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Title:
ELECTRIC MOTOR DIAGNOSIS DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/081908
Kind Code:
A1
Abstract:
Provided is an electric motor diagnosis device capable of determining whether there is a winding short-circuit (layer short-circuit) even in an electric motor having a varying load. The electric motor diagnosis device calculates with a logical operation unit (20) a load torque using a voltage input through sampling from a voltage input unit (11) and a current input through sampling from a current input unit (12); determines a reverse-phase admittance from the obtained load torque using a normal load torque/reverse-phase admittance characteristic stored beforehand in a storage unit (30); calculates a winding short-circuit evaluation value using the determined reverse-phase admittance, a reverse-phase voltage, and a reverse-phase current; and uses a threshold to determine whether there is a winding short-circuit in an electric motor (7).

Inventors:
MIYAUCHI Toshihiko (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
KANEMARU Makoto (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
MORI Mitsugi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
TSUKIMA Mitsuru (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2016/074685
Publication Date:
May 18, 2017
Filing Date:
August 24, 2016
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
G01R31/34; G01R31/06; H02P29/024
Domestic Patent References:
WO2014156386A12014-10-02
WO2005085792A12005-09-15
Foreign References:
JP2012186973A2012-09-27
Other References:
See also references of EP 3376242A4
Attorney, Agent or Firm:
OIWA Masuo et al. (35-8, Minamimukonoso 3-chomeAmagasaki-sh, Hyogo 33, 〒6610033, JP)
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