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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 16904. Отображено 100.
05-01-2012 дата публикации

Rotary electric machine improved to carry out load-dump protection

Номер: US20120001598A1
Автор: Harumi Horihata, Hideaki Nakayama, Yoshihide ITOH
Принадлежит: Denso Corp

In a rotary electric machine, a load-dump protector turns on a switching element as a low-side rectifying element for at least one of plural-phase stator windings when the output voltage exceeds a first threshold voltage due to load dump. The load dump protector determines a turnoff timing of the switching element as the low-side rectifying element for the at least one of the plural-phase stator windings after the output voltage, which exceeded the first threshold voltage once, falls below a second threshold voltage. The second threshold voltage is set to be lower than the first threshold voltage. The load dump protector turns off, at the determined turnoff timing, the switching element as the low-side rectifying element for the at least one of the at least two-phase stator windings.

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Номер записи: 1
16-02-2012 дата публикации

Method for operating a polyphase machine having a pulse-width-modulated inverter

Номер: US20120038295A1
Автор: Daniel Raichle, Gunther Goetting, Martin Elsenhardt
Принадлежит: ROBERT BOSCH GMBH

A method for operating a polyphase machine having a pulse-width-modulated inverter, having the steps: determining a setpoint current value respectively for a current in the longitudinal direction and/or the transverse direction based on a specified torque, ascertaining a setpoint voltage value respectively for a voltage in the longitudinal direction and/or the transverse direction with the aid of the setpoint current value and/or of an actual current value determined at the pulse-width-modulated inverter, controlling and/or regulating the polyphase machine corresponding to the ascertained setpoint voltage value. In this context it is provided that, in addition, using a model, a model value is determined respectively for the voltage in the longitudinal direction and/or the transverse direction, the difference between the setpoint voltage value and the model value is ascertained, and in response to the exceeding of a specifiable maximum difference, an error signal is triggered.

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Номер записи: 2
15-03-2012 дата публикации

Brushless motor control device and brushless motor system

Номер: US20120062157A1
Автор: Hiroyuki Ota, Ippei Suzuki, Junichi Noda, Yuukou Nojiri
Принадлежит: Hitachi Car Engineering Co Ltd

Provided are a brushless motor control device and a brushless motor system capable of preventing impossibility of intended control of a brushless motor resulting from false recognition that the brushless motor is in operation in spite of stoppage of the brushless motor. A brushless motor control unit calculates a voltage instruction, representing voltages to be applied to the brushless motor, according to a control instruction supplied from an upper control device. A position error calculation unit calculates and estimates a position error between d-q-axes and dc-qc-axes as rotational coordinate axes by use of the voltage instruction outputted by the brushless motor control unit, current values acquired by a coordinate transformation unit and revolution speed for control of the brushless motor. A fault detection unit judges whether the brushless motor is faulty or not based on the position error calculated by the position error calculation unit.

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Номер записи: 3
22-03-2012 дата публикации

Transport System

Номер: US20120067673A1
Автор: Antti Kallioniemi
Принадлежит: Kone Corp

A power supply system of a transport system includes: a direct-current intermediate circuit; a motor bridge connected to the direct-current intermediate circuit, for supplying power between the direct-current intermediate circuit and the motor that moves the transport appliance; and also an energy storage and a direct-current converter based on indirect power transmission connected between the energy storage and the direct-current intermediate circuit, for controlling the power supply between the energy storage and the direct-current intermediate circuit. The direct-current converter based on indirect power transmission includes: a controllable solid-state switch, for disconnecting the power supply occurring from the energy storage.

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Номер записи: 4
22-03-2012 дата публикации

Method and system for determining deterioration of permanent magnets of electric apparatus

Номер: US20120068653A1
Автор: Akihiko Takahashi, Manabu Horiuchi, Yasushi Misawa
Принадлежит: Sanyo Denki Co Ltd

A method and a system for determining deterioration of permanent magnets of an electric apparatus to be inspected that facilitate determination without the need to remove the electric apparatus from a facility where it is installed. If the electric apparatus to be inspected is a three-phase linear motor, a current detector is used to acquire currents. A three-phase/two-phase conversion section converts the acquired currents into an α-axis current command and a β-axis current command. A locus of a current vector is computed based on the α-axis current command and the β-axis current command. A comparing and determining section compares the computed locus with a standard upper limit value stored in a storage means. If the number of times that the locus of the current vector exceeds the standard upper limit value exceeds a predetermined value, it is determined that the permanent magnets have been deteriorated.

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Номер записи: 5
05-04-2012 дата публикации

Control of an electrical machine

Номер: US20120081064A1
Автор: Mark Edward Leaver, Tuncay Celik, YU Chen
Принадлежит: Dyson Technology Ltd

A method of controlling an electrical machine that includes exciting a phase winding with a supply voltage, and freewheeling the phase winding when current in the phase winding exceeds a threshold. The threshold is then adjusted in response to changes in the supply voltage and/or the speed of the electrical machine. Additionally, a control system that implements the method and an electrical machine comprising the control system are described.

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Номер записи: 6
26-04-2012 дата публикации

Rotation Control Device for Working Machine

Номер: US20120101696A1
Автор: Tsutomu Udagawa
Принадлежит: HITACHI CONSTRUCTION MACHINERY CO LTD

A working machine swing control system is provided with an actual rotation speed sensor and a controller. The actual rotation speed sensor senses an actual rotation speed of a swing motor. The controller controls a drive torque of a drive unit, which drives the swing motor, such that a difference between a target rotation speed outputted from a swing control device and the actual rotation speed outputted from the actual rotation speed sensor is reduced to zero. The swing control system includes a correction device for correcting the target rotation speed outputted from the swing control device according to a work posture of working equipment and a work load on the working equipment.

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Номер записи: 7
10-05-2012 дата публикации

Engine load management for traction vehicles

Номер: US20120116627A1
Автор: Bradley Bailey, Jeffrey A. Brand, Matthew Hendrickson, Walter E. Earleson, William J. Tate
Принадлежит: Caterpillar Inc

An electric drive system includes a fuel-driven engine ( 202 ) driving an electrical power generator ( 204 ) that provides power to one or more electric drive motors ( 210 ). A method of load management in the electric drive system includes receiving an actual fuel signal, an engine speed ( 920 ) signal, a throttle position signal, a motor speed ( 712 ) signal, an intake air pressure, a barometric pressure signal, and an intake air temperature signal. These values are used to determine a torque limit. The torque limit is used to limit a torque command to the electric drive motors ( 210 ) such that the torque command is consistent with the operating capabilities of the engine ( 202 ).

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Номер записи: 8
24-05-2012 дата публикации

Diagnostic system and method for an electric power steering system

Номер: US20120130674A1
Автор: Christian E. Ross, Mohammad S. Islam, Paul Fisher
Принадлежит: Nexteer Beijing Technology Co Ltd

A diagnostic system and method for an electric power steering system are provided. The diagnostic system includes a first microprocessor that determines a first relative position value indicating the relative rotational position of the rotatable shaft at the first time based on the signals from first and second position sensors. A second microprocessor determines a second relative position value indicating the relative rotational position of the rotatable shaft at the first time based on the signals from third and fourth position sensors. The first microprocessor determines whether the first relative position value is an acceptable value based on a difference between the first relative position value and the second relative position value.

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Номер записи: 9
07-06-2012 дата публикации

Electric operating machine

Номер: US20120139456A1
Автор: Chikai Yoshimizu, Hideyuki Tanimoto, Hiromi Ozawa, Kazuhiko Funabashi, Nobuhiro Takano, Yoshihiro Hoshi
Принадлежит: HITACHI KOKI CO LTD

When a main switch ( 12 ) is turned ON, an electric operating machine ( 1 ) is put in the standby mode. With a trigger ( 13 ) being pulled in the standby mode, a power supply circuit ( 16 ) applies a voltage to a drive part ( 30 ). The power supply circuit ( 16 ) adjusts the voltage applied to the drive part ( 30 ) for a voltage corresponding to the pulling rate of the trigger ( 13 ). When the current running toward the drive part ( 30 ) exceeds the rated value of the drive part ( 30 ), the power supply circuit ( 16 ) automatically stops power supply to the drive part ( 30 ). On the other hand, when the output voltage of a battery ( 50 ) drops and the battery ( 50 ) is put in an overdischarge state, power supply to the drive part ( 30 ) is automatically stopped. When it is detected that the battery ( 50 ) undergoes an abnormal event, power supply to the drive part ( 30 ) is automatically stopped.

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Номер записи: 10
14-06-2012 дата публикации

Electric Power Steering Device

Номер: US20120145472A1
Автор: Daisuke Matsumoto, Yousuke Imamura
Принадлежит: NSK LTD

An an electric power steering device which, when an abnormality occurs in one phase of a three-phase brushless motor, permits continuous driving of the motor using the remaining two phases without deteriorating the steering feeling. When a power distribution abnormality of a drive system of one phase of respective phase coils has been detected by an abnormality detection section, an abnormal-time phase current instruction value for using the remaining two phase coils is calculated based on a steering assist electric current instruction value, and an electric motor is driven based on that abnormal-time phase current instruction value. At that time, when an electrical angle falls within an acceleration region, the abnormal-time phase current instruction value is increased or decreased for correction in order to accelerate rotation of the three-phase brushless motor in a steering direction.

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Номер записи: 11
12-07-2012 дата публикации

Vehicle

Номер: US20120175948A1
Автор: Yusuke Kamijo
Принадлежит: Toyota Motor Corp

A vehicle includes a power storage device, a motor generator, a converter for stepping up an output voltage from the power storage device, an inverter for driving the motor generator, and an ECU. The inverter includes switching elements. The switching elements have a characteristic that the withstand voltage of the switching elements decreases as the temperature of the inverter decreases. The ECU sets the stepped-up voltage, based on a temperature characteristic of the power storage device and a temperature characteristic of the inverter, so that the stepped-up voltage is increased within a range in which the stepped-up voltage does not exceed the withstand voltage. In this way, at low temperatures, deterioration of the power performance can be suppressed while the switching elements are protected.

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Номер записи: 12
12-07-2012 дата публикации

Determining stuck conditions for electric motors using inductive sensing

Номер: US20120176072A1
Автор: Cheng Yong Teoh, Edy Susanto, Foo Leng Leong
Принадлежит: Cheng Yong Teoh, Edy Susanto, Foo Leng Leong

A control system includes a position control module, a power control module, and a diagnostic module. The position control module applies a driving current for positioning a rotor of a motor at one of first and second positions. The power control module applies a first voltage to one of first and second phases of the motor to generate a first current after the position control module applies the driving current to position the rotor at the first position. The power control module applies a second voltage to one of the first and second phases to generate a second current after the position control module applies the driving current to position the rotor at the second position. The diagnostic module determines when the rotor is restricted from rotating based on the first and second currents.

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Номер записи: 13
19-07-2012 дата публикации

Door assist system controller and method

Номер: US20120180391A1
Автор: John Hayden, Michael Mckee, Nick Scholtes
Принадлежит: Control Solutions Inc

A controller for a door system and an associated method of operation for actuating a door. The controller may be electrically coupled with a motor, an outer door switch and an inner door switch. The controller, activates a motor assist and may maintain a desirable current supply to the motor assist. Determining a relative position of the door and determining whether movement of the door is obstructed is performed. The controller actuates the door to an appropriate position and determines whether door operation exceeds a maximum time threshold. The controller may be configured to deactivate the motor assist once the door reaches an appropriate position or the door operation exceeds the maximum time threshold.

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Номер записи: 14
09-08-2012 дата публикации

Actuator and position-detecting method therefor

Номер: US20120199767A1
Автор: Chikara Kitajima, Daisuke Kukita, Masakazu Mori, Seiya Shimada
Принадлежит: Seibu Electric and Machinery Co Ltd

In an actuator, an electric power supply to a position-detecting detector for an object to be driven can be carried out in a timely manner during a power failure to thereby suppress an electric power consumption in the position-detecting detector, whereby duration time of a power-failure compensation battery can be prolonged, and a variety of detectors can be selected and utilized without limitation in accordance with a use environment and usefulness. During the power failure, a switching means 40 establishes a linking state in which an input shaft 11 of a reduction mechanism 10 and a manual inputting means 30 are linked to each other. When the linking state is detected by a detecting means, an electric power is fed from a battery 80 to a rotation detector by a control section 70 , so that the control section 70 can obtain a displacement of the object to be driven, based on a signal output from the rotation detector. In a state in which the input shaft 11 of the reduction mechanism 10 can be manually rotated, the electric power is fed to the rotation detector. Thus, a useless consumption of the electric power of the battery 80 can be suppressed, and it is possible to suitably obtain the displacement of the object to be driven without an interruption even if the power failure happens.

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Номер записи: 15
09-08-2012 дата публикации

Method for monitoring a drive state of an electric motor

Номер: US20120200248A1
Автор: Roland Schleser
Принадлежит: ROBERT BOSCH GMBH

A method for monitoring a drive state, particularly a non-driven drive state of an electric motor, which is fed with energy using a bridge inverter having at least one half bridge, having detecting of a state of the at least one half bridge, detecting a property of a control signal for driving the at least one half bridge, and monitoring the drive state based on the detected state of the at least one half bridge and the detected property of the control signal.

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Номер записи: 16
16-08-2012 дата публикации

Regenerative braking safety system and method of use

Номер: US20120206071A1
Автор: Jason L. Hessler, Ronald T. Keen
Принадлежит: Beckman Coulter Inc

A centrifuge includes a regenerative braking safety system including an electrical system reversibly coupled to a power source. A motor is coupled to the electrical system. The motor is capable of driving a rotor using power delivered through the electrical system, and is further capable of supplying the electrical system with recovered energy. The recovered energy is electrical energy converted from kinetic energy of the rotor during regenerative braking of the motor. The safety system includes a power cut-off configured to disable the effect of regenerative braking of the motor when the electrical system is decoupled from the power source.

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Номер записи: 17
13-09-2012 дата публикации

Voltage regulator for dc motors

Номер: US20120229067A1
Автор: Franco Quagliata, Maurizio Barbero
Принадлежит: Individual

A voltage regulator for a pair of electric motors has an input for a signal indicative of the desired speed for the motors and a pulse width modulation control circuit device. A control module provides a conditioning signal to the control circuit to output to the motors a square wave voltage having a duty-cycle which varies according to a predetermined function of the signal applied to the input of the regulator. The control circuit device has first and second electronic solid state switches associated with the motor and controlled by the control module.

