An ECU (11) that controls a motor (12) includes: a target current value setting unit (30) setting a target current (It); a voltage detecting unit (50) detecting a detected voltage (Vd) on the basis of a detection signal from a voltage sensor (23); a voltage calculation unit (51) calculating an estimated voltage (Ve) on the basis of a power supply voltage (Vps) of a battery (24); and an induced voltage observer (38) calculating an induced voltage (E) generated at the motor (12) using an inter-terminal voltage (Vt) based on the estimated voltage (Ve) when the target current (It) is set to a value other than zero; whereas the induced voltage observer (38) calculates the induced voltage (E) using an inter-terminal voltage (Vt) based on the detected voltage (Vd) when the target current (It) is set to zero.


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    Title :

    Motor control unit and electric power steering system


    Additional title:

    Motorsteuereinheit und elektrisches Servolenkungssystem
    Unité de commande de moteur et système de direction assistée électrique


    Contributors:

    Publication date :

    2018-08-22


    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



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