MOTOR DRIVE CONTROL DEVICE, MOTOR UNIT, AND MOTOR DRIVE CONTROL METHOD

WIPO Patent Application WO/2023/228945

A1

The present invention improves the stability of the operation of a motor when a commutation mode is switched.　This motor drive control device (3) comprises: a control circuit (1) that generates a drive control signal (Sd); and a drive circuit (2) that drives the coil (41) of a motor (4) on the basis of the drive control signal (Sd). The control circuit (1) includes: a commutation mode setting unit (11) that sets as a communication mode, a first commutation mode in which the coil (41) is commutated on the basis of the detection result of zero crossing of a back electromotive force of the coil (41) or a second commutation mode in which the coil (41) is commutated so that the rotational speed of the motor (4) does not exceed a target rotational speed; a target rotational speed setting unit (14) that sets the target rotational speed; and a drive control signal generation unit (12) that generates the drive control signal (Sd) on the basis of the commutation mode set by the commutation mode setting unit (11). The target rotational speed setting unit (14) gradually reduces the target rotational speed to a final target value (st) when the commutation mode is switched from the first commutation mode to the second commutation mode.

IKEGAMI AZUSA (JP)
MIYAJI HARUKA (JP)
SHIMADA AYAKA (JP)
FUJII JUMPEI (JP)

PCT/JP2023/019180

November 30, 2023

May 23, 2023

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MINEBEA MITSUMI INC (JP)

H02P8/14; H02P6/182

JP2018038213A	2018-03-08
JP2018174605A	2018-11-08

EINSEL Felix-Reinhard et al. (JP)

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