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Номер записи: 18
20-09-2012 дата публикации

Electric motor control apparatus

Номер: US20120235610A1
Автор: Ryo Nakamura, Yuya Hisano
Принадлежит: Mitsubishi Electric Corp

An electric motor control apparatus capable of controlling a motor normally regardless of failures is obtained without increased cost. The apparatus includes a position sensor failure determination unit which outputs a failure determination signal, and generates a first phase; a motor rotation speed calculator which operates based on the failure determination signal and position sensor signals; a phase command generator producing a phase command based on the first phase, the failure determination signal and rotation speed; an amplitude command generator that generates an amplitude command indicating magnitude of a driving signal for the motor, and an electrical energization unit that applies the driving signal to the motor based on the phase command and the amplitude command. Upon failure of a position sensor, the phase command generator generates the phase command using the first phase, and a second phase obtained based on the first phase and the rotation speed.

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Номер записи: 19
20-09-2012 дата публикации

Systems and methods for monitoring current in an electric motor

Номер: US20120235622A1
Автор: Brian A. Welchko, David Tang, Gregory S. Smith, Ronald W. Young, Silva Hiti
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Systems and methods are provided for monitoring current in an electric motor. An electrical system includes a (DC) interface, an electric motor, an inverter module coupled between the DC interface and the electric motor, a first current sensor between a first phase leg of the inverter module and a first phase of the electric motor to measure a first current flowing through the first phase of the electric motor, a second current sensor between the first phase leg and the DC interface to measure a second current flowing through the first phase leg, and a control module coupled to the first current sensor and the second current sensor. The control module is configured to initiate remedial action based at least in part on a difference between the first current measured by the first current sensor and the second current measured by the second current sensor.

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Номер записи: 20
18-10-2012 дата публикации

Rotating Electrical Machine Abnormal State Detection Method and Apparatus and Wind Driven Generating System Using the Same

Номер: US20120262131A1
Автор: Chun-Yao Lee
Принадлежит: CHUNG YUAN CHRISTIAN UNIVERSITY

A rotating electrical machine abnormal state detection apparatus is provided. The apparatus includes: a current signal acquisition unit, coupled to a rotating electrical machine, for acquiring a set of real-time current waveforms from the rotating electrical machine; a state characteristic database, pre-storing a plurality of abnormal state characteristics which respectively correspond to a plurality of abnormal states; and an abnormal state detection unit, coupled to the current signal acquisition unit and the state characteristic database, for performing signal analysis on the set of real-time current waveforms to produce a current state characteristic, and comparing the current state characteristic with the abnormal state characteristics pre-stored in the state characteristic database to determine the abnormal state of the rotating electrical machine.

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Номер записи: 21
08-11-2012 дата публикации

Method and device for operating a power tool

Номер: US20120280643A1
Автор: Heiko Roehm
Принадлежит: ROBERT BOSCH GMBH

In a method for operating a power tool having an electric motor which is supplied with operating current and operating voltage during the operation, a root-mean-square value of the power output of the electric motor is regulated upon exceeding a predefined limiting value of the electrical power output of the electric motor in such a way that it maximally reaches the limiting value.

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Номер записи: 22
15-11-2012 дата публикации

Reverse recovery current prevention device and motor driving apparatus

Номер: US20120286708A1
Автор: Motonobu Ikeda, Satoshi Yagi, Sumio Kagimura
Принадлежит: Daikin Industries Ltd

A reverse recovery current prevention device includes a full wave rectifier having a plurality of diodes, first and second diodes, a switch part and a switch control unit. The full wave rectifier rectifies a power source voltage from an alternating current power source inputted into first and second input terminals. The first and second diodes have anode terminals connected to the first and second input terminals, respectively. The switch part opens or shorts an electrical circuit between a negative-side output terminal of the full wave rectifier and each cathode terminal of the first and second diodes. The switch control unit prohibits the switch part from shorting the electrical circuit between the negative-side output terminal and each of the cathode terminals when a voltage between the negative-side output terminal and each of the cathode terminals is at or above a threshold.

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Номер записи: 23
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: 24
06-12-2012 дата публикации

Motor control device

Номер: US20120306426A1
Автор: Hidetoshi Ikeda, Kiyoshi Maekawa, Koichiro Ueda, Yoshihiro Marushita, Yuji Igarashi
Принадлежит: Mitsubishi Electric Corp

A motor control device includes: a feedforward computing section for computing a motion reference value and a feedforward driving force based on a motion command; a deviation compensation computing section for outputting a deviation compensation driving force by a control computation for reducing a control deviation; a driving-force command synthesizing section for outputting a driving-force command based on the feedforward driving force and the deviation compensation driving force; a reaction-force compensation computing section for computing a motion correction value based on a predetermined reaction-force reference value and the deviation compensation driving force; and a control-deviation computing section for computing the control deviation based on a deviation between the motion reference value and a motor motion detection value, and the motion correction value.

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Номер записи: 25
06-12-2012 дата публикации

Electricity Generation Device and Permanent-Magnet Electric Generator

Номер: US20120306462A1
Автор: Hitoshi Oyori, Yukio Shimomura
Принадлежит: IHI Aerospace Co Ltd, Sinfonia Technology Co Ltd

An electricity generation device includes a permanent-magnet electric generator with three or more phase windings each having an output terminal and connected to a neutral point, and bidirectional semiconductor switching circuits capable of interrupting connections between the respective phase windings and the neutral point. Each switching circuit allows current to flow in both directions. A gate signal generation circuit outputs to one of the switching circuits during a period including the time at which the AC voltage excited in the corresponding phase winding turns from positive to negative and during a period including the time at which the AC voltage excited in the corresponding phase winding turns from negative to positive. A startup gate signal output circuit outputs a startup gate signal to all of the bidirectional semiconductor switching circuits when the permanent-magnet electric generator is to be started.

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Номер записи: 26
17-01-2013 дата публикации

Converter for an electrical machine, controller and method for operating a converter

Номер: US20130015796A1
Автор: Christian SPINDELBERGER, Jürgen TANNHEIMER, Thomas Feichtinger, WOLFGANG Paul
Принадлежит: Magna E Car Systems GmbH and Co OG

A converter for an electrical machine having a plurality of phase lines for connecting the electrical machine. For each phase line the converter has a half-bridge with a first first semiconductor switch is configured to electrically connect at least one of the phase lines intermittently to a first supply line of the converter, and a second semiconductor switch configured to electrically connect the phase line intermittently to a second supply line of the converter. The converter is configured for operation in a first energy recovery limiting mode in which at least two of the first semiconductor switches are at least intermittently on simultaneously.

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Номер записи: 27
17-01-2013 дата публикации

Method Of Machine Condition Monitoring

Номер: US20130018603A1
Автор: Dorothea BOGATZKI, Oleksandr SOBOLYEV, Peter KÜPER
Принадлежит: MAN Diesel and Turbo SE

A method of machine condition monitoring, wherein at least one measured and/or calculated machine parameter is monitored during the operation of a machine, and wherein a change in the machine condition, particularly a critical operating state of the machine, is deduced when at least one monitored machine parameter reaches a limit value, and wherein at least one monitored machine parameter is monitored depending on at least one other machine parameter in defined operating point ranges of the machine, wherein a change in machine condition is deduced when at least one monitored machine parameter within a defined operating point range reaches at least one limit value individual to the operating point range.

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Номер записи: 28
14-03-2013 дата публикации

MOTOR CONTROL APPARATUS

Номер: US20130063064A1
Автор: FUJIWARA Hiroshi, Tazawa Toru
Принадлежит: Panasonic Corporation

There are provided a first notch filter disposed in a feedback control system, an oscillation extracting filter for outputting signal x containing an oscillation component, a second notch filter for inputting signal x, a notch control portion for changing a notch center frequency based on signal x and second notch filter output signal x, a notch depth control portion for changing a notch depth of the first notch filter based on signal x, and a control determining portion for carrying out control to operate either the notch control portion or the notch depth control portion. 1. A motor control apparatus for carrying out feedback control over a quantity of state of a motor or load , comprising:a first notch filter disposed in a feedback control system and a notch center frequency and a notch depth of the first notch filter being changeable;an oscillation extracting filter for extracting an oscillation component caused by machine resonance and outputting the oscillation component as an extracting oscillation signal;a second notch filter for inputting the extracting oscillation signal and a notch center frequency of the second notch filter being changeable;a notch control portion for changing the notch center frequency of the first notch filter and the notch center frequency of the second notch filter to decrease an amplitude of a second notch filter output signal based on the extracting oscillation signal and the second notch filter output signal;a notch depth control portion for changing the notch depth of the first notch filter based on the extracting oscillation signal; anda control determining portion for carrying out control to operate either the notch control portion or the notch depth control portion based on the extracting oscillation signal and the second notch filter output signal.2. The motor control apparatus according to claim 1 , wherein the oscillation extracting filter is a high pass filter for extracting a signal component having a predetermined ...

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Номер записи: 29
14-03-2013 дата публикации

Method and system for detecting faults in a brushless exciter

Номер: US20130063066A1
Автор: William Earl Fish
Принадлежит: General Electric Co

A method of operating an electrical machine is provided. The method includes the steps of providing a brushless excitation system including a diode rectifier having at least one diode, sensing heat energy generated by at least one resistor connected in parallel with the at least one diode, wirelessly transmitting a signal representative of the heat energy, detecting a deviation of generated heat energy from the at least one resistor, and generating a signal indicating an error if the deviation in generated heat energy exceeds a predetermined threshold.

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Номер записи: 30
28-03-2013 дата публикации

MOTOR DRIVE DEVICE, AND MOTOR DRIVE METHOD

Номер: US20130076284A1
Автор: Kishimoto Kenichi
Принадлежит: Panasonic Corporation

A motor drive device includes a drive controller for generating drive signal “trq”, a limiter for limiting a value of drive signal “trq” within a range, a limit value generator for generating limit value “lmt”, and a drive output section for generating an energizing signal in response to an output signal from the limiter. The limit value generator generates a comparison signal by adding offset value “ofs” to drive signal “trq” and updates limit value “lmt” based on a size relation between a value (trq+ofs) of the comparison signal and limit value “lmt”. 1. A motor drive device to control driving a motor in accordance with an external command , the motor drive device comprising:a drive controller for generating a drive signal to drive the motor;a limiter for liming a value of the drive signal within a range;a limit value generator for generating a limit value; anda drive output section for generating an energizing signal in response to an output signal from the limiter, and energizing a winding of the motor with the energizing signal,wherein the limit value generator generates a comparison signal by adding an offset value to the drive signal, and updates the limit value based on a size relation between a value of the comparison signal and the limit value.2. The motor drive device of claim 1 , wherein the offset value is a positive value claim 1 , and the limiter limits a value of the drive signal to be the limit value when the drive signal exceeds the limit value.3. The motor drive device of claim 2 , wherein the limit value generator uses a value of the comparison signal as a new limit value when the limit value is equal to or greater than the value of the comparison signal claim 2 , or generates a new limit value by adding a given value to the limit value when the limit value is smaller than the value of the comparison signal.4. The motor drive device of claim 3 , wherein the limit value generator has an upper limit value set therein that indicates an upper limit ...

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Номер записи: 31
11-04-2013 дата публикации

Current switch with automatic calibration

Номер: US20130088213A1
Автор: David PIERSON
Принадлежит: Veris Industries LLC

A current switch that can be reset when it is not powered automatically calibrates itself when the circuit monitored by the current switch is energized.

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Номер записи: 32
25-04-2013 дата публикации

MOTOR CONTROL METHOD AND MOTOR CONTROL APPARATUS FOR DENTAL HANDPIECE

Номер: US20130099710A1
Автор: Okamoto Hideki
Принадлежит: NAKANISHI INC.

The present invention relates to a motor control method for a dental handpiece provided with a motor that rotationally drives a cutting tool. The control method includes a step A of limiting the motor current to a first limit current I when the load torque applied to the cutting tool exceeds a preset limit torque value, and a step B of controlling the motor current to be equal to or lower than a second limit current, which is lower than the first limit current, when it is detected that the motor stops rotating. 18-. (canceled)9. A motor control apparatus for a dental handpiece , the dental handpiece having a motor that rotationally drives a cutting tool , the motor control apparatus comprising:a load torque detecting section that detects a load torque applied to the cutting tool;a rotational speed detecting section that detects a rotational speed of the motor; anda control section that controls the rotational speed and a motor current of the motor,wherein the control sectionlimits the motor current to a first limit current when the load torque detected by the load torque detecting section exceeds a preset limit torque value, andcontrols the motor current to be equal to or lower than a second limit current, which is lower than the first limit current, when the load torque exceeds the limit torque value, and the rotational speed detecting section detects that the motor stops rotating.10. The motor control apparatus for a dental handpiece according to claim 9 , wherein the control section stops power supply to the motor when the motor current becomes equal to or lower than the second limit current.11. The motor control apparatus for a dental handpiece according to claim 9 , wherein the control section makes the motor rotate in a reverse direction when the motor current becomes equal to or lower than the second limit current.12. The motor control apparatus for a dental handpiece according to claim 9 , wherein the control section makes the motor rotate in a reverse ...

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Номер записи: 33
02-05-2013 дата публикации

Motor driving apparatus

Номер: US20130106324A1
Автор: Joo Yul Ko
Принадлежит: Samsung Electro Mechanics Co Ltd

There is provided a motor driving apparatus in which when a voltage level of external power is lower than a reference voltage level, a voltage level boosted by a separately provided direct current (DC) to DC converter is selected and supplied to field effect transistors (FETs), such that driving of a motor does not stop even in the case in which the voltage level of the external power is lowered. The motor driving apparatus includes: a power selecting unit selecting one of a preset first power, and a second power having a voltage level different from that of the first power, according to a detected motor driving voltage signal; and a driving unit driving the motor by receiving the power selected by the power selecting unit; and a driving controlling unit providing driving signals for driving the driving unit.

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Номер записи: 34
09-05-2013 дата публикации

MOTOR CONTROLLER

Номер: US20130113409A1
Автор: FUJIWARA Hiroshi, NISHIZONO MASARU, Tazawa Toru
Принадлежит: Panasonic Corporation

There are provided: a plurality of notch filters which are arranged inside a control system for feedback-controlling a moving operation of a moving section of a motor and attenuate signal components having near frequencies with a notch frequency at a center in an input signal; a plurality of oscillation extracting filters which are set with different frequency bands as being corresponded to the respective notch filters and extract oscillating components in the set frequency bands from a speed detection signal; and a plurality of notch controlling sections which are arranged with respect to the respective oscillation extracting filters and control the notch frequencies of the corresponding notch filters so as to decrease amplitudes of the oscillating components extracted by the oscillation extracting filters. 1. A motor controller having a control system for feedback-controlling a moving operation of a motor moving section through use of a detected moving amount of the motor moving section , the motor controller comprising:a plurality of notch filters which are arranged inside the control system and attenuate signal components having near frequencies with a notch frequency at a center in an input signal;a plurality of oscillation extracting filters which are set with different frequency bands as being corresponded to the respective notch filters and extract oscillating components from the moving amount based upon the set frequency bands; anda plurality of notch controlling sections which are arranged with respect to the respective oscillation extracting filters and control the notch frequencies of the corresponding notch filters so as to decrease amplitudes of the oscillating components extracted by the oscillation extracting filters.2. The motor controller according to claim 1 , wherein each of the notch controlling sections starts control of the notch frequency of the corresponding notch filter when the amplitude of the oscillating component extracted by the ...

