| 摘要 |
PROBLEM TO BE SOLVED: To prevent a motor from being ferried around by a driven part due to the dragging of a wet type clutch and going into overspeed by energizing a rotor field coil to preheat the wet type clutch. SOLUTION: In cases where it is determined at Step S2 that the clutch temperature T is in a low temperature range lower than a preset temperature Th at which the motor is caused to go into overspeed, control is carried out at Step S4 so as to energize the rotor field coil to warm the clutch. As the result of this energization, the rotor field coil generates heat. This heat is transmitted to the wet type clutch through a motor drive system including the output shaft of the motor, and this warming is accelerated. This early lowers the viscosity of lubricating oil between clutch disks and also swiftly reduces the dragging of the clutch. As a result, the motor can be prevented from being ferried around and going into overspeed. COPYRIGHT: (C)2007,JPO&INPIT
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