD AND SYSTEM FOR MONITORING THE OPERATION OF AT LEAST ONE DRIVE COMPONENT

Номер: US20220043437A1
Автор: Winter Jens
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

The speed and security of the monitoring the operation of a drive component is improved by transferring data relating to the drive component and/or to the operation of the drive component to a central IT infrastructure. Within the central IT infrastructure, the transferred data are associated with a first model of the drive component, and with a second model of at least one virtual component associated with the first model. An operating state of the drive component is determined from a correlation of the first and second models. 124.-. (canceled)25. A method for monitoring an operation of at least one drive component , comprising:transferring data relating to the at least one drive component and/or to an operation of the at least one drive component to a central IT infrastructure,assigning the transferred data within the central IT infrastructure to a first model of the at least one drive component,assigning to the first model a second model of at least one virtual component, with the second model simulating a technical behavior of a component that is electrically or mechanically connected to the at least one drive component, anddetermining an operating state of the at least one drive component from a correlation of the first and second models.26. The method of claim 25 , wherein the data relating to the at least one drive component comprise an individual product identification.27. The method of claim 26 , further comprising automatically assigning the first model based on the individual product identification.28. The method of claim 25 , further comprising determining the operating state of the drive component from at least one characteristic curve.29. The method of claim 25 , further comprising determining at least some of the data relating to the operation of the at least one drive component with at least one sensor.30. The method of claim 29 , wherein the data relating to the operation of the at least one drive component comprise a temperature claim 29 , a ...

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Номер записи: 47
26-01-2017 дата публикации

Adaptive Torque Disturbance Cancellation for Electric Motors

Номер: US20170025979A1
Автор: MAGEE DAVID PATRICK, Tinoco Jorge Zambada, Wilson David L.
Принадлежит:

An adaptive torque disturbance cancellation method and motor control system for rotating a load are described. The system has: (i) a speed controller for receiving a first input signal indicating a desired motor speed and, in response, for outputting a motor control signal; (ii) current sensing circuitry for sensing current through a motor that rotates in response to the speed controller; (iii) circuitry for storing, into a storage device, history data representative of the current through a motor when the motor operates to rotate the load; and (iv) circuitry for modifying the motor control signal in response to the history data. 1. A motor control system for rotating a load , comprising:a speed controller for receiving a first input signal indicating a desired motor speed and, in response, for outputting a motor control signal;current sensing circuitry for sensing current through a motor that rotates in response to the speed controller;circuitry for storing, into a storage device, history data representative of the current through a motor when the motor operates to rotate the load; andcircuitry for modifying the motor control signal in response to the history data.2. The system of wherein the circuitry for modifying comprises circuitry for reading data from the storage device at an address that corresponds to an angular location of a shaft of the motor claim 1 , wherein the address is advanced beyond a present location of the shaft of the motor.3. The system of wherein the circuitry for storing comprises:circuitry for receiving an indication of a present angular location of a shaft of the motor; andcircuitry for storing a measure of the current at a location in the storage device corresponding to the present angular location.4. The system of wherein the circuitry for storing comprises:circuitry for receiving an indication of a present angular location of a shaft of the motor; andcircuitry for storing a measure of the current along with an indication of the present ...

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Номер записи: 48
29-01-2015 дата публикации

Traction Motor Retarding Flux Reference

Номер: US20150028782A1
Автор: Crosman, III Alexander Cameron, Williams Joshua M.
Принадлежит: CATERPILLAR INC.

A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip. 1. A method of adjusting electrical power application in a motor control system using an AC motor driven by an inverter bank that is coupled to a resistive grid during retard operation , the method comprising:developing a nominal flux estimate corresponding to a DC link voltage;adjusting the nominal flux estimate with a scale factor; andsetting inverter operation to adjust motor torque based on the adjusted flux estimate.2. The method of claim 1 , wherein the scale factor is a resistance scale factor calculated as a ratio of measured grid resistance and a base grid resistance.4. The method of claim 1 , wherein adjusting the nominal flux estimate further comprises adjusting the nominal flux estimate using a power scale factor when the AC motor is operating in a constant power region.5. The method of claim 4 , wherein the power scale factor is a function of a torque times mechanical frequency vs. a characteristic torque times a corner point mechanical frequency.6. The method of claim 1 , wherein adjusting the nominal flux estimate further comprises adjusting the nominal flux estimate using a torque scale factor when the AC motor is operating in a constant ...

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Номер записи: 49
29-01-2015 дата публикации

INDUCTION MOTOR FLUX AND TORQUE CONTROL

Номер: US20150028792A1
Автор: Tang Yifan
Принадлежит: ATIEVA, INC.

An induction motor controller is provided. The induction motor controller includes a first module that derives a commanded stator voltage vector, in a stator flux reference frame, via a rotor flux regulator loop and a torque regulator loop, which process at least partially in the stator flux reference frame. The induction motor controller includes a second module that processes the commanded stator voltage vector to produce AC (alternating current) power for an induction motor. 1. An induction motor controller , comprising:a first module that derives a commanded stator voltage vector, in a stator flux reference frame, via a rotor flux regulator loop and a torque regulator loop, which process at least partially in the stator flux reference frame; anda second module that processes the commanded stator voltage vector to produce AC (alternating current) power for an induction motor.2. The induction motor controller of claim 1 , wherein:the second module transforms the commanded stator voltage vector from the stator flux reference frame to a phase voltage reference frame, applying vector rotation according to a stator flux angle;the second module generates pulse width modulation switching controls for a DC (direct current) to AC inverter from the commanded stator voltage vector as transformed to the phase voltage reference frame; andthe second module generates three-phase AC power for the induction motor from the pulse width modulation switching controls.3. The induction motor controller of claim 1 , further comprising:a third module that produces a torque, a stator flux angle, a rotor flux, a stator current vector expressed in the stator flux reference frame, and a rotor current vector expressed in the stator flux reference frame, from a stator voltage vector expressed in a phase voltage reference frame, a stator current of at least two phases, and a rotational speed of a rotor of the induction motor.4. The induction motor controller of claim 3 , wherein:the rotor flux ...

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Номер записи: 50
25-01-2018 дата публикации

MACHINE TOOL AND DETECTION METHOD

Номер: US20180026565A1
Автор: FUJIKI Masahiro, FUKUZONO Seiichi, NAKAMINAMI Masamitsu
Принадлежит: DMG MORI CO., LTD.

A machine tool is provided capable of detecting an abnormality caused by detaching a spindle. The machine tool includes: the spindle configured to rotate a workpiece or a tool; a sensor configured to output a signal according to a rotation angle of the spindle; and a controller configured to detect occurrence of an abnormality in at least one of the spindle and the sensor when an electrical signal different from the signal output during each of rotation of the spindle and halt of the spindle is output from the sensor. 1. A machine tool comprising:a spindle configured to rotate a workpiece or a tool;a sensor configured to output a signal according to a rotation angle of the spindle; anda controller configured to detect occurrence of an abnormality in at least one of the spindle and the sensor when a signal different from the signal output during each of rotation of the spindle and halt of the spindle is output from the sensor.2. The machine tool according to claim 1 , wherein the sensor is a magnetic encoder.3. The machine tool according to claim 1 , whereinduring each of the rotation of the spindle and the halt of the spindle, the sensor outputs two signals, each signal having phases shifted from each other by a predetermined angle, andthe controller detects the occurrence of the abnormality when a phase difference between the two signals is not the predetermined angle.4. The machine tool according to claim 1 , further comprising an output device configured to output a warning to indicate the occurrence of the abnormality when the abnormality is detected by the controller.5. The machine tool according to claim 1 , wherein a timing at which the warning is output includes a timing at which a primary power supply of the machine tool is turned on. The machine tool according to claim 1 , wherein the controller stops the warning when a predetermined input is received.7. The machine tool according to claim 1 , further comprising:a primary power supply configured to supply ...

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Номер записи: 51
10-02-2022 дата публикации

BACKSPINNING MOTOR CONTROL

Номер: US20220045639A1
Автор: DEVOS Thomas, DUTREY Alain, MALRAIT François
Принадлежит: Schneider Toshiba Inverter Europe SAS

Examples include a method of control implemented in a variable speed drive for controlling an electric motor during backspin, wherein the method comprises includes: determining, by the variable speed drive, a mechanical power value occurring at a backspin speed and an estimated load torque; determining, by the variable speed drive, a specific electrical losses profile occurring at a motor flux level, wherein the specific electrical losses profile coincides with the mechanical power value; determining, by the variable speed drive, a flux reference and a speed reference to be applied to the motor to coincide with the specific electrical losses profile ; and controlling, by the variable speed drive, the backspin speed of the motor to maintain the coincidence with the specific electrical losses profile. 1. A method of control implemented in a variable speed drive for controlling an electric motor during backspin , wherein the method comprises:determining, by the variable speed drive, a mechanical power value occurring at a backspin speed and an estimated load torque;determining, by the variable speed drive, a specific electrical losses profile occurring at a motor flux level, wherein the specific electrical losses profile coincides with the mechanical power value;determining, by the variable speed drive, a flux reference and a speed reference to be applied to the motor to coincide with the specific electrical losses profile; andcontrolling, by the variable speed drive, the backspin speed of the motor to maintain the coincidence with the specific electrical losses profile.2. The method according to claim 1 , wherein controlling the backspin speed of the motor comprises redetermining the specific electrical losses profile to update the flux reference.3. The method according to claim 1 , wherein controlling the backspin speed of the motor comprises extracting claim 1 , from the specific electrical losses profile claim 1 , an electrical losses value occurring at the ...

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Номер записи: 52
23-01-2020 дата публикации

MOTOR CONTROL APPARATUS, MOTOR CONTROL METHOD, AND MOTOR CONTROL SYSTEM

Номер: US20200028461A1
Автор: MATSUMURA Isamu
Принадлежит: KABUSHIKI KAISHA YASKAWA DENKI

A motor control apparatus () according to the present disclosure is configured to control motors (#-#), automatically acquire identification information of a plurality of encoders (#-#), the encoders (#-#) being configured to be connected in series under a control of the motor control apparatus () and to detect position information of the motors (#-#) or position information of a mechanical apparatus configured to be driven by the motors (#-#), and store the identification information and the motor control unit in a non-volatile memory () in association with each other. 1. A motor control apparatus comprising:a motor control circuitry configured to control a motor;a circuitry configured to automatically acquire identification information of position detectors which are connected in series and which are configured to detect position information of the motor or position information of a mechanical apparatus to be driven by the motor; anda non-volatile memory in which the identification information is stored in association with the motor control circuitry.2. The motor control apparatus according to claim 1 , wherein compare the identification information of the position detectors which has been acquired from the plurality of position detectors to the identification information of the position detectors which has been stored in the non-volatile memory, and', 'determine whether the position detectors operate in association with the motor control circuitry and/or whether a connection configuration of the plurality of position detectors is not changed., 'the circuitry is configured to'}3. A motor control apparatus comprising:a motor control circuitry configured to control a motor;a circuitry configured to automatically acquire identification information of a position detector and a sensor connected in series;a non-volatile memory in which the identification information is stored in association with the motor control circuitry;the position detector being configured to ...

