Title:
DEMAGNETIZATION DIAGNOSIS DEVICE FOR PERMANENT MAGNET SYNCHRONOUS MOTOR
Document Type and Number:
WIPO Patent Application WO/2014/118958
Kind Code:
A1
Abstract:
A demagnetization diagnosis device for a permanent magnet synchronous motor diagnoses the presence or absence of demagnetization by comparing the magnetic flux of a permanent magnet synchronous motor estimated by a suitable magnetic flux observer during no-load operation with a preliminarily set magnetic flux reference value on the basis of an AC voltage applied by a power convertor and a motor current detected by a current sensor. Thereby, it is possible to provide a demagnetization diagnosis device capable of reducing type of sensors required to just a current sensor without requiring a speed and position sensor, or a temperature sensor.
Inventors:
ADACHI SHOJI (JP)
Application Number:
PCT/JP2013/052270
Publication Date:
August 07, 2014
Filing Date:
January 31, 2013
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
ADACHI SHOJI (JP)
ADACHI SHOJI (JP)
International Classes:
H02P21/00; H02P27/04
Foreign References:
| JP2004159400A | 2004-06-03 | |||
| JP2000312498A | 2000-11-07 | |||
| JP2010088232A | 2010-04-15 |
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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