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Номер записи: 35
16-05-2013 дата публикации

Power Conversion Device and Temperature Rise Calculation Method Thereof

Номер: US20130119912A1
Автор: Ayano Hideki, Ishikawa Katsumi, Kominami Tsutomu, Kunihiro Mami, Ogawa Kazutoshi
Принадлежит: HITACHI LTD.

A temperature rise of a semiconductor switching element, which is part of a power conversion device such as an inverter, is estimated by an extremely simple method to assess the degradation and remaining lifetime of the semiconductor switching element. 1. A power conversion device having an inverter main circuit in which a switching element is mounted , a gate driver that drives the switching element , a PWM control unit that generates , based on a triangular wave carrier and a voltage command value , an ON/OFF control signal used to drive the switching element , and a control circuit that calculates the voltage command value , the power conversion device comprising:a means for estimating a current value in each output phase from a current command value in each control cycle in which the switching element is controlled so that the switching element is turned on or off;a means for calculating an ON loss and an OFF loss of the switching element as a function of the estimated current value;a means for determining a switching element to be brought into conduction according to a polarity of the current command value;a means for calculating, from the voltage command value in each output phase, a conduction time of the switching element in the each output phase in a control cycle;a means for calculating a conduction loss of the switching element from the current value and the conduction time; anda means for calculating an amount of heat generated by the switching element from the ON loss and the OFF loss of the switching element and the conduction loss of the switching element.2. A power conversion device having an inverter main circuit in which a switching element is mounted , a gate driver that drives the switching element , a PWM control unit that generates , based on a triangular wave carrier and a voltage command value , an ON/OFF control signal used to drive the switching element , and a control circuit that calculates the voltage command value , the power conversion ...

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Номер записи: 36
16-05-2013 дата публикации

MOTOR CONTROL DEVICE, WALKING ASSIST DEVICE, AND MOTOR CONTROL METHOD

Номер: US20130123671A1
Автор: Ikeuchi Yasushi
Принадлежит: HONDA MOTOR CO., LTD.

A motor control device includes: a coil temperature detection unit which detects a coil temperature of a motor; an upper limit current determination unit which determines an upper limit value of a coil current in which a coil temperature after a lapse of a first predetermined time from the present is maintained at an upper limit temperature or lower, every time a second predetermined time shorter than the first predetermined time elapses, by using a coil temperature detected by the coil temperature detection unit; and a coil current control unit which controls the coil current so as to be equal to or lower than the upper limit value. 1. A motor control device comprising:a coil temperature detection unit which detects a coil temperature of a motor;an upper limit current determination unit which determines an upper limit value of a coil current in which a coil temperature after a lapse of a first predetermined time from the present is maintained at an upper limit temperature or lower every time a second predetermined time shorter than the first predetermined time elapses by using a coil temperature detected by the coil temperature detection unit; anda coil current control unit which controls the coil current so as to be equal to or lower than the upper limit value.2. The motor control device according to claim 1 , wherein the upper limit current determination unit is configured to determine the upper limit value of the coil current by using the present coil temperature as a coil temperature and using the upper limit temperature and the first predetermined time.3. The motor control device according to claim 2 , wherein:the motor is a three-phase motor;the coil temperature detection unit is configured to detect a coil temperature for each phase of the three-phase motor;the upper limit current determination unit is configured to determine the upper limit value for each phase on the basis of the individual-phase coil temperature; andthe coil current control unit is ...

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Номер записи: 37
13-06-2013 дата публикации

INDUCTION LOAD DRIVING SYSTEM

Номер: US20130147278A1
Автор: Arisawa Daijiro, Yamada Masako
Принадлежит: Panasonic Corporation

When a direction command signal indicates a first direction, a signal for causing the other end of the induction load to be connected to a second power supply unit is output as a second control signal. In addition, after a passage of a first predetermined delay time after a first current detection value becomes less than a reference value of a conducting current, a signal for causing the one end of the induction load 5 to be connected to a first power supply unit is output as a first control signal. And, after a passage of a second predetermined delay time after the first current detection value becomes equal to or greater than the reference value of the conducting current, a signal for causing the one end of the induction load to be connected to the second power supply unit is output as the first control signal. 1. An induction load driving system comprising:a H-bridge circuit including four switching elements which are two switching elements connected to one end of an induction load and two switching elements connected to the other end of the induction load, the H-bridge circuit being connected between a first power supply unit and a second power supply unit in which its voltage is different from a voltage of the first power supply unit; anda control signal generating circuit configured to, according to a direction in which the conducting current flows through the induction load, generate a control signal to fix a state in which the two switching elements connected to one of the one end and the other end of the induction load are exclusively turned ON, and to perform switching to exclusively turn ON the two switching elements connected to the other of the one end and the other end of the induction load based on the conducting current flowing through the induction load;wherein the control signal generating circuit is configured to exclusively turn ON the two switching elements connected to the other of the one end and the other end of the induction load to increase ...

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Номер записи: 38
13-06-2013 дата публикации

TEMPERATURE PROTECTION DEVICE

Номер: US20130147407A1
Автор: Kawamura Hiromichi
Принадлежит: NISSAN MOTOR CO., LTD.

A temperature protection device basically includes a temperature detector, a temperature estimator, an overheated determining component and an overheating protection component. The temperature detector detects a temperature of a semiconductor component. The temperature estimator estimates an estimated temperature of the semiconductor component. The overheated determining component determines whether the semiconductor component is in an overheated state based on the detected temperature and the estimated temperature by using a first estimated temperature as the estimated temperature at a time point when the detected temperature has reached a first threshold temperature and a second estimated temperature that is estimated subsequent to the time point as the estimated temperature when the detected temperature has reached the first threshold temperature. The overheating protection component protects the semiconductor component from the overheating based on a determination made by the overheated determining component. 1. A temperature protection device comprising:a temperature detector configured to detect a temperature of a semiconductor component;a temperature estimator configured to estimate an estimated temperature of the semiconductor component;an overheated determining component configured to determine whether the semiconductor component is in an overheated state based on the detected temperature and the estimated temperature by using a first estimated temperature at a time point when the detected temperature has reached a first threshold temperature and a second estimated temperature that is estimated subsequent to the time point at which the detected temperature has reached the first threshold temperature, the overheated determining component being further configured tocalculate a temperature differential between the first estimated temperature and the second estimated temperature, anddetermine that the semiconductor component is in an overheated state when the ...

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Номер записи: 39
11-07-2013 дата публикации

Sequential pulse firing of multiple motors in an flywheel array

Номер: US20130175953A1
Автор: Astley Carl William, Astley Dale Vernon, Mills Simon, Nock Kevin, Rimell Chris, Smith James
Принадлежит:

A method of initiating sequential pulse firing of a motor to reduce energy consumption in machines that have both rotational and linear kinetic energy stored in them by pulsing the motor at variable frequency without reducing total kinetic energy in the machine below a predetermined level. 1. A method comprising a control to sequentially pulse a motor; and , or provide continuous power to a motor2. A method as in ; coupled to a mass; and rotating the mass3. A method as in ; where the method control monitors angular velocity of the mass assembly; and calculates the rotational inertia and kinetic energy of the mass assembly from inputted predetermined values; and uses these kinetic energy values based on predetermined levels when to initiate sequential pulsing and the duration of the pulse to each motor; and to subsequently stop sequential pulsing the motor; and provide the motor with continuous power when the kinetic energy falls below a predetermined level This application benefit Claims To Prior Applications under 35 U.S.C. §§119(e) Application No. 61/576,488 filing date Dec. 16, 2011Flywheels are used for power smoothing and power storage. The basic design and function of flywheels has remained unchanged since the Neolithic times.A flywheel is heavy revolving wheel in a machine that is used to increase the machine's momentum and thereby provide greater stability or a reserve of available power during interruptions in the delivery of power to the machine.Flywheels are designed to store rotational kinetic energy by inputting energy into the flywheel by a coupling device connected to a motor and recovering energy by a generator through a coupling. Flywheel devices are found in all areas from clockwork pocket watches to automobile wheels. A flywheel is powered from its axis of rotation or its perimeter. For a given energy input a flywheel will accelerate to a terminal velocity when input force equals the total dissipative forces.The method is a means for controlling ...

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Номер записи: 40
11-07-2013 дата публикации

ELECTRIC COMPRESSOR

Номер: US20130175964A1
Автор: WATANABE Yutaka
Принадлежит: Panasonic Corporation

An electric compressor capable of following temperature changes of a power element even if a temperature measurement unit is disposed separately from the power element. In the electric compressor, the temperature measurement unit () measures the temperature of a substrate () on which the power element () is disposed. A rotational speed detection unit () detects the rotational speed of a motor. A control unit () estimates the temperature of the power element () on the basis of the rotational speed of the motor detected by the rotational speed detection unit () and the temperature measured by the temperature measurement unit (). 1. An electric compressor comprising:a motor that generates a driving force to compress a refrigerant;a power element that drives the motor;a temperature measurement section that measures a temperature of a substrate on which the power element is disposed:a rotational speed detection section that detects the rotational speed of the motor; anda control section that estimates a temperature of the power element,wherein the control section estimates the temperature of the power element on the basis of the rotational speed of the motor detected by the rotational speed detection section and the temperature measured by the temperature measurement section.2. The electric compressor according to claim 1 , wherein:the control section further adjusts electric power output from the power element, and stops the power element when the estimated temperature of the power element is equal to or higher than a predetermined temperature.3. The electric compressor according to claim 1 , wherein:the motor is disposed inside a casing;the refrigerant passes through an inside of the casing; andthe power element is disposed in contact: with an outside of the casing.4. The electric compressor according to claim 1 , wherein:the control section estimates the temperature of the power element by subtracting a value, which increases with an increase in the rotational speed ...

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Номер записи: 41
18-07-2013 дата публикации

Fault-tolerant electrical machine

Номер: US20130181553A1
Автор: Cedric Monnay, Dezheng Wu, Frederic Tholence, Lars Gertmar, Magnus Byggnevi, Waqas Arshad
Принадлежит: Individual

An electrical machine with a rotor or the stator including a plurality of discrete field modules, and the other one of the rotor and the stator including a plurality of armature coils connected to different power converters. Each field module includes one or more field coils which can be activated independent of the field coils of the neighbouring field modules. When at least one of the field coils is inactivated, e.g. because of a defect, each of the power converters is allowing less power to pass through when an armature coil connected to it is moving over an inactivated field coil, and more power to pass through when the armature coil connected to it is moving over an activated field coil.

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Номер записи: 42
18-07-2013 дата публикации

COMPONENT FOR A NETWORK SYSTEM

Номер: US20130181649A1
Автор: Ahn Junho, Jang Yongwoon, Kim Yanghwan, Lee Hoonbong, Lee Jeongwon, Lee Koonseok
Принадлежит:

Provided is a component for a network system, which includes a communication device for receiving at least energy information, a component driver part driven by supplied energy, and a control part that recognizes high price-related information or low price-related information, based on the energy information received by the communication device and that controls the component driver part. A method of controlling the component driver part when the high price-related information is recognized is different from a method of controlling the component driver part when the low price-related information is recognized. 1. A component for a network system , comprising:a communication device that receives at least energy information;a component driver part driven by supplied energy; anda control part that recognizes high price-related information or low price-related information, based on the energy information received by the communication device and that controls the component driver part,wherein a method of controlling the component driver part when the high price-related information is recognized is different from a method of controlling the component driver part when the low price-related information is recognized.2. The component according to claim 1 , further comprising a washing chamber in which a washing target is accommodated claim 1 ,wherein the component driver part comprises a motor for rotating the washing chamber.3. The component according to claim 2 , wherein a driving motion in which the washing target is moved is determined according to a method of controlling the motor claim 2 , andthe driving motion comprises a normal motion and at least one specific motion.4. The component according to claim 3 , wherein when the high price-related information is recognized while the specific motion is performed claim 3 , the method of controlling the motor is changed to perform the normal motion.5. The component according to claim 4 , wherein when the low price-related ...

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Номер записи: 43
18-07-2013 дата публикации

MOTOR CONSTANT CALCULATING METHOD FOR PM MOTOR, AND MOTOR CONSTANT CALCULATING DEVICE

Номер: US20130181650A1
Автор: NISHIZONO MASARU, Tazawa Toru
Принадлежит: Panasonic Corporation

A motor constant calculating method for a PM motor according to the present invention includes a voltage applying step of applying an applied voltage including a DC component and a plurality of frequency components to a PM motor, a motor current detecting step of detecting a motor current flowing depending on the applied voltage applied in the voltage applying step, and a motor constant calculating step of calculating a motor constant of the PM motor based on the applied voltage and the motor current. 1. A motor constant calculating method for a PM motor , comprising:a voltage applying step of applying an applied voltage including a DC component and a plurality of frequency components to a PM motor;a motor current detecting step of detecting a motor current flowing depending on the applied voltage applied in the voltage applying step; anda motor constant calculating step of calculating a motor constant of the PM motor based on the applied voltage and the motor current.2. The motor constant calculating method for a PM motor according to claim 1 ,wherein, the applied voltage applied to the PM motor in the voltage applying step includes a plural number of voltages, each having a different DC voltage component and the plurality of frequency components.3. The motor constant calculating method for a PM motor according to claim 1 ,wherein the applied voltage including the plurality of frequency components is an applied voltage added with white noise.4. The motor constant calculating method for a PM motor according to claim 3 ,wherein the white noise is an M-sequence signal.5. The motor constant calculating method for a PM motor according to claim 1 ,wherein the applied voltage including the plurality of frequency components is an applied voltage added with sinusoidal waves the frequency of which changes with time.6. The motor constant calculating method for a PM motor according to claim 1 ,wherein the motor constant calculating step includes arithmetically operating a ...

