Provided is an AC rotating machine control device for reducing reverse torque at the time of shifting to sensorless control using an estimated rotational position or preventing failure of an AC rotating machine and a drive circuit for the AC rotating machine due to overcurrent. This AC rotating machine control device includes: rotational position estimation means 9 for calculating an estimated rotational position of the AC rotating machine 1 when a rotational position sensor 2 is determined to be abnormal; power limiting means 6 for limiting drive power supplied for driving the AC rotating machine; and power feed means 10 for, when sensor abnormality determination means 3 determines that the rotational position sensor is abnormal, on the basis of the estimated rotational position, supplying the AC rotating machine with power obtained by adding rotational position estimation power supplied for the rotational position estimation means to estimate the rotational position, to the drive power limited by the power limiting means, wherein the power limiting means 6 limits drive current at least during a predetermined period since the sensor abnormality determination means 3 determines that the abnormality occurs until estimated error of the estimated rotational position falls within a predetermined range.


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    Title :

    AC ROTATING MACHINE CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE EQUIPPED WITH SAME


    Additional title:

    DREHMASCHINENSTEUERUNGSVORRICHTUNG UND ELEKTRISCHE SERVOLENKUNGSVORRICHTUNG DAMIT
    DISPOSITIF DE COMMANDE DE MACHINE ROTATIVE À COURANT ALTERNATIF ET DISPOSITIF DE SERVO-DIRECTION ÉLECTRIQUE COMPORTANT CE DERNIER


    Contributors:

    Publication date :

    2020-08-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B62D MOTOR VEHICLES , Motorfahrzeuge / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES



    AC rotating machine control device and electric power steering device equipped with same

    NAKAJIMA SHUNSUKE / TSUCHIMOTO YUYA / KEZOBO ISAO et al. | European Patent Office | 2018

    Free access