PROCEDURE FOR THE DETECTION OF A THERMAL OVERLOAD SITUATION WITH ELECTRICAL HANDICRAFT THINGS

INDIRECT ROTOR RESISTANCE ESTIMATION SYSTEM AND METHOD

Indirect rotor resistance estimation for an AC induction motor is achieve d by successively stepping the quadrature command to zero and the direct cur rent command to a predetermined value causing the quadrature stator voltage to decay as a representation of rotor current decay; defining, in response t o the decaying stator voltage reaching two spaced thresholds, a voltage/time difference, and retrieving from a storage device the rotor resistance assoc iated with the voltage/time difference.

Method and device for determining a rotor temperature, computer program, and computer program product

motor elétrico e método de controle do mesmo

ЭЛЕКТРИЧЕСКАЯ МАШИНА

FIELD: electrical engineering. SUBSTANCE: invention relates to electrical engineering, specifically to electric machine with rotor made of superconducting material and a control method. Electric machine (101) includes stator (103), rotatably mounted rotor (105) having magnetisable and cooled rotor section (107) made of superconducting material (417) and control unit (109) configured to magnetise with stator current rotor section (107) made of superconducting material (417). Control unit (109) provides control of electric machine (101) depending on temperature of superconducting material and magnetic field of rotor. EFFECT: technical result is improved operating characteristics of superconducting electric machines. 9 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 611 067 C2 (51) МПК H02K 55/04 (2006.01) H02K 1/02 (2006.01) H02K 15/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2014106554, 20.07.2012 (24) Дата начала отсчета срока действия патента: 20.07.2012 (72) Автор(ы): КУММЕТ Петер (DE), ШМИДТ Хайнц (DE) (73) Патентообладатель(и): СИМЕНС АКЦИЕНГЕЗЕЛЛЬШАФТ (DE) Дата регистрации: (56) Список документов, цитированных в отчете о поиске: EP 0508936 A1, 14.10.1992. DE Приоритет(ы): (30) Конвенционный приоритет: 25.07.2011 DE 102011079727.0 (45) Опубликовано: 21.02.2017 Бюл. № 6 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 25.02.2014 (86) Заявка PCT: EP 2012/064335 (20.07.2012) (87) Публикация заявки PCT: 2 6 1 1 0 6 7 (43) Дата публикации заявки: 27.08.2015 Бюл. № 24 2822421 A1, 30.11.1978. US 2010038986 A1, 18.02.2010. US 2003052554 A1, 20.03.2003. RU 2023341 C1, 15.11.1994. RU 2086067 C1, 27.07.1997. RU 2180156 C1, 27.02.2002. R U 21.02.2017 2 6 1 1 0 6 7 R U Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) ЭЛЕКТРИЧЕСКАЯ МАШИНА (57) Формула изобретения 1. Электрическая машина (101), ...

ЭЛЕКТРИЧЕСКАЯ МАШИНА

... 1. Электрическая машина (101), содержащая:- статор (103),- установленный с возможностью вращения ротор (105) с охлаждаемым, намагничиваемым роторным участком (107) из сверхпроводящего материала (417), при этом- предусмотрен блок (109) управления, который предназначен для управления статорным током для индуцирования магнитного потока через сверхпроводящий материал (417).2. Электрическая машина (101) по п. 1, в которой управляющий блок (109) дополнительно предназначен для управления статорным током в зависимости от температуры сверхпроводящего материала (417).3. Электрическая машина (101) по любому из пп. 1 или 2, в которой управляющий блок (109) дополнительно предназначен для управления статорным током в зависимости от измеряемого магнитного поля ротора.4. Электрическая машина (101) по любому из пп. 1 или 2, в которой ротор (105) содержит охлаждаемый с помощью охлаждающей среды полюсный сердечник (407), на котором расположен роторный участок (107).5. Электрическая машина (101) по п. 4, в ...

Rotor temperature monitoring method and system for permanent magnet

A rotor temperature monitoring method and system for a permanent magnet synchronous motor. According to the method and system, an a-phase line current and a b-phase line current of a stator of a permanent magnet synchronous motor are obtained as a first line current and a second line current (S101); further, a line voltage between the a phase and the b phase of the stator is obtained (S102) and a rotating speed of the rotor of the permanent magnet synchronous motor is obtained (S103); and then, the first line current, the second line current, the line voltage, the rotating speed of the rotor, an inductance parameter of the permanent magnet synchronous motor and a temperature characteristic equation of a permanent magnet of the rotor are substituted into a preset rotor permanent magnet temperature expression to calculate and obtain the temperature of the rotor (S104). By means of the rotor temperature monitoring method and system, it is unnecessary to embed a temperature sensor in the rotor ...

Diagnosis and prognosis of rotor thermal sensitivity

PROCEDURE FOR THE COLLECTION OF THE TEMPERATURE OF THE PROMOTION LIQUID OF A CENTRIFUGAL PUMP

The rotary motor of the magnet temperature estimating apparatus and rotary motor magnet temperature estimating method

Electronic apparatus and method of controlling electric motor mounted in electronic apparatus

An electronic apparatus includes: a timer member that clocks time on the basis of the power supplied from a power source. A power supply member supplies the power to an electric motor of the electronic apparatus and to the timer member from the power source and interrupts the power supply thereto. A heat storage calculating member calculates heat storage of the electric motor and calculates heat storage of the electric motor after stop of the drive on the basis of the time clocked by the timer member. A controller controls the electric motor and controls the power supply member by initiating power-on and power-off operations. This is performed so as to, maintain the power supply to the timer member and the heat storage calculating member during a predetermined time, even after the power-off operation of the operation member.

WIPER DEVICE

A wiper motor control circuit carries out control in which a driving circuit generates, and supplies to a wiper motor, a voltage that eliminates deviation between a target speed and an actual speed of an output shaft. In a case in which a state in which the deviation between the target speed and the actual speed is greater than or equal to a predetermined threshold value continues for a predetermined time or more, the wiper motor control circuit carries out control that lowers the target speed and in which the driving circuit generates, and supplies to the wiper motor, a voltage that eliminates deviation between the lowered target speed and the actual speed of the output shaft.

Control of a brushless motor

Method for monitoring e.g. permanent magnet synchronous motor, of hybrid car, involves estimating temperature value of part of motor from voltage value of voltage signal in phase of electric motor and from angular speed value of motor

Un procédé de surveillance d'un moteur à aimants permanents de traction de véhicule automobile, comprenant : - recevoir (302) une valeur de tension dans une phase du moteur (Vrms) et une valeur de vitesse angulaire du moteur (Ω), ces valeurs ayant été mesurées pour un couple nul et pour un courant alimentant un stator dudit moteur nul, - estimer (303) une valeur de température (Ta) d'au moins une partie du moteur à partir de la valeur de tension reçue et à partir de la valeur vitesse angulaire reçue, et - utiliser cette estimation pour améliorer, alimenter, initialiser ou recaler (304) un modèle dynamique (305).

Electric machine temperature control

A test automation system may specify a temperature setpoint for an electric machine system and generate a command for the electric machine system to output a torque in such a manner that a temperature of the electric machine system varies within a predefined range of the temperature setpoint for at least a predefined period of time.

Verfahren für Drehmomentregelungssysteme und auf der Rotortemeperatur basierende Verfahren

Ein Elektromotor-Steuersystem eines Fahrzeugs beinhaltet ein Strombefehlsmodul, dazu konfiguriert, basierend auf einer Motordrehmomentanforderung für einen Elektromotor des Fahrzeugs einen ersten d-Achsenstrombefehl für den Elektromotor und einen ersten q-Achsenstrombefehl für den Elektromotor zu erzeugen. Ein Einstellmodul ist dazu konfiguriert, basierend auf einer Drehzahl eines Rotors des Elektromotors und der Motordrehmomentanforderung selektiv eine d-Achsenstromeinstellung und/oder eine q-Achsenstromeinstellung, basierend auf einer Temperatur des Rotors des Elektromotors, zu ermitteln. Ein Einstellungsmodul ist dazu konfiguriert, einen zweiten d-Achsenstrombefehl für den Elektromotor durch Einstellen des ersten d-Achsenstrombefehls, basierend auf der d-Achsenstromeinstellung, zu erzeugen und um einen zweiten q-Achsenstrombefehl für den Elektromotor durch Einstellen des ersten q-Achsenstrombefehls, basierend auf der q-Achsenstromeinstellung, zu erzeugen.

Control of a brushless motor

ARRANGEMENT WITH AN ELECTRICAL MACHINE AS WELL AS PROCEDURE FOR THE OPERATION OF AN ELECTRICAL MACHINE

Electric motor and method for controlling the same

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).

Inverter control device and air conditioner

An inverter control device controls an inverter unit for converting the DC voltage from a converter unit to an AC voltage and supplying the AC voltage to a DC electric motor in order to perform control that follows an operation condition in a control for preventing the operation of the DC electric motor from being stopped due to step-out. The inverter control device is provided with: a storage unit for storing information about a step-out limit; a step-out limit current calculation unit for calculating the limit value of step-out limit current on the basis of the magnet temperature of the DC electric motor, a bus voltage applied to the inverter unit, and the information about the step-out limit; and a control unit for comparing a primary current input to the converter unit with the limit value and for, when the primary current exceeds the limit value, outputting a command for adjusting the operation frequency of the DC electric motor so that the primary current becomes less than or equal ...

ELECTRIC MOTOR AND METHOD FOR CONTROLLING THE SAME

A single phase universal electric motor (100) of a portable electric tool, i.e. a motor having stator (2) and rotor windings (7) connected in series, the motor also including 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.

Motor control method

Inverter control device and air conditioner

DEVICE FOR MONITORING A SYNCHRONOUS ELECTRIC MACHINE WITH PERMANENT MAGNETS FOR THE TRACTION OF A MOTOR VEHICLE

Electric machine including a temperature sensing system

An electric machine includes a housing, a stator including stator windings mounted to the housing, a rotor supported in the housing and configured to rotate relative to the stator, a temperature sensing system including one or more resistors mounted to one of the stator and the rotor, and a controller electrically connected to the one or more resistors. The controller is configured and disposed to determine a temperature of the one of the stator and the rotor based on an electrical parameter of the one or more resistors.

Speed-regulated external fans for the temperature-controlled throughput ventilation of turbogenerators, phase shifters, and rotating electrical machines for network stabilization

In a rotating electrical machine, in particular a generator, different components, such as, for example, rotor, stator rod and end zone, are cooled as required by associated external fans, whereby the cooling power requirement is reduced. The method for cooling includes a plurality of cooling fans arranged for cooling different components of the machine, wherein a cooling fan is individually controlled in its cooling performance in accordance with the temperature of the associated component.

Method and apparatus for operating an electrical drive system

Method and apparatus for operating an electrical drive system

Coil temperature estimation method and motor control device

Inverter control device and air conditioner

An inverter control device that controls an inverter unit that converts a DC voltage from a converter unit to an AC voltage and supplies the AC voltage to the DC motor includes a storage unit that stores therein information regarding a synchronization-loss limit; a synchronization-loss limit-current calculation unit that calculates the limitation value on the synchronization-loss limit current on the basis of the magnet temperature of the DC motor, the bus voltage to be applied to the inverter unit, and the information regarding a synchronization-loss limit; and a control unit that compares the primary current to be input to the converter unit with the limitation value and that, when the primary current exceeds the limitation value, outputs an adjustment command to adjust the operating frequency of the DC motor such that the primary current becomes equal to or less than the limitation value.

Steuervorrichtung und Verfahren für bürstenlosen Motor

Die vorliegende Erfindung sieht eine Steuervorrichtung und ein Steuerungsverfahren für einen bürstenlosen Motor vor, die Erregungsmodi zum Auswählen einer durch eine Pulsbreitenmodulations-Operation zu erregenden Phase aus Phasen des bürstenlosen Motors einschließen und zum Steuern der Drehzahl des bürstenlosen Motors durch Umschalten zwischen den Erregungsmodi basierend auf einem Vergleich einer in einer nicht-erregten Phase induzierten Spannung mit deren Schwellenwert vorgesehen sind. In der Steuervorrichtung und dem Verfahren wird die Eingangsspannung des bürstenlosen Motors erhöht, wenn der Zeitraum, während dessen die induzierte Spannung unverändert beibehalten wird, oder der Zeitraum, während dessen der gegenwärtige Erregungsmodus weiter verwendet wird, eine vorbestimmte Zeit erreicht. Dies verhindert, dass der bürstenlose Motor in dem gestoppten Zustand bleibt, selbst wenn die Last an dem bürstenlosen Motor abrupt zunimmt, während der bürstenlose Motor bei einer Drehzahl innerhalb ...

Diagnosis of rotor thermal sensitivity

A system for diagnosis of thermal sensitivity in a rotor of an electrical machine such as a generator comprises a means for measuring vibration and a means for measuring field current from the rotor, and a system for calculating a relationship between vibration and field current. If the relationship is significant, or if the relationship varies significantly over time, the system issues a notification of thermal sensitivity, or may recommend operating conditions to give below the maximum allowable vibration. Other operating parameters of the machine, such as temperature, load, hydrogen gas purity or pressure, rotor speed, bearing temperature or armature voltage or current, are used to determine if the machine is operating in a stable state. Only when the machine is in a stable state can the relationship between measured vibration and current be assessed for significance. The relationship may be the slope of a plot of vibration versus field current.

Method for the detection of a thermal overload situation in a hand-held power tool

MOTOR CONTROL METHOD

To provide a motor control method ensuring that dragging loss at the time of high rotation can be reduced. 1. A method for controlling a motor comprising a rotor having disposed thereon a permanent magnet and utilizing a magnet torque and a reluctance torque ,{'sub': c1', 'c2', 'c2', 'c1, 'wherein the permanent magnet is a composite permanent magnet having a magnetic phase and a grain boundary phase present around the magnetic phase, the magnetic phase has a core part and a shell part present around the core part, the Curie temperature of one of the core part and the shell part is TK, the Curie temperature of another is TK, and TK is higher than TK, and'}{'sub': s', 'c1', 'c2', 's', 'c1, 'wherein when the magnitude of the reluctance torque is equal to or greater than the magnitude of the magnet torque, the temperature of the composite permanent magnet is set at TK that is (T−100) K or higher and lower than TK and when the magnitude of the reluctance torque is less than the magnitude of the magnetic torque, the temperature of the composite permanent magnet is set at lower than the temperature TK or TK, whichever is lower.'}2. The method according to claim 1 , wherein the Curie temperature of the core part is TK and the Curie temperature of the shell part is TK.3. The method according to claim 2 , wherein the composite permanent magnet has an overall composition of (RR)FeCoBM(wherein Rrepresents one or more selected from the group consisting of Nd and Pr claim 2 , Rrepresents one or more selected from group consisting of Ce claim 2 , La claim 2 , Gd claim 2 , Y and Sc claim 2 , M represents one or more selected from the group consisting of Ga claim 2 , Al claim 2 , Cu claim 2 , Au claim 2 , Ag claim 2 , Zn claim 2 , In and Mn and an unavoidable impurity claim 2 , 0 Подробнее

Diagnose und Prognose thermischer Empfindlichkeit eines Rotors

Geschaffen sind ein System und Verfahren zur Diagnose und Prognose thermischer Empfindlichkeit in einem Rotor einer elektrischen Maschine. Ein erstes System (18) zum Bewerten thermischer Empfindlichkeit in einem Rotor einer elektrischen Maschine ist geschaffen und enthält: ein Eingabesystem (20), um Schwingungsdaten (34) und Feldstrom (36) von dem Rotor zu gewinnen, und um einen Satz von Betriebsparametern (38) zu gewinnen; ein System (24) zum Berechnen eines Verhältnisses zwischen der Schwingung und dem Feldstrom (36); ein Bewertungssystem (26) zum Ermitteln, ob das Verhältnis signifikant ist; und ein System (27) zum Ausgeben einer Meldung thermischer Empfindlichkeit in Reaktion auf eine Ermittlung eines signifikanten Verhältnisses. Ein zweites System beinhaltet ein System (24) zum Berechnen einer Reihe von Verhältnissen zwischen Schwingung (34) und Feldstrom (36) über eine gewisse Zeitspanne; ein Bewertungssystem (26) zum Ermitteln, ob eine Veränderung der Reihe von Verhältnissen über ...

Elektrische Maschine

Die Erfindung betrifft eine elektrische Maschine (101), umfassend einen Stator (103), einen drehbar gelagerten Rotor (105) mit einem kühlbaren magnetisierbaren Rotorabschnitt (107) aus einem supraleitenden Material (417), wobei eine Steuerung (109) zum Steuern eines Statorstroms zum Induzieren eines magnetischen Flusses durch das supraleitende Material (417) gebildet ist. Die Erfindung betrifft ferner ein Verfahren zum Betreiben einer elektrischen Maschine (101).

VERFAHREN UND VORRICHTUNG ZUM ÜBERWACHEN UND STEUERN EINER SYNCHRONEN ELEKTRISCHEN MASCHINE

Das Steuern einer synchronen elektrischen Maschine umfasst, dass ein Rotorfeldstrom eines gewickelten Rotors der synchronen elektrischen Maschine bestimmt wird, und dass eine zeitliche Änderung einer Feldflusskopplung bestimmt wird. Eine Rotorfeldspannung wird auf der Grundlage der zeitlichen Änderung der Feldflusskopplung bestimmt und ein Rotorfeldwiderstand wird auf der Grundlage der Rotorfeldspannung und des Rotorfeldstroms bestimmt. Eine Rotortemperatur wird auf der Grundlage des Rotorfeldwiderstands bestimmt. Der Betrieb der synchronen elektrischen Maschine wird in Ansprechen auf einen Drehmomentbefehl und die Rotortemperatur gesteuert.