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Номер записи: 53
23-01-2020 дата публикации

APPARATUS AND METHOD FOR CONTROLLING INVERTER FOR DRIVING MOTOR

Номер: US20200028462A1
Автор: BAE Su Hyun, HA Tae Won, Kim Sung Kyu, LEE Yong Jae, Park Joo Young, Shin Ho Joon
Принадлежит:

An apparatus for controlling an inverter for driving a motor includes a processor which includes: a current processor for generating a voltage command for causing a current detection value obtained by measuring a current supplied from the inverter to the motor to follow a current command for driving the motor; a voltage modulator for generating a pulse width modulation signal for controlling on and off states of switching elements in the inverter with a predetermined switching frequency based on the voltage command; and a frequency determining processor for setting a frequency change range within which the switching frequency will be randomly changed and randomly determining the switching frequency within the frequency change range when a random pulse width modulation method is applied to control of the inverter. 1. An apparatus for controlling an inverter for driving a motor , the apparatus comprising a processor which includes:a current processor for generating a voltage command for causing a current detection value obtained by measuring a current supplied from the inverter to the motor to follow a current command for driving the motor;a voltage modulator for generating a pulse width modulation signal for controlling on and off states of switching elements in the inverter with a predetermined switching frequency based on the voltage command; anda frequency determining processor for setting a frequency change range which is a range within which the switching frequency is randomly changed, and for randomly determining the switching frequency within the frequency change range when a random pulse width modulation method is applied to control of the inverter,wherein the frequency determining processor applies the random pulse width modulation method or stops application of the random pulse width modulation method by gradually increasing or decreasing the frequency change range.2. The apparatus according to claim 1 , wherein the frequency determining processor gradually ...

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Номер записи: 54
28-01-2021 дата публикации

ELECTRIC MACHINE CONTROL METHOD AND ELECTRIC MACHINE CONTROL DEVICE

Номер: US20210028733A1
Автор: Fujiwara Kengo, Mizuguchi Takahiro, SHOUJI Mitsuhiro
Принадлежит: NISSAN MOTOR CO., LTD.

An electric machine control method includes: calculating a voltage command value based on a torque command value to an electric machine; calculating a modulation rate based on a power-supply voltage and the voltage command value; calculating a compensation gain in accordance with the modulation rate, the compensation gain being used to linearize a relationship between a magnitude of the voltage command value and a magnitude of a fundamental wave component of an output voltage to the electric machine; calculating a compensated voltage command value based on the voltage command value and the compensation gain; controlling the output voltage to the electric machine based on the compensated voltage command value; and limiting the compensation gain to be equal to or less than a predetermined upper limit. 19.-. (canceled)10. An electric machine control method comprising:selecting a control mode from a current vector control and a voltage phase control in accordance with a predetermined condition, the current vector control using a first voltage command value calculated so that an output current of an electric machine follows a current command value generated based on a torque command value to the electric machine, the voltage phase control using a second voltage command value calculated based on a voltage norm command value and a voltage phase, the voltage norm command value being based on a power-supply voltage and a predetermined modulation rate command value, the voltage phase being based on the power-supply voltage and the torque command value;setting, as a voltage command value, either one of the first voltage command value and the second voltage command value in accordance with the control mode thus selected;calculating a modulation rate based on the power-supply voltage and the voltage command value;calculating a compensation gain in accordance with the modulation rate, the compensation gain being used to linearize a relationship between a magnitude of the voltage ...

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Номер записи: 55
28-01-2021 дата публикации

MOTOR CONTROL DEVICE AND MOTOR CONTROL METHOD

Номер: US20210028736A1
Автор: IMAYOSHI Hiroyuki, MATSUSHITA Tadanori, Nitta Koichi, SATO Mitsunori
Принадлежит: KABUSHIKI KAISHA YASKAWA DENKI

A motor control device includes a first storage configured to store indicated values of control parameters, motor control circuitry configured to control a motor based on the indicated values stored in the first storage, primary setting circuitry configured to set in the first storage at least one indicated value among the indicated values as a primary indicated value which corresponds to specific parameter among the control parameters, secondary setting circuitry configured to replace, based on a change instruction input via a terminal, the primary indicated value stored in the first storage with a secondary indicated value in accordance with the change instruction, and resetting circuitry configured to replace the secondary indicated value stored in the first storage with the primary indicated value when a return requirement is satisfied after the secondary setting circuitry has replaced the primary indicated value with the secondary indicated value. 1. A motor control device comprising:a first storage configured to store indicated values of control parameters;motor control circuitry configured to control a motor based on the indicated values stored in the first storage;primary setting circuitry configured to set in the first storage at least one indicated value among the indicated values as a primary indicated value which corresponds to specific parameter among the control parameters;secondary setting circuitry configured to replace, based on a change instruction input via a terminal, the primary indicated value stored in the first storage with a secondary indicated value in accordance with the change instruction; andresetting circuitry configured to replace the secondary indicated value stored in the first storage with the primary indicated value when a return requirement is satisfied after the secondary setting circuitry has replaced the primary indicated value with the secondary indicated value.2. The motor control device according to claim 1 , wherein a first ...

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Номер записи: 56
01-05-2014 дата публикации

CONTROL APPARATUS FOR AC MOTOR

Номер: US20140117893A1
Автор: ITOH Takeshi, KAKO Hirofumi, OMATA Ryuji, Suzuki Takashi
Принадлежит: Denso Corporation

A current estimation section of a motor control apparatus carries out the following processing. When an AC motor is controlled under a current feedback control scheme (sine wave control mode or overmodulation control mode), a β-axis current iβ is calculated based on a current detection value iw_sns in a sensor phase and a current command value iv* in one other phase. When the AC motor is controlled under a torque feedback control scheme (rectangular wave control mode), the β-axis current iβ is calculated based on a differential value Δiα of an α-axis current. Then a sensor phase reference current phase θx is calculated to estimate a U-phase current. Thus it is possible to use the current feedback control scheme and the torque feedback control scheme together. 1. A control apparatus for an AC motor comprising:an inverter for driving a three-phase AC motor;a current sensor for detecting a current flowing in a sensor phase in only one of three phases of the AC motor; anda controller for controlling energization of the AC motor by switching turn-on/off of a plurality of switching elements of the inverter, the controller further switching a control scheme between a current feedback control scheme and a torque feedback control scheme in controlling energization of the AC motor, the current feedback control scheme feeding a current detection value in the sensor phase detected by the current sensor and a current estimation value based on the current detection value back to a current command value, and the torque feedback control scheme feeding a torque estimation value pertaining to driving of the AC motor back to a torque command value,wherein the controller has a current estimating section for estimating a d-axis current estimation value and a q-axis current estimation value based on the current detection value in the sensor phase, and calculates the torque estimation value based on the d-axis current estimation value and the q-axis current estimation value calculated by ...

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Номер записи: 57
17-02-2022 дата публикации

Torque Control Based on Rotor Resistance Modeling in Induction Motors

Номер: US20220052633A1
Автор: Crosman III Alexander C., Nino Baron Carlos Eduardo, Reddy Suresh Baddam, Sopko Jr. Thomas Michael
Принадлежит: CATERPILLAR INC.

A control system for an induction motor executes an on-board, dynamic model to estimate rotor resistance and control the torque output by the induction motor. The model includes equations to calculate stator and rotor temperatures and/or resistances based on combinations of voltage and current data, electrical frequency, rotor speed, switching patterns, and air flow rates during operation of the induction motor. The control system updates the model based on feedback collected during the operation of the induction motor, including the difference between the actual observed stator temperature and the stator temperature predicted by the model. The model is updated to converge the predicted stator temperature on the actual observed stator temperature, and corresponding updates are made to the rotor resistance estimations to provide more accurate estimations of the rotor resistance and improve the accuracy of the induction motor torque output. 1. A control system for an induction motor , comprising:a plurality of sensors connectable to the induction motor, the plurality of sensors including a stator temperature sensor and one or more additional sensors;one or more central processing units (CPUs) in communication with the plurality of sensors; and receiving sensor data from the one or more additional sensors during operation of the induction motor;', 'determining a predicted temperature of a stator of the induction motor based at least in part on the sensor data from the one or more additional sensors;', 'receiving an observed temperature of the stator from the stator temperature sensor;', 'determining a difference between the predicted temperature and the observed temperature of the stator;', 'determining a resistance of a rotor of the induction motor based at least in part on the difference between the predicted temperature and the observed temperature of the stator; and', 'controlling a torque output the induction motor based at least in part on the resistance of the ...

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Номер записи: 58
30-01-2020 дата публикации

ELECTRIC MACHINE, MOTOR VEHICLE WITH ELECTRIC MACHINE, AND METHOD FOR OPERATING AN ELECTRIC MACHINE

Номер: US20200035423A1
Автор: STRAßER Roman
Принадлежит: Audi AG

An electric machine, to a motor vehicle with such an electric machine, and to a method for operating such an electric machine. The electric machine includes at least one sliding contact which is formed by a slip ring connected to a rotor and by at least one brush and via which an operating current flows during an operation of the electric machine. A control unit is configured to control the operation of the electric machine. The control unit is configured to verify a predetermined operating criterion of the electric machine and, if said operating criterion is met, to inject a cleaning current according to a predetermined scheme, which then flows independently of the operating current via the sliding contact and cleans said sliding contact in order to maintain or improve a current transfer capability of the sliding contact. 1. An electric machine , in particular for a motor vehicle , comprising:at least one sliding contact which is formed by a slip ring connected to a rotor of the electric machine and by at least one brush, and via which an operating current flows during an operation of the electric machine, and with a control unit which is configured to control the operation of the electric machine,wherein the control unit is configured to verify a predetermined operating criterion of the electric machine and, if the predetermined operating criterion is met, to inject a cleaning current according to a predetermined scheme, which then flows independently of the operating current via the sliding contact and cleans said sliding contact in order to maintain or improve a current transfer capability of the sliding contact.2. The electric machine according to claim 1 , wherein the electric machine is a separately excited synchronous machine claim 1 , and in that the operating current is an excitation current for generating a magnetic field rotating with the rotor.3. The electric machine according to claim 1 , wherein at least one peak value of the cleaning current is a ...

