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1. (WO2018123516) MOTOR CONTROL DEVICE, MOTOR SYSTEM, MOTOR CONTROL METHOD, AND INTEGRATED CIRCUIT DEVICE

Pub. No.:    WO/2018/123516    International Application No.:    PCT/JP2017/044179
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Sat Dec 09 00:59:59 CET 2017
IPC: H02P 21/05
H02P 21/22
Applicants: NIDEC CORPORATION
日本電産株式会社
Inventors: WATAHIKI Masanori
綿引 正倫
MORI Tomonari
森 智也
UEDA Tomoya
上田 智哉
Title: MOTOR CONTROL DEVICE, MOTOR SYSTEM, MOTOR CONTROL METHOD, AND INTEGRATED CIRCUIT DEVICE
Abstract:
A motor control device according to an embodiment of the present disclosure includes: a first circuit 10 that determines the d-axis zero-order current and the q-axis zero-order current; a second circuit 20 that determines the d-axis 6th-order harmonic current and the q-axis 6th-order harmonic current according to the position of a rotor; and a third circuit 30 that determines, as a d-axis current instruction value and a q-axis current instruction value, a value obtained by superposing the d-axis 6th-order harmonic current on the d-axis zero-order current and a value obtained by superposing the q-axis 6th-order harmonic current on the q-axis zero-order current, respectively. The amplitude id6 and phase θd6 of the d-axis 6th-order harmonic current and the amplitude iq6 and phase θq6 of the q-axis 6th-order harmonic current have values that lower the electrical angle 6th-order radial force in comparison to the case where both the amplitudes id6 and iq6 are zero, and that lower the electrical angle 8th-order radial force in comparison to the case where the amplitudes id6, iq6 and the phases θd6, θq6 are values minimizing the electrical angle 6th-order radial force.