Title:
SIGN DETERMINATION DEVICE, SIGN DETERMINATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/256359
Kind Code:
A1
Abstract:
This sign determination device comprises: a measurement result acquisition unit which acquires a measurement result of a current flowing through an electric motor; a parameter acquisition unit which performs a frequency analysis on the measurement result and acquires a plurality of evaluation parameters; a first specification unit which specifies, for each of the plurality of evaluation parameters, a value corresponding to one evaluation parameter included in the plurality of evaluation parameters; a second specification unit which specifies a maximum value among the specified values corresponding to the plurality of evaluation parameters; and a determination unit which compares the specified maximum value with a preset threshold to determine whether there is an abnormal sign of the electric motor.
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Inventors:
MORISHITA YASUSHI (JP)
SONODA TAKASHI (JP)
TSUYUKI KAZUHIRO (JP)
NAGAFUCHI NAOYUKI (JP)
SONODA TAKASHI (JP)
TSUYUKI KAZUHIRO (JP)
NAGAFUCHI NAOYUKI (JP)
Application Number:
PCT/JP2021/022044
Publication Date:
December 23, 2021
Filing Date:
June 10, 2021
Export Citation:
Assignee:
MITSUBISHI POWER LTD (JP)
International Classes:
G01M99/00; G01R31/34
Domestic Patent References:
| WO2018109993A1 | 2018-06-21 |
Foreign References:
| JP2017181283A | 2017-10-05 | |||
| JP2018128284A | 2018-08-16 | |||
| JP5985099B1 | 2016-09-06 | |||
| US20130013138A1 | 2013-01-10 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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