Verfahren und Vorrichtung zum Bestimmen einer Rotortemperatur, Computerprogramm, Computerprogramm-Produkt

Die Erfindung betrifft ein Verfahren zum Bestimmen einer Rotortemperatur einer elektrischen Maschine, insbesondere Asynchronmaschine, wobei die Rotortemperatur zumindest in Abhängigkeit von Blindleistungen und/oder in Abhängigkeit von Verlusten der elektrischen Maschine bestimmt wird. Es ist vorgesehen, dass eine erste Rotortemperatur in Abhängigkeit von den Blindleistungen bestimmt und durch eine zweite, in Abhängigkeit von den Verlusten bestimmte Rotortemperatur in Abhängigkeit von einem Betriebsbereich der elektrischen Maschine plausibilisiert oder ersetzt wird.

Operating a motor having the stator flux aligned with the rotor flux

An electrical drive system 10 includes an electric motor 70 comprising an armature, which is mounted on a stator, and a rotor. The stator flux is aligned with the rotor flux to enable current to flow in the armature without inducing torque on the rotor shaft 80. The method may be used, for example, in testing the electrical drive system. The electric drive system can carry full rated current yet produce little or no torque, thereby increasing the current that can be tested during electrical drive test procedures, compared with prior-art procedures. The method may be used in heating the electric motor for example for the purpose of de-icing as it enable the electric drive system to carry full rated current yet produce little or no torque, thereby allowing the current to be used to generate heat in the motor.

INDIRECT ROTOR RESISTANCE ESTIMATION SYSTEM AND METHOD

Indirect rotor resistance estimation for an AC induction motor is achieved by successively stepping the quadrature command to zero and the direct current command to a predetermined value causing the quadrature stator voltage to decay as a representation of rotor current decay; defining, in response to the decaying stator voltage reaching two spaced thresholds, a voltage/time difference, and retrieving from a storage device the rotor resistance associated with the voltage/time difference.

METHOD AND APPARATUS FOR PROVIDING THERMAL PROTECTION FOR LARGE MOTORS BASED ON ACCURATE CALCULATIONS OF SLIP DEPENDENT ROTOR RESISTANCE

A microprocessorized thermal protection system and accompanying method measures input voltage and current of an induction motor and derives therefrom continuously updated estimates of the slip dependent rotor resistance during acceleration of the motor. The measurements and calculations of the varying rotor resistance enable determination of the heat generated within the motor based on a thermal model thereof. Phase shift distortions induced by the measurement system are accounted for by determining the value of the stator resistance at start up. In addition, during a brief period following start up, sampling of the voltage/current inputs is suspended to avoid the effects of the initially occurring DC-offset resulting from the application of the voltage input to the inductive motor load.

MONITORING OF A PERMANENT-MAGNET MOTOR

APPARATUS FOR CONTROLLING DRIVE MOTOR OF VEHICLE AND METHOD USING THE SAME

An apparatus for controlling a drive motor of a vehicle in which a wound rotor synchronous motor is mounted includes: an inverter which controls a stator current supplied to a stator of the drive motor and a rotor current supplied to a rotor of the drive motor; and a drive motor controller which controls the inverter such that the stator current and the rotor current are supplied to the drive motor when a temperature of the rotor is less than a threshold value, and only the stator current is supplied to the drive motor when the temperature of the rotor is greater than or equal to the threshold value. 1. An apparatus for controlling a drive motor of a vehicle in which a wound rotor synchronous motor is mounted , the apparatus comprising:an inverter which controls a stator current supplied to a stator of the drive motor and a rotor current supplied to a rotor of the drive motor; anda drive motor controller which controls the inverter such that the stator current and the rotor current are supplied to the drive motor when a temperature of the rotor is less than a threshold value, and only the stator current is supplied to the drive motor when the temperature of the rotor is greater than or equal to the threshold value.2. The apparatus of claim 1 , wherein:the drive motor is operated in a WRSM (wound rotor synchronous motor) mode by the stator current and the rotor current when the temperature of the rotor is less than the threshold value.3. The apparatus of claim 1 , wherein:the drive motor is operated in a SynRM (synchronous reluctance motor) mode by the stator current when the temperature of the rotor is greater than or equal to the threshold value.4. The apparatus of claim 1 , further comprising:a memory which stores a first current map of the WRSM mode including stator current and rotor current corresponding to a torque of the drive motor and a second current map of the SynRM mode including stator current corresponding to the torque of the drive motor;wherein the ...

VERFAHREN UND VORRICHTUNG ZUR STEUERUNG DES BETRIEBS EINER ROTIERENDEN ELEKTRISCHEN MASCHINE MIT PERMANENTMAGNET

Verfahren, System und Vorrichtung zur Steuerung und Regelung des Betriebs einer rotierenden elektrischen Maschine mit Permanentmagnet mit einem Stator und einem Rotor, wobei ein erster Blindleistungsterm, der der elektrischen Maschine zugeordnet ist, auf der Grundlage der Spannung bestimmt wird, und ein zweiter Blindleistungsterm, der der elektrischen Maschine zugeordnet ist, auf der Grundlage des Flusses bestimmt wird. Eine erste Motortemperatur, die der elektrischen Maschine zugeordnet ist, wird auf der Grundlage des ersten und des zweiten Blindleistungsterms bestimmt, und die Leistungsabgabe von der elektrischen Maschine mit Permanentmagnet wird auf der Grundlage der ersten Motortemperatur gesteuert.

For determining rotor temperature method and device, the machine-readable carrier

METHOD FOR THERMAL PROTECTION OF AN ELECTRIC COMPRESSOR AND ASSOCIATED ELECTRIC COMPRESSOR

CONTROL DEVICE FOR AN ELECTRIC MACHINE, A VEHICLE, AND A METHOD

The invention relates to a control device for an electric machine with a stator and a rotor, comprising a temperature detection device which is designed to detect the temperature of the stator and the temperature of the rotor, as well as a calculation device which is designed to adjust the operating point of said electric machine on the basis of a specified torque, the detected temperature of the stator, the detected temperature of the rotor, and a predefined thermal load distribution of said stator and rotor. The invention also relates to a vehicle and to a corresponding method for controlling an electric machine. 11234. A control device () for an electric machine () including a stator () and a rotor () , the control device comprising:{'b': 5', '6', '1', '3', '6', '2', '4, 'a temperature detection device () which is configured to detect the temperature (-) of the stator () and the temperature (-) of the rotor (); and'}{'b': 7', '8', '2', '9', '6', '1', '3', '6', '2', '4', '10', '3', '4, 'including a computing device () which is configured to set the operating point () of the electric machine () based on a torque specification () and the detected temperature (-) of the stator () and the detected temperature (-) of the rotor () and a predefined distribution () for the thermal load of the stator () and the rotor ().'}2. The control device as claimed in claim 1 ,{'b': 7', '8', '11', '13', '1', '13', '3', '12', '13', '1', '13', '3, 'wherein the computing device () is configured to set the operating point () by calculating a d-axis component () of a current vector (- to -) and a q-axis component () of the current vector (- to -) in a field-oriented coordinate system.'}3. The control device as claimed in claim 2 ,{'b': 14', '15', '2', '16', '17', '30', '2', '11', '12', '13', '1', '13', '3, 'including a memory () which is configured to store a machine-specific characteristic curve field () for the electric machine (), which specifies the resulting motor current () and the ...

Electric motor and method for controlling the same

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, anda 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).

A method and an apparatus for determining a temperature of a rotor

A temperature of a rotor RT of an electric induction machine 1 is determined by comparing an actual stator flux saturation saliency angle ASA with a temperature-independent comparative stator flux saturation saliency angle CSA. A set of temperature-independent comparative stator flux saturation saliency angles in a reference frame is determined. An actual stator flux saturation saliency angle in the reference coordinate frame depending on a machine model MM comprising at least one rotor temperature-dependent parameter is determined. A temperature-independent comparative stator flux saturation saliency angle is determined. The rotor temperature is determined as the temperature which minimizes the deviation between the actual stator flux saturation saliency angle and the temperature-independent comparative stator flux saturation saliency angle. A preferable reference frame is a coordinate frame fixed to the stator current angle or to multiples thereof. A temperature-dependent rotor resistance ...

Control device for an electric machine, a vehicle, and a method

The invention relates to a control device for an electric machine with a stator and a rotor, comprising a temperature detection device which is designed to detect the temperature of the stator and the temperature of the rotor, as well as a calculation device which is designed to adjust the operating point of said electric machine on the basis of a specified torque, the detected temperature of the stator, the detected temperature of the rotor, and a predefined thermal load distribution of said stator and rotor. The invention also relates to a vehicle and to a corresponding method for controlling an electric machine.

INVERTER, ELECTRIC DRIVE, VEHICLE AND METHOD FOR CONTROLLING CONTROLLABLE SWITCHES OF AN INVERTER AND CORRESPONDING COMPUTER PROGRAM PRODUCT

The inverter (110) comprises input terminals (IT+, IT-), output terminals (OT), controllable switches (Q, Q') connected to the input terminals (IT+, IT-) and to the output terminals (OT) and a control device (116) configured to control the controllable switches (Q, Q') so as to convert a DC voltage at the input terminals (IT+, IT-) into an AC voltage at the output terminals (OT) intended to drive an asynchronous electric motor (108) to achieve a target torque (T*), selectively: in a first mode of operation in which the target torque (T*) is determined according to a torque determination method, and in response to a rotor temperature (Tr), in a second mode of operation in which losses in the rotor are decreased relative to the first mode of operation while the target torque (T*) remains determined according to the torque determination method of the first mode of operation.

A method and an apparatus for determing a temperature of a rotor

Inverter control device and air conditioner

An inverter control device controls an inverter unit for converting the DC voltage from a converter unit to an AC voltage and supplying the AC voltage to a DC electric motor in order to perform control that follows an operation condition in a control for preventing the operation of the DC electric motor from being stopped due to step-out. The inverter control device is provided with: a storage unit for storing information about a step-out limit; a step-out limit current calculation unit for calculating the limit value of step-out limit current on the basis of the magnet temperature of the DC electric motor, a bus voltage applied to the inverter unit, and the information about the step-out limit; and a control unit for comparing a primary current input to the converter unit with the limit value and for, when the primary current exceeds the limit value, outputting a command for adjusting the operation frequency of the DC electric motor so that the primary current becomes less than or equal ...

ELECTRIC MOTOR AND METHOD FOR CONTROLLING THE SAME

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).

The motor temperature changes minimize the impact device and method

TEMPERATURE ESTIMATION OF STEP MOTOR BASED ON SENSING VOLTAGE THEREOF

An image forming apparatus and an image forming method are provided. The image forming apparatus includes a printing engine to form an image, a step motor to drive the printing engine, a driving circuit to provide a constant current to the step motor and sense a voltage corresponding to a magnitude of the constant current provided to the step motor, and a processor to calculate a temperature of the step motor based on the voltage sensed by the driving circuit during an excitation period of the step motor and control an operation of the image forming apparatus based on the calculated temperature. 1. An image forming apparatus , comprising:a printing engine to form an image;a step motor to drive the printing engine; provide a constant current to the step motor, and', 'sense a voltage corresponding to a magnitude of the constant current provided to the step motor; and, 'a driving circuit to calculate a temperature of the step motor based on the voltage sensed by the driving circuit during an excitation period of the step motor, and', 'control an operation of the image forming apparatus based on the calculated temperature., 'a processor to2. The image forming apparatus as claimed in claim 1 , wherein the excitation period is at least one of a prior-excitation period claim 1 , a post-excitation period claim 1 , or a holding period.3. The image forming apparatus as claimed in claim 1 , wherein the processor:performs a printing job requested in a normal mode based on the calculated temperature being within a predetermined first temperature section, andperforms a printing job requested in a stress mode in which at least one of a number of consecutive prints and a printing speed is reduced based on the calculated temperature being within a second temperature section higher than the predetermined first temperature section.4. The image forming apparatus as claimed in claim 3 , wherein the processor does not perform a requested printing job based on the calculated temperature ...

DRIVE DEVICE FOR PERMANENT-MAGNET SYNCHRONOUS MACHINE, TORQUE COMPENSATION METHOD FOR PERMANENT-MAGNET SYNCHRONOUS MACHINE, AND ELECTRIC VEHICLE

A drive device for a permanent-magnet synchronous machine has a power converter 102 that drives a permanent-magnet synchronous machine 103, and a controller 101 that controls the power converter 102. The controller 101 comprises: a torque correction unit 110 that corrects an inputted torque command value; and a current command calculation unit 111 that generates, on the basis of the torque command value corrected by the torque correction unit 110, a current command value for controlling driving of the permanent-magnet synchronous machine 103. The torque correction unit 110 corrects the torque command value on the basis of a value associated with the magnetic flux of the permanent-magnet synchronous machine 103, and the current command value generated by the current command calculation unit 111.

Diagnosis and prognosis of rotor thermal sensitivity

Sprayer thermal protection

Electric motor and method for controlling the same

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).

Apparatus and method for minimizing influence of temperature change in motor

AC ROTARY MACHINE APPARATUS

With the object of preventing deterioration due to the temperature when charging a secondary battery, a configuration is such that currents are controlled so as to be caused to flow equally through the respective phases of three-phase coils of a second group which configure an AC rotary machine body, whereby a large current is caused to flow for a short time, causing the secondary battery to rise in temperature, even when the AC rotary machine body is in a state of rest. 13-. (canceled)4. An AC rotary machine apparatus , comprising:an AC rotary machine body which has a magneto rotor and has first three-phase coils and second three-phase coils for generating rotating magnetic fields in the rotor;a secondary battery which supplies power to the first and second three-phase coils; anda power conversion device which converts direct current generated by the secondary battery to alternating currents, whereinthe rotary torque of the AC rotary machine body is controlled by controlling the alternating currents generated by the power conversion device, the apparatus being characterized in thatthe power conversion device, including a temperature sensor provided on the AC rotary machine apparatus, is configured so that when it is determined, based on temperature information of the temperature sensor, to need a rise in temperature, three-phase alternating currents which are of the same magnitude as and different in phase by 180 degrees from those of the U-phase, V-phase, and W-phase of the first three-phase coils are respectively supplied to the X-phase, Y-phase, and Z-phase of the second three-phase coils in the AC rotary machine body.5. The AC rotary machine apparatus according to claim 4 , characterized in thatthe U-phase, V-phase, and W-phase of the first three-phase coils and the X-phase, Y-phase, and Z-phase of the second three-phase coils in the AC rotary machine body are disposed around the rotor with a phase difference of 120 degrees between the U-, V-, and W-phases and ...

Indirect rotor resistance estimation system and method

Indirect rotor resistance estimation for an AC induction motor is achieved by successively stepping the quadrature command to zero and the direct current command to a predetermined value causing the quadrature stator voltage to decay as a representation of rotor current decay; defining, in response to the decaying stator voltage reaching two spaced thresholds, a voltage/time difference, and retrieving from a storage device the rotor resistance associated with the voltage/time difference.

Shaft Mounted Monitor for Rotating Machinery

Disclosed herein is a shaft-mounted monitor for monitoring conditions of a rotating shaft using a calculated rotational component of the rotating shaft. The monitor may include a sensor such as an accelerometer, thermal sensor, strain gauge, or the like. In various embodiments, a variety of parameters relating to the rotating shaft may be monitored, such as a temperature, rotational speed, angular position, torque, power, frequency, or the like. The monitor may include a wireless transmitter to transmit the monitored condition of the rotating shaft to an intelligent electronic device or a monitoring system.

MOTOR VEHICLE

The motor vehicle comprises an overcurrent detector configured to detect overcurrent in each of a plurality of second switching elements included in the second inverter. When the motor vehicle has an abnormality and is driven by the emergency drive with output of a torque from the first motor to the one wheels, the motor vehicle performs zero torque control that controls the second inverter such that a torque of the second motor becomes equal to zero.

METHOD AND DEVICE FOR CONTACTLESSLY SENSING THE TEMPERATURE OF A ROTATING PART OF AN ELECTRICAL MACHINE

Rotortemperaturbestimmungsvorrichtung für einen Elektromotor und Überhitzungsschutzvorrichtung für einen Elektromotor

Eine Rotortemperaturbestimmungsvorrichtung für einen Elektromotor der vorliegenden Erfindung umfasst einen Leistungsberechner, der dazu ausgebildet ist, die Leistung eines Elektromotors zu berechnen; einen Umdrehungsgeschwindigkeitsdetektor, der dazu ausgebildet ist, die Umdrehungsgeschwindigkeit des Elektromotors zu erkennen; einen Speicher, der dazu ausgebildet ist, Koeffizienten, die von der Umdrehungsgeschwindigkeit abhängen, zu speichern; und einen Rotortemperaturschätzer, der dazu ausgebildet ist, auf Basis der Leistung und des Koeffizienten die Temperatur eines Rotors des Elektromotors zu schätzen.

Method of controlling a brushless motor for preheating

A method of controlling a brushless motor comprises sensing a temperature, using the sensed temperature to define a current limit, and sequentially energising and de-energising a winding of the motor. The winding is de-energised in response to current in the winding exceeding the current limit. A lower current limit is then defined for a lower sensed temperature. The current limit may be increased after a period of time or in response to an increase in the sensed temperature. The motor may be unidirectional and the phase winding may be energised in a direction that drives the motor backwards. By sequentially energising and de-energising a phase winding, power losses (e.g. copper losses, iron losses and switch losses) act to pre-heat the motor. By employing a lower current limit at lower temperatures, the power losses are smaller and thus thermal shock, which might otherwise damage components of the motor, may be avoided.

Rotor temperature monitoring method and system for permanent magnet

The actuator control device and control method

Motor control method

A motor control method, wherein a composite permanent magnet has a core part and a shell part, the Curie temperature of one of the core part and the shell part is Tc1 K, and the Curie temperature of another is Tc2 K, and wherein when the magnitude of the reluctance torque is equal to or greater than the magnitude of the magnet torque, the temperature of the composite permanent magnet is set at Ts K that is (Tc1−100) K or higher and lower than Tc2 K and when the magnitude of the reluctance torque is less than the magnitude of the magnetic torque, the temperature of the composite permanent magnet is set at lower than the temperature Ts K or Tc1 K, whichever is lower.