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Номер записи: 59
31-01-2019 дата публикации

MOTOR CONTROLLER

Номер: US20190036470A1
Автор: Hashimoto Shoutarou, MORITA Yuuki
Принадлежит:

A motor controller includes: a rotation speed estimating unit that estimates a rotation speed of a motor on the basis of current information and primary frequency information of the motor; a proximity switch that outputs an ON signal when a portion of a rotating body of the motor is in proximity and outputs an OFF signal when a portion of the rotating body of the motor is not in proximity; a rotation speed computing unit that computes a rotation speed of the motor on the basis of the ON signal and the OFF signal; and a state determining unit that determines whether a present state is a speed attainment state and whether a present state is a speed zero state on the basis of a rotation speed estimation value estimated by the rotation speed estimating unit and a rotation speed computation value computed by the rotation speed computing unit. 1. A motor controller that performs speed sensorless control for a motor , comprising:a rotation speed estimating unit that estimates a rotation speed of the motor on the basis of current information and primary frequency information of the motor;a proximity switch that outputs an ON signal when a portion of a rotating body of the motor is in proximity and outputs an OFF signal when a portion of the rotating body of the motor is not in proximity;a rotation speed computing unit that computes a rotation speed of the motor on the basis of the ON signal and the OFF signal output from the proximity switch; anda state determining unit that determines whether a present state is a speed attainment state in which the rotation speed of the motor reaches a speed command value and whether a present state is a speed zero state in which the rotation speed of the motor is zero on the basis of a rotation speed estimation value estimated by the rotation speed estimating unit and a rotation speed computation value computed by the rotation speed computing unit.2. The motor controller according to claim 1 , wherein the state determining unit determines ...

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Номер записи: 60
31-01-2019 дата публикации

MOTOR CONTROLLER

Номер: US20190036471A1
Автор: Hashimoto Shoutarou, MORITA Yuuki
Принадлежит:

A motor controller includes: a primary frequency control unit that generates a primary frequency command value based on current information of an induction motor and limits the primary frequency command value based on a maximum primary frequency; a rotation speed estimating unit that estimates a slip frequency based on the current information of the induction motor and estimates a rotation speed based on the estimated slip frequency estimation value and the primary frequency command value; a proximity switch that outputs an ON signal or OFF signal when a portion of a rotating body of the induction motor is in proximity or not in proximity; a rotation speed computing unit that computes a rotation speed based on the ON signal and the OFF signal; and a maximum primary frequency computing unit that computes the maximum primary frequency based on the rotation speed computation value. 1. A motor controller that performs speed sensorless control for an induction motor , comprising:a primary frequency control unit that generates a primary frequency command value of the induction motor on the basis of current information of the induction motor and limits the primary frequency command value on the basis of a maximum primary frequency;a rotation speed estimating unit that estimates a slip frequency of the induction motor on the basis of the current information of the induction motor and estimates a rotation speed of the induction motor on the basis of the estimated slip frequency estimation value and the primary frequency command value from the primary frequency control unit;a speed control system that performs speed control of the induction motor on the basis or a speed command value and the rotation speed estimation value estimated by the rotation speed estimating unit;a proximity switch that outputs an ON signal when a portion of a rotating body of the induction motor is in proximity and outputs an OFF signal when a portion of the rotating body of the induction motor is not ...

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Номер записи: 61
04-02-2021 дата публикации

INVERTER CONTROL METHOD, AND INVERTER CONTROL APPARATUS

Номер: US20210036645A1
Автор: Yokoyama Nobuaki
Принадлежит: NISSAN MOTOR CO., LTD.

A control method of inverter for driving motor including a magnet, comprises detecting a rotation state of the motor by a rotation sensor, detecting current of the motor by a current sensor, calculating, based on a torque command value, a detection value of the rotation state detected by the rotation sensor, and detection current detected by the current sensor, a voltage command value for controlling a voltage of the motor by a controller for controlling the inverter, specifying a value of at least one of a local maximum value, a local minimum value, and an average value of the torque voltage command value included in the voltage command value as a torque determination target command value by the controller, comparing a demagnetizing determination threshold value with the torque determination target command value by the controller, and determining whether or not demagnetization of the magnet occurs in accordance with the compared result. 1. A control method of inverter for driving motor including a magnet , comprising:detecting a rotation state of the motor by a rotation sensor;detecting current of the motor by a current sensor;calculating, based on a torque command value; a detection value of the rotation state detected by the rotation sensor, and detection current detected by the current sensor, a voltage command value for controlling a voltage of the motor by a controller for controlling the inverter;specifying a value of at least one of a local maximum value, a local minimum value, and an average value of the torque voltage command value included in the voltage command value as a torque determination target command value by the controller;comparing a demagnetizing determination threshold value with the torque determination target command value by the controller; anddetermining whether or not demagnetization of the magnet occurs in accordance with the compared result.2. The inverter control method according to claim 1 , further comprising measuring a start time ...

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Номер записи: 62
04-02-2021 дата публикации

OPERATING AN ELECTRICAL MACHINE

Номер: US20210036652A1
Автор: Cordero Enrique, Fitz Rudolf, Gemassmer Tobias, Sontheim Florian
Принадлежит:

A method for operating an electrical machine is used to calculate a value of a first torque which can be provided at a maximum by the electrical machine in a future interval, wherein, by limiting the torque which is provided in the interval to the value, overheating of at least one semiconductor, which is required for transmitting the electrical power, due to a power loss is prevented and/or the threat of overheating and the onset of derating is diagnosed and therefore prevented. 112-. (canceled)13. A method for the operation of an electric machine comprising:a) ascertaining electrical parameters with which the electric machine is being operated at a current time point;b) calculating a maximum second torque that can be generated by the electric machine at the electrical parameters;c) calculating an electrical power loss that would arise at at least one semiconductor if the maximum second torque that can be generated is applied, wherein the at least one semiconductor is required for transmission of the electrical power resulting from a power loss;d) calculating a resulting first temperature of a semiconductor junction layer of the at least one semiconductor that would result from the electrical power loss present during a future interval;e) iteratively performing steps b) to d) with smaller values of the maximum second torque that can be generated according to step b) each iteration until the resulting first temperature that is calculated in accordance with step d) corresponds at most to a maximum permissible second temperature of the semiconductor junction layer; andf) then one of operating the electric machine during the future interval with a torque whose value is at most the maximum second torque ascertained by step e) or operating the electric machine with a higher torque than the maximum second torque ascertained by step e) for an interval shorter than the future interval.14. The method of claim 13 , wherein the electrical parameters in step a) comprise a ...

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Номер записи: 63
09-02-2017 дата публикации

MOTOR CONTROL DEVICE AND MOTOR CONTROL METHOD

Номер: US20170040916A1
Автор: KAKU Yasuhiko, YOSHIURA Yasufumi
Принадлежит:

Provided is a motor control device, including an acceleration command calculation unit configured to calculate an acceleration command directed to a motor, a torque command calculation unit configured to calculate a torque command directed to the motor based on the acceleration command and a predetermined moment-of-inertia value, a torque correction value calculation unit configured to estimate disturbance of the motor based on the torque command and at least one of a motor position or a motor speed, to thereby calculate a torque correction value for the torque command, and a moment-of-inertia value change unit configured to change the predetermined moment-of-inertia value based on an estimated moment-of-inertia ratio, which is a ratio of the torque correction value to the torque command. 1. A motor control device , comprising:an acceleration command calculation unit configured to calculate an acceleration command directed to a motor;a torque command calculation unit configured to calculate a torque command directed to the motor based on the acceleration command and a predetermined moment-of-inertia value;a torque correction value calculation unit configured to estimate disturbance of the motor based on the torque command and at least one of a motor position or a motor speed, to thereby calculate a torque correction value for the torque command; anda moment-of-inertia value change unit configured to change the predetermined moment-of-inertia value based on an estimated moment-of-inertia ratio, which is a ratio of the torque correction value to the torque command.2. The motor control device according to claim 1 , wherein the moment-of-inertia value change unit is configured to stepwise change the predetermined moment-of-inertia value based on the estimated moment-of-inertia ratio.3. The motor control device according to claim 2 , wherein a threshold for the estimated moment-of-inertia ratio when the moment-of-inertia value change unit increases the predetermined ...

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Номер записи: 64
24-02-2022 дата публикации

Motor tracking error reduction method and implementation device based on micro-drive unit

Номер: US20220060125A1
Автор: Jian Gao, Jindi Zhang, Lanyu Zhang, Lingwei TAN, Xin Chen, Yuheng LUO
Принадлежит: GUANGDONG UNIVERSITY OF TECHNOLOGY

The present disclosure relates to the technical field of mechanical precision manufacturing, in particular to a motor tracking error reduction method and an implementation device based on a micro-drive unit. A motor tracking error reduction method based on micro-drive unit includes: providing a motor mover as the working output end, and feeding back the position information of the motor mover to the micro-drive controller in real time by the sensor; controlling the micro-drive unit to compensate the displacement of the motor mover by the micro-drive controller; correcting the tracking error of the motor mover after the displacement compensation, and feeding back the tracking error information after correction to the motor controller. The error reduction method and implementation device in the present disclosure reduce the motor tracking error and solve the problem of coupling interference. In addition, the single position feedback is used to reduce the production cost.

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Номер записи: 65
24-02-2022 дата публикации

MULTISTEP FINITE CONTROL SET MODEL PREDICTIVE CONTROL METHOD AND SYSTEM FOR LINEAR INDUCTION MACHINES

Номер: US20220060129A1
Автор: DONG Dinghao, Liu Yi, TANG Yirong, XU WEI, ZOU Jianqiao
Принадлежит: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

A multistep finite control set model predictive control method for linear induction machines is provided, and the method belongs to a control technology field for linear induction machines. The method specifically includes the following steps: collecting a primary phase current of a linear induction machine in a three-phase coordinate system; solving a multistep reference voltage vector sequence by iteration according to a current value; keeping only two non-zero voltage vectors and one zero voltage vector that are closest to a reference voltage vector in each predictive step; and further eliminating a voltage vector sequence having a large cost function value through dynamic online comparison with a cost function value. The disclosure relates to a control technology field for linear induction machines, and in particular, relates to a multistep finite control set model predictive control method and system.The electromagnetic structure of linear induction machines is derived from the rotary induction machines. In such a structure, the circular stator is sectioned and flattened along the radial direction and then becomes a straight line, so that linear motion is generated without the need for an intermediate transmission conversion device. However, because the structure at both ends of the linear machine is open, an end effect is generated, and the flux linkage may attenuate when the machine is running at a high speed, so it is difficult for the machine to generate high thrust at a high speed.Since the linear machine parameters change drastically, the linear machine parameters may change with the operating conditions of the machine. Conventional control strategies include, for example, the vector control and direct thrust control strategy, but these strategies do not take into account the changes of machine parameters, so it is difficult to obtain a good control result. The model predictive control algorithm may be combined with the linear induction machine equivalent ...

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Номер записи: 66
19-02-2015 дата публикации

THREE-PHASE AC INDUCTION MOTOR CONTROL DEVICE AND THREE-PHASE AC INDUCTION MOTOR CONTROL METHOD

Номер: US20150048774A1
Автор: Iijima Yoshihiro, Nakamura Hideo, Tazoe Kazuhiko, Umeki Shiho
Принадлежит: NISSAN MOTOR CO., LTD.

