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    • 9. 发明公开
    • ELECTRIC POWER STEERING APPARATUS
    • EP3331158A1
    • 2018-06-06
    • EP17756238.6
    • 2017-02-10
    • NSK Ltd.
    • TSUBAKI Takahiro
    • H02P29/024B62D5/04H02P25/22
    • B62D5/0463B62D5/0481B62D5/0487H02P25/22H02P29/024H02P29/028
    • [Problem]
      An object of the present invention is to provide an electric power steering apparatus that can suppress deterioration of steering feeling by changing a current command value of a normal system in motor control by two systems when an abnormality occurs in any of the systems.
      [Means for solving the problem]
      An electric power steering apparatus that calculates a current command value to a motor having two-system motor windings for each system, comprises a current command value adjusting section that calculates the current command value by using a steering assist command value and a compensation current command value; and the current command value adjusting section has a normal-time coefficient used at normal time and an abnormal-time coefficient used at abnormal time that are set to each system, a value obtained by multiplying a value obtained by adding the steering assist command value and the compensation current command value by the normal-time coefficient is the current command value when the two systems are normal, and a value obtained by adding the compensation current command value to a value obtained by multiplying the steering assist command value by the abnormal-time coefficient is the current command value to a normal system of the systems when an abnormality occurs in any of the systems.