Method and apparatus for estimating induction motor rotor temperature

A method and apparatus to provide continuous and reliable rotor temperature estimates for line-connected induction motors during steady-state and/or dynamic motor operations. Rotor temperature is calculated from voltage and current measurements without any temperature or speed sensors. First, complex space vectors are synthesized from voltage and current measurements. Second, the instantaneous rotor speed is detected by calculating the rotational speed of a single rotor slot harmonic component with respect to the rotational speed of the fundamental frequency component. Third, the positive sequence fundamental frequency components are extracted from complex space vectors. Fourth, the rotor time constant is estimated in a model-reference adaptive system based on a dynamic induction motor equivalent circuit model. Finally, the rotor temperature is calculated according to the linear relationship between the rotor temperature and the estimated rotor time constant. Real-time induction motor thermal ...

BRUSHLESS MOTOR AND MOTOR CONTROL DEVICE

Sprayer thermal protection

In an electric airless sprayer ( 16 ), as the motor ( 14 ) temperature approaches allowable limits, several performance cutbacks can be used to prevent overheating. The preferred method is to gradually reduce the controlled pressure. If the temperature continues to rise, the control ( 20 ) switches to on/off or deadband control. If the temperature continues to rise in spite of these measures, the control ( 20 ) shuts the unit down.

Bestimmung der Rotortemperatur einer elektrischen Maschine

Verfahren zur Bestimmung der Rotortemperatur einer elektrischen Maschine mit einem Rotor, insbesondere einer Asynchronmaschine, umfassend die Verfahrensschritte a. Bestimmung einer Soll-Spannung der elektrischen Maschine mit Hilfe eines Maschinenmodells mittels einer Datenverarbeitungseinrichtung, b. Messung einer Ist-Spannung der elektrischen Maschine mittels einer Messeinrichtung, c. Berechnung einer Spannungsdifferenz zwischen der Soll-Spannung und der Ist-Spannung mittels der Datenverarbeitungseinrichtung, d. Berechnung eines realen Rotorwiderstands und/oder einer realen Rotortemperatur mit Hilfe der Spannungsdifferenz und mittels der Datenverarbeitungseinrichtung. e.

Apparatus and method for minimizing influence of temperature change in motor

An apparatus for minimizing an influence of a temperature change may include a motor, a temperature sensor for sensing a temperature of the motor to create the temperature information, a command compensation unit compensating a torque command or a magnetic flux demand according to the information on the sensed temperature to create a compensation torque command value or a compensation magnetic flux command value, and an inverter for driving the motor according to a D-axis voltage command value and a Q-axis voltage command value are created according to a D-axis current command value and a Q-axis current command value which are matched with the compensation torque command value or the compensation magnetic flux command value.

Slip-dependent motor model

The present disclosure pertains to systems and methods configured to monitor and protect an electric motor during startup using a motor model. The motor model parameters may be calculated using measurements taken during a calibration start of the electric motor. The measurements may include slip, stator current, stator voltage, frequency, and/or other electrical or physical parameters. In some embodiments, the motor model parameters may be calculated by minimizing the difference between a measured slip and a calculated slip. The motor model may comprise a variety of parameters used to determine operation parameters of the motor during the startup. In one specific embodiment, the motor model may determine a thermal capacity used (TCU). The TCU may be compared to a threshold value to determine whether protective action is necessary.

ELECTRONIC APPARATUS AND METHOD OF CONTROLLING ELECTRIC MOTOR MOUNTED IN ELECTRONIC APPARATUS

An electronic apparatus includes: a timer member that clocks time on the basis of the power supplied from a power source. A power supply member supplies the power to an electric motor of the electronic apparatus and to the timer member from the power source and interrupts the power supply thereto. A heat storage calculating member calculates heat storage of the electric motor and calculates heat storage of the electric motor after stop of the drive on the basis of the time clocked by the timer member. A controller controls the electric motor and controls the power supply member by initiating power-on and power-off operations. This is performed so as to maintain the power supply to the timer member and the heat storage calculating member during a predetermined time, even after the power-off operation of the operation member.

Elektrische Maschine

Elektrische Maschine mit einer Einrichtung (110) zur Ermittlung einer Temperatur eines Rotors (114), wobei die Einrichtung (110) einen am Stator (118) oder an einem Gehäuse (120) der elektrischen Maschine vorgesehenen Primärkreis (122) mit einer Primärspule (130) und einen am Rotor (114) ausgebildeten Sekundärkreis (124) mit einer Sekundärspule (136) und einer temperaturabhängigen Last (138) umfasst. Die Einrichtung (110) ist eingerichtet, bei einer Einspeisung der Signalspannung in den Primärkreis (122) durch eine induktive Kopplung zwischen dem Primärkreis (122) und dem Sekundärkreis (124) eine Sekundärspannung in dem Sekundärkreis (124) zu induzieren, wodurch ein durch die temperaturabhängige Last (138) fließender Sekundärstrom Isekundär im Sekundärkreis und infolge des Sekundärstroms Isekundärein rotortemperaturabhängiger Primärstrom Iprimärim Primärkreis (122) bewirkt wird. Die Einrichtung (110) ist weiterhin eingerichtet, mittels der Messvorrichtung (126) den Primärstrom Iprimärund ...

Sprayer thermal protection

In an electric airless sprayer (16), as the motor (14) temperature approaches allowable limits, several performance cutbacks can be used to prevent overheating. The preferred method is to gradually reduce the controlled pressure. If the temperature continues to rise, the control (20) switches to on/off or deadband control. If the temperature continues to rise in spite of these measures, the control (20) shuts the unit down.

Control device and method for brushless motor

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

APPARATUS AND METHOD FOR MINIMIZING INFLUENCE BY TEMPERATURE CHANGE IN MOTOR

The present invention relates to a three-phase motor and, more specifically, to an apparatus and a method for minimizing an influence by the temperature change in a motor to increase the efficiency of a motor and the torque accuracy by reflecting a real-time control of the temperature change in a motor by using a permanent magnet. The apparatus comprises: a motor; a temperature sensor for generating temperature information; a compensation unit for generating a compensation torque command value or a compensation magnetic flux command value; a D-axis current command table for generating a D-axis current command value; a Q-axis current command table for generating a Q-axis current command value; a current controller for generating a D-axis voltage command value and a Q-axis voltage command value; and an inverter for driving the motor. COPYRIGHT KIPO 2016 (111-1) Torque command compensator (111-3) Magnetic flux command compensator (111-5) Magnetic flux table (111-7) Second coordinate converter ...

Verfahren zur Bestimmung einer Temperatur eines Motors für ein Kraftfahrzeug

Verfahren zur Bestimmung einer Temperatur eines Motors (2) für ein Kraftfahrzeug (1), umfassend zumindest die folgenden Verfahrensschritte:a) Empfangen mindestens eines Schwingungssignals (5), das eine Schwingung zumindest eines Teils des Motors (2) charakterisiert,b) Bestimmen eines ersten Wertes der Temperatur des Motors (2)) in Abhängigkeit des Schwingungssignals (5).

Verfahren und Steuergerät zum Betreiben eines Elektromotors

Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Betreiben eines Elektromotors (102), dadurch gekennzeichnet, dass in einem Schritt des Schätzens ein erster Schätzwert (118) und ein zweiter Schätzwert (120) geschätzt werden, wobei der erste Schätzwert (118) eine unter Verwendung eines ersten Temperaturmodells (114) eines Rotors (110) des Elektromotors (102) geschätzte Temperatur des Rotors (110) repräsentiert und der zweite Schätzwert (120) ebenfalls die geschätzte Temperatur des Rotors (110) unter Verwendung eines zweiten Temperaturmodells (116) des Rotors (110) repräsentiert, wobei in einem Schritt des Koppelns der erste Schätzwert (118) und der zweite Schätzwert (120) miteinander gekoppelt werden, um einen Überwachungswert (124) und einen Regelwert (126) zu erhalten, wobei in einem Schritt des Einstellens ein Grenzwert (130) für eine Energiezufuhr zu dem Elektromotor (102) unter Verwendung des Überwachungswerts (124) eingestellt wird und in einem Schritt des Regelns die Energiezufuhr ...

Motor control device

ELECTRIC MACHINE

The invention relates to an electric machine ( 101 ) comprising a stator ( 103 ), a rotatably mounted rotor ( 105 ) having a magnetizable and coolable rotor section ( 107 ) made of a super-conducting material ( 417 ), a control unit ( 109 ) designed to control a stator flow for inducing a magnetic flow through the superconducting material ( 417 ). The invention also relates to a method for operating an electric machine ( 101 ).

Power share converter for connecting multiple energy storage systems

A system comprises a plurality of power converters, a plurality of energy storage systems, a first common node, a second common node, and zero-reference voltage node. Each power converter is coupled between one energy storage system and the first and second common nodes. The system operates to regulate power between the power converters and the first and second common nodes. Each power converter is a bi-directional power converter and each energy storage system is a battery pack. In one example, the first common node is regulated to a voltage VSPAN, and the second common node is regulated to a voltage VSCN which is the mean of all voltages output by the battery packs. In another example, the first common node is regulated to a voltage −VSPAN, and the second common node is regulated to a voltage +VSPAN. No power converter processes more than voltage VSPAN yielding high-efficiency power conversion.

Überhitzungsschutzvorrichtung für einen Elektromotor

Überhitzungsschutzvorrichtung (20, 21) für einen Elektromotor (5), umfassend: einen Stromdetektor (16), der dazu ausgebildet ist, einen Stromwert des Stroms, der zu dem Elektromotor (5) geführt wird, zu erkennen;einen Umdrehungsgeschwindigkeitsdetektor (12), der dazu ausgebildet ist, eine Umdrehungsgeschwindigkeit des Elektromotors (5) zu erkennen;einen Speicher (14), der dazu ausgebildet ist, Koeffizienten, die von der Umdrehungsgeschwindigkeit abhängen, zu speichern;einen Rotortemperaturschätzer (13), der dazu ausgebildet ist, auf Basis des Stromwerts, der Umdrehungsgeschwindigkeit und des Koeffizienten die Temperatur eines Rotors (52) des Elektromotors (5) zu schätzen; undeine Überhitzungsbestimmungseinheit (15), die dazu ausgebildet ist, aus der Rotortemperatur, die durch den Rotortemperaturschätzer (13) geschätzt wurde, zu bestimmen, ob sich der Elektromotor (5) in einem überhitzten Zustand befindet,wobei die Überhitzungsbestimmungseinheit (15) dann, wenn die Umdrehungsgeschwindigkeit ...

Verfahren zur Detektion einer thermischen Überlastsituation bei einem Elektrohandwerkzeug

Bei einem Verfahren zur Detektion einer thermischen Überlastsituation bei einem Elektrohandwerkzeug wird die Temperatur oder eine mit der Temperatur eines Bauteils korrelierende Zustandsgröße gemessen, wobei im Falle einer thermischen Überlastung ein reduzierter Übergangsbetrieb aktiviert wird, in welchem der Stromfluss im Stromkreis moduliert wird.

Rotor temperature monitoring process for electrical machine involves detecting temperature, altering winding setting and detecting stand current

The monitoring process for an electrical machine (1) involves detecting the running temperature of an element of the rotor (5) having a temperature sensitive element (13) and a winding (12), and electrically switching the winding depending on the detected rotor temperature. the stand winding current is adjusted accordingly and detected to provide information on the rotor temperature.

Vorrichtung und Verfahren zum Minimieren des Einflusses einer Temperaturveränderung in einem Motor

Eine Vorrichtung zum Minimieren eines Einflusses einer Temperaturveränderung kann aufweisen: einen Motor, einen Temperatursensor zum Detektieren einer Temperatur des Motors zwecks Erzeugens der Temperaturinformation, eine Befehlskompensationseinheit zum Kompensieren eines Drehmoment-Befehls oder eines Magnetfluss-Befehls entsprechend der Information über die detektierte Temperatur, um einen Kompensations-Drehmoment-Befehls-Wert oder einen Kompensations-Magnetfluss-Befehls-Wert zu erzeugen, und einen Invertierer zum Steuern des Motors entsprechend einem D-Achsen-Spannungs-Befehls-Wert und einem Q-Achsen-Spannungs-Befehls-Wert, die entsprechend einem D-Achsen-Strom-Befehls-Wert und einem Q-Achsen-Strom-Befehls-Wert erzeugt werden, die mit dem Kompensations-Drehmoment-Befehls-Wert oder dem Kompensations-Magnetfluss-Befehls-Wert abgestimmt sind.

Rechargeable electric power tool

A rechargeable electric power tool includes a motor driven by a secondary battery, a switching element for regulating power distribution to the motor, a motor control unit for controlling rotation of the motor through the switching element, a lead wire for supplying a drive current to the motor therethrough and a trigger switch changed over by a user for turning on or off the drive current supplied to the motor through the lead wire. In the rechargeable electric power tool, upon changeover of the trigger switch, a microcomputer determines a magnitude relation between a detected temperature outputted from a first thermistor and a first temperature threshold value. If the detected temperature is determined to be greater than the first temperature threshold value, the microcomputer is set ina limited operation mode in which a revolution number of the motor is limited to a predetermined value or less.

모터 제어 장치

... 코일 온도 추정부(12)는, 미리 주어진 모터(1)의 코일 등가 저항, 열용량 및 열저항, 및 전압 검출 회로(17)가 검출하는 모터(1)에의 인가 전압 및 외부 입력되는 Duty비 지령치에 의거하여, 모터(1)의 코일 온도를 추정한다. 온도 이상 판정부(13)에 의해 코일 온도가 정상 온도가 아니라고 판정된 경우, Duty 제한부(14)가 Duty비 지령치를 낮은 값으로 제한하고 나서 FET 구동 회로(15)에 출력한다.

Rotor resistance based motor thermal protection

Motor overload protection device is equipped with a thermal monitor that can determine expected rotor temperature rise from rotor resistance estimates. The thermal monitor determines expected rotor temperature rise by using a correlation between rotor temperature rise computed from rotor resistance estimates, and motor thermal state estimates. The correlation can be derived by fitting a line to a plurality of points, with each point defined by an ordered pair composed of a rotor temperature rise estimate and a corresponding motor thermal state estimate, and determining a slope of the line. This rotor temperature slope can then be used by the thermal monitor to determine a rotor temperature rise given a rotor resistance estimate and a corresponding motor thermal state estimate. If the rotor temperature rise exceeds an expected rotor temperature rise by more than a predefined threshold, the thermal monitor issues an alarm and/or takes corrective actions in some embodiments.

MAGNET TEMPERATURE INFORMATION OUTPUT DEVICE AND ROTATING ELECTRICAL MACHINE

A magnet temperature information output device is disposed on a rotating electrical machine including a stator and a rotor with a permanent magnet, and is arranged to output temperature information regarding a temperature of the permanent magnet. The magnet temperature information output device includes an element arranged to detect a magnetic flux and output an electrical signal responding to the detected magnetic flux as the temperature information. The element is disposed on the stator.

VORRICHTUNG ZUM STEUERN EINES ANTRIEBSMOTORS EINES FAHRZEUGS UND VERFAHREN, DAS DIE GLEICHE VERWENDET

Vorrichtung (200) zum Steuern eines Antriebsmotors (100) eines Fahrzeugs und Verfahren, das die Gleiche verwendet, wobei die Vorrichtung (200) zum Steuern des Antriebsmotors (100) des Fahrzeugs, in welchem ein Synchronmotor (100) mit gewickeltem Rotor (120) montiert ist, aufweist: einen Inverter (210), welcher einen Stator-Strom (Id, Iq), der einem Stator (110) des Antriebsmotors (100) zugeführt wird, und einen Rotor-Strom (Ir) steuert, der einem Rotor (120) des Antriebsmotors (100) zugeführt wird, und eine Antriebsmotor-Steuerungsvorrichtung (230), welche den Inverter (210) steuert, so dass der Stator-Strom (Id, Iq) und der Rotor-Strom (Ir) zu dem Antriebsmotor (100) geliefert werden, wenn eine Temperatur des Rotors (120) geringer ist als ein Schwellwert, und nur der Stator-Strom (Id, Iq) zu dem Antriebsmotor (100) geliefert wird, wenn die Temperatur des Rotors (120) größer ist als oder gleich ist wie der Schwellwert.

Verfahren zum Bestimmen einer Temperatur eines Rotors

Die Erfindung betrifft ein Verfahren zum Bestimmen einer Temperatur TR eines Rotors (6) einer Elektromaschine (2), der relativ zu einem Stator (4) der Elektromaschine (2) drehbar ist, wobei als Betriebsparameter der Elektromaschine (2) eine am Stator (4) anliegende Spannung US, ein durch den Stator (4) fließender Strom IS, eine Drehfrequenz ωR des Rotors (6), eine Drehfeldfrequenz ωS des Stators (4), eine Induktivität LR des Rotors (6), eine Induktivität LS des Stators (4) und eine Hauptinduktivität LH der Elektromaschine (2) ermittelt werden, wobei aus Werten dieser Betriebsparameter ein Wert eine elektrischen Widerstands RR des Rotors (6) nach:berechnet wird, wobei ein Wert der Temperatur TR des Rotors (6) in Abhängigkeit des elektrischen Widerstands RR des Rotors (6) ermittelt wird.

METHOD AND DEVICE FOR DETERMINING A ROTOR TEMPERATURE, COMPUTER PROGRAM, AND COMPUTER PROGRAM PRODUCT

The invention relates to a method for determining a rotor temperature of an electric motor, in particular an asynchronous motor, the rotor temperature being determined at least in accordance with reactive powers and/or in accordance with losses of the electric motor. A first rotor temperature is determined in accordance with the reactive powers and, depending on an operating range of the electric motor, plausibility-checked or replaced by a second rotor temperature, which is determined in accordance with the losses. 1. A computer-implemented method for determining a rotor temperature of an electric machine , the method comprising:determining a first rotor temperature as a function of reactive powers,determining a second rotor temperature as a function of losses of the electrical machine, anddepending on an operating range of the electric machine, checking a plausibility of the first rotor temperature or replacing the first rotor temperature by a second rotor temperature.2. The method as claimed in claim 1 , characterized in that the first rotor temperature in a part-load operating range is replaced by the second rotor temperature.3. The method as claimed in claim 1 , characterized in that system-dependent errors are ascertained and stored in a characteristic map as a function of at least one reactive power for the determination of the first rotor temperature.4. The method as claimed in claim 1 , characterized in that the second rotor temperature is plausibility-checked by the first rotor temperature.5. The method as claimed in claim 1 , characterized in that the system-dependent errors are measured before the start-up of the electric machine.6. The method as claimed in claim 1 , characterized in that the first rotor temperature is replaced by the second rotor temperature when the electric machine is stopped claim 1 , wherein the electric machine is excited with an alternating current in order to determine an electric resistance of the electric machine claim 1 , and ...