Disclosed is a three-phase AC induction motor control device for controlling a torque based on a two-axis orthogonal coordinate system in synchronization with a power supply angular frequency, the control device including: a non-interference controller configured to receive a motor rotation speed, a torque command value, and a power supply voltage as an input and compute a torque axis non-interference compensation voltage and a magnetic flux axis non-interference compensation voltage by referencing a map stored in advance; and a non-interference magnetic flux response filter configured to perform filtering, including a direct transfer term and a rotor magnetic flux response delay, for the torque axis non-interference compensation voltage. 15.-. (canceled)6. A three-phase AC induction motor control device configured to control a torque based on a two-axis orthogonal coordinate system in synchronization with a power supply angular frequency , the control device comprising:a non-interference controller configured to receive a motor rotation speed, a torque command value, and a power supply voltage as an input and compute a torque axis non-interference compensation voltage and a magnetic flux axis non-interference compensation voltage by referencing a map stored in advance; anda non-interference magnetic flux response filter configured to perform filtering for the torque axis non-interference compensation voltage depending on a rotor magnetic flux response delay.7. The three-phase AC induction motor control device according to claim 6 , wherein the three-phase AC induction motor control device is configured perform an electric current feedback control and further comprises:a first filter configured to perform a delay process, in which an electric current control delay in the electric current feedback control is simulated, for the magnetic flux axis non-interference compensation voltage; anda second filter configured to perform a delay process, in which an electric ...

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Номер записи: 67
15-02-2018 дата публикации

MOTOR OPERATING SYSTEMS AND METHODS THEREOF

Номер: US20180048253A1
Автор: CHENG Liao-Shun, LEE Wen-Jan
Принадлежит:

A motor operating system includes a parameter-setting module and a control circuit. The parameter-setting module generates a first parameter-setting corresponding to a first operating stage through a user interface, and determines whether a first operating status conforms to a first threshold setting. The control circuit is coupled to a motor, receives the first parameter-setting corresponding to the first operating status, drives the motor according to a first driving signal corresponding to the first parameter-setting, and outputs the first operating status corresponding to the first driving signal. When the first operating status does not conform the first threshold setting, the parameter-setting module generates an adjusted first parameter-setting. When the first operating status conforms the first threshold setting, the parameter-setting module sets the first parameter-setting as a first optimal parameter-setting. 1. A motor operating system , comprising:a parameter-setting module, generating a first parameter-setting corresponding to a first operating stage through a user interface, and determining whether a first operating status corresponding to the first parameter-setting conforms to a first threshold setting; and a buffer, receiving the first parameter-setting;', 'a controller, reading the first parameter-setting from the buffer, and generating a first driving signal according to the first parameter-setting;', 'a driver, driving the motor according to the first driving signal;', 'a monitor, monitoring the first operating status of the motor corresponding to the first driving signal, and outputting the first operating status; and', 'a memory, storing a first optimal parameter-setting;, 'a control circuit, coupled to the parameter-setting module and a motor, comprisingwherein when the first operating status does not conform to the first threshold setting, the parameter-setting module generates a modified first parameter-setting through the user interface; ...

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Номер записи: 68
03-03-2022 дата публикации

MOTOR STATOR RESISTANCE CALCULATION

Номер: US20220065909A1
Автор: Lamb Jacob, Li Bing, Wei Lixiang
Принадлежит:

For motor stator resistance calculation, a method estimates an output voltage using a Direct Current (DC) bus voltage and a duty ratio for a motor drive at a first switching frequency and at least one second switching frequency. The method measures an output current at the first switching frequency and the at least one second switching frequency. The method calculates a first stator resistance for the first switching frequency and at least one second stator resistance for the at least one second switching frequency. The method estimates a stator resistance at a DC condition based on the first stator resistance and the at least one second stator resistance. The method sets a dynamic compensation based on a stator resistance error between the first switching frequency and the at least one second switching frequency.

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Номер записи: 69
26-02-2015 дата публикации

Control device of ac motor

Номер: US20150054432A1
Автор: Ryuji OMATA, Takahumi Oowada
Принадлежит: Denso Corp

A control device of a three-phase AC motor includes: an inverter for driving the motor; a current sensor for sensing a sensor phase current of the motor; and a controller for controlling the motor. The controller includes: a current estimation device for estimating d-axis and q-axis current estimated values based on the sensor phase current and an electric angle of the motor; and a zero-crossing interpolation device for interpolating the d-axis and q-axis current estimated values by fixing the d-axis and q-axis current estimated values when the sensor phase current is in a zero cross range, which includes a zero point, so that the sensor phase current crosses the zero point, and for outputting interpolated d-axis and q-axis current estimated values as fixed d-axis and q-axis values, which are used for a feedback control relating to current flowing through the motor.

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Номер записи: 70
22-02-2018 дата публикации

Motor control device, motor control method and computer readable recording medium

Номер: US20180052449A1
Автор: Satoshi Ikai, Tsutomu Nakamura
Принадлежит: FANUC Corp

A motor control device includes a velocity controller configured to calculate a torque command from a velocity command and a motor velocity; a compensation torque calculation unit configured to calculate a compensation torque command by multiplying an error between the motor velocity and a velocity of a driven part by a compensation gain and a compensation filter; a torque control unit configured to control torque of a motor based on a value obtained by adding the torque command and the compensation torque command; and a setting change part configured to change a gain of the velocity controller according to an operating condition of the motor control device, and change at least one of the compensation gain and the compensation filter in accordance with a change in the gain of the velocity controller.

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Номер записи: 71
25-02-2016 дата публикации

CONTROL TECHNIQUES FOR AN INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR OF AN ELECTRIFIED VEHICLE

Номер: US20160056744A1
Автор: Bai Hua, Cheng Bing, Khan Ahmad Arshan, Lee Young Joo, Taylor Allan, Yang Fei
Принадлежит:

A system and method for controlling an interior permanent magnet synchronous motor (IPMSM) are presented. In an exemplary implementation, phase current ripple estimation techniques are utilized for variable frequency switching pulse-width modulation control of the IPMSM. In one implementation, the method includes controlling a three-phase inverter based on an initial switching frequency to generate a three-phase alternating current (AC) voltage for the IPMSM. Transformed voltages are determined in a rotating reference frame based on the three-phase AC voltage in the stationary reference frame. Current ripples are determined in the rotating reference frame based on the transformed voltages. Phase current ripples are determined in the stationary reference frame based on the current ripples in the rotating reference frame. A modified switching frequency for the three-phase inverter is determined based on the initial switching frequency and the phase current ripples. The three-phase inverter is then controlled based on the modified switching frequency. 1. An electrified vehicle , comprising:an interior permanent magnet synchronous motor (IPMSM) configured to generate drive torque in response to a three-phase AC voltage;a power source configured to generate a direct current (DC) voltage;a three-phase inverter configured to convert the DC voltage to the three-phase AC voltage for the IPMSM; and control the three-phase inverter based on an initial switching frequency to generate the three-phase AC voltage;', 'determine transformed voltages in a rotating reference frame based on the three-phase AC voltage in a stationary reference frame;', 'determine voltage ripples in the rotating reference frame based on the transformed voltages;', 'determine current ripples in the rotating reference frame based on the voltage ripples;', 'determine phase current ripples in the stationary reference frame based on the current ripples in the rotating reference frame;', 'determine a modified ...

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Номер записи: 72
25-02-2016 дата публикации

ROTARY ELECTRIC MACHINE CONTROL APPARATUS

Номер: US20160056745A1
Автор: NAKAJIMA Nobuyori, Ootake Hiroyasu, Satou Takafumi
Принадлежит:

A rotary electric machine control apparatus controlling drive of a rotary electric machine includes a pre-limit d-axis voltage arithmetic portion calculating a pre-limit d-axis voltage command value; a pre-limit q-axis voltage arithmetic portion calculating a pre-limit q-axis voltage command value; a d-axis limit portion calculating a d-axis voltage command value; and a q-axis limit portion calculating a q-axis voltage command value. When an absolute value of the pre-limit q-axis voltage command value is greater than an absolute value of a second limit value, and an absolute value of a previous q-axis voltage command value is equal to or greater than the absolute value of the second limit value and is equal to or less than an absolute value of a first limit value, the q-axis limit portion determines a previous q-axis voltage command value as the q-axis voltage command value. 1. A rotary electric machine control apparatus controlling drive of a rotary electric machine with applied voltage controlled by an inverter , the rotary electric machine control apparatus comprising:a pre-limit d-axis voltage arithmetic portion calculating a pre-limit d-axis voltage command value on a basis of a d-axis current command value and a d-axis current detection value;a pre-limit q-axis voltage arithmetic portion calculating a pre-limit q-axis voltage command value on a basis of a q-axis current command value and a q-axis current detection value;a d-axis limit portion limiting the pre-limit d-axis voltage command value to calculate a d-axis voltage command value; anda q-axis limit portion limiting the pre-limit q-axis voltage command value to calculate a q-axis voltage command value,wherein:a dead zone width is defined between a first limit value and a second limit value;the dead zone width relates to a limitation of the pre-limit q-axis voltage command value;an absolute value of the first limit value is greater than an absolute value of the second limit value;when an absolute value of ...

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Номер записи: 73
25-02-2016 дата публикации

Dynamic Power Control for Induction Motors

Номер: US20160056748A1
Автор: Daly James C., Valenti Leo F., Valenti Thomas J.
Принадлежит:

An example electric motor including a conductive winding, a switching device, a rotor, and a controller is disclosed. The switching device is configured to selectively energize, by an AC source, a first portion of the conductive winding in a first state and a second portion of the conductive winding in a second state. The conductive winding generates a magnetic field having a first strength in the first state and a second strength in the second state. The rotor magnetically interacts with the magnetic field such that a torque is applied to the rotor. The amount of torque applied is related to the strength of the magnetic field. The controller is configured to: (i) determine a metric indicative of a load condition of the electric motor; and (ii) based on the determined metric, cause the switching device to switch between the first state and the second state one or more times. 1. An electric motor comprising:a conductive winding including a plurality of turns, a first terminal, a second terminal, and a third terminal, wherein a first number of the plurality of turns are between the first terminal and the third terminal, a second number of the plurality of turns are between the second terminal and the third terminal, and the first number is different from the second number;a switching device configured to selectively conduct power from the AC source to the first terminal in a first state and the second terminal in a second state, wherein, with the switching device in the first state, the conductive winding generates a first magnetic field responsive to the AC source conducting power to the first terminal, and wherein, with the switching device in the second state, the conductive winding generates a second magnetic field responsive to the AC source conducting power to the second terminal;a rotor configured to magnetically interact with the first and second magnetic fields generated by the conductive winding such that a torque is applied on the rotor; and determine a ...

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Номер записи: 74
14-02-2019 дата публикации

Control Device and Method for Brushless Motor

Номер: US20190052198A1
Автор: Hano Masaki, Okamoto Naoki
Принадлежит: Hitachi Automotive Systems, Ltd.

