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Title:
MOTOR CONTROL DEVICE, MOTOR SYSTEM, AND MOTOR CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2021/200389
Kind Code:
A1
Abstract:
This motor control device comprises: an observer which estimates a γ-axis induced voltage and a δ-axis induced voltage when the rotor of a motor is idling; a derivation unit which derives the phase difference between the dq axis and the γδ axis, from the γ-axis induced voltage and the δ-axis induced voltage; and an estimation unit which estimates the idling state of the rotor from the phase difference. For example, the estimation unit estimates the idling speed of the rotor, from the period of the phase difference. For example, the estimation unit estimates the magnetic pole position when the rotor is idling, from the phase difference, the sign of the γ-axis induced voltage, and the sign of the δ-axis induced voltage.

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Inventors:
YAMASAKI REIJI (JP)
KIMURA TOSHIKI (JP)
Application Number:
PCT/JP2021/011927
Publication Date:
October 07, 2021
Filing Date:
March 23, 2021
Export Citation:
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Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
H02P21/14; H02P23/12
Foreign References:
JP2018170928A2018-11-01
JP2020014266A2020-01-23
JP2018204878A2018-12-27
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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