Electric motor and method for controlling the same

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 ).

Rotor temperature estimation for an electric vehicle

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

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

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.

System and method for controlling motor

Provided are a system for controlling a motor and a method thereof. The system includes: a data storage unit in which data relating to a thermal equivalent circuit of the motor is stored; a temperature measuring unit which measures a temperature of a cooling medium which enters a cooling flow path portion; a rotation speed measuring unit which measures a rotation speed of a rotor; a driving electric current measuring unit which measures a driving electric current of the motor; a permanent magnet temperature estimating unit which estimates a temperature of the permanent magnet portion of the rotor; and a driving controller controls driving of the motor.

Slip-Dependent Motor Model

The present disclosure pertains to systems and methods configured to monitor and protect an electric motor during startup using a motor model. The motor model parameters may be calculated using measurements taken during a calibration start of the electric motor. The measurements may include slip, stator current, stator voltage, frequency, and/or other electrical or physical parameters. In some embodiments, the motor model parameters may be calculated by minimizing the difference between a measured slip and a calculated slip. The motor model may comprise a variety of parameters used to determine operation parameters of the motor during the startup. In one specific embodiment, the motor model may determine a thermal capacity used (TCU). The TCU may be compared to a threshold value to determine whether protective action is necessary. 1. A system configured to generate a slip-dependent motor model to monitor and protect an electric motor during a motor start , comprising:an electrical measurement input to monitor at least one electrical condition of electrical energy supplied to the electric motor;a slip input configured to monitor a measured slip of the electric motor; generate a motor model based on the at least one electrical condition and the measured slip during a calibration motor start;', 'measure the at least one electrical condition of the motor during a subsequent motor start;', 'determine a calculated slip of the motor during the subsequent start based on the at least one electrical condition and the motor model.', 'implement a control action based on the calculated slip and the motor model., 'a processor in communication with the electrical measurement input and the slip input and configured to2. The system of claim 1 , wherein the electric motor comprises a synchronous motor.3. The system of claim 1 , wherein the at least one measured electrical condition comprises one of an electric current claim 1 , and an electric voltage.4. The system of claim 1 , ...

MONITORING SOLUTION FOR A CONVEYOR SYSTEM

The present invention relates to a conveyor system comprising: a drive machine, a conveyor control unit configured to control operation of a conveyor device, a sensor array comprising at least one sensor mounted to the drive machine and adapted to measure one or more properties of the drive machine, a processing unit associated with the drive machine, wherein the processing unit is connected to the sensor array and configured to obtain and process measurement data from the sensor array to generate in-formation about an operation of the drive machine, and a communication channel between the conveyor control unit and the processing unit. The conveyor system may be an elevator system, an escalator system or a moving walk system. 1. A conveyor system wherein the conveyor system comprises:a drive machine,a conveyor control unit configured to control operation of a conveyor device,a sensor array comprising a plurality of sensors mounted to the drive machine and adapted to measure different properties of the drive machine,a processing unit associated with the drive machine and comprising a sensor fusion portion, wherein the processing unit is connected to the sensor array and configured to obtain and process measurement data from the sensor array so as to determine, by the sensor fusion portion of the processing unit at least one operational parameter of the drive machine from the measurement data obtained from the plurality of sensors of the sensor array to generate information about an operation of the drive machine, anda communication channel between the conveyor control unit and the processing unit.2. The conveyor system of claim 1 , wherein the processing unit is configured to send to the conveyor control unit a data message containing information about the operation of the drive machine.3. The conveyor system of claim 1 , wherein the processing unit is configured to detect a non-optimal operation of the drive machine by detecting a deviation of the at least one ...

CONTROLLER FOR PERMANENT MAGNET SYNCHRONOUS MOTOR, IMAGE FORMING APPARATUS, AND CONTROL METHOD

A controller for a permanent magnet synchronous motor includes an estimating portion configured to determine an estimated value of a rotational speed of the rotor and an estimated value of a position of magnetic poles of the rotor based on a value of the current detected by the current detector and a parameter value indicating an interlinkage magnetic flux caused by the permanent magnet across the winding; a control unit configured to control the drive portion to cause the rotating magnetic field based on the estimated value of the rotational speed and the estimated value of the position of the magnetic poles; and a correction portion configured to correct the parameter value indicating the interlinkage magnetic flux based on correction information, the correction information being determined based on a temperature of the winding and a relationship between the temperature of the winding and a temperature of the permanent magnet. 1. A controller for a permanent magnet synchronous motor having a rotor using a permanent magnet , the rotor rotating by a rotating magnetic field caused by a current flowing through a winding , the controller comprising:a drive portion configured to apply a current to the winding to drive the rotor;a current detector configured to detect the current flowing through the winding;an estimating portion configured to determine an estimated value of a rotational speed of the rotor and an estimated value of a position of magnetic poles of the rotor based on a value of the current detected by the current detector and a parameter value indicating an interlinkage magnetic flux caused by the permanent magnet across the winding;a control unit configured to control the drive portion to cause the rotating magnetic field based on the estimated value of the rotational speed and the estimated value of the position of the magnetic poles; anda correction portion configured to correct the parameter value indicating the interlinkage magnetic flux based on ...

Method and apparatus for monitoring a permanent magnet electric machine

A controller-implemented method for monitoring a permanent magnet electric machine includes determining a threshold direct-axis (d-axis) current corresponding to inception of irreversible demagnetization of the permanent magnet based upon material properties of a permanent magnet mounted in a rotor of the PM electric machine and a temperature of the permanent magnet. A d-axis current associated with controlling the PM electric machine is determined, and a state of health of the PM electric machine is determined based upon the threshold d-axis current and the monitored d-axis current.

SYSTEM STATE PREDICTION

A method includes the following steps: observing a first state vector including state variables in a physical system A; determining a first prediction vector based on the first state vector, with a data driven model for system A; determining a second prediction vector based on the first state vector, with a physics based model for system A; training a prediction fusion operator to determine a third prediction vector based on the first and second prediction vectors; validating the prediction fusion operator on the third prediction vector and another first state vector, the other first state vector concerning the same time as the third prediction vector. 1. A method comprising the following steps:observing a first state vector comprising state variables in a physical system A;determining a first prediction vector based on the first state vector, with a data driven model for system A;determining a second prediction vector based on the first state vector, with a physics based model for system A;training a prediction fusion operator to determine a third prediction vector based on the first prediction vector and the second prediction vector;validating the prediction fusion operator on the third prediction vector and an other first state vector, the other first state vector concerning a same time as the third prediction vector.2. The method of claim 1 , further comprising the following steps:observing a second state vector comprising state variables in a physical system B which is different from but similar to the physical system A;determining a fourth prediction vector based on the second state vector, with a data driven model for system B;determining a sixth prediction vector based on the second state vector, with a surrogate of the physics based model; anddetermining a fifth prediction vector based on the fourth prediction vector and the sixth prediction vector, with the prediction fusion operator that is based on the system A.3. The method according to claim 2 , ...

THREE PHASE DUPLEXING MOTOR FOR ELECTRIC POWER STEERING APPARATUS

To provide a three phase duplexing motor for electric power steering apparatus that can manage increase in a supply current and can manage influence on motor, when increasing a supply current to the three phase windings of the normal set. An three phase duplexing motor for electric power steering apparatus sets 0 to a supply current to three phase winding of abnormality occurrence set, and increases a supply current to three phase windings of the normal set, with a preliminarily set increase upper limit current value as an upper limit. 1. A three phase duplexing motor for an electric power steering apparatus comprising:a motor which is provided with a stator equipped with 2 sets of three phase windings, and a rotor equipped with a permanent magnet, and drives a steering mechanism of a vehicle;2 sets of inverters which supply AC power to each set of the three phase windings; anda controller which controls the 2 sets of inverters,wherein when abnormality occurs in a control system of the three phase windings of one set, the controller sets 0 to a supply current to the three phase windings of an abnormality occurrence set, and increases a supply current to the three phase windings of a normal set more than normal time, with a preliminarily set increase upper limit current value as an upper limit.2. The three phase duplexing motor for the electric power steering apparatus according to claim 1 , wherein the increase upper limit current value is set to a rated current value of the three phase windings of each set.3. The three phase duplexing motor for the electric power steering apparatus according to claim 1 , wherein the increase upper limit current value is preliminarily set to a maximum value of a supply current range in which a demagnetizing factor of the permanent magnet becomes less than or equal to a preliminarily set allowable demagnetizing factor at a maximum service temperature of the motor.4. The three phase duplexing motor for the electric power steering ...

CONTROL DEVICE FOR ACTUATOR, ACTUATOR, VALVE DRIVING DEVICE AND CONTROL METHOD FOR ACTUATOR

A position sensor mounted in an actuator includes a magnetic detecting element for detecting the position of a shaft, and a temperature detecting element for detecting intra-sensor temperature which is used for correction of the temperature characteristics of the magnetic detecting element, the magnetic detecting element and the temperature detecting element being built therein. A control device for the actuator acquires both the temperature-corrected position of the shaft and the intra-sensor temperature from the position sensor, and uses them for control of the actuator. 16.-. (canceled)7. A control device for an actuator , the actuator including a shaft , a direct-current motor for causing the shaft to reciprocate in an axial direction , and a position sensor for detecting a position of the shaft , the control device comprising:an acquirer to acquire both the position of the shaft which is temperature-corrected by using intra-sensor temperature detected by a temperature detecting element built in the position sensor, and the intra-sensor temperature; anda controller to control the actuator by using both the temperature-corrected position of the shaft and the intra-sensor temperature which are acquired by the acquirer.8. The control device for the actuator according to claim 7 , further comprising a coil temperature estimator to estimate a temperature of a coil of the direct-current motor claim 7 , anda temperature corrector to correct the temperature of the coil estimated by the coil temperature estimator by using the intra-sensor temperature acquired by the acquirer, andwherein the controller controls the actuator by using both the temperature-corrected position of the shaft acquired by the acquirer, and the temperature corrected by the temperature corrector.9. The control device for the actuator according to claim 7 , further comprising an abnormality determiner to determine that internal temperature of the actuator is abnormal when the intra-sensor temperature ...

CONTROLLER FOR ROTARY ELECTRIC MACHINE

To provide a controller for rotary electric machine which can estimate a transitional temperature with good accuracy, while considering the heating amount and the heat radiation amount due to copper loss and iron loss which change according to the operating point of rotational speed and torque, and suppressing the increase in arithmetic load. A controller for rotary electric machine, at calculation timing of every estimation calculation period, by referring to a temperature prediction data in which a relationship among a rotational speed, a torque information, a temperature at a reference time point, and a temperature after lapse of the estimation calculation period from the reference time point, calculates an estimation value of temperature after lapse of the estimation calculation period from the last time calculation timing, corresponding to the present rotational speed, the present torque information, and the estimation value of temperature calculated at the last time calculation timing. 1. A controller for rotary electric machine ,at calculation timing of every preliminarily set estimation calculation period,by referring to a temperature prediction data in which a relationship among a rotational speed of a rotary electric machine, a torque information of the rotary electric machine, a temperature of the rotary electric machine at a reference time point, and a temperature of the rotary electric machine after lapse of the estimation calculation period from the reference time point,calculates an estimation value of temperature of the rotary electric machine after lapse of the estimation calculation period from the last time calculation timing, corresponding to the present rotational speed of the rotary electric machine, the present torque information of the rotary electric machine, and the estimation value of temperature of the rotary electric machine calculated at the last time calculation timing.2. The controller for rotary electric machine according to claim 1 ...

Control Device and Method for Brushless Motor

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

Method and apparatus for controlling operation of a permanent magnet rotary electric machine

A method, system, and apparatus for controlling and regulating operation of a permanent magnet rotary electric machine including a stator and a rotor includes determining a first reactive power term associated with the electric machine based upon voltage, and determining a second reactive power term associated with the electric machine based upon flux. A first motor temperature associated with the electric machine is determined based upon the first and second reactive power terms, and power output from the permanent magnet electric machine is controlled based upon the first motor temperature.

DETERMINATION OF THE ROTOR TEMPERATURE OF A PERMANENT MAGNET SYNCHRONOUS MACHINE

Methods and apparatuses for determining a rotor temperature of a permanent magnet synchronous machine (PSM) of an electrically driven vehicle are described. 1. A method for determining a rotor temperature of a permanent magnet synchronous machine in an electrically driven vehicle , comprising:in a driving state in which no torque is demanded of the permanent magnet synchronous machine, operating a power electronics system supplying the permanent magnet synchronous machine with energy in a current regulation mode; andregulating the power electronics system such that an alternating current on an AC side of the power electronics system is zero;while the alternative current on the AC side of the power electronics system is zero, measuring a direct voltage on a DC side of the power electronics system and an electrical angular velocity of the permanent magnet synchronous machine; andcalculating the rotor temperature based on the measured direct voltage and the measured electrical angular velocity.2. The method according to claim 1 , wherein an alternating voltage applied to the AC side of the power electronics unit is calculated from the measured direct voltage and a duty cycle of the power electronics unit.3. The method according to claim 2 , wherein the rotor temperature is calculated from the calculated alternating voltage applied to the AC side of the power electronics unit and the measured electrical angular velocity of the permanent magnet synchronous machine according to rotor temperature≈alternating voltage divided by the measured electrical angular velocity.4. The method according to claim 1 , wherein the driving state claim 1 , in which no torque is demanded of the permanent magnet synchronous machine claim 1 , is a coasting mode.5. An apparatus for determining a rotor temperature of a permanent magnet synchronous machine claim 1 , comprisinga power electronics unit that feeds the permanent magnet synchronous machine with alternating current;at least one current ...

INVERTER, ELECTRIC DRIVE, VEHICLE AND METHOD FOR CONTROLLING CONTROLLABLE SWITCHES OF AN INVERTER AND CORRESPONDING COMPUTER PROGRAM PRODUCT

The inverter (110) comprises input terminals (IT+, IT−), output terminals (OT), controllable switches (Q, Q′) connected to the input terminals (IT+, IT−) and to the output terminals (OT) and a control device (116) configured to control the controllable switches (Q, Q′) so as to convert a DC voltage at the input terminals (IT+, IT−) into an AC voltage at the output terminals (OT) intended to drive an asynchronous electric motor (108) to achieve a target torque (T*), selectively: in a first mode of operation in which the target torque (T*) is determined according to a torque determination method, and in response to a rotor temperature (Tr), in a second mode of operation in which losses in the rotor are decreased relative to the first mode of operation while the target torque (T*) remains determined according to the torque determination method of the first mode of operation. 1. An inverter comprising:input terminals;output terminals;controllable switches connected to the input terminals and to the output terminals;a control device configured to control the controllable switches so as to convert a DC voltage at the input terminals into an AC voltage at the output terminals configured to drive an asynchronous electric motor to achieve a target torque, selectively:in a first mode of operation in which the target torque is determined according to a torque determination method, andin response to a rotor temperature, in a second mode of operation in which losses in the rotor are decreased relative to the first mode of operation while the target torque remains determined according to the torque determination method of the first mode of operation.2. The inverter according to claim 1 , wherein claim 1 , in the second mode of operation claim 1 , the control device is configured to control the controllable switches to increase loses in a stator of the motor claim 1 , relative to the first mode of operation.3. The inverter according to claim 1 , wherein claim 1 , in the second ...

PERMANENT-MAGNET ELECTRIC MOTOR

A permanent-magnet electric motor includes: a rotor; and a rotational-position detection sensor configured to detect a rotational position of the rotor. The rotor includes: a rotating shaft; an annular ferrite magnet disposed on an outer circumferential surface of the rotating shaft; and a rare-earth magnet disposed on an outer circumferential surface of the ferrite magnet, and a length from a center of the ferrite magnet in an axial direction of the ferrite magnet to an end face of the ferrite magnet on a side of the rotational-position detection sensor in the axial direction of the ferrite magnet is longer than a length from a center of the rare-earth magnet in an axial direction of the rare-earth magnet to an end face of the rare-earth magnet on a side of the rotational-position detection sensor in the axial direction of the rare-earth magnet. 14-. (canceled)5. A permanent-magnet electric motor comprising:a rotor; anda rotational-position detection sensor to detect a rotational position of the rotor, whereinthe rotor includes:a rotating shaft;an annular ferrite magnet disposed on an outer circumferential surface of the rotating shaft; anda rare-earth magnet disposed on an outer circumferential surface of the ferrite magnet, anda length from a center of the ferrite magnet in an axial direction of the ferrite magnet to an end face of the ferrite magnet on a side of the rotational-position detection sensor in the axial direction of the ferrite magnet is longer than a length from a center of the rare-earth magnet in an axial direction of the rare-earth magnet to an end face of the rare-earth magnet on a side of the rotational-position detection sensor in the axial direction of the rare-earth magnet, andthe ferrite magnet is disposed between the rotating shaft and the rare-earth magnet, and only one end of the ferrite magnet extends toward the rotational-position detection sensor.6. The permanent-magnet electric motor according to claim 5 , further comprising a stator ...

