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Title:
MOTOR CONTROL DEVICE AND MOTOR CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2019/225144
Kind Code:
A1
Abstract:
The present invention proposes a technique for more properly measuring the viscosity of grease in a motor. The present invention is a motor control device for controlling a motor, the device having a first vibration attenuation time detecting unit that rotates a rotor of the motor as far as a first reference position by allowing the flow of current to the motor, and stops the rotor, and detects a first vibration attenuation time after the rotation of the rotor starts until the vibration of the rotor attenuates. The first vibration attenuation time has a strong correlation with the viscosity of grease.

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Inventors:
NAKAGAWA MAKOTO (JP)
AKITA MINORU (JP)
TANAKA TOMOYA (JP)
ISHIKAWA HITOSHI (JP)
YAMAUCHI HIROYUKI (JP)
Application Number:
PCT/JP2019/013170
Publication Date:
November 28, 2019
Filing Date:
March 27, 2019
Export Citation:
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Assignee:
AISAN IND (JP)
International Classes:
H02P6/21; H02P29/62
Domestic Patent References:
WO2013183551A12013-12-12
Foreign References:
JP2004007955A2004-01-08
JP2015162993A2015-09-07
JP2005269775A2005-09-29
JP2004056858A2004-02-19
JP2016019304A2016-02-01
JP2013115392A2013-06-10
Attorney, Agent or Firm:
KAI-U PATENT LAW FIRM (JP)
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