The present invention provides a control device and a control method for a brushless motor, including energization modes for selecting a phase to be energized by pulse width modulation operation from among phases of the brushless motor, and being provided for controlling the rotation speed of the brushless motor by switching between the energization modes based on comparison of a voltage induced in a non-energized phase with its threshold value. In the control device and method, the input voltage of the brushless motor is increased when the duration for which the induced voltage is maintained unchanged or the duration for which the current energization mode is maintained employed reaches a predetermined time. This prevents the brushless motor from being staying in the stopped state, even when the load on the brushless motor abruptly increases while the brushless motor rotates at a speed within an extremely low speed range. 18.-. (canceled)9. A control device for a brushless motor , the control device having a plurality of energization modes for selecting a phase to be energized by pulse width modulation operation from among a plurality of phases of the brushless motor , and controlling a rotation speed of the brushless motor by switching between the plurality of energization modes based on comparison of a voltage induced in a non-energized phase with a threshold value , the control device comprising:a voltage control unit for increasing an input voltage of the brushless motor when a duration for which the induced voltage is maintained unchanged or a duration for which a currently selected one of the energization modes is maintained employed reaches a predetermined time,wherein the voltage control unit temporarily corrects and increases a command value of the rotation speed of the brushless motor when the duration for which the induced voltage is maintained unchanged or the duration for which a currently selected one of the energization modes is maintained employed ...

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Номер записи: 75
15-05-2014 дата публикации

SYSTEM FOR CONTROLLING A VOLTAGE INVERTER SUPPLYING POWER TO A MULTIPHASE ELECTRICAL MOTOR OF A MOTOR VEHICLE

Номер: US20140132188A1
Автор: Cregut Samuel, Marsilia Marco
Принадлежит: RENAULT S.A.S.

A system for controlling a voltage inverter, or supplying power to a multiphase electric motor of an automobile vehicle, including: a mechanism generating values of power supply voltages for each phase of the electric motor, together with an amplitude value of the power supply voltages; a phase-splicing determination mechanism; and a controller controlling the phase splicing cooperating to control transmission to the voltage inverter of duty cycles generated by determining the duty cycles, as a function of values of power supply voltages for each phase of the electric motor, and also of the amplitude value of the power supply voltages. 19-. (canceled)10. A system for controlling a voltage inverter , or supplying power to a multiphase electric motor of an automobile vehicle , comprising:a means for generating values of power supply voltages for each phase of the electric motor, together with an amplitude value of the power supply voltages;a phase-splicing determination means; anda means for controlling the phase splicing cooperating together to control transmission to the voltage inverter of duty cycles generated by means for determining the duty cycles, as a function of values of power supply voltages for each phase of the electric motor, and also of the amplitude value of the power supply voltages.11. The control system as claimed in claim 10 , in which the phase-splicing determination means comprises phase detection means each configured to generate a phase voltage signal claim 10 , the phase-splicing determination means being further configured to generate a phase identification signal at the output equal to that of the phase voltage signals whose value is non-zero.12. The control system as claimed in claim 10 , in which the means for controlling the phase splicing is configured to generate a signal for enabling the phase splicing depending on a comparison of the amplitude value of the power supply voltages with a splicing enabling threshold and with a splicing ...

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Номер записи: 76
15-05-2014 дата публикации

APPARATUS FOR ESTIMATING PARAMETER IN INDUCTION MOTOR

Номер: US20140132200A1
Автор: Yoo Anno
Принадлежит: LSIS CO., LTD.

An apparatus for estimating a parameter of an induction motor is provided. The estimating apparatus receives an output from a current controller and d and q-axis currents in a synchronous reference frame applied to an induction motor, calculates an error of rotor resistance, and obtains a difference between the rotor resistance and nominal rotor resistance to calculate stator resistance therefrom. 3. The apparatus of claim 1 , further comprising:a switch configured to switch as to whether to estimate rotor resistance according to a flag input.5. The apparatus of claim 4 , wherein the integral controller operates until when the error of the rotor resistance reaches 0.7. The apparatus of claim 2 , further comprising:a switch configured to switch as to whether to estimate rotor resistance according to a flag input. Pursuant to 35 U.S.C. §119(a), this application claims the benefit of earlier filing date and right of priority to Korean Application No. 10-2012-0126567, filed on Nov. 9, 2012, the contents of which is incorporated by reference herein in its entirety.1. Field of the InventionThe present disclosure relates to an apparatus for estimating a parameter of an induction motor in real time.2. Background of the InventionIn general, a general-purpose inverter is commonly used to drive 3-phase induction motor, and in particular, a general-purpose inverter is commonly used in a variable speed driving field using an induction motor, a hoisting load, or a traction load of an electric vehicle,Among parameters of an induction motor, stator resistance and rotor resistance values are changed when a temperature within the induction motor is changed according to a change in a load. Vector control commonly used as an induction motor driving method is significantly dependent upon a motor parameter, so fluctuation of the rotor resistance degrades control performance. This will be described with reference to the accompanying drawings.is a view illustrating a configuration of a ...

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Номер записи: 77
22-02-2018 дата публикации

MODEL PREDICTIVE DAMPING OF OSCILLATIONS IN AN ELECTRICAL CONVERTER SYSTEM

Номер: US20180054112A1
Автор: Al-Hokayem Peter, Pejcic Ivan
Принадлежит:

A method for controlling an electrical controller system (), the method comprising, determining a reference output (ω*) and an estimated output (ω) of the electrical converter system () based on measurements in the electrical converter system (); determining an optimized pulse pattern (uiby selecting from a table of precalculated optimized pulse patterns, which is chosen based on the reference output (ω*) and the estimated output (ω), a pulse pattern comprising a sequence of switching instants (ƒ) applied to the electrical converter system (); determining a resonant oscillation (ψ) in the electrical converter system (), whereby the resonant oscillation (ψ) is composed of an electrical machine () and a LC fiber () of the electrical converter system (); determining a sequence of future states of the electrical converter system () by solving a mathematical model of the electrical converter system () subject to optimizing a cost function and subject to a constraint that a modified pulse pattern (ui) is applied to the electrical converter system (), which modified pulse pattern (u) comprises time shifted switching instants with respect to the optimized pulse pattern (u), wherein the cost function comprises a term compensating the resonant oscillation (ψ) with a pulse response oscillation caused by the time shifted switching instants of the modified pulse pattern (u) and wherein the mathematical model is constrained such that the switching instants of the modified pulse pattern (u) have the same order as the switching instants of the optimized pulse pattern (ui,n), applying the modified pulse pattern (u) to the electrical converter system (). 1. A method for controlling an electrical converter system , the method comprising:{'sub': m', 'm, 'determining a reference output (ω*) and an estimated output (ω) of the electrical converter system based on measurements in the electrical converter system;'}{'sub': i,n', 'm', 'm, 'determining an optimized pulse pattern (u) by ...

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Номер записи: 78
23-02-2017 дата публикации

SYSTEM AND METHOD FOR OPTIMIZING FLUX REGULATION IN ELECTRIC MOTORS

Номер: US20170054396A1
Автор: Sheahan Thomas J.
Принадлежит: NIDEC MOTOR CORPORATION

A system and method for dynamically optimizing flux levels in electric motors based on estimated torque. Motor parameters and motor equations are used to estimate operating characteristics and to set current and voltage limits which define an optimal flux operating range for a given speed and torque of the motor. A slope of a linear flux gain is determined within the defined operating range at different speeds of the motor. The determined slopes for the different speeds are saved in a memory element. A control element determines and achieves an optimal flux level for the motor by accessing the table to identify a specific slope which corresponds to an actual speed of the motor, multiplying the slope by the estimated torque and adding an offset value to determine a phase current component value associated with the optimal flux level, and applying the determined phase current component value to the motor. 1. An electric motor system for optimizing a flux level in an electric motor configured to receive an input power and to drive a load , the electric motor system comprising:an electric motor having a shaft and configured to create a torque on the shaft to drive the load; and [ using a set of motor parameters and a set of motor equations to estimate a slip, a stator frequency, a torque, and a power loss and to set a current limit and a voltage limit which define an optimal flux operating range for a given speed and torque of the electric motor,', 'determining a slope of a linear flux gain within the optimal flux operating range at a plurality of different speeds of the electric motor, and', 'saving in the electronic memory element the slope of the linear flux gain for each different speed, and, 'an electronic memory element containing a table of slopes of a linear flux gain for a plurality of different speeds, wherein the table is created by—'}, accessing the memory element to identify a specific slope of the linear flux gain which corresponds to an actual speed of ...

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Номер записи: 79
05-03-2015 дата публикации

CONTROL CIRCUIT FOR DRIVING MOTOR AND METHOD FOR CONTROLLING SPEED OF MOTOR

Номер: US20150061566A1
Автор: CHIANG Pei-Yu, Kang Yu-Cheng, Wu Yung-Sheng, YANG Ta-Yung
Принадлежит:

A control circuit for driving a motor and a method for controlling a speed of a motor are provided. The control circuit comprises a microcontroller and a drive circuit. The microcontroller has a memory. The drive circuit is configured to drive the BLDC motor according to a control of the microcontroller. The memory include a RPM table, and the microcontroller sends a duty signal to the drive circuit to change a speed of the motor according to the RPM table. 1. A control circuit for driving a motor , comprising:a microcontroller having a memory; anda drive circuit configured to drive the motor according to a control of the microcontroller;wherein the memory include a RPM table; the microcontroller sends a duty signal to the drive circuit to change a speed of the motor according to the RPM table.2. The control circuit as claimed in claim 1 , in which the microcontroller estimates a new RPM value before sending a new duty signal to the drive circuit for changing the speed of the motor; the new RPM value is estimated according to the existed duty signal and a current RPM value.3. The control circuit as claimed in claim 1 , in which the RPM table comprises a inhibit RPM value.4. The control circuit as claimed in claim 1 , in which the speed of the motor is detected by an angle signal claim 1 , wherein the motor is a sensorless motor.5. A method for controlling a speed of a motor claim 1 , comprising:generating a control signal according to a RPM table in a memory; anddriving the motor according to the control signal,wherein the control signal is generated by a microcontroller; the control signal is configured to drive the BLDC motor through a drive circuit.6. The method as claimed in claim 5 , in which the microcontroller estimates a new RPM value before sending a new duty signal to the drive circuit for changing a speed of the motor; the new RPM value is estimated according to a existed duty signal and a current RPM value.7. The method as claimed in claim 5 , in which ...

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Номер записи: 80
10-03-2022 дата публикации

Motor drive input adaptation with in-line drive-sense circuit

Номер: US20220075335A1
Автор: Gray Patrick Troy, JR. Richard Stuart, Morrison Gerald Dale, Seger, Van Ostrand Daniel Keith
Принадлежит: SigmaSense, LLC.

A rotating equipment system with in-line drive-sense circuit (DSC) electric power signal processing includes rotating equipment, in-line drive-sense circuits (DSCs), and one or more processing modules. The in-line DSCs receive input electrical power signals and generate motor drive signals for the rotating equipment. An in-line DSC receives an input electrical power signal, processes it to generate and output a motor drive signal to the rotating equipment via a single line and simultaneously senses the motor drive signal via the single line. Based on the sensing of the motor drive signal via the single line, the in-line DSC provides a digital signal to the one or more processing modules that receive and process the digital signal to determine information regarding one or more operational conditions of the rotating equipment, and based thereon, selectively facilitate one or more adaptation operations on the motor drive signal via the in-line DSC. 1. A rotating equipment system with in-line drive-sense circuit (DSC) electric power signal processing , the rotating equipment system comprising:a rotating equipment operably coupled to receive a motor drive signal, wherein, when enabled, the rotating equipment configured to operate based on power delivered via the motor drive signal; process the input electrical power signal to generate the motor drive signal;', 'output the motor drive signal to the rotating equipment via a single line and simultaneously to sense the motor drive signal via the single line;', 'based on the sensing of the motor drive signal via the single line, detect an effect on the motor drive signal that is based on an electrical characteristic of the rotating equipment;', 'generate a digital signal representative of the electrical characteristic of the rotating equipment; and', 'perform one or more adaptation operations on the motor drive signal based on a determination to perform adaptation of the motor drive signal., 'an in-line drive-sense circuit ( ...

