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1. (WO2009123113) MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE

Pub. No.:    WO/2009/123113    International Application No.:    PCT/JP2009/056496
Publication Date: Oct 8, 2009 International Filing Date: Mar 30, 2009
IPC: H02P 6/08
B62D 5/04
H02P 21/00
H02P 27/04
Applicants: JTEKT CORPORATION
株式会社ジェイテクト
UEDA, Takeshi
上田 武史
KARIATSUMARI, Yuji
狩集 裕二
NAGASE, Shigeki
長瀬 茂樹
NIGUCHI, Noboru
新口 昇
SUMASU, Hiroshi
須増 寛
Inventors: UEDA, Takeshi
上田 武史
KARIATSUMARI, Yuji
狩集 裕二
NAGASE, Shigeki
長瀬 茂樹
NIGUCHI, Noboru
新口 昇
SUMASU, Hiroshi
須増 寛
Title: MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE
Abstract:
An instruction current setting unit includes a target value correction unit which obtains a d-axis and a q-axis current instruction value i dc, i qc to be supplied to an open loop control unit, according to a d-axis and a q-axis current target value id*, iq*. When the d-axis and the q-axis target voltage value vd*, vq* calculated by a circuit equation of a motor from the d-axis and the q-axis target current values id*, iq* exceed a voltage limit, the target value correction unit (26) corrects the d-axis and the q-axis target current value id*, iq* by performing a weak magnetic flux control so that the d-axis and the q-axis voltage vd, vq and the d-axis and the q-axis current id, iq satisfy the following relations: √(vd2 + vq2) ≤ Vlim and √(id2 + iq2) ≤ Ilim. By performing this correction, it is possible to obtain the d-axis and the q-axis current instruction value i dc, i qc.