Title:
FAILURE DIAGNOSIS DEVICE, LEARNING DEVICE, LEARNING METHOD, AND FAILURE DIAGNOSIS SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/079796
Kind Code:
A1
Abstract:
This failure diagnosis device (1000) comprises: a control unit (100) for controlling the drive of an electric motor (53); an abrasion estimation unit (200) for estimating an abrasion amount of the bearing of the electric motor (53) on the basis of current flowing through the electric motor (53); and a failure notification unit (300) for diagnosing a failure of the electric motor (53) on the basis of the abrasion amount of the bearing of the electric motor (53) estimated by the abrasion estimation unit (200) and notifying the user. When estimating the abrasion amount of the bearing of the electric motor (53) by the abrasion estimation unit (200), the control unit (100) controls the drive of the electric motor (53) so that the electric motor (53) performs a constant drive.
Inventors:
WADA YASUHIKO (JP)
SAKANOBE KAZUNORI (JP)
SAKANOBE KAZUNORI (JP)
Application Number:
PCT/JP2020/038607
Publication Date:
April 21, 2022
Filing Date:
October 13, 2020
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P29/024; H02P21/14; H02P27/06
Domestic Patent References:
| WO2019049188A1 | 2019-03-14 | |||
| WO2019003389A1 | 2019-01-03 |
Foreign References:
| JP2020038313A | 2020-03-12 | |||
| US4907105A | 1990-03-06 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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