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Title:
回転電機
Document Type and Number:
Japanese Patent JP6717731
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a rotary electric machine capable of improving an operation lifetime of the rotary electric machine and preventing non-planned stop by predicting occurrence of abnormal wear of a brush at an early stage.SOLUTION: A rotary electric machine comprises: a collector ring 1 that is a rotor; a brush 2 which includes a contact face 2a in contact with a surface of the collector ring 1 and an irradiation face 2b that is a face at a side opposite to the contact face 2a and electrifies the rotating collector ring 1 in contact with the collector ring; a first distance measuring device 6 which is provided at a position opposite to the irradiation face 2b of the brush 2 and measures a distance L to the brush 2; and a diagnosis device 7 which is connected to the first distance measuring device 6 and outputs an alarm if a change ΔL of the distance L from an initial value exceeds a predetermined first threshold K1 within a time of one or more cycles of rotations of the collector ring 1.SELECTED DRAWING: Figure 1

Inventors:
Kenji Yanagida
Keiji Suzuki
Application Number:
JP2016215129A
Publication Date:
July 01, 2020
Filing Date:
November 02, 2016
Export Citation:
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Assignee:
Mitsubishi Hitachi Power Systems, Ltd.
International Classes:
H02K13/00; H01R39/58
Domestic Patent References:
JP2013190248A
JP2002188908A
JP60152252A
JP2013090425A
JP2006071533A
JP2003102150A
Foreign References:
US20090266700
Attorney, Agent or Firm:
Polaire Patent Service Corporation