Title:
電動機制御装置およびこれを備えた空気調和装置
Document Type and Number:
Japanese Patent JP7038906
Kind Code:
B2
Abstract:
A motor control device includes a power converter that supplies a three-phase voltage to two motors being connected in parallel, a three-phase power line that connects between one of the two motors and the power converter, a branch three-phase power line that connects between the other of the two motors and the power converter, a switching device having two switches that are provided on the branch three-phase power line, a current detection device that detects three-phase currents flowing in the two motors, and a controller. The controller performs a failure determination of the switching device by identifying a phase of a power line in which no current flows in the three-phase power line and the branch three-phase power line, and, when a failure is detected in one of the two switches in the failure determination, controls to change a state of the other switch, which operates normally, to coincide with a state of the failed switch.
Inventors:
Toshiki Asai
Akihiro Tsumura
Yasuhiko Wada
Junji Morimoto
Shigeo Takata
Akihiro Tsumura
Yasuhiko Wada
Junji Morimoto
Shigeo Takata
Application Number:
JP2021515351A
Publication Date:
March 18, 2022
Filing Date:
April 23, 2019
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02P29/024; H02P5/46; H02P27/06
Domestic Patent References:
| JP2008148415A | ||||
| JP5120041B2 | ||||
| JP5445741A | ||||
| JP6115594A |
Attorney, Agent or Firm:
Patent Business Corporation Kisa Patent Trademark Office