Title:
SYNCHRONOUS MOTOR DRIVING DEVICE AND SYNCHRONOUS MOTOR DRIVING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/026625
Kind Code:
A1
Abstract:
Provided is a highly reliable synchronous motor driving device that is capable of highly accurately estimating and restricting a direct current, without the need for an additional configuration such as a dedicated current detection sensor. The present invention is characterized by comprising: a first direct current calculation unit that calculates a first direct current on the basis of a first voltage command value, the electric current value of a winding of a synchronous motor, and a battery voltage; a second direct current calculation unit that calculates a second direct current on the basis of the electric current value of the winding of the synchronous motor, the rotation speed of the synchronous motor, and a predetermined motor characteristic of the synchronous motor; a model error extraction unit that calculates inverter efficiency on the basis of the first direct current and the second direct current; a direct current correction unit that calculates an estimated direct current on the basis of the first direct current, the second direct current, and the inverter efficiency; and a direct current restriction unit that corrects the electric current command value of the winding on the basis of the estimated direct current and a direct current restriction value which is set in advance.
Inventors:
SATO HIROAKI (JP)
GOTO DAISUKE (JP)
IWASAKI KATSUYA (JP)
GOTO DAISUKE (JP)
IWASAKI KATSUYA (JP)
Application Number:
PCT/JP2022/022343
Publication Date:
March 02, 2023
Filing Date:
June 01, 2022
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02P21/22
Foreign References:
| JP2013233062A | 2013-11-14 | |||
| JP2016113111A | 2016-06-23 | |||
| US20210152112A1 | 2021-05-20 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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