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    • 4. 发明专利
    • Electric power steering device
    • JP5295522B2
    • 2013-09-18
    • JP2007129629
    • 2007-05-15
    • 株式会社ジェイテクト
    • 祐子 松田浩 鈴木豪朗 米谷
    • B62D6/00B62D5/04B62D101/00B62D119/00B62D137/00
    • PROBLEM TO BE SOLVED: To provide an electric power steering device in which the generation of noise and vibration is effectively suppressed by a simple structure without increasing arithmetic processing. SOLUTION: In this electric power steering device, a microcomputer 17 comprises: an open control part 31 for calculating a d-axis voltage command value Vd*_op and a q-axis voltage command value Vq*_op by performing open control calculation; and a switching control part 32 for performing determination for switching from a current feedback control using F/B control parts 27d, 27q to open control using the open control part 31 and determination for returning to the current feedback control. The switching control part 32 comprises a vibration component detection part 33 as a vibration component detection means capable of detecting a vibration component included in steering torque τ as a signal related to the control output of a motor 12. When the vibration component is detected during low speed steering, the switching control part 32 determines that the switching from the current feedback control to the open control should be performed. COPYRIGHT: (C)2009,JPO&INPIT