A motor is driven by the ³-axis current (I ³ ) of a ³´ coordinate system that is an imaginary rotating coordinate system. A command current value preparation unit (30) sets the ³-axis command current value (I ³ *) based on the command steering torque (T*) and the detected steering torque (T). The command current value preparation unit (30) includes a command current increase/decrease amount calculation unit (30A) and an addition unit (30B). The command current increase/decrease amount calculation unit (30A) calculates the current increase/decrease amount (I ³ *) for the command current value (I ³ *) based on the sign of the command steering torque (T*) and the deviation (T (= T - T*)) of the detected steering torque (T) from the command steering torque (T*). The current increase/decrease amount (AI ³ *) calculated by the command current increase/decrease amount calculation unit (30A) is added to the immediately preceding value (I ³ *(n-1)) of the command current value (I ³ *) by the addition unit (30B). Thus, the command current value (I ³ *) in the present calculation cycle is calculated.


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    Title :

    Motor control unit and vehicle steering system


    Additional title:

    Motorsteuereinheit und Fahrzeuglenksystem
    Unité de commande de moteur et système de direction de véhicule


    Contributors:

    Publication date :

    2019-03-20


    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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