Title:
MOTOR CONTROL DEVICE, MOTOR UNIT, AND MOTOR CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2021/235206
Kind Code:
A1
Abstract:
The present invention reduces unstable motion of a motor during deceleration of the motor revolution speed. The present invention has: a plurality of sensors that each detect the rotary position of a rotor and output a position detection signal; a speed-of-revolution determination unit that determines whether or not the speed of revolution of a brushless motor is equal to or lower than a predetermined threshold, on the basis of the position detection signals; and a motor control unit. A current conduction control unit provided to the motor control unit uses, between a first mode and a second mode, different signals serving as a trigger for the current conduction timing of each phase. In the first mode, the current conduction timing to the second phase is advanced relative to the timing at which the position detection signal of a first sensor is turned on. In the second mode, the current conduction timing to the second phase is retarded relative to the timing at which the position detection signal of the first sensor is turned on.
Inventors:
OHORI RYO (JP)
TAI TAKASHI (JP)
TAI TAKASHI (JP)
Application Number:
PCT/JP2021/016901
Publication Date:
November 25, 2021
Filing Date:
April 28, 2021
Export Citation:
Assignee:
MITSUBA CORP (JP)
International Classes:
H02P6/16
Foreign References:
| JP2018118661A | 2018-08-02 | |||
| JP2002136168A | 2002-05-10 | |||
| JP2019161933A | 2019-09-19 | |||
| JPH0662592A | 1994-03-04 | |||
| JP2018133911A | 2018-08-23 |
Other References:
See also references of EP 4156495A4
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
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