Title:
モータ温度推定装置およびモータ制御装置
Document Type and Number:
Japanese Patent JP4391719
Kind Code:
B2
Abstract:
A motor-current square value calculation section 45 calculates, as a motor-current square value, the sum of respective square values of two phase currents converted from three phase currents flowing through an electric motor. A temperature estimation calculation section 44 performs low-pass filtering for the motor-current square value, and calculates temperature increases of the mass portion and coils on the basis of the filtered motor-current square value. In the low-pass filtering, filtering calculation is performed in a manner which changes depending on rotational speed RV of the electric motor; i.e., whether the electric motor is in a rotating state or in a stopped state. The temperature increase of the mass portion is added to ambient temperature of the electric motor to thereby estimate temperature of the mass portion, and the temperature increase of the coils is added to the estimated temperature of the mass portion to thereby estimate temperature of the coils. Accordingly, the coil temperature of the electric motor can be accurately detected, and current flowing through the electric motor is properly controlled in accordance with the detected temperature.
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Inventors:
Shuji Fujita
Akio Sakai
Akio Sakai
Application Number:
JP2002078928A
Publication Date:
December 24, 2009
Filing Date:
March 20, 2002
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
JTEKT Corporation
JTEKT Corporation
International Classes:
B62D6/00; H02P6/06; H02P6/08; H02P6/12; H02P6/16; H02P6/17; H02P6/28; H02P21/00; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P21/28; H02P23/14; H02P27/04; H02P27/06; H02P27/08; B62D107/00; B62D137/00
Domestic Patent References:
| JP11289790A | ||||
| JP8133107A | ||||
| JP4071379A | ||||
| JP200213566A | ||||
| JP2001328551A |
Attorney, Agent or Firm:
Sakio Oba
Shinji Kato
Shinji Kato