Title:
MOTOR CONTROL DEVICE, MOTOR CONTROL SYSTEM, AND MOTOR CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2022/163066
Kind Code:
A1
Abstract:
Provide is a motor control device capable of stabilizing the rotation of a motor even when an encoder pulse temporarily varies upward. This motor control device comprises a position signal counter (41); a periodic signal generation unit (42); and a speed determination unit (43) which determines a rotational speed of the motor calculated on the basis of a count number of the position signal counter (41) as the rotational speed of the motor when the count number is a predetermined value or more and which determines, as the rotational speed of the motor, a lower speed of the rotational speed of the motor determined on the basis of the position signal counter and a speed upper limit value when the counting has not been performed by the position signal counter (41). The speed determination unit (43) determines the speed upper limit value so that the rotational speed of the motor to be determined decreases in accordance with the number of times that a low-count period in which the counting has not been performed by the position signal counter (41) successively occurs during the predetermined period.
Inventors:
ARAKAWA YOHEI (JP)
Application Number:
PCT/JP2021/041470
Publication Date:
August 04, 2022
Filing Date:
November 11, 2021
Export Citation:
Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
H02P23/14
Foreign References:
| JP2008187770A | 2008-08-14 | |||
| JP2014226024A | 2014-12-04 | |||
| JP2019115094A | 2019-07-11 |
Attorney, Agent or Firm:
EINSEL Felix-Reinhard et al. (JP)
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