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Номер записи: 44
01-08-2013 дата публикации

Rechargeable electric tool and method for manufacturing rechargeable electric tool

Номер: US20130193881A1
Автор: Masaki Ikeda, Masamichi Nakamura, Motoharu Muto
Принадлежит: Panasonic Corp

The electric tool is powered by a secondary battery as a power source, and includes: an output section configured to be transmitted thereto a rotation of a motor directly or through a decelerator; a voltage measurement section that measures a battery voltage; a storage means that stores, as a reference voltage, a voltage value of the battery voltage measured preliminarily when a motor-lock is occurring; and a control means that controls a driving of the motor. The control means is configured to decide that the motor is being locked and then stop or decelerate the motor upon detecting that the battery voltage measured through the voltage measurement section is maintained lower than or equal to the reference voltage stored in the storage means for a predetermined period of time during the driving of the motor.

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Номер записи: 45
01-08-2013 дата публикации

Motor device

Номер: US20130193883A1
Автор: Hiroyuki Shitabou
Принадлежит: Nidec Corp

A motor device may include a motor unit and a converter unit. The motor unit may include a brushless DC motor, an inverter circuit, and an inverter drive circuit. The inverter circuit may supply a drive current to the brushless DC motor. The inverter drive circuit may supply a drive pulse signal to the inverter circuit. The converter unit may be connected to the motor unit. The converter unit may include an AD/DC converter and a microcomputer. The AC/DC converter may convert an AC voltage to a DC voltage to be supplied to the motor unit. The microcomputer may receive a digital control signal and may output an analog control signal. The inverter drive circuit may receive the analog control signal outputted from the microcomputer and may output a drive pulse signal to be supplied to the inverter circuit.

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Номер записи: 46
01-08-2013 дата публикации

Method for operating a brushless electric motor

Номер: US20130193885A1
Автор: Christian Gunselmann, Lionel Guichard, Mathias Fernengel, Michel Parette, Nicolas Bruyant
Принадлежит: Continental Automotive GmbH

A method for operating a brushless electric motor, the windings being energized by an inverter with the aid of six switches. A detection unit for detecting defective switches, a unit for measuring voltage at the outputs of the inverter, and a microcontroller for controlling the switch and for generating a pulse width modulated voltage supply for the windings are provided. A short-circuited switch causes a torque in the electric motor opposite the actuating direction of the electric motor. The method proposes that after detecting a short-circuited switch, the windings (U. V. W) are energized to generate a motor torque that is, on the whole, positive. An actuating period of the electric motor is divided into a plurality of sectors, wherein, in accordance with the defective switch, individual sectors are deactivated for the actuation of the windings (U, V, W), while other sectors are used to actuate the windings (V, W).

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Номер записи: 47
01-08-2013 дата публикации

MOTOR CONTROL APPARATUS AND CONTROL METHOD THEREOF

Номер: US20130193895A1
Автор: Kaitani Toshiyuki, Noguchi Tomohiro
Принадлежит: Mitsubishi Electric Corporation

The second torque value and a motor speed detected from the motor in operation are compared to an upper limit and lower limit of torque tolerance which is obtained based on the third torque value. Accordingly, if the third torque value exceeds the upper limit or underruns the lower limit of the torque tolerance, the motor is stopped in accordance with a difference between the third torque value and the torque tolerance. Consequently, since abnormality of the motor can be promptly and accurately detected within an entire speed range including a lower speed range, it is effective for protecting the motor or the machine equivalent of a load for the motor. 15-. (canceled)6. A control method for a motor control apparatus comprising:a trial operation step for trially operating a motor, detecting a current value flowing to the motor and a speed value of the motor, and calculating a first torque value by using the current value;a data processing step for performing data processing on speed values of the motor detected in the trial operation step and first torque values calculated in the trial operation step;an operation step for operating the motor, detecting a current value flowing to the motor and a speed value of the motor, and calculating a second torque value by using the current value;a torque correction step for correcting, based on the speed value of the motor detected in the trial operation step and the first torque value, to obtain a third torque value at the speed value of the motor detected in the operation step; andan abnormal torque judging step for judging, by comparing the second torque value calculated by the speed value of the motor detected while the motor is in operation and the torque calculator to torque tolerance which is calculated based on the third torque value, whether or not the second torque value exceeds an upper limit or underruns a lower limit of the torque tolerance; wherein the data processing step includes:a step for separating the speed ...

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Номер записи: 48
08-08-2013 дата публикации

Motor control device, current control method applied to motor control device, and electric power steering device using motor control device

Номер: US20130200827A1
Автор: Isao Kezobo, Kosuke Nakano, Yoshihito Asao
Принадлежит: Mitsubishi Electric Corp

Provided is a motor control device ( 10 ) for controlling a motor ( 5 ) provided with a plurality of sets of windings, in which, when a current control unit ( 23 ) detects a short-circuit failure as a primary failure, the current control unit ( 23 ) continues the control, and, further, when the current control unit ( 23 ) detects a secondary failure, the current control unit ( 23 ) provides control of opening a power supply relay ( 3 ). Accordingly, in a case where a failure of a winding of a motor or an inverter occurs, a torque pulsation is restrained and a sufficient output torque is provided, and further, in a case where a secondary failure occurs, excessive heat generation and current consumption are prevented and the cost of the device is reduced.

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Номер записи: 49
08-08-2013 дата публикации

CONTROL METHOD OF WASHING MACHINE

Номер: US20130200833A1
Автор: Ko Cheolsoo, YOO Heakyung
Принадлежит:

Disclosed is a control method of a washing machine. The method includes performing first-stage rotation in which a drum is rotated at a predetermined rotational speed, performing second-stage rotation in which the drum is rotated at a first target RPM when a predetermined time has passed after the first-stage rotation ends, performing deceleration rotation in which the rotational speed of the drum is kept at a lower value than in the second-stage rotation, and performing third-stage rotation in which the drum is rotated at a second target RPM that is greater than the rotational speed of the drum in the deceleration rotation. Accordingly, it is possible to prevent laundry from being adhered to an inner surface of the drum during removal of moisture contained in laundry, and to achieve an increased contact area between laundry and hot air via uniform dispersion of laundry, resulting in enhanced laundry drying performance. 1. A control method of a washing machine , the method comprising:performing first-stage rotation in which a drum is rotated at a predetermined rotational speed;performing second-stage rotation in which the drum is rotated at a first target RPM when a predetermined time has passed after the first-stage rotation ends;performing deceleration rotation in which the rotational speed of the drum is kept at a lower value than in the second-stage rotation; andperforming third-stage rotation in which the drum is rotated at a second target RPM that is greater than the rotational speed of the drum in the deceleration rotation.2. The control method according to claim 1 , wherein the first-stage rotation includes sensing the amount of wet laundry.3. The control method according to claim 1 ,wherein the second-stage rotation includes first acceleration in which the drum is accelerated to the first target RPM and first constant-speed rotation in which the drum is rotated at the first target RPM for a first time, andwherein the third-stage rotation includes second ...

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Номер записи: 50
08-08-2013 дата публикации

MOTOR CONTROL DEVICE

Номер: US20130200835A1
Автор: Ikeda Hidetoshi, Isoda Takashi, Sano Shuya, Sekiguchi Hiroyuki
Принадлежит: Mitsubishi Electric Corporation

To improve estimation accuracy of a frequency and an attenuation coefficient of residual vibration in which a plurality of frequencies are superimposed, a motor control device includes a vibration-damping-control setting unit configured to designate one of a plurality of candidate frequencies of a vibration-damping frequency, a signal-for-estimation computing unit configured to output, based on an operation signal Xm related to a controlled object , a signal for estimation Xs in which signal components of the other candidate frequencies excluding the designated one candidate frequency are reduced from a vibration component of a control system, and a resonance-characteristic estimating unit configured to estimate one resonance frequency from the output signal for estimation Xs. The vibration-damping-control setting unit designates each of the candidate frequencies individually as one candidate frequency and sets, in a feedforward control unit , each of resonance frequencies estimated by the resonance-characteristic estimating unit related to the individually designated each one candidate frequency. 17-. (canceled)8. A motor control device comprising:a feedforward control unit configured to compute a feedforward signal according to an input operation command to reduce signal components at a set plurality of vibration-damping frequencies;a driving-command computing unit configured to compute, using the feedforward signal, a driving command for driving a controlled object;a vibration-damping-control setting unit configured to designate one of a plurality of candidate frequencies of a vibration-damping frequency;a signal-for-estimation computing unit configured to output, based on an operation signal equivalent to a value of a position, speed, or acceleration related to the controlled object, a signal for estimation in which the signal components of the other candidate frequencies excluding the designated one candidate frequency among the candidate frequencies are ...

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Номер записи: 51
08-08-2013 дата публикации

METHOD FOR OPERATING A WORK APPARATUS HAVING AN ELECTRIC MOTOR AND WORK APPARATUS HAVING AN ELECTRIC MOTOR

Номер: US20130200837A1
Автор: Liebhard Gernot, Oerding Jochen, Renz Christian, Wichert René
Принадлежит: ANDREAS STIHL AG & CO. KG

An electric motor in a work apparatus has a power characteristic line which runs between a lower rotational speed of the electric motor and an upper rotational speed of the electric motor. The power characteristic line has a power characteristic with a pronounced maximum (M) and an operating plateau (AP) which lies in a working rotational speed range (AD) of the work apparatus. A method for operating the electric motor provides for configuring the position of the operating plateau (AP) to be variable with respect to the rotational speed of the electric motor to achieve stable operating points over a wide rotational speed range. 1. A method for operating an electric motor in a work apparatus having a power characteristic line between a lower rotational speed of the electric motor and an upper rotational speed of the electric motor wherein the power characteristic line is configured so as to cause the power characteristic to have a pronounced maximum (M) and an operating plateau disposed in an operating rotational speed range (AD) of the work apparatus , the method comprising the step of:shifting the position of the operating plateau (AP) with respect to the rotational speed (n) of the electric motor.2. The method of claim 1 , wherein said shifting of the position of the operating plateau (AP) is performed with an otherwise unchanged power characteristic of the power characteristic line.3. The method of claim 1 , wherein said shifting of the position of the operating plateau (AP) with respect to the rotational speed (n) is achieved by setting a desired rotational speed range (AD).4. The method of claim 1 , wherein said shifting of the position of the operating plateau (AP) with respect to the rotational speed (n) is achieved by setting a desired operating rotational speed (n claim 1 , n claim 1 , n claim 1 , n).5. The method of further comprising the steps of:{'sub': A', 'A1', 'A2', 'A3, 'preselecting one of an operating rotational speed range (AD) and an operating ...

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Номер записи: 52
22-08-2013 дата публикации

PORTABLE APPLIANCE MOTOR CONTROL WITH SPEED-BASED CURRENT LIMITATION

Номер: US20130214716A1
Автор: Barfus Dan Christian, Conard Wayne Weaver, Lai Alex, Xiao Rainman
Принадлежит: WHIRLPOOL CORPORATION

A method of controlling a portable appliance includes measuring an input current supplied to a motor of the portable appliance and measuring a rotational speed of a shaft of the motor. The method also includes determining a current limit based on the rotational speed of the shaft using a substantially continuous function which relates a domain of rotational speeds to a range of current limits. The method further includes reducing, when the input current exceeds the current limit, the rotational speed of the shaft incrementally along the substantially continuous function until the input current is approximately equal to the current limit. 1. A method of controlling a portable appliance , the method comprising:measuring an input current supplied to a motor of the portable appliance;measuring a rotational speed of a shaft of the motor;determining a current limit based on the rotational speed of the shaft using a substantially continuous function which relates a domain of rotational speeds to a range of current limits; andreducing, when the input current exceeds the current limit, the rotational speed of the shaft incrementally along the substantially continuous function until the input current is approximately equal to the current limit.2. The method of claim 1 , wherein:measuring the input current supplied to the motor comprises periodically sampling, at a first sampling rate, an output signal of a current sensor;measuring the rotational speed of the shaft of the motor comprises periodically sampling, at a second sampling rate, an output signal of a revolutions-per-minute (RPM) sensor; andthe first and second sampling rates each have a greater frequency than a periodic drive signal used to drive the motor.3. The method of claim 1 , wherein determining the current limit using the substantially continuous function comprises calculating the output of a linear function with the rotational speed of the shaft as the input.4. The method of claim 1 , wherein determining the ...

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Номер записи: 53
29-08-2013 дата публикации

ROTATING ELECTRICAL MACHINE

Номер: US20130221890A1
Автор: Fujita Masahiko, Nakajima Dai, Shirakata Yuji
Принадлежит: Mitsubishi Electric Corporation

Provided is a rotating electrical machine capable of downsizing. The rotating electrical machine includes: a stator () including an armature winding (); a rotor () provided inside the stator () in a rotatable manner; a power circuit unit () including a power circuit semiconductor switching element, for supplying a current to the armature winding (); and a control board () in which an energization-allowed time corresponding to revolution speed of the rotor () is set, for controlling supply of the current by the power circuit unit (), in which the control board () stops the supply of the current by the power circuit unit () when an integrated time of energization times to the armature winding () is longer than the energization-allowed time. 18-. (canceled)9. A rotating electrical machine , comprising:a stator including an armature winding;a rotor provided inside the stator in a rotatable manner;a power circuit unit including a power circuit semiconductor switching element, for supplying a current to the armature winding; anda control device in which an energization-allowed time corresponding to revolution speed of the rotor is set, for controlling supply of the current by the power circuit unit,wherein the control device stops the supply of the current by the power circuit unit when an integrated time of energization times to the armature winding from the start of the energization is longer than the energization-allowed time.10. A rotating electrical machine according to claim 9 , further comprising a first temperature detection device for detecting a temperature of the power circuit semiconductor switching element claim 9 ,wherein the control device controls the supply of the current by the power circuit unit in accordance with the temperature of the power circuit semiconductor switching element.11. A rotating electrical machine according to claim 10 , wherein the energization-allowed time corresponding to the temperature of the power circuit semiconductor switching ...

