Title:
MOTOR CONTROL DEVICE FOR ELECTRIC AUTOMOBILE
Document Type and Number:
WIPO Patent Application WO/2013/073547
Kind Code:
A1
Abstract:
An inverter device (22) or an ECU (21) is provided with a magnetic force estimation means (38) that estimates the magnetic force of a permanent magnet of the rotor of a motor (6), a determination means (39) therefor, and a demagnetization-adapting timing-changing means (40). In accordance with a prescribed rule, the magnetic force estimation means (38) estimates the magnetic force on the basis of at least two signals detected from the rotational frequency of the motor, the motor voltage, and the motor current. The determination means (39) determines whether demagnetization has occurred. In response to a determination by the determination means (39) that demagnetization has occurred, the demagnetization-adapting timing-changing means (40) changes the timing at which the maximum current flows with respect to the rotor phase so as to increase the reluctance torque of the motor when the motor is driven by the inverter device (22).
Inventors:
OZAKI TAKAYOSHI (JP)
Application Number:
PCT/JP2012/079453
Publication Date:
May 23, 2013
Filing Date:
November 14, 2012
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
B60K7/00; B60L3/00; B60L9/18; B60L15/00; H02K7/10; H02K7/14; H02P6/06; H02P6/08; H02P6/12; H02P6/28
Domestic Patent References:
| WO2012114900A1 | 2012-08-30 |
Foreign References:
| JP2943657B2 | 1999-08-30 | |||
| JP2010268566A | 2010-11-25 | |||
| JPS5947994A | 1984-03-17 | |||
| JP2010110042A | 2010-05-13 | |||
| JP2008168790A | 2008-07-24 | |||
| JP2006258289A | 2006-09-28 | |||
| JP2004328819A | 2004-11-18 | |||
| JP2008168790A | 2008-07-24 |
Other References:
See also references of EP 2782241A4
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
Shuji Sugimoto (JP)
Shuji Sugimoto (JP)
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Claims: