Title:
CONTROL DEVICE FOR ELECTRIC POWER STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/012644
Kind Code:
A1
Abstract:
This control device for an electric power steering device controls an inverter on the basis of a three-phase voltage command obtained in such a way that: three-phase current flowing through a synchronous motor is converted to d-axis current and q-axis current; proportional-integral control is performed on the deviation between a d-axis current command and the d-axis current, thereby calculating a d-axis voltage command; proportional-integral control is performed on the deviation between a q-axis current command and the q-axis current, thereby calculating a q-axis voltage command; and the d-axis voltage command and the q-axis voltage command are converted. When a q-axis proportional gain is denoted by Kpq, the time constant of a q-axis current control system is denoted by τq, a q-axis inductance or d-axis inductance is denoted by L, and a constant larger than 0 and less than 1 is denoted by Kq, the q-axis proportional gain is set according to the following equation, that is, Kpq = Kq/τq × L.
More Like This:
Inventors:
MORI TATSUYA (JP)
HIROTANI YU (JP)
HIROTANI YU (JP)
Application Number:
PCT/JP2018/026502
Publication Date:
January 16, 2020
Filing Date:
July 13, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P21/05; B62D6/00; H02P21/14
Domestic Patent References:
| WO2008072574A1 | 2008-06-19 |
Foreign References:
| JP2011254641A | 2011-12-15 | |||
| JP2003070280A | 2003-03-07 | |||
| JP2003189652A | 2003-07-04 | |||
| JP2001275381A | 2001-10-05 |
Other References:
KAGAKUJYOHO SHUPPAN CO., LTD., PRINCIPLES AND METHODS OF DESIGNING OF ENERGY SAVING MOTOR, July 2013 (2013-07-01), pages 101
OHMSHA, LTD.: "Sensorless vector control for AC drive system", September 2016, pages: 102
See also references of EP 3823159A4
OHMSHA, LTD.: "Sensorless vector control for AC drive system", September 2016, pages: 102
See also references of EP 3823159A4
Attorney, Agent or Firm:
SOGA, Michiharu et al. (JP)
Download PDF: