Title:
AC ELECTRIC MOTOR MONITORING DEVICE AND MONITORING METHOD, AND ELECTRIC MOTOR DRIVE SYSTEM MONITORING DEVICE AND MONITORING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/049188
Kind Code:
A1
Abstract:
The present invention drastically reduces the amount of data by treating current flowing through an AC electric motor as a DC amount. The present invention also performs, in a monitoring device, edge processing for determining an abnormality by converting from AC to DC using a simple algorithm. This AC electric motor monitoring device monitors an AC electric motor driven using a drive power supply, and is characterized by converting a current detection value detected by a current detection means of the AC electric motor to a DC amount and outputting a feature amount on the basis of the DC amount.
Inventors:
IWAJI YOSHITAKA (JP)
ZHOU GUANGBIN (JP)
NAKAMURA AKIHIRO (JP)
TAKAHASHI AKESHI (JP)
ZHOU GUANGBIN (JP)
NAKAMURA AKIHIRO (JP)
TAKAHASHI AKESHI (JP)
Application Number:
PCT/JP2017/031886
Publication Date:
March 14, 2019
Filing Date:
September 05, 2017
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02P23/00; G01R31/34
Domestic Patent References:
| WO2010100998A1 | 2010-09-10 |
Foreign References:
| JP2010158089A | 2010-07-15 | |||
| JP2013121202A | 2013-06-17 | |||
| JP2011147317A | 2011-07-28 | |||
| JP2005049178A | 2005-02-24 | |||
| JP2007118680A | 2007-05-17 | |||
| JP2015001346A | 2015-01-05 | |||
| JP2016195524A | 2016-11-17 | |||
| JP2016197040A | 2016-11-24 |
Other References:
See also references of EP 3681035A4
Attorney, Agent or Firm:
TODA Yuji (JP)
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