Title:
MOTOR SHAFT STATE DETECTION METHOD, MOTOR CONTROL METHOD, MOTOR SHAFT STATE DETECTION DEVICE, MOTOR CONTROL DEVICE, VEHICLE HEIGHT ADJUSTMENT DEVICE, AND SADDLE-TYPE VEHICLE
Document Type and Number:
WIPO Patent Application WO/2021/186542
Kind Code:
A1
Abstract:
This motor shaft state detection method has: a rotation determination step for determining, using a detected current waveform of a motor, whether or not to be a non-rotational state in which the rotational speed of the motor is smaller than a predetermined speed; a current determination step for determining whether or not to be a supply state in which the absolute value of current supplied to the motor is larger than a predetermined reference value; and a determination step for, when it is determined to be the non-rotational state in the rotation determination step and it is determined to be the supply state in the current determination step, determining that the motor is in a shaft locked state.
Inventors:
TOKUHARA MASATO
Application Number:
PCT/JP2020/011694
Publication Date:
September 23, 2021
Filing Date:
March 17, 2020
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02P29/024
Foreign References:
| JP5155055B2 | 2013-02-27 | |||
| JP2004304880A | 2004-10-28 | |||
| JP2004308200A | 2004-11-04 | |||
| JP2016160968A | 2016-09-05 | |||
| JP2018144650A | 2018-09-20 |
Attorney, Agent or Firm:
FURUBE, Jiro et al. (JP)
Download PDF: