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

WIPO Patent Application WO/2023/228928

A1

The present invention improves the drive efficiency of a motor.　A motor drive control device (1) includes: a target point determination unit (12) that is synchronized to the induced voltage of a U-phase coil (Lu) of a motor (5) and determines a target point (P) for the zero cross of U-phase coil current (Iu) on the basis of a position detection signal (Shu) corresponding to the rotational position of the rotor of the motor (5); a current zero cross estimation unit (14) that estimates the zero cross point (Q) of the U-phase coil current (Iu) on the basis of the occurrence of a switch in the order of the timing at which the drive voltage (Vu) of the U-phase coil (Lu) reaches a high level and the timing at which a PWM signal (Suu) for turning a high side switch (QuH) corresponding to the U-phase on or off reaches a high level; a phase adjustment determination unit (15) that determines whether phase adjustment of the U-phase coil current (Iu) is necessary on the basis of the phase difference (Δφ) between the target point (P) and the zero cross point (Q); and a drive control signal generation unit (16) that generates a drive control signal (Sd) on the basis of the determination result (S2) by the phase adjustment determination unit (15).

AOKI MASATO (JP)
KAIDU HIROYUKI (JP)
HAYASHI SYU (JP)
ASAMI TAKAHIRO (JP)

PCT/JP2023/019066

November 30, 2023

May 23, 2023

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MINEBEA MITSUMI INC (JP)

H02P6/14

JP2007174888A	2007-07-05
JP2015062329A	2015-04-02
JPH11155297A	1999-06-08

EINSEL Felix-Reinhard et al. (JP)

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