A motor control device with which both high-accuracy current detection and improvement in voltage utilization factor are achieved is provided. When an ON time (t0) of any one of low potential side switching elements (FETs) corresponding to respective phases in a driving circuit is shorter than a detection time (ts) of a current value, a microcomputer estimates a phase current value of a current undetectable phase based on current values of two phases other than the current undetectable phase corresponding to the said FET (blind correction). Then, at the time of current detection using the blind correction, during current detection for two phases, other than the current undetectable phase, based on which the blind correction is performed, motor control signals for maintaining switching states of a switching arm corresponding to the current undetectable phase are output.


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    Title :

    MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING APPARATUS


    Additional title:

    MOTORSTEUERUNGSVORRICHTUNG UND ELEKTRISCHE SERVOLENKVORRICHTUNG
    DISPOSITIF DE COMMANDE DE MOTEUR ET APPAREIL DE DIRECTION ÉLECTRIQUE


    Contributors:

    Publication date :

    2018-12-12


    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 / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen



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