Motor control device

A motor control device having a motor temperature sensor for detecting a magnet temperature of the motor, a magnet magnetic flux calculation section that calculates a magnet magnetic flux of the motor corresponding to the magnet temperature of the motor, a current combination candidate calculating section that calculates a d-q axis current combination candidate that minimizes the input current of the inverter within a voltage limit ellipse determined by a value that can be output by a voltage of a power supply of the motor, and a d-q axis current search section that searches the d-q axis current that minimizes the input current of the inverter within the range of the combination candidate of the d-q axis currents when the d-q axis current of the motor moves on a voltage limiting ellipse by automatic weakening flux control.

Rotor for an Electric Machine and Electric Machine Having a Rotor

A rotor () for an electric machine () has a rotor body including multiple poles. The rotor () further has at least one sensor element () for detecting at least one condition variable of the rotor (), and a signal processing unit () connected to the at least one sensor element (). The signal processing unit () is configured to generate measured data from the condition variable of the rotor () and to transmit the measured data to a control device (). Additionally, the rotor () has at least one induction coil (), where each of the at least one induction coil () includes at least one electrical conductor (). The at least one induction coil () is arranged at the rotor () and is configured to generate electrical energy from a magnetic field that is temporally changing during operation of the electric machine (). 115-: (canceled)1612. A rotor () for an electric machine () , comprising:a rotor body including multiple poles;{'b': 3', '1, 'at least one sensor element () for detecting at least one condition variable of the rotor ();'}{'b': 4', '3', '4', '1', '5, 'a signal processing unit () connected to the at least one sensor element (), the signal processing unit () being configured to generate measured data from the condition variable of the rotor () and to transmit the measured data to a control device (); and'}{'b': 7', '7', '8', '7', '1', '2, 'at least one induction coil (), each of the at least one induction coil () includes at least one electrical conductor (), the at least one induction coil () being arranged at the rotor () and being configured to generate electrical energy from a magnetic field that is temporally changing during operation of the electric machine ().'}171743. The rotor () of claim 16 , wherein the at least one induction coil () supplies electrical energy to one or both of the signal processing unit () and the at least one sensor element ().18187911921. The rotor () of claim 16 , wherein the at least one electrical conductor () of the at least one ...

Rotor for an Electric Machine and Electric Machine Having a Rotor

A rotor (1) for an electric machine (2) includes a rotor body with multiple poles. Multiple flux barriers (6.1, 6.2, 6.3, 6.4) are formed in the interior of the rotor body. The rotor (1) further includes at least one sensor element (3) configured for detecting at least one condition variable of the rotor (1), a signal processing unit (4) connected to the at least one sensor element (3) and configured for generating measured data from the detected condition variable of the rotor (1) and transmitting the measured data to a control device (5), and at least one induction coil (7) that includes at least one electrical conductor (8), is arranged in at least one flux barrier (6.1) of the rotor (1), and is configured for generating electrical energy from a leakage magnetic field in this flux barrier (6.1).

Method and system for controlling wound rotor synchronous motor

The present disclosure provides a system for controlling a wound rotor synchronous motor including: a current/voltage determiner configured to determine optimum rotor current using a map from real-time motor operating information and to determine and output a rotor voltage according to the determined optimum rotor current, and a temperature estimator configured to calculate and output a rotor coil temperature from the rotor voltage and the optimum rotor current output from the current/voltage determiner using a rotor coil temperature estimation equation set from a correlation equation between the rotor voltage and the rotor coil temperature for each rotor current.

Vehicle and method of controlling the same

A vehicle and method of controlling the same are provided in which the performance of an electric motor is prevented from being degraded by efficiently and more accurately calculating the temperature of a permanent magnet within the electric motor to adjust the amount of power supplied to the electric motor. The vehicle includes an electric motor having a stator, a rotor, and a permanent magnet and a sensor that measures the temperature of the electric motor. An inverter drives the electric motor and a controller generates a predetermined heat quantity by supplying power to the electric motor to calculate the temperature of the permanent magnet based on the temperature of the electric motor at a predetermined point measured using the sensor. When the temperature of the permanent magnet exceeds a predetermined temperature, the controller reduces the supply of the power.

IRRIGATION MOTOR AND GEARBOX TEMPERATURE MONITORING AND CONTROL SYSTEM

A control system for monitoring a motor and wheel drive gearbox of an irrigation system drive train. The control system includes a motor sensor for sensing an operating state of the motor and a gearbox sensor for sensing an operating state of the wheel drive gearbox. If the motor operating state exceeds a motor operating state threshold or changes too quickly, or if the wheel drive gearbox operating state exceeds a wheel drive gearbox operating state threshold or changes too quickly, the control system operates the drive train at a reduced capacity or in a modified mode such that the operating state is not exceeded or does not change too quickly. 1. A control system for monitoring a motor and wheel drive gearbox of an irrigation system drive train , the control system comprising:a motor sensor for sensing an operating state of the motor;a gearbox sensor for sensing an operating state of the wheel drive gearbox; and receive data from the motor sensor representing the motor operating state;', 'receive data from the gearbox sensor representing the gearbox operating state;', 'determine whether the motor operating state exceeds a motor operating state threshold or indicates a rate of change above a motor operating state rate of change threshold;', 'if the motor operating state exceeds the motor operating state threshold or indicates a rate of change above the motor operating state rate of change threshold, generate and transmit a command and/or enact an operating change so that the drive train continues to operate such that the motor operating state does not exceed the motor operating state threshold or indicates that the motor operating state rate of change does not exceed the motor operating state rate of change threshold;', 'determine whether the gearbox operating state exceeds a gearbox operating state threshold or indicates a rate of change above a gearbox operating state rate of change threshold; and', 'if the gearbox operating state exceeds the gearbox operating ...

MOTOR MODULE, MOTOR CONTROLLER, TEMPERATURE INFERRING DEVICE, AND TEMPERATURE INFERENCE METHOD

A method to infer a temperature of windings in a stator of an electric motor includes repeating processing to infer electric resistance and temperature of the windings. The processing includes calculating a tentative electric resistance of the windings according to an equation that defines a relationship between electric resistance and a group of parameters; calculating a resistance difference between the tentative electric resistance and electric resistance inferred last time; detecting a change in a load state according to the parameters; inferring the electric resistance by adding the integrated value of calculated resistance differences to the initial value of the inferred electric resistance; and inferring the temperature of the windings according to the inferred electric resistance. In the inferring the electric resistance, a resistance difference calculated when a change in the load state is detected is excluded from the integrated value. 1. A motor module comprising:an electric motor including a rotor and a stator, the stator including a plurality of windings;a current sensor to monitor current, each of which flows in one of the plurality of windings;a rotor angle inferring circuit to generate a rotor position signal that indicates an angular position of the rotor; anda motor control circuit connected to the electric motor to control a rotation of the rotor by applying a voltage to the plurality of windings; whereinthe motor control circuit includes a temperature inferring circuit that repeats processing to infer an electric resistance and a temperature of the plurality of windings;the processing repeated by the temperature inferring circuit includes:calculating a tentative electric resistance of the plurality of windings according to an equation that defines a relationship between an electric resistance and a group of parameters that include a voltage, a current, and a rotor speed, the parameters being used to control the rotation of the rotor;calculating a ...

MAGNET DEGRADATION AND DAMAGE CONTROLS AND DIAGNOSTICS FOR PERMANENT MAGNET MOTORS

Techniques for motor magnet degradation controls and diagnostics are disclosed. An exemplary technique determines q-axis current, d-axis current, q-axis voltage, and/or d-axis voltage of a permanent magnet motor based upon sensed current and voltage information of the motor. This information is utilized to determine flux information. The flux information is utilized in evaluating collective state conditions of a plurality of motor magnets and evaluating localized state conditions of a subset of the plurality of motor magnets. The evaluations can be used to identify degradation or damage to one or more of the magnets which may occur as a result of elevated temperature conditions, physical degradation, or chemical degradation. 1. A method comprising:operating a system comprising a permanent magnet motor and a variable frequency drive, the permanent magnet motor comprising a stator including a plurality of windings electrically coupled to terminals and a rotor including a plurality of permanent magnets, the variable frequency drive including a plurality of outputs electrically coupled with the terminals;determining magnetic flux information based upon information indicative of a motor current, information indicative of a terminal voltage, information indicative of a motor inductance, and information indicative of a motor resistance;identifying a collective flux error condition associated with the plurality of permanent magnets collectively based upon the flux information; andidentifying a localized flux error condition based upon the flux information associated with a subset of the plurality of permanent magnets including at least one of the magnets.2. A method according to further comprising determining d-axis current information claim 1 , q-axis current information claim 1 , and q-axis voltage information based upon sensed motor operation information claim 1 , and wherein the act of determining the magnetic flux information is based upon the d-axis current ...

ROTATING ELECTRIC MACHINE FOR A MOTOR VEHICLE

A rotating electrical machine for a motor vehicle comprising a rotor () supplied with an excitation current (ie), a stator () comprising a polyphase winding and coupled to the rotor (), a thermal protection module () suitable for evaluating at least one temperature (T T T) in the machine and for comparing the temperature with an associated thermal protection threshold (Th), a control device () supplying the excitation current (ie) depending on an operation mode command (RQ) and the temperature comparison, so as to operate the rotating electrical machine () according to a mode of operation chosen from a nominal generator mode in which the machine is configured to deliver a first maximum power or at least one extended generator mode in which the machine is configured to deliver a second maximum power greater than said first maximum power. 111. Rotary electrical machine () for a motor vehicle , wherein said rotary electrical machine () comprises:{'b': '2', 'a rotor () which is supplied by an excitation current (ie);'}{'b': 3', '2, 'a stator () which comprises a polyphase winding, and is coupled to said rotor ();'}{'b': 4', '1, 'a thermal protection module () which is designed to evaluate at least one temperature (T) in the rotary electrical machine (), and to compare the said at least one temperature (T) with an associated thermal protection threshold (Th);'}{'b': 5', '2', '6', '1, 'a device () for control of the rotor () which supplies the excitation current (ie) according to an operating mode command (RQ) received from a motor control unit () of said motor vehicle, and according to said temperature comparison, such as to make the rotary electrical machine () operate according to an operating mode (M) from amongst{'b': '1', 'a nominal generator mode (M), in which the machine is configured to provide a first maximum power; or'}{'b': 2', '2, 'at least one extended generator mode (M, M′), in which the machine is configured to provide a second maximum power greater than ...

MAGNET TEMPERATURE ESTIMATING DEVICE FOR MOTOR AND HYBRID VEHICLE PROVIDED WITH THE SAME

A magnet temperature estimating device for a motor including a rotor having magnets and configured to output a rotational motive force, and a stator having a plurality of coils opposing the rotor with a gap therebetween, is provided. The device includes a sensor configured to detect an induced voltage induced by rotation of the rotor, and a controller configured to control the motor by supplying power to the plurality of coils in response to an input of a detection signal from the sensor. Gaps adjacent to each magnet in a rotation direction of the rotor are formed in the rotor. The controller estimates a temperature of the magnet based on the induced voltage detected when the magnet opposes any one of the plurality of coils, according to the rotation of the rotor. 1. A magnet temperature estimating device for a motor provided with a rotor having magnets and configured to output a rotational motive force , and a stator having a plurality of coils opposing the rotor with a gap therebetween , the device comprising:a sensor configured to detect an induced voltage induced by rotation of the rotor; anda controller configured to control the motor by supplying power to the plurality of coils in response to an input of a detection signal from the sensor,wherein apertures adjacent to each magnet in a rotation direction of the rotor are formed in the rotor, andwherein the controller estimates a temperature of one of the magnets based on the induced voltage detected when the one magnet opposes any one of the plurality of coils, according to the rotation of the rotor.2. The motor magnet temperature estimating device of claim 1 , wherein the controller stores in advance a timing at which a center part of the one magnet in the rotation direction crosses a center axis line of each of the plurality of coils as the rotor rotates claim 1 , and acquires the induced voltage at the stored timing.3. The motor magnet temperature estimating device of claim 2 , wherein the controller ...

Magnet temperature estimating device for motor and hybrid vehicle provided with the same

A magnet temperature estimating device for a motor provided with a rotor having magnets and configured to output a rotational motive force, and a stator having a plurality of coils opposing the rotor with an aperture therebetween, is provided. The device includes a sensor configured to detect an induced voltage induced by rotation of the rotor, and a controller configured to control the motor by supplying power to the plurality of coils in response to an input of a detection signal from the sensor. The controller estimates a temperature of one of the magnets based on an amplitude of a frequency spectrum corresponding to a given frequency, among frequency components constituting the induced voltage.

SENSORLESS THERMAL PROTECTION FOR POWER TOOLS

A power tool is provided, including a housing; a brushless DC (BLDC) motor arranged within the housing, the motor including a stator and a rotor rotatably disposed within the stator; a power module electrically disposed between the motor and a power supply, the power module including power switches; an actuator engageable by a user; and a control module configured to control a switching operation of the power switches to begin supply power to the motor when the actuator is engaged. The control module monitors engagement and disengagement events of the actuator, and ignores a subsequent engagement of the actuator if at least one of number of actuator engagement events and/or number of actuator disengagement events exceeds a predetermined threshold value within a predetermined time. 1. A power tool comprising:a housing;a brushless DC (BLDC) motor arranged within the housing, the motor including a stator and a rotor rotatably disposed within the stator;a power module electrically disposed between the motor and a power supply, the power module comprising a plurality of power switches;an actuator engageable by a user; anda control module configured to control a switching operation of the plurality of power switches to begin supply power to the motor when the actuator is engaged,wherein the control module is configured to monitor engagement and disengagement events of the actuator, and ignore a subsequent engagement of the actuator if at least one of number of actuator engagement events and/or number of actuator disengagement events exceeds a predetermined threshold value within a predetermined time.2. The power tool of claim 1 , wherein the control module is configured to electronically brake the motor when the actuator is disengaged.3. The power tool of claim 1 , wherein the power module comprises a plurality of high-side and low-side switches configured as a three-phase inverter circuit.4. The power tool of claim 1 , wherein the power tool is a miter saw configured to ...

SYSTEMS AND METHODS FOR ACQUIRING MEASUREMENTS OF ROTOR TEMPERATURE OF ELECTRIC MACHINES

A system may include a motor that has a rotor and a stator. The system may include one or more sensors that measure a voltage signal of a winding of the stator. The system may include a processor that executes computer-executable instructions which, when executed, cause the processor to receive, from the one or more sensors, the voltage signal that includes an induced voltage signal associated with the winding of the stator, to determine a time constant associated with the induced voltage signal based on a decay pattern of the induced voltage signal, to determine a temperature of a rotor based on the time constant, and to adjust one or more operations of the motor based on the temperature. 1. A system , comprising:a motor comprising a rotor and a stator;one or more sensors configured to measure a voltage signal of a winding of the stator; and receive, via the one or more sensors, the voltage signal, wherein the voltage signal comprises an induced voltage signal associated with the winding of the stator;', 'determine a time constant associated with the induced voltage signal based on a decay pattern of the induced voltage signal;', 'determine a temperature of a rotor based at least in part on the time constant; and', 'adjust one or more operations of the motor based on the temperature., 'a processor configured to execute computer-executable instructions which, when executed, cause the processor to2. The system of claim 1 , wherein the processor is configured to adjust the one or more operations of the motor by adjusting one or more properties of an electrical supply configured to couple to the stator.3. The system of claim 1 , wherein the processor is configured to determine an additional temperature of a component thermally coupled to the rotor based on the temperature and a thermal model.5. The system of claim 1 , wherein the processor is configured to determine the time constant based on a regression calculation configured to determine a slope of the decay pattern ...

Method for Controlling Dissipated Heat in an Electrical Power Plant of a Motor Vehicle, Electrical Power Plant for a Motor Vehicle, and Motor Vehicle

An electric traction machine, a motor vehicle, and a method for controlling dissipated heat in the electrical power plant of the motor vehicle are described herein. The power plant is supplied with a current, where, in order to provide a predetermined amount of dissipated heat, a ratio between a field-forming and a torque-forming current deviating from an optimum ratio for a respective operating point of the power plant is prescribed. The predetermined dissipated heat is provided by a power plant embodied as a magnet-less three-phase alternator while a rotor current flowing through a rotor of the three-phase alternator is adjusted, the field-forming and the torque-forming currents being prescribed such that acoustic interference signals of the three-phase alternator are minimized by the ratio, and the rotor current is adjusted such that the predetermined dissipated heat is provided by a combination of the rotor current and the ratio minimizing the interference signals.

Synchronous machine controller

A synchronous machine controller includes a position detecting unit that detects a position of a rotor, a current detecting unit that detects an armature current, a current command generating unit that generates first and second current commands, a voltage command generating unit that generates a voltage command on the basis of the current commands, the position of the rotor, and the armature current, a power converting unit that outputs a voltage to the synchronous machine on the basis of the voltage command, a magnetic flux estimating unit that estimates an armature interlinkage flux on the basis of a rotational velocity calculated from a variation of the position of the rotor, the voltage command, and the armature current, and a magnet state estimating unit that estimates a magnetic flux or a temperature of the permanent magnet from the position of the rotor, the armature current, and the armature interlinkage flux.

MOTOR DRIVE CONTROL DEVICE

Provided is a motor drive control device which is capable of properly driving and controlling a permanent magnet synchronous motor capable of independently controlling each phase in accordance with the temperature of the permanent magnet. 1. A motor drive control device of a permanent magnet synchronous motor in which each phase is independently controlled , the motor drive control device comprising:a smoothing capacitor interposed between a battery configured to supply electric power to the permanent magnet synchronous motor and the permanent magnet synchronous motor to smoothen the current;an inverter interposed between the smoothing capacitor and the permanent magnet synchronous motor to convert a DC bus current flowing on the smoothing capacitor side into a multiphase motor current and supply the multiphase motor current to the permanent magnet synchronous motor;a current detection unit which detects one of the motor current and the DC bus current;a 0-axis current calculation unit which calculates and outputs a 0-axis current on the basis of the current detected by the current detection unit;a comparison determination unit which compares and determines a reference 0-axis current value which is a 0-axis current value when the temperature of a permanent magnet provided in the permanent magnet synchronous motor is a reference temperature with the calculated 0-axis current; anda drive control unit which drives and controls the inverter on the basis of the result of the comparison determination of the comparison determination unit.2. The motor drive control device according to claim 1 , further comprising:a calculation unit which calculates a magnitude of the 0-axis current with respect to the reference 0-axis current value,wherein the drive control unit outputs an inverter drive signal based on a drive condition in which a predetermined torque is output when the temperature of the permanent magnet is a reference temperature in a case where the 0-axis current ...

