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Patent Searching and Data


Title:
COIL TEMPERATURE ESTIMATION METHOD AND MOTOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/022722
Kind Code:
A1
Abstract:
A coil temperature estimation unit (12) estimates the coil temperature of a motor (1) on the basis of the previously given coil equivalent resistance, thermal capacity, and thermal resistance of the motor (1), the voltage applied to the motor (1), which is detected by a voltage detection circuit (17), and an externally input duty-ratio command value. When a temperature abnormality determination unit (13) determines that the coil temperature is not normal, a duty restriction unit (14) restricts the duty-ratio command value to a lower value, after which the duty-ratio command value is output to an FET drive circuit (15).

Inventors:
IKITAKE YOSHITAKA (JP)
FUJITA YOUICHI (JP)
KAWAMURA SATOSHI (JP)
Application Number:
PCT/JP2013/071803
Publication Date:
February 19, 2015
Filing Date:
August 12, 2013
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P29/00
Foreign References:
JPH04347594A1992-12-02
JP2010068662A2010-03-25
JP2007228775A2007-09-06
Attorney, Agent or Firm:
TAZAWA, Hideaki et al. (JP)
Hideaki Tazawa (JP)
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