Title:
MOTOR CONTROL DEVICE, AND ELECTRIC POWER STEERING DEVICE PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2022/186315
Kind Code:
A1
Abstract:
A weak field controller (40) determines a d-axis current command correction value (Id_fw*) in weak field control in accordance with a voltage (Vdc) of a direct-current power source (60) and a voltage amplitude (Vamp) of a voltage command. A d-axis current final value calculator (22) outputs a d-axis current final value (Id**) calculated using a d-axis current command value (Id*) and the d-axis current command correction value (Id_fw*. The weak field controller (40) includes a voltage amplitude command limiter (42) which limits a voltage amplitude command (Vamp*) determined on the basis of the power source voltage (Vdc). The voltage amplitude command limiter (42) limits the voltage amplitude command (Vamp*) to a voltage amplitude command limit value (Vamp*_lim) when a motor state quantity, correlating with a rate of change over time when a sinusoidal wave center voltage of the voltage command crosses from negative to positive, is at least equal to a prescribed limit start value.
Inventors:
OBA KOHEI (JP)
MATSUKI YOSUKE (JP)
KANO RYO (JP)
MATSUKI YOSUKE (JP)
KANO RYO (JP)
Application Number:
PCT/JP2022/009028
Publication Date:
September 09, 2022
Filing Date:
March 03, 2022
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H02P21/05; H02P21/22
Domestic Patent References:
| WO2010116769A1 | 2010-10-14 |
Foreign References:
| JP2019017218A | 2019-01-31 | |||
| JP2003304697A | 2003-10-24 | |||
| JP2011125134A | 2011-06-23 |
Attorney, Agent or Firm:
HATTORI & PARTNERS (JP)
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