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    • 10. 发明专利
    • Control device for an electric motor drive device
    • JP5370748B2
    • 2013-12-18
    • JP2009127413
    • 2009-05-27
    • アイシン・エィ・ダブリュ株式会社
    • 志謙 陳鵬 賀
    • H02P21/00H02P27/04
    • PROBLEM TO BE SOLVED: To provide a device for control of motor drive units capable of increasing efficiency by reducing switching losses at a DC/AC conversion unit for converting DC voltages to AC voltages for power supply to AC motors, and capable of proper output of a torque according to a target torque to motors. SOLUTION: The device includes a voltage waveform control unit 9, which allows the DC/AC conversion unit to perform pulse width modulation control when a voltage index Δm indicating the levels of AC voltage command values Vd, Vq to the DC voltage Vdc is less than a prescribed waveform switching threshold, and allows the DC/AC conversion unit to perform square wave control for output of a square-wave voltage when the voltage index Δm is not less than a waveform switching threshold. When prescribed square wave control permission conditions are met even if the voltage index Δm is less than the waveform switching threshold, the voltage waveform control unit 9 allows the DC/AC conversion unit to perform square wave control, and a field adjustment unit 8 decides a field adjustment command value ΔId to perform stronger field control for strengthening a field magnetic flux of an AC motor. COPYRIGHT: (C)2011,JPO&INPIT