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Номер записи: 81
03-03-2016 дата публикации

MOTOR DRIVING APPARATUS AND REFRIGERATOR INCLUDING SAME

Номер: US20160061506A1
Автор: SON Ho Hyun, SONG Hyun Sook, YOO Myung Keun
Принадлежит:

The present invention relates to a motor driving apparatus and a refrigerator including the same. A motor driving apparatus according to an embodiment of the present invention comprises: a signal delay unit for delaying an input speed order signal; an inverter control unit for outputting an inverter switching control signal, on the basis of the speed order signal delayed by the signal delay unit; and an inverter for converting an input operation direct current power into a predetermined alternating current power, on the basis of a switching operation according to the inverter switching control signal, and driving a motor using the converted alternating current power. Therefore, it is possible to prevent starting failure and reduce noise. 1. A motor driving apparatus comprisinga signal delay unit configured to delay an input speed command signal;an inverter controller configured to output an inverter switching control signal based on the speed command signal delayed by the signal delay unit; andan inverter configured to convert an input operating direct current (DC) voltage into a predetermined alternating current (AC) voltage and driving a motor by the converted AC voltage, based on switching operation according to the inverter switching control signal.2. The motor driving apparatus according to claim 1 , wherein:the signal delay unit delays the input speed command signal by a predetermined time in an initial start-up period of the motor driving apparatus, andthe delay time corresponds to a period until the operating DC voltage input to the inverter reaches a predetermined voltage.3. The motor driving apparatus according to claim 1 , further comprising:a converter controller configured to output a pulse width modulation (PWM)-based speed command signal; anda converter configured to convert the PWM-based speed command signal into a pulse amplitude modulation (PAM)-based speed command signal and output the PAM-based speed command signal,wherein the signal delay unit ...

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Номер записи: 82
21-02-2019 дата публикации

POWER SOURCE SYSTEM

Номер: US20190056771A1
Автор: SATO Fumihiko
Принадлежит: JTEKT CORPORATION

A power source device includes a switching circuit configured to switch the power supply mode between a first power supply mode, in which power is supplied to a drive circuit for an electric motor by only a main power source, and a second power supply mode, in which power is supplied to the drive circuit utilizing both the main power source and an auxiliary power source. A control device includes: a determination unit that determines whether the operation state of the electric motor is a regeneration state or a power-running state; and a unit configured to limit power to be supplied to the drive circuit when the power supply mode is the second power supply mode and it is determined by the determination unit that the operation state of the electric motor is the regeneration state. 1. A power source system for use in a vehicle that includes an electric motor , the power source system comprising:a power source device; anda control device that controls the power source device, wherein: a main power source,', 'an auxiliary power source, and', 'a switching circuit configured to switch a power supply mode between a first power supply mode, in which power is supplied to a drive circuit for the electric motor by only the main power source, and a second power supply mode, in which power is supplied to the drive circuit utilizing both the main power source and the auxiliary power source; and, 'the power source device includes'} a switching circuit control unit that controls the switching circuit on the basis of a value that matches power consumption by the drive circuit,', 'a determination unit that determines whether an operation state of the electric motor is a regeneration state or a power-running state, and', 'a limitation unit that limits power to be supplied to the drive circuit when the power supply mode is the second power supply mode and it is determined by the determination unit that the operation state of the electric motor is the regeneration state., 'the control ...

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Номер записи: 83
10-03-2022 дата публикации

ADJUSTMENT SUPPORT DEVICE, SERVO DRIVER, CONTROL PARAMETERS ADJUSTMENT METHOD FOR PLURALITY OF SERVO MOTORS, AND PROGRAM

Номер: US20220077800A1
Автор: NAKAJIMA Kenji, ONO Yasushi
Принадлежит:

A technique enables control parameter adjustment with a more accurate estimated inertia ratio for multiple servomotors. An adjustment support apparatus () supports adjustment of inertia ratios as control parameters for servo drivers () that drive multiple servomotors. The adjustment support apparatus () includes an inertia ratio obtainer () that obtains inertia ratios estimated by inertia ratio estimators () included in the servo drivers () and an inertia ratio setting control unit () that synchronizes inertia ratio settings and updates between the servo drivers (). 1. An adjustment support apparatus for supporting adjustment of control parameters for a plurality of servomotors , the apparatus comprising:a parameter obtainer configured to obtain a parameter including an estimated inertia ratio for a load drivable by the plurality of servomotors; anda parameter setting controller configured to allow setting of a parameter including an inertia ratio for controlling the plurality of servomotors,wherein after the parameter obtainer obtains the estimated inertia ratio for each of the plurality of servomotors, the parameter setting controller allows the obtained inertia ratio to be set for each of the plurality of servomotors.2. The adjustment support apparatus according to claim 1 , whereinwhen the inertia ratio for one of the plurality of servomotors is estimated, the parameter setting controller allows gains and inertia ratios of the other servomotors of the plurality of servomotors to be set at an identical gain and an identical inertia ratio.3. The adjustment support apparatus according to claim 1 , further comprising:a validity determination unit configured to determine validity of the estimated inertia ratio obtained by the parameter obtainer.4. The adjustment support apparatus according to claim 1 , whereinthe plurality of servomotors drive a load including axes with possible axis interference with each other.5. A servo driver for controlling a servomotor included ...

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Номер записи: 84
10-03-2022 дата публикации

MAGNETIC FLUX ESTIMATE

Номер: US20220077801A1
Автор: DEVOS Thomas, Jebai Al Kassem, MALRAIT François
Принадлежит: Schneider Toshiba Inverter Europe SAS

Examples include a method for controlling a synchronous motor using a variable speed drive. The motor includes a permanent magnet rotor generating a magnetic flux. The method includes applying a predefined electrical command signal to the motor and estimating a motor speed in response to the applying of the predefined electrical command signal. The method also includes reaching a desired estimated motor speed and, in response to reaching the desired estimated motor speed, estimating a parameter related to the magnetic flux of the permanent magnet rotor. The method further includes recording the estimated parameter. 1. A method for controlling a synchronous motor using a variable speed drive , the motor comprising a permanent magnet rotor generating a magnetic flux , the method comprising:applying a predefined electrical command signal to the motor;estimating a motor speed in response to the applying of the predefined electrical command signal;reaching a desired estimated motor speed;in response to reaching the desired estimated motor speed, estimating a parameter related to the magnetic flux of the permanent magnet rotor; andrecording the estimated parameter.2. The method according to claim 1 , wherein the estimating of the motor speed comprises monitoring motor currents.3. The method according to claim 1 , wherein the predefined electrical command signal is a predefined voltage signal.4. The method according to claim 1 , wherein the parameter is the magnetic flux of the permanent magnet rotor.5. The method according to claim 1 , wherein reaching the desired estimated motor speed results from adapting a value of the predefined electrical command signal iteratively.6. The method according to claim 1 , wherein estimating the parameter related to the magnetic flux of the permanent magnet rotor results from adapting a value of the parameter iteratively.7. The method according to claim 1 , wherein the desired estimated motor speed is within a reference speed range or ...

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Номер записи: 85
10-03-2022 дата публикации

CONTROL DEVICE

Номер: US20220077802A1
Автор: AKATSUKA Hisaya, Kojo Takahiro, NITTA Shingo, TOKO Takahiro
Принадлежит:

A control device controls a motor which includes a first stator coil and a second stator coil insulated from each other. The control device includes: a first drive circuit that is connected to the first stator coil; a second drive circuit that is connected to the second stator coil; a first processing circuit; and a second processing circuit. The first processing circuit increases an output of an integral element according to the number of control systems when the second processing circuit performs a process of switching a first use and operation process to a second use and operation process. 1. A control device that controls a motor which turns turning wheels and which includes a first stator coil and a second stator coil insulated from each other , the control device comprising:a first drive circuit that is connected to the first stator coil;a second drive circuit that is connected to the second stator coil;a first processing circuit; anda second processing circuit,wherein the control device operates the first drive circuit and the second drive circuit,wherein the first processing circuit and the second processing circuit are able to communicate with each other,wherein the first processing circuit performs a first operation amount calculating process of calculating a first amount of operation for feedback-controlling a first convertible angle, which is able to be converted to a turning angle of the turning wheels and which is based on a detection value from a first angle sensor, such that the first convertible angle becomes a target angle, a process of operating the first drive circuit based on the first amount of operation, and an output process of outputting the first amount of operation to the second processing circuit,wherein the second processing circuit performs a second operation amount calculating process of calculating a second amount of operation for feedback-controlling a second convertible angle, which is able to be converted to a turning angle of the ...

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Номер записи: 86
10-03-2022 дата публикации

MOTOR APPARATUS FOR A SWITCH DRIVE OF AN ELECTRICAL SWITCH

Номер: US20220077804A1
Автор: Hilker Thomas, JAENICKE LUTZ-RUEDIGER
Принадлежит:

A motor apparatus for a switch drive of an electric switch has an electric motor and a control apparatus for controlling the electric motor. The control apparatus has a power supply device for the electrical power supply of the electric motor. The electric power supply has a rectifier unit, a voltage measurement unit for detecting the supply voltage or a rectifier output voltage of the rectifier unit, a switch unit for generating a drive voltage for the electric motor from the supply voltage or from the rectifier output voltage, and a control unit for controlling the switch unit as a function of the supply or rectifier output voltage detected. Accordingly, the motor apparatus has a motor housing which, besides the electric motor, houses part of the power supply device and/or at least part of the control unit. 110-. (canceled)11. A motor apparatus for a switch drive of an electrical switch , the motor apparatus comprising:an electric motor;a controller for controlling said electric motor, said controller containing an energy supply for supplying electrical energy to said electric motor, said energy supply including:a rectifier;a voltage measurer for capturing a supply voltage or a rectifier output voltage of said rectifier;a switching system for generating a drive voltage for said electric motor from the supply voltage or from the rectifier output voltage;a supply controller for driving said switching system depending on the supply voltage or the rectifier output voltage; anda motor housing, which in addition to said electric motor houses at least a part of said energy supply and/or at least a part of said supply controller.12. The motor apparatus according to claim 11 , wherein said energy supply supplies the electrical energy to said electric motor and to said supply controller.13. The motor apparatus according to claim 12 , wherein said energy supply for supplying the electrical energy to said supply controller has:a further voltage measurer for capturing the ...