Rotor resistance based motor thermal protection

Motor overload protection device is equipped with a thermal monitor that can determine expected rotor temperature rise from rotor resistance estimates. The thermal monitor determines expected rotor temperature rise by using a correlation between rotor temperature rise computed from rotor resistance estimates, and motor thermal state estimates. The correlation can be derived by fitting a line to a plurality of points, with each point defined by an ordered pair composed of a rotor temperature rise estimate and a corresponding motor thermal state estimate, and determining a slope of the line. This rotor temperature slope can then be used by the thermal monitor to determine a rotor temperature rise given a rotor resistance estimate and a corresponding motor thermal state estimate. If the rotor temperature rise exceeds an expected rotor temperature rise by more than a predefined threshold, the thermal monitor issues an alarm and/or takes corrective actions in some embodiments.

Integrated Motor Operation Data Collection and Operation Protection Device

This invention discloses an Integrated Motor Operation Data Collection and Operation Protection Device. The device is integrated inside of a motor. Its temperature sensors are distributed on windings, slots, lamination, and bearings. The voltage sensing is through the terminal binding posts. The current sensors are clamped on the connections between the terminal binding pasts and windings. The vibration sensor and the on board temperature sensor are integrated on the monitor board. The MCU runs the firmware which performs data collection, data analysis, communication, alarm report and data storage.

SYNCHRONOUS MACHINE CONTROL DEVICE AND PERMANENT MAGNET TEMPERATURE ESTIMATION METHOD FOR SYNCHRONOUS MACHINE

Provided are: a synchronous machine having permanent magnets as a field system; a stress estimator that estimates stress acting on the permanent magnets; and a first magnet temperature corrector that calculates an amount of demagnetization due to stress of armature interlinkage magnetic flux on the basis of the estimated stress, estimates an amount of demagnetization due to stress of the armature interlinkage magnetic flux on the basis of the rotor position of the synchronous machine, a current command and a voltage command, and the amount of demagnetization due to stress of the armature interlinkage magnetic flux; and outputs a permanent magnet temperature estimated value after correction, having factored therein the amount of demagnetization due to stress of the armature interlinkage magnetic flux from the estimated armature interlinkage magnetic flux. 1. A synchronous machine control device , comprising:a synchronous machine having permanent magnets as a field system;a stress estimator that estimates stress acting on the permanent magnets; anda first magnet temperature estimator that, on the basis of the stress estimated by the stress estimator, calculates an amount of demagnetization due to stress of armature interlinkage magnetic flux, estimates the armature interlinkage magnetic flux on the basis of a rotor position of the synchronous machine, a current command and a voltage command used in driving control of the synchronous machine, and the amount of demagnetization due to stress of the armature interlinkage magnetic flux, and outputs a permanent magnet temperature estimated value after correction, having factored therein the amount of demagnetization due to stress of the armature interlinkage magnetic flux from the estimated armature interlinkage magnetic flux.2. The synchronous machine control device of claim 1 ,wherein the first magnet temperature estimator has:a second magnet temperature estimator that estimates the armature interlinkage magnetic flux on ...

VACUUM PUMP AND CONTROL METHOD THEREFOR

A vacuum pump according to an embodiment of the present invention includes a pump main body, a first temperature sensor, a motor, and a control unit. The pump main body includes a rotary shaft and a metal casing portion. The first temperature sensor is attached to the casing portion and detects a temperature of the casing portion. The motor includes a rotor core including a permanent magnet and attached to the rotary shaft, a stator core including a plurality of coils, and a can that houses the rotor core. The control unit includes a driving circuit and a correcting circuit. The driving circuit supplies the plurality of coils with a driving signal for rotating the motor on a basis of a pre-set induced voltage constant. The correcting circuit corrects the induced voltage constant on a basis of an output of the first temperature sensor. 1. A vacuum pump , comprising: 'a rotary shaft, and', 'a pump main body including'}a metal casing portion,a first temperature sensor that is attached to the casing portion and detects a temperature of the casing portion; a rotor core including a permanent magnet and attached to the rotary shaft,', 'a stator core including a plurality of coils, and', 'a can that houses the rotor core; and, 'a motor including'} a driving circuit that supplies the plurality of coils with a driving signal for rotating the motor on a basis of a pre-set induced voltage constant, and', 'a correcting circuit that corrects the induced voltage constant on a basis of an output of the first temperature sensor., 'a control unit including'}2. The vacuum pump according to claim 1 , whereinthe correcting circuit corrects the induced voltage constant such that an induced voltage of the motor becomes lower as the temperature of the casing portion becomes higher if the temperature of the casing portion is within a predetermined temperature range.3. The vacuum pump according to claim 2 , whereinthe correcting circuit corrects the induced voltage constant in accordance ...

APPARATUS FOR CONTROLLING MOTOR

An apparatus for controlling a motor having a housing in which a stator and a rotor are disposed. The motor is cooled by a cooling oil in the housing. The apparatus includes a control unit configured to control the motor. The control unit has a temperature increase mode for heating the cooling oil with use of heat generated by a resistance of a coil provided in the stator. 1. An apparatus for controlling a motor having a housing in which a stator and a rotor are disposed , the motor being cooled by a cooling oil in the housing , the apparatus comprising:a control unit configured to control the motor, the control unit having a temperature increase mode for heating the cooling oil with use of heat generated by a resistance of a coil provided in the stator.2. The apparatus according to claim 1 , whereinthe temperature increase mode is a mode for controlling the motor with a current amplitude and a current phase that are different from those of a normal mode in which the motor is controlled with a current amplitude and a current phase with which a required torque of the motor is efficiently output.3. The apparatus according to claim 2 , further comprising:an inverter for driving the motor; anda battery for supplying electric power to the motor,wherein, in the temperature increase mode, the control unit has a function to configure the current phase of the motor to be retarded further than in the normal mode.4. The apparatus according to claim 3 , whereinthe control unit is configured to, in the temperature increase mode, switch between a retard temperature increase mode in which the current phase of the motor is configured to be retarded further than in the normal mode and an advance temperature increase mode in which the current phase of the motor is configured to be advanced further than in the normal mode in accordance with at least one of the temperature of the Inverter and the current amplitude of the motor.5. The apparatus according to claim 2 , whereinthe control ...

METHOD FOR TORQUE CONTROL SYSTEMS AND METHODS BASED ON ROTOR TEMPERATURE

An electric motor control system of a vehicle includes a current command module configured to, based on a motor torque request for an electric motor of the vehicle, generate a first d-axis current command for the electric motor and a first q-axis current command for the electric motor. An adjustment module is configured to, based on a speed of a rotor of the electric motor and the motor torque request, selectively determine at least one of a d-axis current adjustment and a q-axis current adjustment based on a temperature of the rotor of the electric motor. An adjusting module is configured to produce a second d-axis current command for the electric motor by adjusting the first d-axis current command based on the d-axis current adjustment and to produce a second q-axis current command for the electric motor by adjusting the first q-axis current command based on the q-axis current adjustment. 1. An electric motor control system of a vehicle , comprising:a current command module configured to, based on a motor torque request for an electric motor of the vehicle, generate a first d-axis current command for the electric motor and a first q-axis current command for the electric motor;an adjustment module configured to, based on a speed of a rotor of the electric motor and the motor torque request, selectively determine at least one of a d-axis current adjustment and a q-axis current adjustment based on a temperature of the rotor of the electric motor;an adjusting module configured to produce a second d-axis current command for the electric motor by adjusting the first d-axis current command based on the d-axis current adjustment and to produce a second q-axis current command for the electric motor by adjusting the first q-axis current command based on the q-axis current adjustment; anda switching control module configured to, based on the second d-axis current command and the second q-axis current command, control switching of an inverter module and apply power to stator ...

POWER CONVERSION DEVICE CONTROL SYSTEM, MOTOR SYSTEM AND COMPOSITE SYSTEM

A power conversion device control system includes a power conversion device configured to supply electric power to a rotary electric machine, and a control device configured to control the power conversion device, wherein the control device controls the power conversion device through synchronous control in which a carrier frequency of the power conversion device is proportional to a rotational speed of the rotary electric machine when a temperature of a permanent magnet provided in the rotary electric machine is higher than a predetermined threshold value, and controls the power conversion device through non-synchronous control in which a carrier frequency of the power conversion device is not proportional to a rotational speed of the rotary electric machine when a temperature of the permanent magnet is the predetermined threshold value or less. 1. A power conversion device control system comprising:a power conversion device configured to supply electric power to a rotary electric machine; anda control device configured to control the power conversion device,wherein the control devicecontrols the power conversion device through synchronous control in which a carrier frequency of the power conversion device is proportional to a rotational speed of the rotary electric machine when a temperature of a permanent magnet provided in the rotary electric machine is higher than a predetermined threshold value, andcontrols the power conversion device through non-synchronous control in which a carrier frequency of the power conversion device is not proportional to a rotational speed of the rotary electric machine when a temperature of the permanent magnet is the predetermined threshold value or less.2. A motor system comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the power conversion device control system according to , a traveling/driving motor serving as the rotary electric machine, and a generating motor,'}wherein the control device controls the power ...

METHOD AND DEVICE FOR OPERATING AN ELECTRIC MACHINE FOR OUTPUTTING A PREDEFINED TORQUE AND A PREDEFINED ROTATIONAL SPEED

The invention relates to a method and device for operating an electric machine () for outputting a predefined torque and a predefined rotational speed, comprising the following steps: providing () a first and a second operating mode for the operation of the electric machine (); detecting () a temperature of the electric machine (); and operating the electric machine () in the first operating mode () if the detected temperature falls below a threshold value, and operating the electric machine () in the second operating mode () if the detected temperature corresponds with the threshold value or exceeds same. During the operation of the electric machine () in the second operating mode (), with the resulting output of the predefined torque and the predefined rotational speed, the magnetic stator flux of the electric machine () is reduced compared with the magnetic stator flux of the electric machine () during the operation of the electric machine () in the first operating mode (), with the resulting output of the predefined torque and the predefined rotational speed. 140010. A method () for operating an electric machine () for outputting a predetermined torque and a predetermined rotational speed , the method comprising:{'b': 420', '10, 'providing () a first and a second operating mode for the operation of the electric machine ();'}{'b': 430', '10, 'detecting () a temperature of the electric machine ();'}{'b': 10', '440', '10', '450, 'operating the electric machine () in the first operating mode () when the detected temperature is below a threshold value and operating the electric machine () in the second operating mode () when the detected temperature equal or exceeds the threshold value,'}wherein,{'b': 10', '450', '10', '10', '10', '440, 'when the electric machine () is operated in the second operating mode (), the magnetic stator flux of the electric machine () is reduced in comparison to the magnetic stator flux of the electric machine () when the electric machine ...

CONTROL DEVICE AND CONTROL METHOD

To estimate a magnet magnetic flux or a magnet temperature with higher accuracy during a three-phase short circuit operation, than in a case only a d-axis current is used. A control device includes a phase short circuit unit for short-circuiting three-phase terminals of a permanent-magnet-type synchronous machine having a permanent magnet. During three-phase short circuit operation in which the three-phase terminals are short-circuited by the phase short circuit unit and the permanent-magnet-type synchronous machine is operated, the control device estimates a magnet state of the permanent magnet on the basis of a d-axis current, a q-axis current and a magnetic characteristic. 19-. (canceled)10. A control device comprising a phase short circuit unit for short-circuiting three-phase terminals of a permanent-magnet-type synchronous machine having a permanent magnet , whereinduring three-phase short circuit operation in which the three-phase terminals are short-circuited by the phase short circuit unit and the permanent-magnet-type synchronous machine is operated, a magnet state of the permanent magnet is estimated on the basis of: a d-axis current flowing through the permanent-magnet-type synchronous machine during the three-phase short circuit operation; a q-axis current flowing through the permanent-magnet-type synchronous machine during the three-phase short circuit operation; and a magnetic characteristic of the permanent-magnet-type synchronous machine.11. The control device according to claim 10 , whereinthe magnetic characteristic is a preset d-axis inductance and a preset q-axis inductance, andduring the three-phase short circuit operation, a magnet magnetic flux estimated value of a magnet magnetic flux is calculated on the basis of: the d-axis current flowing through the permanent-magnet-type synchronous machine during the three-phase short circuit operation; the q-axis current flowing through the permanent-magnet-type synchronous machine during the three- ...

INVERTER CONTROL DEVICE AND AIR CONDITIONER

An inverter control device that controls an inverter unit that converts a DC voltage from a converter unit to an AC voltage and supplies the AC voltage to the DC motor includes a storage unit that stores therein information regarding a synchronization-loss limit; a synchronization-loss limit-current calculation unit that calculates the limitation value on the synchronization-loss limit current on the basis of the magnet temperature of the DC motor, the bus voltage to be applied to the inverter unit, and the information regarding a synchronization-loss limit; and a control unit that compares the primary current to be input to the converter unit with the limitation value and that, when the primary current exceeds the limitation value, outputs an adjustment command to adjust the operating frequency of the DC motor such that the primary current becomes equal to or less than the limitation value. 1. An inverter control device that controls an inverter unit that converts a DC voltage from a converter unit to an AC voltage and supplies the AC voltage to a DC motor , where the converter unit converts a voltage from a commercial AC power supply to a DC voltage , the inverter control device comprising:a magnet-temperature detection unit that detects a magnet temperature of the DC motor;a bus-voltage detection unit that detects, as a bus voltage, a DC voltage to be applied to the inverter unit;a primary-current detection unit that detects a primary current to be input to the converter unit; anda control unit that controls the inverter unit, wherein a storage unit that stores therein information regarding a synchronization-loss limit,', 'a synchronization-loss limit-current calculation unit that calculates a limitation value on a synchronization-loss limit current on a basis of the magnet temperature, the bus voltage, and the information regarding the synchronization-loss limit,', 'a primary-current limitation control unit that compares the primary current with the limitation ...

EFFICIENT DATA PROPAGATION IN A COMPUTER NETWORK

Provided is a method for the computer-assisted operation of an electric motor which is exposed to a thermal load as a result of the rotational motion of its rotor during operation. In this method, measured data is received during the operation of the electric motor. One or more temperature values are derived from the measured data. A number of temperature characteristics curves are then forecast with differing restart times for defining a cooling period for reducing the thermal load on the electric motor, wherein the approximated temperature value, which results from the approximated temperature value is used as the specific starting value for a restart in the temperature characteristics curve to be forecast. 1. A method for the computer-assisted operation of an electric motor which is subjected , during an operation of the electric motor , to a thermal loading by a rotational motion of a rotor of the electric motor , the method comprising:receiving measurement data measured during the operation of the electric motor, wherein the measurement data are electrical and/or kinetic physical variables of the electric motor;determining at least one temperature value, approximated to a virtual real value, by means of a mathematical module, derived from a predefineable motor geometry, for physical variables of an overall state of the motor, and from the received measurement data as input data;predicting a number of temperature profiles with different restart times, wherein the temperature profiles are each dependent on the overall state of the electric motor and/or on a configuration of the electric motor, in order to define a cooling time period for reducing the thermal loading on the electric motor, wherein the approximated temperature value, which results from the at least one virtual real value, is input as a respective starting value for a restart into the temperature profile which is to be predicted;displaying a temperature profile which lies in the past, together with ...

SHAFT-MOUNTED MONITOR FOR MONITORING ROTATING MACHINERY

Disclosed herein is a shaft-mounted monitor for monitoring conditions of a rotating shaft using a calculated rotational component of the rotating shaft. The monitor may include a sensor such as an accelerometer, thermal sensor, strain gauge, or the like. In various embodiments, a variety of parameters relating to the rotating shaft may be monitored, such as a temperature, rotational speed, angular position, torque, power, frequency, or the like. The monitor may include a wireless transmitter to transmit the monitored condition of the rotating shaft to an intelligent electronic device or a monitoring system. 1. A system configured to monitor a rotating shaft , comprising: a first sensor configured to output a first signal representative of a rotational component of the rotating shaft;', 'a processor in communication with the first sensor and configured to generate a representation of the first signal;', 'a wireless transmitter in communication with the processor and configured to transmit a digitized representation of the first signal to the wireless access point; and', 'a power supply in electrical communication with the sensor, the wireless transmitter, and the processor, and configured to supply electrical power to the sensor, processor, and the wireless transmitter;, 'a shaft-mounted monitor configured to be coupled to the rotating shaft, comprising a wireless receiver in communication with the wireless transmitter and configured to receive the digitized representation;', 'a monitored equipment interface configured to receive a plurality of electrical parameters representative of electrical power used to drive the rotating shaft; and', determine a rotational parameter of the rotating shaft based on the first signal;', 'control at least one electrical parameter of electrical energy used to drive the rotating shaft based on the rotational parameter., 'a processor in communication with the wireless receiver and the monitored equipment interface configured to], 'an ...

