There are provided a motor control device, an electric power steering device, and a vehicle that allow an electric motor to be accurately drive-controlled even when a failure occurs in a motor electric angle detection unit that detects a motor electric angle. When at least one of a resolver and an angle computation unit is diagnosed as being abnormal in an initial diagnosis after a system restart, a motor electric angle initial value is estimated on a basis of a response output of a three-phase electric motor in response to input of a motor drive signal to the three-phase electric motor, a motor electric angle estimation vale is calculated on a basis of an output shaft rotation angle detection value detected by an output-side rotation angle sensor and a relative offset amount estimated on a basis of the estimated motor electric angle initial value, and the three-phase electric motor is drive-controlled on a basis of the calculated motor electric angle estimation value.


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    Title :

    Motor Control Device, Electric Power Steering Device, and Vehicle


    Contributors:
    UKAI NOBUO (author)

    Publication date :

    2017-12-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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