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Номер записи: 54
05-09-2013 дата публикации

POSITION CONTROL DEVICE FOR ELECTRIC MOTOR

Номер: US20130229137A1
Автор: Hamada Shizunori, Hirao Kuniaki, Kanazashi Yasuhiro, Takahashi Toshimichi
Принадлежит:

Position control device for electric motor inputs deviation signal between angle command and angle detection value to position control section and calculates angular velocity command, inputs deviation signal between this angular velocity command and angular velocity detection value to speed control section and calculates torque current command, and controls, according to this torque current command, the electric motor current control section. The Position control device has disturbance observer section which inputs the torque current command and the angular velocity detection value and estimates signal corresponding to disturbance torque; rate-of-change limitation section which has limiter inputting disturbance observer output value by this disturbance observer section and performing rate-of-change limitation of upper and lower limit values of the angle command; and target value filter section which is configured by control gain equivalent to the speed control section and through which the angular velocity command from the position control section passes. 1. A position control device for an electric motor , which inputs a deviation signalbetween an angle command and an angle detection value to a position control section and calculates an angular velocity command, inputs a deviation signal between this angular velocity command and an angular velocity detection value to a speed control section and calculates a torque current command, and controls, on the basis of this torque current command, the electric motor that is an object to be controlled through a current control section, the position control device comprising:a disturbance observer section which inputs the torque current command and the angular velocity detection value and estimates a signal corresponding to a disturbance torque;a rate-of-change limitation section which has a limiter inputting a disturbance observer output value by this disturbance observer section and performing rate-of-change limitation of ...

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Номер записи: 55
26-09-2013 дата публикации

MOTOR CONTROL APPARATUS

Номер: US20130249465A1
Автор: KAKU Yasuhiko, KIRIHARA Koichi, YOSHIURA Yasufumi
Принадлежит: KABUSHIKI KAISHA YASKAWA DENKI

A motor control apparatus includes a position controller that generates a velocity command on the basis of a position difference between a position command and a position feedback signal, a switcher that switches the position feedback signal to be input to the position controller from a first position signal detected by a laser interferometer to a second position signal detected by a position sensor, and a phase compensator that compensates for a phase delay of the second position signal switched by the switcher relative to the first position signal. 1. A motor control apparatus comprising:a position controller that generates a velocity command on the basis of a position difference between a position command and a position feedback signal;a switcher that switches the position feedback signal to be input to the position controller from one of a first position signal detected by a first position detector and a second position signal detected by a second position detector to the other; anda phase compensator that compensates for a phase delay of the first position signal or the second position signal switched by the switcher.2. The motor control apparatus according to claim 1 , a position control system model to which the position difference is input and from which the position feedback signal is output, and', 'a phase delay element model to which an output of the position control system model is input and from which an output that is the same as the first position signal or the second position signal is output., 'wherein the phase compensator includes'}3. The motor control apparatus according to claim 1 , further comprising:a storage that stores a correlation table containing a correlation between the first position signal and the second position signal; anda corrector that performs correction, when the switcher switches from one of the first position signal and the second position signal to the other, so that the position signal after switching coincides with the ...

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Номер записи: 56
26-09-2013 дата публикации

MEDICAL EXAMINATION SYSTEM

Номер: US20130253485A1
Автор: FEHRE JENS, Limmer Andreas, Nanke Ralf, Sechser Manfred
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A system includes at least one device that includes at least one device component. For a defined movement of the at least one device component, a movement axis and/or a movement direction may be selected by a selection element and may be identified by an activatable lighting element. The identified movement axis and/or the identified movement direction may be released by at least one actuation element, so that a desired movement of the at least one device component may be performed. 1. A system comprising:at least one device comprising at least one device component;a selection element operable to select a movement axis, a movement direction, or the movement axis and the movement direction for a defined movement of the device component;an activatable lighting element operable to identify the movement axis, the movement direction, or the movement axis and the movement direction; andan actuation element operable to release the identified movement axis, the identified movement direction, or the identified movement axis and the identified movement direction, so that a desired movement of the at least one device component is performable.2. The system as claimed in claim 1 , wherein the at least one device is configured as a medical device.3. The system as claimed in claim 1 , wherein the at least one device is configured as a C-arm unit.4. The system as claimed in claim 1 , wherein the at least one device is configured as an x-ray device.5. The system as claimed in claim 1 , wherein the at least one device is configured as a lithotripter.6. The system as claimed in claim 1 , wherein the at least one device is configured as a support table.7. The system as claimed in claim 1 , wherein the actuation element comprises a capacitive sensor.8. The system as claimed in claim 1 , wherein the lighting element comprises light-emitting diodes.9. The system as claimed in claim 1 , wherein the actuation element is configured as an electromechanical switch or a mechanical switch.10. ...

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Номер записи: 57
03-10-2013 дата публикации

MOTOR DRIVE APPARATUS

Номер: US20130257328A1
Автор: ARAI Kanta, Kabune Hideki, Mukai Yasuhiko
Принадлежит: Denso Corporation

When a failure detection part detects a failure in an inverter circuit in a first power supply system, a drive control part stops the inverter circuit from driving a motor. An on/off control part turns off a first power supply relay of a power supply on/off part. Under a state that the inverter circuit stops a motor driving operation, a first coil set of the motor generates an induced voltage by rotation caused by an external force. The induced voltage is regenerated to a battery from the inverter circuit through a second power supply relay and a parasitic diode of the first power supply relay. Thus, circuit elements in the power supply system, which is failing, are protected from breaking down. 1. A motor drive apparatus for driving a motor including a plurality of coil sets , each of which is formed of coils of a plurality of phases , the motor drive apparatus comprising:a plurality of inverter circuits, which is provided in correspondence to the plurality of coil sets and supplies electric power to the plurality of coil sets by converting an electric power supplied form an electric power source;an electric power supply on/off control circuit, which is provided in each power supply system between the electric power source and the inverter circuit and electrically conducts and interrupts the electric power source to and from the inverter circuit;a failure detection part, which detects a failure in the inverter circuit in each power supply system;a drive control part, which stops the inverter circuit in a failing power supply system from driving the motor, the failing power supply system corresponding to the power supply system having the failure detected by the failure detection part; andan on/off control part, which controls the electric power supply on/off circuit of the failing power supply system to a regenerative current conduction state when the failure detection part detects the failure, the regenerative current conduction state allowing the regenerative ...

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Номер записи: 58
17-10-2013 дата публикации

Synchronous motor control device for controlling synchronous motor to carry out power regenerative operation and stop synchronous motor at the time of power failure

Номер: US20130271048A1
Автор: Hajime Ogawa, Yasusuke Iwashita
Принадлежит: FANUC Corp

A second q-axis current command value, which is set by a q-axis current command value setting unit when an alternating-current power source fails at the time of driving of a synchronous motor, and a second d-axis current command value, which is set by a d-axis current command value setting unit when the alternating-current power source fails at the time of the driving of the synchronous motor, are set so that an absolute value of power per unit time of the synchronous motor is equal to loss per unit time of the synchronous motor.

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Номер записи: 59
31-10-2013 дата публикации

ELECTRIC POWER STEERING CONTROL DEVICE

Номер: US20130285587A1
Автор: Kimura Kazushi, Takemoto Yasushi
Принадлежит: Mitsubishi Electric Corporation

A electric power steering control device equipped with a motor having a resolver detection unit comprises: an ambient temperature detecting means () for detecting ambient temperature around a portion generating heat by current flow; a motor temperature detecting means () for, based on a signal from the resolver detection unit () of the motor (), estimating the temperature of the portion generating heat; and an abnormality determining means () for comparing the temperature detected by the ambient temperature detecting means with the temperature detected by the motor temperature detecting means and determining that the ambient temperature detecting means is abnormal. 1. A vehicle electric power steering control device equipped with a motor generating an assist force for a truing operation on a steering wheel by a current flown correspondingly to an operating condition of the vehicle and having a resolver detection unit , the electric power steering control device being characterized by including:ambient temperature detecting means for detecting ambient temperature around a portion generating heat by the current;motor temperature detecting means having temperature characteristics and for estimating a temperature of the portion generating heat on the basis of a signal of the resolver detection unit of the motor; andabnormality determining means for determining that the ambient temperature detecting means is abnormal by comparing a detection temperature by the ambient temperature detecting means with a temperature detected by the motor temperature detecting means.2. The electric power steering control device according to claim 1 , characterized in that:the abnormality determining means determines that the ambient temperature detecting means is abnormal by comparing the temperature detected by the ambient temperature detecting means with the temperature detected by the motor temperature detecting means to find that the both temperatures are different by a predetermined ...

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Номер записи: 60
07-11-2013 дата публикации

TURBINE POWERED ELECTROMECHANICAL ACTUATION SYSTEM

Номер: US20130292519A1
Автор: Hill David G.
Принадлежит: HAMILTON SUNDSTRAND CORPORATION

An electromechanical actuation system () for a space vehicle includes a propellant source () and at least one turbine () operably connected to the propellant source () and rotatable by a flow of propellant () therefrom. At least one electrical generator () is operably connected to the at least one turbine () and is configured to convert rotation of the turbine () into electrical energy. At least one electromechanical actuator () is operably connected to the at least one electrical generator () such that electrical energy from the at least one electrical generator () drives operation of the at least one electromechanical actuator (). A method of operating a turbine powered electromechanical actuator () for a space vehicle includes rotating the at least one turbine () via a flow of propellant () therethrough. Electrical energy is generated in at least one electrical generator () operably connected to the at least one turbine () and the electromechanical actuator () is operated with the electrical energy generated therein.

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Номер записи: 61
07-11-2013 дата публикации

ELECTRIC DRIVING APPARATUS

Номер: US20130293174A1
Автор: Uda Toshiaki
Принадлежит:

A valve control apparatus is provided with a valve, a shaft supporting the valve, an end-gear of an actuator driving the valve. The shaft is press-inserted into the end-gear. A stopper disposed on the shaft regulates a valve operation range. The end-gear can engage with the middle gear of the reduction-gears mechanism even in out of the gear-operation-angle range. When a rotation angle sensor detects a rotation angle of the end-gear in out of the gear-operation-angle range, it is determined that a malfunction occurs in a rotation-force-transmitting path. 1. An electric driving apparatus comprising:an electric motor generating a driving force while receiving an electric current;an electric current detecting means for detecting the electric current supplied to the electric motor, anda control means for controlling an energization to the electric motor so that the driving force is transmitted to a driven member in order to vary a displacement magnitude which represents at least one of a variation in position of the driven member and a variation in posture of the driven member, whereinthe displacement magnitude includes a hold value at which the driven member is mechanically held and the displacement magnitude does not vary even though the driving force is continued to be transmitted from the electric motor to the driven member so as to vary the displacement magnitude in one direction,the electric current supplied to the electric motor is stepwise increased when the displacement magnitude reaches the hold value after the displacement magnitude has been varied in one direction,the control means stores a threshold regarding the electric current supplied to the electric motor for determining whether the displacement magnitude normally reaches the hold value in a case that the electric motor is controlled in such a manner that the displacement magnitude reaches the hold value after the displacement magnitude has been varied in one direction, andafter the electric motor is ...

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Номер записи: 62
14-11-2013 дата публикации

Electric actuator

Номер: US20130300321A1
Автор: Hideaki Someya, Makoto Saruwatari, Takuji Abe
Принадлежит: Azbil Corp

An electric actuator has a motor, an electricity storing body, a switch and a resetting unit. The switch is provided in a supply path of electric power from the electricity storing body to the motor. The switch opens the supply path for electric power from the electricity storing body to the motor, in response to an instruction from an operator. The resetting unit is operated through receiving a supply of electric power from the external power supply when the external power supply has been restored from being cut off. The resetting unit closes the switch that is provided in the supply path of electric power from the electricity storing body to the motor.

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Номер записи: 63
14-11-2013 дата публикации

Power tool

Номер: US20130300331A1
Автор: Hidezumi Okamura, Kazuhiko Nishii
Принадлежит: Panasonic Corp

A power tool includes a motor, a gear mechanism that changes the speed of an output of the motor, a drive circuit including a switching element that controls power supplied to the motor, a housing that accommodates the motor, a fixture that fixes the motor to the housing, and a temperature sensor that measures a temperature of the switching element. The drive circuit stops supplying power to the motor when the temperature measured by the temperature sensor reaches a predetermined temperature. The fixture functions to radiate heat from the switching element.

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Номер записи: 64
14-11-2013 дата публикации

CONTROL APPARATUS FOR A POWER CONVERTER CONNECTED TO A ROTARY MACHINE WHICH IS OPERABLE AS A DRIVE MOTOR OF A VEHICLE

Номер: US20130300332A1
Автор: Inamura Hiroshi, KAKIHARA Takayuki, UEMATSU Hajime
Принадлежит: Denso Corporation

In a vehicle, a control apparatus controls a power converter supplying a rotary machine which can operate as a drive motor of the vehicle, and controls a cooling apparatus for circulating a coolant fluid through the rotary machine and the power converter. When a temporary condition occurs immediately after commencement of the circulation, whereby the temperatures of the coolant fluid and of switching elements in the power converter are judged to concurrently exceed respective specified temperature thresholds, the control apparatus limits the maximum power that can be supplied from the power converter to a lower value than is normally available. When the temperature of the coolant fluid is judged to no longer exceed the corresponding temperature threshold, the limiting is released. 1. A control apparatus for controlling each of a power converter and a cooling apparatus , the power converter comprising a plurality of switching elements and being electrically connected to a rotary machine , the rotary machine operating as a drive motor of a vehicle when supplied with electrical power from the power converter , the cooling apparatus operating to circulate a coolant fluid via a circulation path extending through the power converter and the rotary machine , and configured to acquire a temperature value of the switching elements ,wherein the control apparatus is configured to acquire a temperature value of the coolant fluid, and comprises processing circuitry configured for:executing a first comparison operation, to compare the acquired temperature value of the coolant fluid with a first temperature threshold;executing a second comparison operation, to compare the acquired temperature of the switching elements with a second temperature threshold, the second temperature threshold being higher than the first temperature threshold and no higher than a maximum allowable temperature of the switching elements; andselectively executing processing for limiting a maximum value of ...

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Номер записи: 65
14-11-2013 дата публикации

MOTOR HEALTH MONITORING AND MEDICAL DEVICE INCORPORATING SAME

Номер: US20130303989A1
Автор: Favreau Jacques L.
Принадлежит:

Apparatus are provided for motor control systems and related medical devices. In one embodiment, a control system includes a motor having a rotor, a modulation module coupled to the motor, and a control module coupled to the motor and the modulation module. The modulation module generates a modulated voltage that is applied to the motor, and the control module adjusts a duty cycle of the modulated voltage to achieve a commanded rotation of the rotor and detects a degradation condition based on the duty cycle. 1. A system comprising:a motor having a rotor;a modulation module coupled to the motor, the modulation module generating a modulated voltage applied to the motor, the modulated voltage oscillating between a first voltage and a second voltage, the modulated voltage being equal to the first voltage for a percentage of a time interval, the percentage corresponding to a duty cycle; anda control module coupled to the motor and the modulation module to adjust the duty cycle to achieve a commanded rotation of the rotor and detect a degradation condition based on the duty cycle.2. The system of claim 1 , wherein the control module detects the degradation condition when the duty cycle exceeds a reference value.3. The system of claim 2 , wherein the reference value is a duty cycle unlikely to be exceeded unless the motor has degraded.4. The system of claim 2 , wherein the reference value is a historical duty cycle average.5. The system of claim 2 , wherein the control module dynamically determines the reference value during operation of the system.6. The system of claim 1 , wherein the control module detects the degradation condition when the duty cycle gradually increases over a period of time.7. The system of claim 1 , further comprising a sensor to obtain a measured displacement that is influenced by rotation of the rotor claim 1 , wherein the control module is coupled to the sensor to increase the duty cycle in response to a difference between an expected ...