ROTOR TEMPERATURE MONITORING METHOD AND SYSTEM FOR PERMANENT MAGNET SYNCHRONOUS MOTOR

A rotor temperature monitoring method and system for a permanent magnet synchronous motor are provided. According to the method and system, an a-phase line current and a b-phase line current of a stator of a permanent magnet synchronous motor are obtained as a first line current and a second line current; further, a line voltage between the a-phase and the b-phase of the stator is obtained and a rotating speed of the rotor of the permanent magnet synchronous motor is obtained; and then, the first line current, the second line current, the line voltage, the rotating speed of the rotor, an inductance parameter of the permanent magnet synchronous motor and a temperature characteristic equation of a permanent magnet of the rotor are substituted into a preset rotor permanent magnet temperature expression to calculate and obtain the temperature of the rotor. 1. A method for monitoring a temperature of a rotor of a permanent magnet synchronous motor , comprising:acquiring an a-phase line current of a stator of the permanent magnet synchronous motor as a first line current;acquiring a b-phase line current of the stator as a second line current;acquiring a line voltage between the a-phase and the b-phase of the stator;acquiring a rotating speed of the rotor of the permanent magnet synchronous motor;substituting the first line current, the second line current, the line voltage, the rotating speed, an inductance parameter of the permanent magnet synchronous motor and a temperature characteristic equation of a permanent magnet of the rotor into a preset rotor temperature expression, to calculate the temperature of the rotor.2. The method for monitoring a temperature of a rotor of a permanent magnet synchronous motor according to claim 1 , wherein the temperature characteristic equation is acquired by steps of:measuring and recording a current ambient temperature as a first rotor temperature under a condition that the permanent magnet synchronous motor is in a complete cold ...

ACTUATOR CONTROLLER AND ACTUATOR CONTROL METHOD

The controller for an actuator that is driven by a brushless motor estimates the temperature of the magnet in the brushless motor on the basis of an electric current value and a rotation speed thereof which are obtained by supplying power to rotate the brushless motor in a reverse direction, and limits current flowing through the brushless motor during forward rotation so as to prevent the magnet temperature from rising beyond an allowable maximum temperature. Limiting the current flowing through the brushless motor on the basis of the estimated magnet temperature makes it possible to drive the brushless motor while preventing the magnet temperature from rising beyond the allowable maximum temperature without providing the brushless motor with any temperature sensor for detecting the magnet temperature therein. 116.-. (canceled)17. A controller for an actuator that is driven by a brushless motor for driving an electric oil pump , wherein , according to a temperature of a magnet in the brushless motor estimated on the basis of a saturation rotation speed and a phase current value during saturation rotation of the brushless motor which are obtained by supplying power thereto while the electric oil pump is caused to run idle with oil drained out of an oil pipe by rotating the brushless motor in a direction reversal of a rotational direction thereof for driving the actuator , the actuator controller limits current flowing through the brushless motor while the brushless motor is driving the actuator.18. The actuator controller according to claim 17 , wherein the actuator controller limits the current flowing through the brushless motor first by calculating the temperature of the magnet in the brushless motor on the basis of temperature-torque characteristics thereof claim 17 , and then by limiting a control variable in accordance with the calculated temperature and demagnetization characteristics of the magnet.19. The actuator controller according to claim 18 , wherein ...

PERMANENT-MAGNET-TYPE ROTATING ELECTRICAL MACHINE

Given a first intersection point of the surface of a rotor and a straight line that joins a central point of a permanent magnet on a stator side and a tooth tip section closest to the central point of the permanent magnet on the stator side, a flange is formed outward of an arc having, as the radius thereof, a distance from a second intersection point of the inner peripheral face of the stator and a straight line that joins the rotation axis of the rotor and the first intersection point, up to the tooth tip section. 1. A permanent-magnet-type rotating electrical machine comprising a rotor that forms a magnetic field using permanent magnets , and a stator that opposes the rotor across a gap ,wherein the stator has teeth protruding towards the rotor side, and a core back,the teeth each include a tooth central section around which a winding is wound, a tooth tip section which opposes the rotor and around which no winding is wound, and a flange which is formed between the tooth central section and the tooth tip section and protrudes on both sides in a circumferential direction, andgiven a first intersection point of a surface of the rotor and a straight line that joins a central point of a permanent magnet on the stator side and the tooth tip section closest to the central point of the permanent magnet on the stator side, the flange is formed outward of an arc having, as the radius thereof, a maximum value, for all rotation angles of the rotor, among a distance from a second intersection point of an inner peripheral face of the stator and a straight line that joins a rotation axis of the rotor and the first intersection point, up to the tooth tip section.2. The permanent-magnet-type rotating electrical machine according to claim 1 ,wherein the minimum height of the flange is smaller than ½ the minimum width of the tooth central section.3. The permanent-magnet-type rotating electrical machine according to claim 1 ,wherein the number of poles X of the rotor and the number ...

IRRIGATION MOTOR AND GEARBOX TEMPERATURE MONITORING AND CONTROL SYSTEM

A control system for monitoring a motor and wheel drive gearbox of an irrigation system drive train. The control system includes a motor sensor for sensing an operating state of the motor and a gearbox sensor for sensing an operating state of the wheel drive gearbox. If the motor operating state exceeds a motor operating state threshold or changes too quickly, or if the wheel drive gearbox operating state exceeds a wheel drive gearbox operating state threshold or changes too quickly, the control system operates the drive train at a reduced capacity or in a modified mode such that the operating state is not exceeded or does not change too quickly. 1. A control system for monitoring a wheel drive gearbox of an irrigation system drive train , the wheel drive gearbox including a sensor configured to sense a gearbox operating state of the wheel drive gearbox , the control system comprising: receive data from the sensor representing the gearbox operating state;', 'determine whether the gearbox operating state exceeds a gearbox operating state threshold or indicates a rate of change above a gearbox operating state rate of change threshold; and', 'if the gearbox operating state exceeds the gearbox operating state threshold or indicates a rate of change above the gearbox operating state rate of change threshold, generate and transmit a command and/or enact an operating change so that the drive train continues to operate such that the gearbox operating state does not exceed the gearbox operating state threshold or indicates that the gearbox operating state rate of change does not exceed the gearbox operating state rate of change threshold., 'a controller configured to2. The control system of claim 1 , the irrigation system drive train further including a motor claim 1 , the control system being further configured to:be communicatively coupled to a motor sensor configured to sense a motor operating state of the motor;receive data from the motor sensor representing the motor ...

WIPER DEVICE

A wiper device is provided. A boost control unit, if a duty ratio has reached an upper limit value determined in advance, and if the rotational speed of a motor is less than a target rotational speed, varies an advance angle and an energization angle associated with the energization of the motor in accordance with the target rotational speed. An overtemperature protection unit monitors a load state of the motor, and, upon detecting a high-load state, performs a first protection control for decreasing the rotational speed of the motor. A demagnetization protection unit, upon receipt of an operating signal from a wiper switch when the temperature detected by means of a temperature sensor exceeds a first threshold and the first protection control is being performed, performs a second protection control for fixing the advance angle and energization angle of the motor by prohibiting the operation of the boost control unit. 1. A wiper device which controls a duty ratio in accordance with a target rotation speed instructed by an operation of a wiper switch and causes a wiper member to perform a wiping operation using a motor , comprising:a temperature sensor which detects a temperature of the motor;a boost control unit which varies an advance angle and an energization angle associated with energization of the motor in accordance with the target rotation speed in a case in which the duty ratio has reached a predetermined upper limit value and a rotation speed of the motor is less than the target rotation speed;a first protection unit which monitors a load state of the motor and performs a first protection control for decreasing the rotational speed of the motor when a high-load state of the motor is detected; anda second protection unit which performs a second protection control for fixing the advance angle and energization angle of the motor by prohibiting an operation of the boost control unit when a first condition has been satisfied in a case in which reception of an ...

ELECTRIC MACHINE HAVING INCREASED OPERATIONAL SAFETY

The disclosure relates to a redundant electric machine for driving a propulsion means with increased operational safety. The machine may include two systems, with each system including a stator winding system and a rotor assigned thereto with permanent magnets, wherein the rotors are fastened on a common shaft for driving the propulsion means. If a fault occurs in one of the stator winding systems, the rotor, which continues to rotate, has to be prevented from inducing electric voltages in the stator winding system because this may lead to a fire in the machine. A demagnetization apparatus is therefore provided which, in a targeted manner, demagnetizes the permanent magnets of the rotor assigned to the faulty stator winding system such that the inducing of electric voltages is prevented. 1. An electric machine comprising:a winding system group comprising at least one stator winding system;a rotor arrangement with at least two rotors; anda demagnetization device comprising a heating apparatus,wherein each rotor of the rotor arrangement comprises at least one permanent magnet as a magnetic device,wherein each rotor of the rotor arrangement is assigned to a stator winding system of the winding system group and is rotatable relative to the stator winding system assigned thereto,wherein each stator winding system of the winding system group and the rotor, assigned to the respective stator winding system of the rotor arrangement are arranged so as to form a respective air gap between one another, such that the respective stator winding system and the rotor are configured to interact electromagnetically with one another,wherein, in event of a fault in a faulty stator winding system of the winding system group, a targeted demagnetization of the magnetic device of the rotor assigned to the faulty stator winding system is configured to be carried out by the demagnetization device,wherein the heating apparatus has a heating-up device assigned to each rotor of the rotor ...

Electric power steering apparatus

An electric power steering apparatus of a vector control system that drives and controls a motor by an inverter and applies an assist torque to a steering system of a vehicle, including the first compensation function to perform a dead time (DT) compensation based on respective phase motor terminal voltages and respective phase duty command values, the second compensation function to perform a DT compensation based on steering assist command values, the third compensation function to perform the DT compensation based on dq-axis current command values, and a temperature detecting section to detect temperature of ECU, wherein the correction of the DT compensation is performed based on the temperature, wherein switches of the compensation functions are performed by using a conditional branch due to software and a gradual-changing switch, wherein the dq-axis DT compensation values after the conditional branch and the gradual-changing switch are performed are calculated, and wherein the dq-axis voltage command values are compensated by the dq-axis DT compensation values.

一种永磁同步电机的转子温度监测方法及系统

本申请公开了一种永磁同步电机的转子温度监测方法及系统，该方法及系统首先获取永磁同步电机定子的a相的线电流和b相的线电流，分别作为第一线电流和第二线电流，同时还获取定子的a相和b相之间的线电压，然后将第一线电流、第二线电流、线电压、永磁体同步电机的电感参数、转子的永磁体的温度特性方程代入预设的转子永磁体温度表达式，计算得到转子温度。本转子温度监测方法及系统无需通过在转子中预埋温度传感器对转子永磁体的温度进行监测，能够避免通过配置温度传感器对转子永磁温度进行监测带来的系统的可靠性低的问题。

电机控制

本发明涉及用于电机2的驱动系统，包括：驱动级15、被设置为控制该驱动级的操作以控制到电机2的驱动电流的控制设备16、以及被设置为生成指示该系统的固定部件的温度的温度输出的传感设备30。控制设备被进一步设置为根据指示该驱动电流的至少一个分量的电流指标和所述温度输出来得到指示电机转子温度的转子温度指标。

Estimation method and estimation system for motor rotor temperature

本发明公开了一种转子温度的估算方法，包括在电机上电时获取静止时长、下电温度和预设函数，并根据预设函数确定与下电温度和静止时长对应的初始温度；获取电机处于工作状态时的温升值；而后将初始温度与温升值相加得到转子的当前温度，其中，静止时长为上电时刻与电机上一次下电时刻的时间差；下电温度为电机上一次下电时的温度；预设函数为描述电机下电后转子的温度随时间变化的函数。本申请提供的估算方法通过预设函数确定电机上电时刻转子的初始温度，在初始温度的基础上计算转子的当前温度，从而提高了估算结果的准确性。本发明还公开了转子温度的估算系统，具有上述有益效果。

Temperature protection device for vehicle alternator control device

Motor and for controlling the method for this motor

一种便携式电动工具的单相通用电动机(100)，即具有串联地连接的定子(2)和转子绕组(7)的电动机，该电动机包括电动机控制系统(400)，该电动机控制系统包括：电流测量装置(402)，用于直接地或间接地测量转子绕组(7)中的电流，提供一个转子电流值/多个转子电流值；环境温度测量/估计装置(404)，用于测量或估计环境空气温度，提供一个空气温度值/多个空气温度值；转子温度估计装置(406、407、408、409、410、411)，用于至少基于该一个转子电流值/多个转子电流值以及该一个空气温度值/多个空气温度值来估计转子温度。

Control method and device of permanent magnet synchronous motor and motor controller

本发明提供了一种永磁同步电机的控制方法、装置和电机控制器，涉及永磁同步电机控制的技术领域，包括获取永磁同步电机的工作情况，工作情况包括恒定冷却条件和非恒定冷却条件；通过工作情况和转子温升规则，得到恒定冷却条件下的电机转子温升变化率和非恒定冷却条件下的电机转子温度变化率；根据恒定冷却条件下的电机转子温升变化率和非恒定冷却条件下的电机转子温度变化率，计算永磁同步电机的转子温度值，结合电机实际工作情况对转子温度的影响，实现对转子温度的准确监测，进而保证电机的可靠性和应用该永磁同步电机的电动汽车的安全性。

System mode prediction

一种系统状态预测方法包括以下步骤：观测第一状态向量，第一状态向量包括物理系统A中的状态变量；利用系统A的数据驱动模型基于第一状态向量确定第一预测向量；利用系统A的基于物理特性的模型基于第一状态向量确定第二预测向量；训练预测融合算子以基于第一和第二预测向量确定第三预测向量；关于第三预测向量和另一个第一状态向量验证预测融合算子，所述另一个第一状态向量涉及与第三预测向量相同的时间。

Electrical machine safety system

An electrical machine system comprising a permanent magnet assembly (14) having a magnetic field and a plurality of conductive coils (24), the magnet assembly and coils arranged for relative rotation between the coils and magnetic field in the manner of an electrical generator or motor, the system further comprising a current injector (26) electrically connected to said coils and arranged selectively to supply a current signal thereto, the current signal being asynchronous with the frequency of rotation between the permanent magnet assembly and coils so as to heat and thereby demagnetise one or more magnet (16) within said permanent magnet assembly.

Electrical machine safety system

An electrical machine system including a permanent magnet assembly having a magnetic field and a plurality of conductive coils, the magnet assembly and coils arranged for relative rotation between the coils and magnetic field in the manner of an electrical generator or motor, the system further comprising a current injector electrically connected to said coils and arranged selectively to supply a current signal thereto, the current signal being asynchronous with the frequency of rotation between the permanent magnet assembly and coils so as to heat and thereby demagnetise one or more magnet within said permanent magnet assembly.

Motor drive apparatus and vehicle mounted with same

马达驱动装置利用来自直流电源（20）的电力驱动电动发电机（MG1、MG2）。电动发电机（MG1、MG2）利用通过使驱动电流在定子的线圈中流动而产生的电流磁场，使设置有永磁体的转子旋转。并且，马达驱动装置的ECU（300）控制变换器（130），以在定子的线圈的至少1相上叠加偏移电流使设置于转子的永磁体升温，所述变换器（130）构成为将来自直流电源（20）的直流电力变换为用于驱动电动发电机（MG1、MG2）的交流电力。

Motor control device

코일 온도 추정부(12)는, 미리 주어진 모터(1)의 코일 등가 저항, 열용량 및 열저항, 및 전압 검출 회로(17)가 검출하는 모터(1)에의 인가 전압 및 외부 입력되는 Duty비 지령치에 의거하여, 모터(1)의 코일 온도를 추정한다. 온도 이상 판정부(13)에 의해 코일 온도가 정상 온도가 아니라고 판정된 경우, Duty 제한부(14)가 Duty비 지령치를 낮은 값으로 제한하고 나서 FET 구동 회로(15)에 출력한다. The coil temperature estimating section 12 compares the coil equivalent resistance, the heat capacity and the thermal resistance of a given motor 1 and the voltage applied to the motor 1 detected by the voltage detecting circuit 17 and the duty ratio set value And estimates the coil temperature of the motor (1). When it is determined by the temperature abnormality determination section 13 that the coil temperature is not the normal temperature, the duty limiter 14 limits the duty ratio instruction value to a low value and outputs it to the FET drive circuit 15. [

Motor control device

Control apparatus for rotary electric machine, rotary electric machine drive system, and control method for rotary electric machine

本发明公开了一种用于旋转电机的控制设备和控制方法、旋转电机驱动系统。用于具有旋转元件（20）的旋转电机（12）的控制设备（16）包括磁体温度获取部分（60）、冷却剂温度检测部分（62）和温度控制部分（64），该旋转元件（20）包括永磁体（24）。磁体温度获取部分获取关于永磁体的温度的信息。冷却剂温度检测部分检测至少对旋转元件进行冷却的冷却剂的温度。当永磁体的温度小于或等于第一阈值温度并且冷却剂的温度小于或等于第二阈值温度时，温度控制部分执行永磁体的升温控制。

Temperature monitoring device, temperature monitoring method, information processing program, and recording medium

Vacuum pump and its control method

본 발명에 1형태에 따른 진공펌프는 펌프 본체와, 제1 온도센서와, 모터와, 제어 유닛을 구비한다. 상기 펌프 본체는 회전축과, 금속제의 케이싱부를 갖는다. 상기 제1 온도센서는 상기 케이싱부에 장착되고, 상기 케이싱부의 온도를 검출한다. 상기 모터는 영구자석을 포함해서 상기 회전축에 장착된 로터 코어와, 복수의 코일을 가지는 스테이터 코어와, 상기 로터 코어를 수용하는 캔을 갖는다. 상기 제어 유닛은 구동회로와, 보정회로를 갖는다. 상기 구동회로는 미리 설정된 유기전압 정수를 기초로 상기 모터를 회전시키는 구동 신호를 상기 복수의 코일로 공급한다. 상기 보정회로는,상기 제1 온도센서의 출력에 의거하여 상기 유기전압 정수를 보정한다. A vacuum pump according to an aspect of the present invention includes a pump body, a first temperature sensor, a motor, and a control unit. The pump body has a rotating shaft and a metal casing. The first temperature sensor is mounted on the casing and detects the temperature of the casing. The motor includes a rotor core including a permanent magnet and mounted on the rotating shaft, a stator core having a plurality of coils, and a can for accommodating the rotor core. The control unit has a driving circuit and a correction circuit. The driving circuit supplies a driving signal for rotating the motor to the plurality of coils based on a preset induced voltage constant. The correction circuit corrects the induced voltage constant based on the output of the first temperature sensor.

