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Title:
MOTOR BEARING FAILURE DIAGNOSIS DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/078132
Kind Code:
A1
Abstract:
A motor bearing failure diagnosis device. When the device is in a failure diagnosis state, a current signal acquisition unit obtains a motor current real-time signal. A residual signal acquisition unit performs harmonic signal extraction on the motor current real-time signal obtained by the current signal acquisition unit, and base frequency and harmonic signals are eliminated from an original motor current real-time signal to obtain a residual signal. A failure feature extraction unit performs time-domain and frequency-domain analysis on the residual signal obtained by the residual signal acquisition unit so as to extract a bearing failure feature index. A failure diagnosis model unit uses a trained bearing failure diagnosis model to perform mode recognition on the bearing failure feature index extracted by the failure feature extraction unit, so as to diagnose a failure state of a bearing. The present invention can solve the technical problem that an existing motor bearing failure diagnosis device is difficult to effectively extract a failure feature signal from a low signal-to-noise-ratio current signal, and thus misinforming or informing omission is caused.

Inventors:
ZHU WENLONG (CN)
LIU YONG (CN)
DAI JISHENG (CN)
LI ZONGSHUAI (CN)
YANG JIAWEI (CN)
JIANG PING (CN)
ZHAN YANHAO (CN)
ZHANG ZHONGJING (CN)
XU HAILONG (CN)
Application Number:
PCT/CN2019/104202
Publication Date:
April 23, 2020
Filing Date:
September 03, 2019
Export Citation:
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Assignee:
ZHUZHOU CRRC TIMES ELECTRIC CO LTD (CN)
International Classes:
G01M13/04; G01R31/34
Foreign References:
CN109061474A2018-12-21
CN109238698A2019-01-18
CN106769041A2017-05-31
CN108303249A2018-07-20
CN105929331A2016-09-07
JP2015129523A2015-07-16
CN201811197298A2018-10-15
CN106769041A2017-05-31
CN106989923A2017-07-28
CN106680716A2017-05-17
Other References:
See also references of EP 3816604A4
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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