| 摘要 |
PROBLEM TO BE SOLVED: To attain more proper driving limit of an on-vehicle electric apparatus. SOLUTION: A correction factor k is set using a higher temperature of either of an estimated motor winding temperature Test estimated with a heat loss coefficient h based on a vehicle speed V or a motor temperature Tmot detected by a temperature sensor (S160). An initial value Tmax0 set as a maximum torque for a motor speed Nm from a rated value of a motor is multiplied by the correction factor k to set a motor torque limit Tmax (S170). Motor torque request is limited using the set motor torque limit Tmax to drive the motor. This enables driving limit of the motor 12 more properly. COPYRIGHT: (C)2006,JPO&NCIPI
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