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Номер записи: 66
21-11-2013 дата публикации

Motor control device

Номер: US20130307448A1
Автор: Chiaki Fujimoto, Katsuya Ikemoto, Shunichi Wada
Принадлежит: Mitsubishi Electric Corp

An object is to provide a specific achievement means for achieving reliable failure determination in a control system in a motor control device. The motor control device includes motor drive means for supplying a motor current to a motor; motor current detection means for detecting the motor current; and a controller to which a motor current detection value from the motor current detection means is input, and which outputs a drive signal to the motor drive means, in which the controller includes voltage control means for controlling a voltage applied to the motor; power supply voltage detection means; means for limiting the maximum value (%) of a drive duty ratio in a PWM circuit to a smaller value, upon determining power supply voltage drop; and failure determination means for determining a failure in a case of an abnormal motor current value.

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Номер записи: 67
21-11-2013 дата публикации

STATOR TEETH, STATOR, ROTATING ELECTRIC MACHINE, AND METHOD FOR CONTROLLING ROTATING ELECTRIC MACHINE

Номер: US20130307455A1
Автор: Akatsu Kan, Hijikata Hiroki
Принадлежит: SHIBAURA INSTITUTE OF TECHNOLOGY

There is provided a single motor which performs plural driving characteristics and can expand output range thereof. Three coils are wounded around each of the stator teeth A to F, and provided to each stator tooth A to F are switches for providing a concentrated winding state by connecting the three coils in series in each stator tooth A to F, and switches for providing a distributed winding state by connecting in series the coils of any one of units through the stator teeth A to F Depending on the rotating speed, the torque or the like, the coils are changed between the concentrated winding state and the distributed winding state. 1. Stator teeth placed on a stator yoke , each stator tooth of the stator teeth comprising:at least two winding units being wound around the stator tooth; andat least one switch being connected with an end portion of one of the winding units and with an end portion of the other one of the winding units, whereinthe switch is capable of connecting with an end portion of another winding unit wound around another stator tooth.2. The Stator teeth claim 1 , according to claim 1 , whereinthe end portion of the one of the two winding units is further provided with a switch capable of connecting with the end portion of the another winding unit of the another stator tooth.3. A stator comprising a stator yoke; and stator teeth formed unifiedly with the stator yoke claim 1 , or placed on the stator yoke claim 1 , whereinat least two winding units u wound around each stator tooth of the stator teeth, andat least one switch is connected with an end portion of one of the winding units and an end portion of the other one of the winding units, whereinthe switch is capable of also connecting with an end portion of another winding unit wound around another stator tooth.4. The stator according to claim 3 , wherein the end portion of the one winding unit is further provided with a switch capable of connecting with the end portion of the another winding unit ...

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Номер записи: 68
21-11-2013 дата публикации

Electric turning device

Номер: US20130307456A1
Автор: Tetsuji Ono
Принадлежит: Sumitomo Heavy Industries Ltd

An electric turning device includes an electric motor configured to drive and turn an upper turning body that is rotatably arranged on a base part, an inverter that supplies electric power to the electric motor, a control part that supplies a drive command for controlling drive operations of the electric motor to the electric motor according to a lever input amount, and an abnormality detecting part that detects an abnormality. When the abnormality detecting part detects the abnormality, the control part arranges the drive command to include a vibration component and supplies the drive command including the vibration component to the electric motor.

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Номер записи: 69
21-11-2013 дата публикации

Method Of Optimising Input Components

Номер: US20130307457A1
Автор: Hargis Colin
Принадлежит: Control Techniques Limited

A method of controlling a current flowing through a component of a drive comprising the steps of: estimating the current flowing through a component; estimating the temperature of the component; comparing the estimated temperature with a desired maximum temperature for the component; and adjusting the current flowing through the component based on the result of the comparing step. 1. A method of controlling a current flowing through a component of a drive comprising the steps of:estimating the current flowing through a component;estimating the temperature of the component;comparing the estimated temperature with a desired maximum temperature for the component; andadjusting the current flowing through the component based on the result of the comparing step.2. The method of wherein the step of estimating the current comprises sampling torque produced in a load claim 1 , or current that produces torque in a load claim 1 , driven by the drive.3. The method of wherein the step of estimating the current comprises sampling shaft speed of a motor driven by the drive.4. The method of wherein the step of estimating the current comprises sampling the output frequency of an inverter of the drive.5. The method of wherein the step of estimating the current comprises sampling the output voltage of an inverter of the drive.6. The method of wherein the step of estimating the current comprises multiplying the current that produces torque in a load by the shaft speed to provide an estimate of the input power of the motor driven by the drive claim 3 , and optionally wherein the step of estimating the current further comprises applying a scaling factor to the result of the multiplication.7. The method of wherein the step of estimating the current further comprises applying a known relationship between input current of the drive and the input power of the motor.8. (canceled)9. The method of wherein the step of estimating the current comprises measuring the current in a d.c. link of the ...

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Номер записи: 70
28-11-2013 дата публикации

ENERGY STORAGE DEVICE FOR A SEPARATELY EXCITED ELECTRICAL MACHINE

Номер: US20130314008A1
Автор: Feuerstack Peter, Kessler Martin, Weissenborn Erik
Принадлежит: ROBERT BOSCH GMBH

The invention relates to an energy storage device () comprising at least one first energy supply branch () which is designed to supply a separately excited electrical machine () with energy via a first connection (), and a second energy supply branch () which is connected in parallel to the at least one first energy supply branch () and which is designed to supply a field winding () of the separately excited electrical machine () with current via a second connection (), the at least one first energy supply branch () and the second energy supply branch () being connected to the field winding () by means of third connections () via a common reference bus (). 2. The energy storage device as claimed in claim 1 , wherein the at least one first energy supply branch and the second energy supply branch comprise in each case at least two series-connected energy storage modules that comprise in each case at least one electrical energy storage cell having an allocated controllable coupling unit.3. The energy storage device as claimed in claim 2 , wherein the coupling units of the energy storage modules of the at least one first energy supply branch comprise switch elements in a full-bridge arrangement.4. The energy storage device as claimed in claim 3 , wherein the coupling units of the energy storage modules of the second energy supply branch comprise switch elements in a half-bridge arrangement claim 3 , and wherein the energy storage device is embodied for the purpose of supplying an n-phase synchronous AC machine with energy.5. The energy storage device as claimed in claim 2 , wherein the coupling units of the energy storage modules of the at least one first energy supply branch comprise switch elements in a half-bridge arrangement.6. The energy storage device as claimed in claim 5 , wherein the coupling units of the energy storage modules of the second energy supply branch comprise switch elements in a full-bridge arrangement claim 5 , and wherein the energy storage ...

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Номер записи: 71
28-11-2013 дата публикации

APPARATUS AND METHOD FOR CONTROLLING MOTOR SPEED

Номер: US20130314018A1
Автор: Gu Bon Young
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

The present invention relates to an apparatus and a method for controlling a motor speed. In accordance with an embodiment of the present invention, an apparatus for controlling a motor speed including: a speed difference detecting unit for calculating a difference between a motor control speed and a detected motor speed; a duty generating unit for changing a duty according to the speed difference detected by the speed difference detecting unit and duty update time adjustment; and a time adjusting unit for adjusting a duty update time according to a duty variation in the duty generating unit is provided. Further, a method for controlling a motor speed is provided. 1. An apparatus for controlling a motor speed , comprising:a speed difference detecting unit for calculating a difference between a motor control speed and a detected motor speed;a duty generating unit for changing a duty according to the speed difference detected by the speed difference detecting unit and duty update time adjustment; anda time adjusting unit for adjusting a duty update time according to a duty variation in the duty generating unit.2. The apparatus for controlling a motor speed according to claim 1 , the apparatus further comprises a gain adjustment block which receives the speed difference calculated by the speed difference detecting unit to output a gain adjustment value according to the speed difference to the duty generating unit claim 1 , whereinthe duty generating unit changes the duty according to the gain adjustment value output from the gain adjustment block and the duty update time adjustment.3. The apparatus for controlling a motor speed according to claim 1 , wherein the duty generating unit comprises:an adder which adds the adjustment value according to the speed difference calculated by the speed difference detecting unit and a duty value generated by a duty generator in the previous step to output the added value;a selector which multi-receives an output of the adder and the ...

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Номер записи: 72
28-11-2013 дата публикации

BRIDGE OUTPUT CIRCUIT, MOTOR DRIVING DEVICE USING THE SAME, AND ELECTRONIC APPARATUS

Номер: US20130314020A1
Автор: Sugie Hisashi
Принадлежит: ROHM CO., LTD.

A bridge output circuit includes an output terminal, a high side transistor, a low side transistor, a high side driver for controlling a gate voltage of the high side transistor, a low side driver for controlling a gate voltage of the low side transistor, and a controller for controlling the high side and low side drivers. The low side driver includes a first current source, a second current source, and a first assist circuit. The controller is configured to control the turning-on and turning-off states of the first current source, the second current source and the first assist circuit. 1. A bridge output circuit comprising:an output terminal to be connected to a load;a high side transistor interposed between an upper power line and the output terminal;a low side transistor interposed between the output terminal and a lower power line, the low side transistor being an N-channel MOSFET;a high side driver configured to control a gate voltage of the high side transistor;a low side driver configured to control a gate voltage of the low side transistor; anda controller configured to control the high side driver and the low side driver,wherein the low side driver includes:a first current source configured to switch between a turning-on state and a turning-off state and supply a first predetermined constant current to a gate of the low side transistor in the turning-on state;a second current source configured to switch between the turning-on state and the turning-off state and draw a second predetermined constant current out of the gate of the low side transistor in the turning-on state; anda first assist circuit configured to switch between the turning-on state and the turning-off state and draw a first auxiliary current out of the gate of the low side transistor in the turning-on state, the first assist circuit being provided separately from the second current source, andwherein the controller is further configured to control the turning-on state and the turning-off ...

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Номер записи: 73
05-12-2013 дата публикации

ELECTRIC AUTOMOBILE

Номер: US20130320747A1
Автор: Ozaki Takayoshi
Принадлежит:

An electric vehicle includes a motor unit to drive a wheel. The electric vehicle also includes a control system that controls the motor unit. The control system includes an inverter. The electric vehicle also includes a temperature sensor to sense temperature Tmc of the motor coils of the motor unit or a temperature sensor to sense temperature Tic of the inverter. The electric vehicle also includes a limiter to, if the temperature Tmc sensed by the sensor exceeds a motor coils temperature threshold, reduce a motor current of the unit until a derivative dTmc/dt of the sensed temperature Tmc with time t drops to zero or below, or to, if the temperature Tic sensed by the sensor exceeds an inverter temperature threshold, limit a current command to the inverter until a derivative dTic/dt of the sensed temperature Tic with time t drops to zero or below. 1. An electric vehicle comprising:a motor unit configured to drive a wheel, the motor unit including motor coils;a control system that controls the motor unit, the control system including an inverter;a temperature sensor that is associated with the motor coils of the motor unit and is configured to sense temperature Tmc of the motor coils or a temperature sensor that is associated with the inverter and is configured to sense temperature Tic of the inverter; anda limiter configured to, if the temperature Tmc sensed by the temperature sensor is equal to or greater than a motor coils temperature threshold, reduce a motor current of the motor unit until a derivative dTmc/dt of the sensed temperature Tmc with time t drops to zero or below, or to, if the temperature Tic sensed by the temperature sensor is equal to or greater than an inverter temperature threshold, limit a current command to the inverter until a derivative dTic/dt of the sensed temperature Tic with time t drops to zero or below,the limiter being further configured to, when the dTmc/dt or dTic/dt drops to zero or below, stop reducing a motor current of the motor ...

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Номер записи: 74
05-12-2013 дата публикации

MOTOR DRIVING CIRCUIT AND ELECTRONIC APPARATUS USING THE SAME

Номер: US20130320902A1
Автор: Sugie Hisashi
Принадлежит:

A motor driving circuit for driving a motor, includes: a detecting circuit configured to detect a detection signal indicative of a current state of the motor; a command value generating unit configured to generate a command value indicative of a target state of the motor; an error amplifier configured to generate an error signal by amplifying an error between the detection signal and the command value; a pulse width modulator configured to generate a pulse signal; and an output circuit. The command value generating unit is configured to provide a variation to the command value. 1. A motor driving circuit for driving a motor , comprising:a detecting circuit configured to detect a detection signal indicative of a current state of the motor;a command value generating unit configured to generate a command value indicative of a target state of the motor;an error amplifier configured to generate an error signal by amplifying an error between the detection signal and the command value;a pulse width modulator configured to generate a pulse signal having a duty cycle corresponding to the error signal; andan output circuit configured to apply a switching voltage having a duty cycle corresponding to the pulse signal across the motor,wherein the command value generating unit is configured to provide a variation to the command value.2. The motor driving circuit of claim 1 , wherein the command value generating unit includes:a set voltage generating part configured to generate a set voltage; anda first D/A converter configured to generate the command value, the first D/S converter having a reference voltage terminal receiving the set voltage and an input terminal receiving a digital value representing the command value,wherein the set voltage generating part is configured to provide a variation to the set voltage.3. The motor driving circuit of claim 2 , wherein the set voltage generating part includes:a set data generating portion configured to generate digital set data ...

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Номер записи: 75
05-12-2013 дата публикации

ELECTRONIC DEVICE AND METHOD FOR MONITORING FAN

Номер: US20130320904A1
Автор: YANG FENG-CHI
Принадлежит:

A method of monitoring a fan of a second electronic device. A first electronic device controls a baseboard management controller (BMC) of the second electronic device to return parameter values, the returned parameter values including temperature values of the second electronic device, and actual speed values of a fan of the second electronic device. The first electronic device records the returned parameter values and returned time of the returned parameter values. Upon acquiring standard speed values corresponding to the temperature values, the first electronic device draws a graph representing a relation between the actual speed values and the determined standard speed values corresponding to the returned time to monitor the fan. 1. A first electronic device in communication with a second electronic device , comprising:a storage device;at least one processor; andone or more programs that are stored in the storage device and are executed by the at least one processor, the one or more programs comprising:a controlling module that controls a baseboard management controller (BMC) of the second electronic device to return parameter values, the returned parameter values including temperature values of the second electronic device, and actual speed values of a fan of the second electronic device corresponding to the temperature values;a recording module that records the returned parameter values and returned time of the returned parameter values;a searching module that determines standard speed values corresponding to the temperature values in a prestored fan table, which comprises a plurality of standard speed values of the fan corresponding to different temperature values; anda drawing module that draws a graph representing a relation between the actual speed values and the determined standard speed values corresponding to the returned time to monitor the fan.2. The first electronic device of claim 1 , wherein the recording module further records completion time of ...