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Номер записи: 87
22-05-2014 дата публикации

METHOD FOR ESTIMATING A FREQUENCY OF A HARMONIC IN AN AC CURRENT PASSING TO/FROM AN AC MACHINE

Номер: US20140139174A1
Автор: SHI Dongfeng
Принадлежит: OPTIMIZED SYSTEMS AND SOLUTIONS LIMITED

A method for estimating a frequency of a harmonic in an AC current passing to/from an AC machine. The method includes observing an AC current passing to/from an AC machine that includes a stator and a rotor; measuring phase fluctuations in the observed AC current; and using the measured phase fluctuations to estimate a frequency of a harmonic in the AC current. The method includes using the estimated frequency of the harmonic in the observed AC current to estimate a speed of the rotor of the AC machine. The method may be implemented by a controller, which may include a PC and/or a DSP. 1. A method for estimating a frequency of a harmonic in an AC current passing to/from an AC machine , the method including:observing an AC current passing to/from an AC machine that includes a stator and a rotor;measuring phase fluctuations in the observed AC current; andusing the measured phase fluctuations to estimate a frequency of a harmonic in the AC current.2. A method according to claim 1 , wherein measuring phase fluctuations in the observed AC current includes measuring phase fluctuations in the observed AC current so as to obtain a phase fluctuation time series having a plurality of discrete elements claim 1 , wherein each discrete element of the phase fluctuation time series represents a phase fluctuation in the AC current as measured at a different time.3. A method according to claim 1 , wherein measuring each phase fluctuation in the observed AC current includes claim 1 , respectively:converting an observed AC current into a vector representing the observed AC current in a 2D reference frame; andmeasuring a difference in phase between the vector representing the observed AC current and a vector representing a reference AC current in the 2D reference frame.4. A method according to claim 1 , wherein using the measured phase fluctuations to estimate a frequency of a harmonic in the AC current includes:converting the measured phase fluctuations into a frequency domain;using ...

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Номер записи: 88
05-03-2015 дата публикации

DEVICE AND METHOD FOR CONTROLLING A FAN OF A DISPLAY

Номер: US20150066211A1
Автор: Chou Bor-Bin
Принадлежит: YOUNG LIGHTING TECHNOLOGY INC.

A device is suitable for controlling a rotation-speed of a fan of a display. The device includes a temperature sensor for sensing a current temperature of the display, a memory for storing the current temperature of the display and a first and a second setting-temperature and a control module coupled to the temperature sensor and the memory and adapted to couple to the fan of the display. The control module compares the current temperature of the display with the first and the second setting-temperatures and judging the variation of the current temperature of the display to control the rotation-speed of the fan. If the control module judges out the current temperature of the display sensed by the temperature sensor rises, the control module raises the rotation-speed of the fan when the rotation-speed of the fan is lower than a maximum rotation-speed. 1. A device for controlling a fan of a display , suitable to control a rotation-speed of the fan and the device comprising:a temperature sensor, for sensing a current temperature of the display;a memory, for storing the current temperature of the display, a first setting-temperature and a second setting-temperature; anda control module, coupled to the temperature sensor and the memory, and adapted to be coupled to the fan of the display for comparing the current temperature of the display with the first setting-temperature, comparing the current temperature of the display with the second setting-temperature, and judging a variation of the current temperature of the display to control the rotation-speed of the fan, wherein if the control module judges out the current temperature of the display sensed by the temperature sensor rises, the control module raises the rotation-speed of the fan when the rotation-speed of the fan is lower than a maximum rotation-speed.2. The device as claimed in claim 1 , wherein if the control module judges out the current temperature of the display is higher than the first setting-temperature ...

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Номер записи: 89
01-03-2018 дата публикации

MONITORING HEALTH OF ELECTRICAL EQUIPMENT

Номер: US20180062553A1
Автор: Adenwala Fatema S., Chin Siew Wen, NARKHEDE Ravindra V., Van Hoang Tran
Принадлежит: Intel Corporation

Techniques for monitoring the health of a device comprising a motor or generator are described. An apparatus to monitor the health of the device includes a plurality of sensors to detect root-mean-square (RMS) current values for a plurality of stator windings of the device. The apparatus also includes a processor to receive the RMS current values from the plurality of sensors and compute a fault indicator based on the RMS current values. The fault indicator represents a level of current imbalance between the plurality of stator windings due to winding faults. 1. A device comprising a motor or generator and an apparatus to monitor the health of the device comprising:a plurality of stator windings of the device;a plurality of sensors to detect root-mean-square (RMS) current values for each of the plurality of stator windings of the device; anda processor to:receive the RMS current values from the plurality of sensors;convert the RMS current values to peak current values;determine a modified direct current, Id, and a modified quadrature current, Iq, based on the peak current values and using a predetermined phase angle in place of an actual measured phase angle;compute a fault indicator based on the modified direct current, Id, and the modified quadrature current, Iq, wherein the fault indicator represents a level of current imbalance between the plurality of stator windings due to winding faults; andtransmit the fault indicator to a display device.2. The apparatus of claim 1 , wherein the device comprises three stator windings and the plurality of sensors comprises three sensors to detect the RMS current values for each of the three stator windings.3. (canceled)4. The apparatus of claim 1 , wherein the device is a motor and the RMS current values are detected periodically at a sampling rate that is lower than the frequency of an AC current driving the motor.5. (canceled)7. The apparatus of claim 1 , wherein the health of the device is to be displayed as a circle with ...

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Номер записи: 90
02-03-2017 дата публикации

Method For Tuning A Motor Drive Using Frequency Response

Номер: US20170063268A1
Автор: da Silva Aderiano M., Fast Brian, Holt Michelle E., Miklosovic Robert J.
Принадлежит:

An improved system for tuning a motor controller is disclosed. The controller gains are initially set based on the measured frequency response for the controlled system. A desired level of performance is defined by setting a desired phase margin and a desired gain margin to be observed in the frequency response. An improved method of determining the frequency response provides for a reduced computational intensity. The initial tuning routine uses the frequency response to set not only controller gains, but also settings for filters in the control module. Having obtained the desired level of performance from the initial tuning, the motor drive executes an adaptive tuning routine while controlling the motor. The adaptive tuning routine tracks changes in the operating performance and adjusts the filter settings or the controller gains to return operation to within the desired level of performance while the motor continues to operate. 1. A method for tuning performance of a motor drive during operation of a motor operatively connected to the motor drive , wherein the motor controls motion of a mechanical load coupled to the motor , the method comprising the steps of:measuring a response signal corresponding to operation of the motor during operation of the motor;storing a plurality of values of the response signal in a memory device of the motor drive;measuring a command signal corresponding to a desired operation of the motor during operation of the motor,storing a plurality of values of the command signal in the memory device of the motor drive;generating a first frequency response within the motor drive as a function of the plurality of values of the response signal;generating a second frequency response within the motor drive as a function of the plurality of values of the command signal;identifying a resonant frequency in the first frequency response having a magnitude greater than the magnitude of the other frequencies in the first frequency response;identifying a ...

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Номер записи: 91
02-03-2017 дата публикации

System And Method For Improved Motor Drive Tuning

Номер: US20170063269A1
Автор: Chaffee Mark, Fast Brian, Miklosovic Robert J.
Принадлежит:

An improved system for controlling operation of a motor with a motor drive is disclosed. The motor drive includes a control module having an inner control loop operable to generate a torque reference signal and a load observer operable to generate an estimate of the torque present on the motor. The torque estimate is summed with the torque reference signal to generate a modified torque reference. The bandwidth of the load observer is set wide enough to generate the estimated torque over a desired operating range of the motor. The control module may also include a low pass filter and at least one tracking notch filter. The low pass filter suppresses vibrations at high frequencies, and the tracking notch filter suppresses resonances present at frequencies above the bandwidth of the load observer and within the pass band of the low pass filter. 1. A method for controlling operation of a motor operatively connected to a motor drive , the method comprising the steps of:determining a bandwidth for a load observer executable in the motor drive, wherein the bandwidth is greater than or equal to an expected torque response generated from a load operatively connected to the motor;reading a motor inertia value from a memory of the motor drive, wherein the motor inertia value corresponds to an inertia value for the motor when no load is connected to the motor; an inner control loop generating a first torque reference signal corresponding to a desired operation of the motor;', 'the load observer generating an estimated torque signal corresponding to the load present on the motor;', 'a summing junction combining the first torque reference signal and the estimated torque signal to generate a second torque reference signal;', 'at least one filter configured to receive the second torque reference signal as an input and provide a filtered torque reference signal as an output; and', 'an inertia sealing factor set equal to the motor inertia value, wherein the inertia scaling factor is ...

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Номер записи: 92
04-03-2021 дата публикации

ELECTRIC MOTOR CONTROL DEVICE

Номер: US20210067069A1
Автор: Iezawa Masahiro, KIMPARA Yoshihiko, KITAGAWA Jun, MATSUURA Daiki, Ogawa Yasufumi
Принадлежит: Mitsubishi Electric Corporation

An electric motor control device such that a rotation angle correction value used in a phase correction of an angle sensor rotation angle signal can be calculated with high accuracy is obtained. The electric motor control device includes a rotation angle correction amount calculation unit () that, based on a rotation angle signal for an alternating current electric motor () output from an angle sensor () and a current detection signal for the alternating current electric motor () output from a current detection unit (), calculates a rotation angle correction amount to correct a rotation angle error between the rotation angle signal and a magnetic pole position of the alternating current electric motor (), wherein the rotation angle correction amount calculation unit (), based on a current detection signal when a short circuit is caused between winding terminals of the alternating current electric motor (), calculates at least either one rotation angle correction amount of a direct current component rotation angle correction amount and an alternating current component rotation angle correction amount. 1. An electric motor control device , comprising:an electric motor control circuit that controls an inverter that supplies power to an alternating current electric motor, and into which a rotation angle signal for the alternating current electric motor output from an angle sensor and a current detection signal for the alternating current electric motor output from a detector are input;a rotation angle correction amount calculator that, based on the rotation angle signal and the current detection signal, calculates a rotation angle correction amount to correct a rotation angle error between the rotation angle signal and a magnetic pole position of the alternating current electric motor; anda rotation angle corrector that stores the rotation angle correction amount calculated by the rotation angle correction amount calculator, reads the stored rotation angle correction ...

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Номер записи: 93
12-03-2015 дата публикации

DYNAMIC RECONFIGURATION-SWITCHING OF WINDINGS IN AN ELECTRIC MOTOR

Номер: US20150069947A1
Автор: BATES Allen K., BUI Nhan X., HANCOCK REED A., Winarski Daniel J.
Принадлежит: INTERNATIONAL BUSINESS MACHINES CORPORATION

Dynamic reconfiguration-switching of motor windings is optimized between winding-configurations. Acceleration is traded off in favor of higher velocity upon detecting an electric motor is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant. The total back electromotive force (BEMF) is prohibited from inhibiting further acceleration to a higher angular-velocity. 1. A method for switching motor windings within an electric motor using a processor device , the method comprising:optimizing a dynamic reconfiguration-switching of a plurality of motor windings between a plurality of winding-configurations for trading off acceleration in favor of higher velocity upon detecting the electric motor is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant thereby preventing a total back electromotive force (BEMF) from inhibiting further acceleration to a higher angular-velocity; andusing m simultaneous-linear equations, having m number of unknown variables, for determining a plurality of voltage constants, the optimal time, and the optimal angular-velocity for the dynamic reconfiguration-switching.2. The method of claim 1 , further including performing the dynamic reconfiguration-switching between the plurality of motor windings using one of a wye connection and a delta connection system for the electric motor.3. The method of claim 1 , further including performing the dynamic reconfiguration-switching between the plurality of winding-configurations in a successive order when a velocity sensor detects the electric motor is at the optimal angular-velocity for switching the torque constant and the voltage constant.4. The method of claim 1 , further including trading off angular-acceleration for a greater angular-velocity as speed of the electric motor is increased whereby the torque constant claim 1 , the voltage constant claim 1 , and the angular-acceleration correspondingly decrease ...

