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 (JP)
KANEMARU MAKOTO (JP)
MORI MITSUGI (JP)
TSUKIMA MITSURU (JP)
KANEMARU MAKOTO (JP)
MORI MITSUGI (JP)
TSUKIMA MITSURU (JP)
Application Number:
PCT/JP2016/074685
Publication Date:
May 18, 2017
Filing Date:
August 24, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01R31/34; G01R31/06; H02P29/024
Domestic Patent References:
| WO2014156386A1 | 2014-10-02 | |||
| WO2005085792A1 | 2005-09-15 |
Foreign References:
| JP2012186973A | 2012-09-27 |
Other References:
See also references of EP 3376242A4
Attorney, Agent or Firm:
OIWA Masuo et al. (JP)
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