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Номер записи: 76
05-12-2013 дата публикации

Hybrid-type construction machine

Номер: US20130325269A1
Автор: Kouichi Shibata, Manabu Edamura, Manabu Sugiura, Shiho Izumi, Takatoshi Ooki
Принадлежит: HITACHI CONSTRUCTION MACHINERY CO LTD

A hybrid-type construction machine is provided which permits swing operation without a sense of awkwardness compared with conventional construction machines and which allows the amount of stored electricity in an electrical storage device to be controlled within an appropriate range of use in consideration of the service life of the electrical storage device without enlarging its capacity. The hybrid-type construction machine includes an electric motor and a hydraulic motor for driving a swing structure, an electrical storage device, and a controller for controlling charging and discharging of the electrical storage device. The controller includes a storage unit which stores a discharge command region to be set in accordance with the swing speed of the swing structure with regard to the amount of stored electricity in the electrical storage device, and a computing unit which, if the amount of stored electricity in the electrical storage device reaches the discharge command region stored in the storage unit, computes an additional drive torque command value for increasing the amount of powering of the electric motor in accordance with the amount of stored electricity in the electrical storage device, the computing unit further outputting the additional drive torque command value to the electric motor to drive the swing structure.

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Номер записи: 77
12-12-2013 дата публикации

Power Inverter

Номер: US20130328514A1
Автор: Keiji Kunii, Koichi Yahata, Masashige Tsuji, Seiji Funaba, Shinichiro Hida, Yasuo Noto
Принадлежит: HITACHI AUTOMOTIVE SYSTEMS LTD

An electric power converter is provided with a plurality of power-conversion elements; a first control circuit that outputs a first control signal; an electricity storage circuit; a second control circuit that outputs a second control signal when the direct-current power source that supplies electrical power to the first control circuit is not normal; and a drive circuit that outputs drive signals for driving the plurality of power-conversion elements. Each of the power-conversion elements is either a power-conversion element of the upper arm connected to the high-voltage side or a conversion element of the lower arm connected to the low-voltage side. In cases when the voltage of the electricity storage circuit is at a higher predetermined first voltage value, the second control circuit outputs a second control signal so that all the power-conversion elements of the upper arm or the lower arm are turned on and the others are turned off.

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Номер записи: 78
19-12-2013 дата публикации

METHOD OF CONTROLLING ROTATIONAL SPEED OF IMPELLER

Номер: US20130333521A1
Автор: Sugimura Masayuki, Tada Shintarou
Принадлежит:

A load current value I of a motor rotationally driving an impeller is read out when the impeller is rotated at a predetermined set rotational speed X, and the rotational speed of the impeller is increased so that the load current value I becomes equal to or larger than a threshold value Iwhen it is determined that the load current value I is smaller than the predetermined threshold value I. 1. A method of controlling the rotational speed of an impeller which is used to control the rotational speed of an impeller when molten metal and a desulfurizing agent added to the molten metal are mixed by the impeller immersed in the molten metal , the method comprising:{'sub': '0', 'reading out a load current value I of a motor rotationally driving the impeller when the impeller is rotated at a predetermined set rotational speed X; and'}{'sub': 0', '0, 'increasing the rotational speed of the impeller so that the load current value I becomes equal to or larger than a threshold value Iwhen it is determined that the load current value I is smaller than the predetermined threshold value I.'}2. The method of controlling the rotational speed of the impeller according to claim 1 , wherein the threshold value Iis a lower limit value of the load current value I in which defective desulfurization does not occur.3. The method of controlling the rotational speed of the impeller according to claim 1 , wherein the load current value I is read out after it is determined that a predetermined standby time elapses from the time when the rotational speed of the impeller reaches the set rotational speed X.4. The method of controlling the rotational speed of the impeller according to claim 1 , wherein an amount of increase of the rotational speed is a predetermined fixed value ΔX.5. The method of controlling the rotational speed of the impeller according to claim 1 , wherein an amount of increase of the rotational speed is determined based on a difference value between the load current value I and ...

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Номер записи: 79
19-12-2013 дата публикации

Electrically-augmented damping

Номер: US20130335737A1
Автор: John T. Stein
Принадлежит: Smiths Detection Inc

Provided herein are devices, systems, and methods for electrically-augmented damping of an actuator and associated devices. In particular, electrically-augmented damping derived from measurement of voltage across an actuator and current flowing through an actuator is provided.

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Номер записи: 80
26-12-2013 дата публикации

Control apparatus in motor drive system and method of controlling motor drive system

Номер: US20130342137A1
Автор: Noritaka Yamaguchi
Принадлежит: Honda Motor Co Ltd

A control apparatus in a motor drive system includes a magnet temperature acquiring device and a step-up ratio determining device. The magnet temperature acquiring device is configured to estimate or detect a temperature of a permanent magnet provided in a rotor or a stator of a motor of the motor drive system. The motor drive system includes a power supplying device to output direct current voltage, and a voltage step-up device to increase, at a certain step-up ratio, the direct current voltage which is output from the power supplying device. The step-up ratio determining device is configured to determine the certain step-up ratio in accordance with the temperature of the permanent magnet estimated or detected by the magnet temperature acquiring device.

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Номер записи: 81
26-12-2013 дата публикации

Electric power steering device

Номер: US20130342148A1
Автор: Kohei YANAI
Принадлежит: Toyota Motor Corp

A microcomputer calculates an internal resistance value of a motor, and subsequently calculates an internal resistance value of a switching element of a motor drive circuit. When the internal resistance value of the motor is a semi-abnormal value, the microcomputer sets an upper limit current. When the internal resistance value of the motor drive circuit is a semi-abnormal value, the microcomputer sets an upper limit current. The microcomputer sets a smaller one of the upper limit current and the upper limit current as an upper limit current of the motor. In this manner, the progress of degradation of the motor and the motor drive circuit can be suppressed.

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Номер записи: 82
26-12-2013 дата публикации

Motor control device that decreases power consumed by control power source when power fails

Номер: US20130342149A1
Автор: Kiichi Inaba, Naoki Masuda
Принадлежит: FANUC Corp

A PWM signal generation unit generates a PWM signal to drive a motor, based on a current value of the motor sampled by a current value sampling unit, a position or speed of the motor sampled by a motor sampling unit, and a position or speed of a driven object sampled by a driven object sampling unit. An operation stop unit stops the operation of any one of the motor sampling unit and the driven object sampling unit depending on the power stored in the DC link part and power to which the control power source can supply when the alternating-current power source fails.

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Номер записи: 83
26-12-2013 дата публикации

Auxiliary artificial heart pump drive device and auxiliary artificial heart system

Номер: US20130345804A1
Автор: Hideki Kanebako
Принадлежит: Sun Medical Technology Research Corp

An auxiliary artificial heart pump drive device for driving an auxiliary artificial heart pump includes first and second pump control parts which are arranged in duplexed configuration. Each pump control part controls the auxiliary artificial heart pump by outputting a drive signal to the auxiliary artificial heart pump. Each pump control part has a means which, when a failure is detected in the pump control part, electrically cuts off a path through which the drive signal is outputted to the auxiliary artificial heart pump. According to the present invention, it is possible to provide an auxiliary artificial heart pump drive device and an auxiliary artificial heart system which exhibit high availability even when a serious failure occurs by any chance without duplexing a pump device.

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Номер записи: 84
02-01-2014 дата публикации

Method for Operating an Electric Traction Drive System comprising a Battery Direct Inverter and Associated Control Apparatus

Номер: US20140001986A1
Автор: Fink Holger
Принадлежит:

The disclosure relates to a method for operating an electric traction drive system, which comprises an electric motor and a battery with a plurality of battery strings having battery modules. Each battery module is configured to be connected selectively with respect to output terminals of a respective battery string with positive polarization or negative polarization or to be bridged in the respective battery string, such that each battery string is configured to produce an adjustable output voltage. The battery modules are each monitored for proper functioning. When a technical fault in at least one battery module is detected, the at least one battery module is bridged and the traction drive system is transferred to a transition state in which the electric motor continues to be supplied and actuated by the connected battery modules in the battery module string such that a presently generated torque is maintained unchanged. 1. A method for operating an electric traction drive system , including an electric motor and a battery , the battery including a plurality of battery strings , each battery string of the plurality of battery strings including output terminals and a plurality of battery modules , the method comprising:producing an adjustable output voltage with each battery string of the plurality of battery strings by selectively connecting battery modules of the plurality of battery modules with positive polarization or negative polarization with respect to the output terminals of a respective battery string, or bridging battery modules of the plurality of battery modules in the respective battery string;monitoring each battery module of the plurality of battery modules for proper functioning during operation of the electric traction drive system;bridging a detected battery module of the plurality of battery modules in response to detecting a technical fault of the detected battery module; andtransferring the electric traction drive system to a transition state ...

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Номер записи: 85
02-01-2014 дата публикации

MOTOR CONTROLLER

Номер: US20140001998A1
Автор: Toda Takahisa
Принадлежит:

A motor controller that controls energization of a motor in which a plurality of coils U to W that applies torque to a rotor is arranged in a circular pattern includes: a rotation speed detection sensor that detects a rotation speed of the motor; and an energization control unit that controls energization of the plurality of coils U to W using the detected rotation speed. The energization control unit sequentially energizes the plurality of coils U to W in all energization patterns if the detected rotation speed is outside of predetermined conditions and sequentially energizes the plurality of coils U to W in remaining energization patterns (for example, U→V phase, V→W phase, V→U phase, W→U phase, and W→V phase) excluding a partial energization pattern (for example, U→W phase) of all energization patterns if the detected rotation speed is within the predetermined conditions. 1. A motor controller that controls energization of a motor in which a plurality of coils that applies torque to a rotor is arranged in a circular pattern , the motor controller comprising:a rotation speed detection sensor that detects a rotation speed of the motor; andan energization control unit that controls energization of the plurality of coils using the detected rotation speed, whereinthe energization control unit sequentially energizes the plurality of coils in all energization patterns if the detected rotation speed is outside of predetermined conditions, and sequentially energizes the plurality of coils in remaining energization patterns excluding a partial energization pattern of all energization patterns if the detected rotation speed is within the predetermined conditions.2. The motor controller according to claim 1 , whereinthe energization control unit includes:a rotation speed storage unit that stores the predetermined conditions; anda coil excitation control unit that controls energization patterns of the plurality of coils using the predetermined conditions.3. The motor ...

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Номер записи: 86
02-01-2014 дата публикации

MOTOR DRIVING APPARATUS AND BRUSHLESS MOTOR

Номер: US20140001999A1
Автор: SATO Daisuke
Принадлежит: Panasonic Corporation

A motor driving device according to the present invention includes: a PWM duty ratio detecting unit for detecting a target rotational speed based on a duty ratio of a PWM signal input from a host system; a PWM period detecting unit for detecting a period of the PWM signal; a PWM period error calculating unit for calculating an error between a PWM period output from the PWM period detecting unit and a PWM period previously set as a reference calculated by using the operational clock generator; a position detecting sensor for detecting a permanent magnet of the rotor; and an actual rotational speed calculating unit for calculating an actual rotational speed of the rotor by using a signal output from the position detecting sensor. The present motor driving device controls a speed while correcting the actual rotational speed based on the PWM period error. 1. A motor driving device including a rotor which holds a permanent magnet and is rotatably disposed about a rotary shaft , a stator in which a coil for each phase is wound around a stator iron core having a plurality of salient poles , a motor driving circuit for energizing the coil , and an operational clock generator for generating a clock signal for the motor driving circuit , the motor driving device comprising:a PWM duty ratio detecting unit for detecting a target rotational speed based on a duty ratio of a PWM signal input from a host system;a PWM period detecting unit for detecting a period of the PWM signal;a PWM period error calculating unit for calculating an error between a PWM period output from the PWM period detecting unit and a PWM period previously set as a reference calculated by using the operational clock generator;a position detecting sensor for detecting a permanent magnet of the rotor; andan actual rotational speed calculating unit for calculating an actual rotational speed of the rotor by using a signal output from the position detecting sensor, whereinthe motor driving device controls a speed ...

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Номер записи: 87
09-01-2014 дата публикации

Controller for multiple-phase rotating machine

Номер: US20140009093A1
Автор: Takashi Suzuki
Принадлежит: Denso Corp

A controller for a multiple-phase rotating machine includes power converters for supplying alternating current to winding sets of the rotating machine. A pair of each electrical power converter and a corresponding winding set forms a system. The controller further includes a failure detector for detecting a failure in each system. The failure causes a braking current in the rotating machine. The controller further includes a control section for setting a d-axis current and a q-axis current to drive the power converter in each system. When the failure detector detects the failure in any one of the systems, the control section stops the power converter in the failed system and sets the d-axis current in the normal system in such a manner that an electric current in the failed system is reduced.

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Номер записи: 88
16-01-2014 дата публикации

Inverter

Номер: US20140015461A1
Автор: Naohito Kanie, Tomohiro Ohba, Tomohiro Yamagami, Toshiaki Nagase
Принадлежит: Toyota Industries Corp

An inverter includes a warm-up control section and a switching control section. In a state in which an electric motor is not operating, the warm-up control section controls switching elements of an inverter circuit to perform warm-up control, in which direct currents are supplied to the coils of the respective phases of the electric motor, when the temperature of the capacitor is lower than a prescribed temperature. When a warm-up control is switched to a normal operation control, the switching control section sets initial phases of alternating currents such that the relationship between the values of the alternating currents supplied to the coils of the electric motor in the normal operation control matches with the relationship between the values of the direct currents that have been supplied to the corresponding coils of the electric motor in the warm-up control.