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Номер записи: 94
29-05-2014 дата публикации

APPARATUS AND METHOD FOR MEASURING POSITION DEVIATION OF ROTOR OF PERMANENT MAGNET SYNCHRONOUS MOTOR

Номер: US20140145654A1
Автор: LI Jin-Geng, ZHANG Jia-Min
Принадлежит: DELTA ELECTRONICS, INC.

An apparatus for measuring a position deviation of a rotor of a permanent magnet synchronous motor includes a control unit, a power transformation unit, a rotor position estimator and a calculation unit. The control unit receives a d-axis DC voltage signal and a q-axis AC voltage signal and receives an initial value of the rotor position and a high-frequency signal to output a three-phase command signal. The power transformation unit receives the three-phase command signal and outputs a three-phase control signal for controlling the motor. The rotor position estimator receives a three-phase current feedback signal corresponding to an operation of the motor and generates an estimation value of the rotor position. The calculation unit performs calculation to the initial value and the estimation value to generate a deviation value of the rotor position. Moreover, a method for measuring the position deviation is also disclosed herein. 1. An apparatus for measuring a position deviation of a rotor of a permanent magnet synchronous motor (PMSM) , comprising:a control unit configured for receiving a d-axis DC voltage signal and a q-axis AC voltage signal of a rotary coordinate system and configured for receiving an initial value of the rotor position and a high-frequency signal to output a three-phase command signal;a power transformation unit configured for receiving the three-phase command signal and outputting a three-phase control signal for controlling the motor;a rotor position estimator configured for receiving a three-phase current feedback signal corresponding to an operation of the motor and generating an estimation value of the rotor position; anda calculation unit configured for performing calculation to the initial value and the estimation value of the rotor position to generate a deviation value of the rotor position.2. The apparatus of claim 1 , wherein the control unit further comprises:a rotary-to-stationary coordinate transformation unit configured for ...

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Номер записи: 95
08-03-2018 дата публикации

METHOD FOR AUTOMATICALLY IDENTIFYING RESONANCE

Номер: US20180067086A1
Автор: Knaack Chris, Tian Gang
Принадлежит:

A resonance estimation system implements resonance detection methods that can obtain accurate estimates of a motion system's resonance and amplitude without the need for a high-resolution encoder or high-frequency sampling. The system solves for resonance information by removing the slow motion dynamics and fast torque control dynamics from the measured speed transfer function in order to obtain resonance transfer function. Smoothing functions are applied to the obtained resonance frequency response data to remove spikes and obtain relatively smooth gain and phase curves for the resonance frequency response. The system then applies a searching algorithm to determine the locations of the phase peaks in the phase curve data, and uses these phase peak locations to locate the gain peaks in the gain curve data, which correspond to the resonance frequencies and amplitudes. This approach allows the gain peaks to be located even when analyzing non-ideal gain curves that are degraded by noise. 1. A system , comprising:a memory; a torque command generator configured to generate torque command data;', 'a noise injection component configured to inject a noise signal into the torque command data to yield noise-injected torque command data;', 'a velocity monitoring component configured to obtain speed data representing a speed of a motion system over time in response to a torque command signal generated based on the noise-injected torque command data; and', 'a resonance determination component configured to generate, based on the speed data and the noise-injected torque command data, resonance frequency response data comprising resonance gain frequency response data and resonance phase frequency response data, and to determine a resonance frequency of the motion system based on a determined frequency of a phase peak in the resonance phase frequency response data., 'a processor configured to execute components stored on the memory, the components comprising2. The system of claim 1 ...

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Номер записи: 96
10-03-2016 дата публикации

CONTROL DEVICE AND SPEED REDUCER SYSTEM

Номер: US20160070247A1
Автор: HIRANO Yosei, Nakamura Koji, OHISHI Kiyoshi, SATO Masataka, YOKOKURA Yuki
Принадлежит:

This application discloses a control device for controlling a motor configured to drive an oscillatory cyclo-speed reducer including an oscillatory gear portion formed with at least one hole at an eccentric position. The control device includes an angle acquirer for acquiring input information about an input rotational angle indicating a rotational angle of the motor, an estimator for estimating an angular error between the input rotational angle and an output rotational angle indicating a rotational angle of the oscillatory cyclo-speed reducer based on a quantity of the hole(s) and a corrector for determining a compensation current value in correspondence to the angular error and setting a magnitude of a current to be supplied to the motor by correcting a command current value using the compensation current value. 1. A control device for controlling a motor configured to drive an oscillatory cyclo-speed reducer including an oscillatory gear portion which is provided with at least one hole at an eccentric position , comprising:an angle acquirer configured to acquire input information about an input rotational angle which indicates a rotational angle of the motor;an estimator configured to estimate an angular error between the input rotational angle and an output rotational angle indicating a rotational angle of the oscillatory cyclo-speed reducer based on a hole number which indicates a quantity of the at least one hole; anda corrector configured to determine a compensation current value in correspondence to the angular error, the corrector using the compensation current value to correct a command current value and set a magnitude of a current, which is supplied to the motor.2. The control device according to claim 1 ,wherein the angular error is an axial torsional vibration.3. The control device according to claim 1 ,wherein the angular error is a vibration component caused by the at least one hole.4. The control device according to claim 1 ,wherein the estimator ...

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Номер записи: 97
09-03-2017 дата публикации

ROTARY STEERABLE ROLL STABILIZED CONTROL SYSTEM

Номер: US20170067332A1
Автор: Alturbeh Hamid, Bayliss Martin Thomas, Whidborne James Ferris
Принадлежит:

A rotary controlled system includes first and second alternators electrically connected to one another via a DC voltage bus. The alternators may optionally be further mechanically connected to one another via corresponding rotationally coupled components (such as rotationally coupled stators). A first field oriented controller is electrically connected with the first alternator and configured to cause the first alternator to provide a constant DC voltage to the voltage bus. A second field oriented controller is electrically connected with the second alternator and configured to receive electrical power from the voltage bus and cause the second alternator to provide servo angular position control of the rotationally coupled components. The system may be employed in a downhole rotary steerable tool to provide servo angular position control of a roll stabilized housing. 1. A downhole tool comprising:a downhole tool collar configured for coupling with a drill string such that the tool collar rotates with the drill string;a roll stabilized housing deployed in and rotationally decoupled from the tool collar; andan electronic controller deployed in the roll stabilized housing, the electronic controller including first and second field oriented controllers, the first field oriented controller configured to provide a constant DC voltage to a voltage bus, the second field oriented controller configured to receive power from the voltage bus and provide servo angular position control for the roll stabilized housing.2. The downhole tool of claim 1 , further comprising first and second turbine alternators deployed in the tool collar claim 1 , the first field oriented controller electrically connected with the first turbine alternator and the second field oriented controller electrically connected with the second turbine alternator.3. The downhole tool of claim 2 , wherein:the first field oriented controller is configured to cause the first turbine alternator to provide the ...

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Номер записи: 98
17-03-2022 дата публикации

MOTOR OUTPUT STABILIZING CIRCUIT AND METHOD

Номер: US20220085742A1
Автор: Chen Li-Wei, Chien Shih-Hai
Принадлежит:

A motor output stabilizing circuit and a method are provided. A sensor senses a positive voltage and a negative voltage that are generated with a change in magnetic field strength of a motor of which a rotor is rotating. A comparator compares the positive voltage with the negative voltage to output a 1. A motor output stabilizing circuit for a motor , wherein the motor is connected to a motor driver circuit for driving the motor , the motor output stabilizing circuit comprising:a sensor disposed adjacent to the motor and configured to sense a positive voltage and a negative voltage that are generated with a change in magnetic field strength of the motor when a rotor of the motor rotates;a comparator connected to the sensor and configured to compare the positive voltage with the negative voltage to output a Hall signal;an average counter connected to the comparator, and configured to record a first time during which the Hall signal is at a first level, record a second time during which the Hall signal is at a second level that is different from the first level, average the first time and the second time to obtain an averaged time value, and output an averaged time signal according to the averaged time value; anda motor controller circuit connected to the average counter and the motor driver circuit, and configured to control the motor driver circuit to drive the motor according to the averaged time signal, such that peak values of waveforms of a current signal outputted by the motor are equal to each other or approach each other.2. The motor output stabilizing circuit according to claim 1 , wherein the average counter calculates the averaged time value of the first time and the second time of a waveform of one cycle of the Hall signal claim 1 , or calculates the averaged time value of first times and second times of waveforms of a plurality of cycles of the Hall signal claim 1 , and one of the first time and the second time is a working period of the waveform or each ...

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Номер записи: 99
10-03-2016 дата публикации

MULTI-PHASE MOTOR CONTROL APPARATUS AND ELECTRIC POWER STEERING APPARATUS USING THE SAME

Номер: US20160072421A1
Автор: SUGAWARA Takayoshi
Принадлежит: NSK LTD.

A multi-phase motor control apparatus that reduces the occurrence of the vibrations and the noises by setting the shift amount per time more finely after realizing a reduction in processing ability of a CPU by using a one-shunt type current detection circuit and an electric power steering apparatus using the same. The apparatus includes a PWM-signal generating section that generates plural second each-phase PWM-signals within two control periods based on the current estimation value and the carrier signal, and in a case that a phase shift amount of a predetermined phase in a just before control period is zero and a phase shift amount of a predetermined phase in a present control period is not zero, the phase shift control section gradually increases the phase shift amount from zero in the present control period and a next control period, and uses the second each-phase PWM-signals in the next control period. 1. A multi-phase motor control apparatus comprising:a driving section comprising pairs of upper-stage arm switching elements and lower-stage arm switching elements, and driving a multi-phase motor;a single type current detection circuit detecting current values of said multi-phase motor;a PWM-signal generating section generating plural first each-phase PWM-signals within two control periods based on said current values detected by said current detecting circuit and a carrier signal;a phase shift control section shifting a first PWM-signal of a predetermined phase, which is generated in said PWM-signal generating section, by gradually changing a phase shift amount within two control periods, and outputting said shifted first PWM-signal to said driving section; anda current detection observer estimating a current estimation value of said multi-phase motor based on said current values detected by said current detection circuit;wherein said PWM-signal generating section generates plural second each-phase PWM-signals within two control periods based on said current ...

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Номер записи: 100