Control apparatus and control method

従来の制御装置では、三相短絡運転時の磁石温度推定において、回転速度が低い場合にはｑ軸電流が流れるために、誘起電圧の推定精度が低いという課題があった。この発明は、三相短絡運転時において磁石磁束または磁石温度をｄ軸電流のみを用いる場合よりも高い精度で推定することを目的とするものである。制御装置（１）は、永久磁石を有する永久磁石式同期機（１０）の三相端子（５１−１）〜（５１−３）を短絡させる相短絡部（５０）を備え、相短絡部（５０）によって三相端子（５１−１）〜（５１−３）を短絡させて永久磁石式同期機（１０）を運転する三相短絡運転時には、ｄ軸特性およびｑ軸特性に基づいて、永久磁石の磁石状態を推定するものである。 In the conventional control device, the magnet temperature estimation during the three-phase short-circuit operation has a problem that the estimation accuracy of the induced voltage is low because the q-axis current flows when the rotation speed is low. An object of the present invention is to estimate the magnet magnetic flux or the magnet temperature with higher accuracy than when only the d-axis current is used during the three-phase short-circuit operation. The control device (1) includes a phase short-circuit portion (50) that short-circuits the three-phase terminals (51-1) to (51-3) of the permanent magnet type synchronous machine (10) having a permanent magnet. 50), the three-phase terminals (51-1) to (51-3) are short-circuited to operate the permanent magnet synchronous machine (10). The magnet state of the magnet is estimated.

Diagnosis of demagnetization by flux linkage

Die Beschreibung umfasst ein Verfahren zur Ermittlung der Magnetisierung eines Dauermagnets einer permanentmagneterregten Synchronmaschine 4 eines Lenksystems umfassend den Schritt: Bestimmen der Flussverkettung Ψp der permanentmagneterregten Synchronmaschine 4. The description comprises a method for determining the magnetization of a permanent magnet of a permanent magnet-excited synchronous machine 4 of a steering system, comprising the step: determining the flux linkage Ψp of the permanent magnet-excited synchronous machine 4.

Method for determining a temperature of an engine for a motor vehicle

Method for determining a temperature of an engine (2) for a motor vehicle (1), comprising at least the following method steps: a) receiving at least one vibration signal (5) which characterizes a vibration of at least one part of the engine (2), b) determining a first value of the temperature of the engine (2) in a manner which is dependent on the vibration signal (5).

Induction motor overheat monitoring method, induction motor monitoring device, and induction motor control system

METHOD FOR CONTROLLING AN ELECTRIC MACHINE FOR DETERMINING THE ROTOR TEMPERATURE

ENGINE-GENERATOR TYPE A INDUCTIVE WINDING

DEVICE FOR CONTROLLING A MOTOR VEHICLE ALTERNATOR AND CORRESPONDING ALTERNATOR

Le dispositif de pilotage d'alternateur est du type de ceux asservissant une tension continue (B+A) générée par l'alternateur (11) à une consigne de tension prédéterminée (U0) en contrôlant l'intensité d'un courant d'excitation (IEXC) circulant dans un circuit d'excitation de l'alternateur. Conformément à l'invention, le dispositif comprend une boucle d'asservissement en tension (7) et une boucle d'asservissement en température (17) qui comporte un capteur de température fournissant une température courante (T) de composants de l'alternateur, un soustracteur (19) fournissant une erreur de température (ϵT) entre la température courante (T) et une température maximale admissible (Tmax) et un module de commande (20) fournissant un pourcentage d'excitation maximal admissible (rmax) en fonction de l'erreur de température selon une loi de commande prédéterminée. The alternator control device is of the type of those controlling a DC voltage (B + A) generated by the alternator (11) at a predetermined voltage set point (U0) by controlling the intensity of an excitation current (IEXC) flowing in an excitation circuit of the alternator. According to the invention, the device comprises a voltage control loop (7) and a temperature control loop (17) which comprises a temperature sensor providing a current temperature (T) of alternator components, a subtractor (19) providing a temperature error (εT) between the current temperature (T) and a maximum allowable temperature (Tmax) and a control module (20) providing a maximum allowable excitation percentage (rmax) as a function of the temperature error according to a predetermined control law.

ENGINE-GENERATOR TYPE A INDUCTIVE WINDING

L'invention concerne un moteur-générateur de type à enroulement inducteur, qui comprend : une machine dynamo-électrique (40) qui possède un enroulement inducteur ; une section de détection de courant d'excitation (120) pour détecter un courant d'excitation ; une section décidant de la restriction du courant d'excitation (142) pour décider si la valeur de décision a atteint ou pas une valeur de seuil de décision prédéterminée ; et un contrôleur de courant d'excitation (110) destiné à contrôler le courant d'excitation circulant dans l'enroulement d'excitation afin que le courant d'excitation soit limité à une valeur admissible prédéterminée dans un cas où la section décidant de la restriction du courant d'excitation (142) décide que la valeur de décision a atteint la valeur de seuil de décision prédéterminée. The invention relates to an inductor winding motor-generator, comprising: a dynamo-electric machine (40) having an inductor winding; an excitation current detecting section (120) for detecting an excitation current; a section deciding the restriction of the excitation current (142) to decide whether or not the decision value has reached a predetermined decision threshold value; and an excitation current controller (110) for controlling the excitation current flowing in the excitation winding so that the excitation current is limited to a predetermined permissible value in a case where the deciding section of the excitation current is restriction of the excitation current (142) decides that the decision value has reached the predetermined decision threshold value.

ROTATING ELECTRIC MACHINE FOR MOTOR VEHICLE

ROTATING ELECTRIC MACHINE TYPE WITH INDUCTIVE WINDING

L'invention concerne une machine électrique rotative de type à enroulement inducteur (40) qui inclut un moteur-générateur (50) ; une unité de détection de courant inducteur (120) ; une unité de commande de courant inducteur (110); une section de détermination de limitation de courant inducteur (142) qui calcule une valeur d'intégration de courant inducteur et détermine si la valeur d'intégration de courant inducteur atteint ou non une valeur seuil prédéterminée ; et une section d'ordre de limitation de courant inducteur (143) qui, lorsqu'il est déterminé que la valeur d'intégration de courant inducteur atteint la valeur seuil prédéterminée, produit un ordre qui fixe le courant inducteur à une valeur inférieure ou égale à une valeur de limitation de courant inducteur prédéterminée à l'unité de commande de courant inducteur (110) pendant un temps de limitation prédéterminé. The invention relates to a rotary electric winding type machine (40) which includes a motor generator (50); an inductive current detecting unit (120); an inductive current control unit (110); an inductive current limiting determining section (142) which calculates an inductor current integrating value and determines whether or not the inductor current integrating value reaches a predetermined threshold value; and an inductive current limiting command section (143) which, when it is determined that the inductor current integrating value reaches the predetermined threshold value, produces an order which sets the inductor current to a value less than or equal to to a predetermined inductive current limiting value at the inductive current control unit (110) for a predetermined limiting time.

METHOD AND SYSTEM FOR DETERMINING INTERNAL TEMPERATURES OF A SYNCHRONOUS ELECTRIC MACHINE USING STATE OBSERVERS

L'invention concerne un procédé de détermination des températures (2) internes (températures des bobines et de l'aimant) d'une machine électrique synchrone (4) au moyen d'observateurs d'état de la résistance des bobines et du flux magnétique de l'aimant. L'invention concerne par ailleurs un procédé de diagnostic, un procédé et un système de commande (3) d'une machine électrique synchrone à partir des températures internes déterminées. The invention relates to a method for determining the internal temperatures (2) (coil and magnet temperatures) of a synchronous electric machine (4) by means of state observers of the resistance of the coils and of the magnetic flux of the magnet. The invention further relates to a diagnostic method, a method and a control system (3) of a synchronous electric machine from the determined internal temperatures.

Vacuum pump and control method thereof

本发明的一形态的真空泵，具有泵主体、第一温度传感器、马达以及控制单元。上述泵主体具有旋转轴和金属制成的壳体部。上述第一温度传感器安装于上述壳体部，并检测上述壳体部的温度。上述马达具有包括永磁体且安装于上述旋转轴的转子铁芯、具有多个线圈的定子铁芯以及收纳上述转子铁芯的壳。上述控制单元具有驱动电路和修正电路。上述驱动电路基于预先设定的感应电压常数，向上述多个线圈供给使上述马达旋转的驱动信号。上述修正电路基于上述第一温度传感器的输出，来修正上述感应电压常数。

DEVICE FOR CONTROLLING A MOTOR VEHICLE ALTERNATOR AND CORRESPONDING ALTERNATOR

Control device for rotating electrical machine, and rotating electrical machine drive system including control device

本发明提供了用于具有定子线圈和转子磁体(24)的旋转电机(12)的控制装置(16)以及包括该控制装置的旋转电机驱动系统。所述控制装置包括：反电动势电压计算单元(62)，其计算在所述旋转电机(12)的工作期间在所述定子线圈中生成的反电动势电压；制冷剂温度获取单元(64)，其获取冷却所述旋转电机(12)的制冷剂的温度；特性校正单元(66)，其基于所计算的反电动势电压和所获取的制冷剂温度校正反电动势电压特性，所述反电动势电压特性限定所述转子磁体(24)的温度与所述反电动势电压之间的相互关系；以及温度推定单元(68)，其使用校正后的反电动势电压特性来推定所述转子磁体(24)的温度。

Electric machine

Elektrische Maschine mit einer Einrichtung (110) zur Ermittlung einer Temperatur eines Rotors (114), wobei die Einrichtung (110) einen am Stator (118) oder an einem Gehäuse (120) der elektrischen Maschine vorgesehenen Primärkreis (122) mit einer Primärspule (130) und einen am Rotor (114) ausgebildeten Sekundärkreis (124) mit einer Sekundärspule (136) und einer temperaturabhängigen Last (138) umfasst. Die Einrichtung (110) ist eingerichtet, bei einer Einspeisung der Signalspannung in den Primärkreis (122) durch eine induktive Kopplung zwischen dem Primärkreis (122) und dem Sekundärkreis (124) eine Sekundärspannung in dem Sekundärkreis (124) zu induzieren, wodurch ein durch die temperaturabhängige Last (136) fließender Sekundärstrom Isekundärim Sekundärkreis und infolge des Sekundärstroms Isekundärein rotortemperaturabhängiger Primärstrom Iprimärim Primärkreis (122) bewirkt wird. Die Einrichtung (110) ist weiterhin eingerichtet, mittels der Messvorrichtung (126) den Primärstrom Iprimärund/oder eine Phasenverschiebung zwischen der Signalspannung und dem Primärstrom Iprimärzu erfassen und basierend auf dem Wert des Primärstroms Iprimäroder basierend auf der Phasenverschiebung die Temperatur des Rotors (114) zu ermitteln. Die Primärspule (130) weist eine erste axiale Länge (138) in einer Richtung parallel zu einer Rotationsachse (116) des Rotors (114) auf, wobei die Sekundärspule (134) eine zweite axiale Länge (140) in einer Richtung parallel zu der Rotationsachse (116) aufweist, wobei sich die erste axiale Länge (138) von der zweiten axialen Länge (140) unterscheidet. Electric machine with a device (110) for determining a temperature of a rotor (114), the device (110) having a primary circuit (122) with a primary coil (130) provided on the stator (118) or on a housing (120) of the electric machine ) and a secondary circuit (124) formed on the rotor (114) with a secondary coil (136) and a temperature-dependent load (138). The device (110) is set up to induce a secondary ...

Anomaly detection device for a permanent magnet synchronous electric motor

设置在微计算机(5)中的磁体温度异常检测部(30)在两电动机(1、2)的转子转速(ωe)、线圈电流(Id、Iq)、线圈电感(Ld、Lq)都是相同的值这样的条件下，根据与第一电动机(1)相对应的q轴电压指令值(Vql*)和与第二电动机(2)相对应的q轴电压指令值(Vqr*)之间的差(Vql*-Vqr*)，来求出两电动机(1、2)的磁通量差的变化率(d(|Φml-Φmr|)/dt)，在该磁通量差的变化率(d(|Φml-Φmr|)/dt)超过规定阈值(Sh 1)的情况下，判断为在至少一个电动机的永磁体中产生了温度异常。

Anomaly detector of permanent magnet synchronous electric motor

Under a condition that rotor rotation speeds ωes are equal, winding wire currents Id, Iq are equal, and winding wire inductances Ld, Lq are equal in first and second electric motors ( 1, 2 ), a magnet temperature anomaly detector ( 30 ) provided in a microcomputer ( 5 ) calculates a change ratio d(|Φml−Φmr|)/dt of a magnetic flux difference between the first and second electric motors ( 1, 2 ) based on the difference Vql*−Vqr* between a q-axis voltage command value Vql* corresponding to the first electric motor ( 1 ) and a q-axis voltage command value Vqr corresponding to the second electric motor ( 2 ), and then when the change ratio d(|Φml−Φmr|)/dt of the magnetic flux difference is more than a predetermined threshold Sh 1 , it is determined that a permanent magnet of at least any one of the electric motors ( 1, 2 ) has a temperature anomaly.

Motor drive circuit and method of driving a motor

A drive system for a brushless DC motor having a rotor includes at least one permanent magnet and a stator including at least one phase winding. The system has a drive circuit including a switch associated with the winding for varying the current passing through the winding; a rotor position sensor arranged to sense the position of the rotor; and a controller arranged to provide drive signals to control the switch. The drive system is further arranged to receive a temperature signal that has a value dependent upon the temperature of the at least one magnet of the rotor. The controller is arranged to vary the phase of the current passing through the winding relative to the rotor position dependent upon the temperature of the rotor magnet.

Method and apparatus for electric motor control

Method for determining a rotor temperature of an electric motor in a hybrid drive of a motor vehicle

The invention relates to a method for determining a rotor temperature of an electric motor in a hybrid drive of a motor vehicle, wherein preferably a permanent-magnet-excited synchronous machine is used as the electric motor, wherein the rotor temperature is determined in dependence on a temperature-dependent machine parameter, which is determined from a short-circuit current during an active short circuit of power electronics supplying current to the electric motor. In a method in which the actual rotor temperature is determined regardless of the operating state of the motor vehicle, the active short circuit is set in a generating operating mode of the electric motor during active driving operation of the motor vehicle.

Device for controlling a motor vehicle alternator, and corresponding alternator

The invention relates to a device for controlling an alternator of the type that controls a DC voltage (B+A) generated by the alternator ( 11 ) according to a predetermined set voltage (U 0 ) by monitoring the intensity of an energizing current (I EXC ) flowing through an energizing circuit of the alternator. According to the invention, the device includes a voltage-control loop ( 7 ) and a temperature-control loop ( 17 ) which comprises a temperature sensor supplying a current temperature (T) of components of the alternator, a subtracter ( 19 ) supplying a temperature error (ϵ t ) between the current temperature (T) and a maximum acceptable temperature (T max ) and a control module ( 20 ) supplying a maximum admissible energizing percentage (r max ) in accordance with the temperature error according to a predetermined control law.

Rotating machine control device

【課題】回転電機の回転速度及びトルクの動作点により変化する銅損及び鉄損による回転電機の各部の発熱量及び放熱量を考慮すると共に、演算負荷の増加を抑制しつつ、回転電機の過渡的な温度を精度よく推定することができる回転電機の制御装置を提供する。【解決手段】推定演算周期毎の演算タイミングで、回転電機の回転速度、回転電機のトルク情報、及び基準時点の回転電機の温度と、基準時点から推定演算周期の経過後の回転電機の温度との関係が予め設定された温度予測データを参照し、現在の回転電機の回転速度、現在の回転電機のトルク情報、及び前回の演算タイミングで算出された回転電機の温度の推定値に対応する、前回の演算タイミングから推定演算周期の経過後の回転電機の温度の推定値を算出する回転電機の制御装置。【選択図】図４ PROBLEM TO BE SOLVED: To consider a heat generation amount and a heat dissipation amount of each part of a rotary electric machine due to copper loss and iron loss which change depending on the operation point of the rotational speed and torque of the rotary electric machine, and to suppress an increase in a calculation load while transient of the rotary electric machine. Provided is a control device for a rotary electric machine capable of accurately estimating a typical temperature. SOLUTION: At the calculation timing for each estimated calculation cycle, the rotation speed of the rotary electric machine, the torque information of the rotary electric machine, the temperature of the rotary electric machine at a reference time, and the temperature of the rotary electric machine after the elapse of the estimated calculation cycle from the reference time. Corresponds to the current rotation speed of the rotary electric machine, the torque information of the current rotary electric machine, and the estimated value of the temperature of the rotary electric machine calculated at the previous calculation timing by referring to the temperature prediction data in which the relationship is set in advance. A control device for a rotating electric machine that calculates an estimated value of the temperature of the rotating electric machine after the elapse of the estimated calculation cycle from the previous calculation timing. [Selection diagram] FIG. 4

Method for service meter

本发明涉及一种用于运行电动机（9）的方法，该电动机作为电动伺服驱动装置使用在机动车的电子伺服转向系统中以用于伺服支持，该电动机具有多个磁体元件（9a）和多个相绕组，并且该电动机被电子伺服转向系统的电子调节和/或控制器（11）控制和/或调节。借助温度模型（13）在电动机的运行期间连续确定电动机的至少一个磁体元件的温度；利用电动机的所述至少一个磁体元件的借助温度模型确定的温度，在考虑电动机的所述至少一个磁体元件的能被预定的界限温度的情况下，限制在电动机的至少一个相绕组中流过的电流（l U,V,W ）。本发明还涉及用于运行机动车的电子伺服转向系统的方法、机动车的电子调节和/或控制器以及机动车的电子伺服转向系统。

Three-phase redundant motor device for electric power steering devices

To provide a three phase duplexing motor for electric power steering apparatus that can manage increase in a supply current and can manage influence on motor, when increasing a supply current to the three phase windings of the normal set. An three phase duplexing motor (50) for electric power steering apparatus sets 0 to a supply current to three phase winding (1, 2) of abnormality occurrence set, and increases a supply current to three phase windings (1, 2) of the normal set, with a preliminarily set increase upper limit current value as an upper limit.

Rotor temperature monitoring method and system for permanent magnet synchronous motor