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Номер записи: 89
16-01-2014 дата публикации

VOLTAGE INCREASING CONTROL CIRCUIT AND POWER TOOL

Номер: US20140015465A1
Автор: ARIMURA Tadashi, KAIZO Hiroyuki, Ohashi Toshiharu
Принадлежит:

A voltage increasing control circuit is connected to a power supply to regulate power supplied to a load. The voltage increasing control circuit includes a voltage increasing unit configured to increase voltage that is supplied from the power supply, and supply the voltage to the load. A power estimation unit determines whether or not to increase the power supplied to the load. A voltage control unit controls the voltage increasing unit. When the power estimation unit determines to increase the power supplied to the load, the voltage control unit controls the voltage increasing unit to increase the power supplied to the load. 1. A voltage increasing control circuit connectable to a power supply to regulate power supplied to a load , the voltage increasing control circuit comprising:a voltage increasing unit configured to increase voltage that is supplied from the power supply, and to supply the voltage to the load;a power estimation unit that determines whether or not to increase the power supplied to the load; anda voltage control unit that controls the voltage increasing unit, wherein when the power estimation unit determines to increase the power supplied to the load, the voltage control unit controls the voltage increasing unit to increase the power supplied to the load.2. The voltage increasing control circuit according to claim 1 , further comprising an input signal changing unit that changes a signal provided to the power estimation unit claim 1 , wherein the power estimation unit is configured to determine whether or not to increase the power supplied to the load based on the signal provided from the input signal changing unit.3. The voltage increasing control circuit according to claim 2 , whereinthe power estimation unit determines a target value for the load based on the signal from the input signal changing unit, andthe power estimation unit is configured to determine whether or not to increase the power supplied to the load based on a difference between ...

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Номер записи: 90
23-01-2014 дата публикации

Derating Vehicle Electric Drive Motor and Generator Components

Номер: US20140021898A1
Автор: Bo Xie, Matthew Hendrickson
Принадлежит: Caterpillar Inc

A machine propelled by an electric motor and subject to a deration scheme is described wherein deration is specified by a combination of a temperature signal indicating a degree to which a machine component is overheating. The machine includes an electronic controller that receives a temperature signal indicative of a current temperature status of the electric motor. The electronic controller receives a motor speed signal indicative of a current speed status of the electric motor. The electronic controller calculates, in accordance with a derating scheme, a deration value for the electric motor, the deration value being determined by applying a set of current operating state parameter values to the derating scheme. The set of current operating state parameters include: a motor speed parameter value; and a temperature parameter value.

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Номер записи: 91
30-01-2014 дата публикации

MOTOR DRIVE OVERCURRENT BLOCKING CIRCUIT, MOTOR DRIVING CIRCUIT AND METHOD FOR BLOCKING OVERCURRENT THEREOF

Номер: US20140028233A1
Автор: Lee Soo Woong
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

The present invention relates to a motor drive overcurrent blocking circuit, a motor driving circuit, and a method for blocking an overcurrent in a motor driving circuit. The motor drive overcurrent blocking circuit includes: a motor driving unit switched according to a driving control signal to drive a motor; an overcurrent sensing unit connected between a lower end of the sink switching element group and a ground to sense a current flowing in the turned-on switching element of the sink switching element group in the sensing terminal; and an overcurrent blocking unit turned on according to a voltage due to an overcurrent sensed by the overcurrent sensing unit and blocking the overcurrent by sinking the driving control signal applied to the turned-on switching element of the sink switching element group to the ground is provided. 1. A motor drive overcurrent blocking circuit comprising:a motor driving unit switched according to a driving control signal to drive a motor while comprising a source switching element group connected to an upper side of an H-bridge to apply a power voltage to the motor and a sink switching element group connected to a lower side of the H-bridge to sink a current flowing through the motor to a sensing terminal for sensing a current;an overcurrent sensing unit connected between a lower end of the sink switching element group and a ground to sense a current flowing in the turned-on switching element of the sink switching element group in the sensing terminal; andan overcurrent blocking unit turned on according to a voltage due to an overcurrent sensed by the overcurrent sensing unit and blocking the overcurrent by sinking the driving control signal applied to the turned-on switching element of the sink switching element group to the ground.2. The motor drive overcurrent blocking circuit according to claim 1 , further comprising:a filter unit for removing a high-frequency noise in the sensing terminal of the overcurrent sensing unit while ...

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Номер записи: 92
30-01-2014 дата публикации

Motor drive overcurrent detecting circuit, motor driving circuit without headroom voltage loss, and method for detecting overcurrent in motor driving circuit

Номер: US20140028234A1
Автор: Joo Yul Ko, Soo Woong Lee
Принадлежит: Samsung Electro Mechanics Co Ltd

The present invention relates to a motor drive overcurrent detecting unit, a motor driving circuit without a headroom voltage loss, and a method for detecting an overcurrent in a motor driving circuit. The motor drive overcurrent detecting circuit includes: a motor driving unit switched according to a driving control signal to drive a motor; a sensing unit for distributing a sensing current from the current flowing through the motor according to turn-on of a distribution switching element and sensing the distribution current through a sensing resistor; and an on-resistance maintaining unit for maintaining on-resistance of the turned-on distribution switching element by turning on the distribution switching element. Further, a motor driving circuit without a headroom voltage loss and a method for detecting an overcurrent in a motor driving circuit are provided.

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Номер записи: 93
06-02-2014 дата публикации

Subsea Measurement And Monitoring

Номер: US20140035504A1
Автор: Hoosh Behrooz-Moghimian, Moen Tor-Eivind, Rongve Knut, Wiik Jan
Принадлежит:

A method for monitoring at least one subsea electric machine supplied by a system for electric power transmission. The system has a power supply, a controller and an AC power line connecting the at least one machine with the power supply. The method includes the steps of: receiving at the controller, high speed data from at least one subsea sensor arranged between the subsea side of the AC power line and the at least one subsea electric machine, wherein the high speed data includes measurements of an electrical parameter for the at least one machine; and comparing the one or more measurements to a predetermined value. A system for electric power transmission arranged for operating at least one subsea load or electric machine is also described. 1. A method for monitoring at least one subsea electric machine supplied by a system for electric power transmission , the system having power supply , a controller and an AC power line connecting the at least one machine with the power supply , the method comprising the steps of:receiving at the controller, data from at least one subsea sensor arranged between the subsea side of the AC power line and the at least one subsea electric machine, a data communication link comprising an optical cable connecting said at least one sensor with said controller, an ND conversion unit positioned at the subsea side of the data communication link for converting analogue data to digital data from at least one sensor prior to transmission of the data, an optical transceiver transmitting AD conversion results to the optical cable, a wavelength converter to change the wavelength of the output of the optical transceiver, and an offshore optical multiplexer/demultiplexer which enables the combination of several wavelengths, wherein the data includes measurements of an electrical parameter for the at least one machine; andcomparing the one or more measurements to a predetermined value.2. The method according to claim 1 , further comprising the ...

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Номер записи: 94
20-02-2014 дата публикации

Method and device for an electric motor drive

Номер: US20140049196A1
Автор: Daniel Salonen
Принадлежит: AMOTEC OY

Method and device for an electric-motor drive, particularly in connection with electric vehicles, in which a system consisting of rechargeable batteries produces operating current for the electric motor/electric motors moving the vehicle. An essential part of the method and device is that one single-cell battery, or several single-cell batteries separated galvanically from each other are used, the voltage of which is raised to an acceptable operating-voltage level.

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Номер записи: 95
27-02-2014 дата публикации

MOTOR DRIVING DEVICE, AND MOTOR CONTROL METHOD

Номер: US20140055071A1
Автор: Gu Bon Young
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

There is provided a motor driving device including: a speed detection unit detecting a speed of a motor; a comparison unit comparing the speed of the motor detected by the speed detection unit with an external input speed; and a speed control unit outputting the reference speed as a control signal when the speed of the motor is equal to a reference speed or less and outputting a motor control signal generated based on a comparative value of the comparison unit when the speed of the motor exceeds the reference speed. 1. A motor driving device , comprising:a speed detection unit detecting a speed of a motor;a comparison unit comparing the speed of the motor detected by the speed detection unit with an external input speed; anda speed control unit outputting the reference speed as a control signal when the speed of the motor is equal to a reference speed or less and outputting a motor control signal generated based on a comparative value of the comparison unit when the speed of the motor exceeds the reference speed.2. The motor driving device of claim 1 , wherein a rotational speed of the motor is controlled according to the control signal output from the speed control unit.3. The motor driving device of claim 1 , wherein the comparison unit generates claim 1 , as a comparative value claim 1 , a difference between the speed of the motor detected by the speed detection unit and an external input speed.4. A motor driving device claim 1 , comprising:an external input signal detection unit detecting a duty ratio of an external input pulse-width-modulation (PWM) signal;a speed detection unit detecting a speed of a motor;a comparison unit comparing the duty ratio detected by the external input signal detection unit with the speed of the motor detected by the speed detection unit; anda speed control unit generating a motor control signal based on a comparative value of the comparison unit,the speed control unit outputting the reference duty ratio as a control signal when the ...

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Номер записи: 96
27-02-2014 дата публикации

Cooling Stator Windings of an Electric Machine

Номер: US20140056726A1
Автор: Christopher Meszaros, Diana Brehob, Tyler Garrard, Will Robert Nielsen Hippen
Принадлежит: Ecomotors Inc

In an electric machine, there may be lubrication and cooling needs, such as lubricating bearings and cooling coils of the electric machine. When lubricant is used for both, it is desirable to prioritize the lubrication to the bearings. By providing check valves between a pressurized oil manifold and the cooling coils, lubricant is diverted to the coils only when pressure in the system is sufficient to satisfy both lubrication and cooling. In some embodiments, an oil gallery is provided on an outside surface of a back iron of the stator of the electric machine and orifices are provided in the back iron so that oil drips onto the coils of the electric motor. In some embodiments, the current commanded to the electric motor is based on whether or not lubricant (or other coolant) is being provided to the coils.

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Номер записи: 97
06-03-2014 дата публикации

ELECTRONIC FITNESS DEVICE

Номер: US20140062347A1
Автор: CHERNEGA John O.
Принадлежит:

An electronic fitness device is provided, the electronic fitness device including an enclosure having a cover, a motor positioned within the enclosure, a circuit board, a variable resistor positioned on the circuit board, the variable resistor comprising a first trace, a second trace, and a semiconductive film disposed over the first trace and the second trace, and control circuitry coupled to at least the motor and the circuit board. The cover is positioned to press the semiconductive film against the first trace and the second trace in response to a pressure applied to the cover, and the control circuitry is configured to actuate the motor in response to a change in the resistance between the first trace and the second trace resulting from the pressure applied to the cover. Also provided are a method of monitoring abdominal muscle position, and control circuitry. 1. An electronic fitness device , comprising: a case; and', 'a cover;, 'an enclosure, comprisinga motor positioned within the enclosure;a circuit board positioned between the case and the cover; a first trace;', 'a second trace; and', 'a semiconductive film disposed over the first trace and the second trace; and, 'a variable resistor positioned on the circuit board, the variable resistor comprisingcontrol circuitry coupled to at least the motor and the circuit board;wherein the semiconductive film is positioned between the circuit board and the cover;wherein the cover is positioned to press the semiconductive film against the first trace and the second trace in response to a pressure applied to the cover;wherein a resistance between the first trace and the second trace varies inversely in response to the applied pressure on the semiconductive film; andwherein the control circuitry is configured to actuate the motor in response to a change in the resistance between the first trace and the second trace.2. The device of claim 1 , further comprising a clip secured to the enclosure.3. The device of claim 1 , ...

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Номер записи: 98
06-03-2014 дата публикации

APPARATUS AND METHOD FOR CONTROLLING SPEED OF MOTOR

Номер: US20140062369A1
Автор: Gu Bon Young
Принадлежит: Samsung Electro-Mechanics Co. Ltd.

An apparatus for controlling a speed of a motor, includes: a first duty change detection unit detecting a change in duty of a PWM signal supplied from the outside; a speed conversion unit converting a speed indication (command) having the PWM signal into an actual speed value (RPM value) based on the change in duty detected by the first duty change detection unit; a speed control unit generating a new speed indication value to be applied to a motor and determining the duty value of PWM signal based on the new speed indication value; a second duty change detection unit detecting the change in the duty value of PWM signal determined by the speed control unit; and a PWM generation unit generating the PWM signal actually applied to the motor based on the change in the duty value detected by the second duty change detection unit. 1. An apparatus for controlling a speed of a motor , comprising:a first duty change detection unit detecting a change in duty of a PWM signal supplied from the outside;a speed conversion unit converting a speed indication (command) having a PWM signal form supplied from the outside into an actual speed value (RPM value) based on the change in duty detected by the first duty change detection unit;a speed control unit generating a new speed indication value to be applied to a motor based on a difference between the indication speed (reference speed) converted by the speed conversion unit and a current speed (detection speed) of the motor and determining the duty value of PWM based on the new speed indication value;a second duty change detection unit detecting the change in the duty value of PWM determined by the speed control unit; anda PWM generation unit generating the PWM signal actually applied to the motor based on the change in the duty value detected by the second duty change detection unit.2. The apparatus according to claim 1 , further comprising:a duty detection unit disposed before the first duty change detection unit to detect the duty ...

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Номер записи: 99
06-03-2014 дата публикации

MOTOR DRIVING DEVICE AND METHOD OF PROTECTING MOTOR DRIVING DEVICE

Номер: US20140062373A1
Автор: ANRAKU Fumio, FUKUI Jirou
Принадлежит:

A motor driving device includes a motor driving circuit, an element temperature sensor, a control circuit, an ambient-temperature estimator, and an overheat protection processor. The motor driving circuit has a plurality of switching elements. The element temperature sensor is configured to detect a temperature of each of the switching elements. The ambient-temperature estimator is configured to estimate an ambient temperature around the control circuit based on a temperature of at least one of the switching elements detected by the element temperature sensor if the at least one of the switching elements is not performing the switching operation. The overheat protection processor is configured to execute a first overheat protection process to protect the control circuit from overheating if the ambient temperature around the control circuit estimated by the ambient-temperature estimator exceeds a first overheat criterion temperature. 1. A motor driving device comprising:a motor driving circuit that has a plurality of switching elements and that is configured to perform switching of direct-current power supplied from a power source by using the switching elements so as to output motor driving power for driving a motor;an element temperature sensor configured to detect a temperature of each of the switching elements;a control circuit that is disposed at a position where the control circuit is to be heated by heat released from the switching elements and that is configured to control switching operation of the switching elements;an ambient-temperature estimator configured to estimate an ambient temperature around the control circuit based on a temperature of at least one of the switching elements detected by the element temperature sensor if the at least one of the switching elements is not performing the switching operation; andan overheat protection processor configured to execute a first overheat protection process to protect the control circuit from overheating if ...

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Номер записи: 100