[Problem] An object of the present invention is to provide a motor control unit that extracts a higher harmonic component, which is contained in back-EMFs of the dq-axis control system, by means of Taylor expansion (Maclaurin expansion), and suppresses a torque variation by precisely correcting a gain and a phase of the higher harmonic component for a q-axis current command value and the electric power steering apparatus equipped with the same. [Means for solving the problem] The present invention is the motor control unit that drives a brushless motor having three or more phases by using a vector control on a dq-axis rotary coordinate system, comprising: a current command value calculating section to calculate a d-axis current command value i d and a q-axis current command value i q based on a torque command value Ä c for the brushless motor, a rotational angle ¸ e and a motor angular speed É of the brushless motor, wherein the current command value calculating section extracts a higher harmonic component, which is contained in dq-axis back-EMFs of the brushless motor, by means of Taylor expansion, and corrects a gain and a phase of the higher harmonic component with a gain increasing and a phase lead, respectively, so as to compensate an attenuation due to a current control bandwidth.


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    Title :

    MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE EQUIPPED WITH SAME


    Additional title:

    MOTORSTEUERUNGSVORRICHTUNG UND DAMIT AUSGESTATTETE ELEKTRISCHE SERVOLENKUNG
    DISPOSITIF DE COMMANDE DE MOTEUR ET DISPOSITIF DE DIRECTION ASSISTÉE ÉLECTRIQUE LE COMPORTANT


    Contributors:

    Publication date :

    2019-10-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

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



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