Patent ID: 9559626
Date: 2017-01-31
CPC Classifications: B60L,H02P,Y02T

Claim:
1. A method for preventing overheating of a traction motor in an electric vehicle, the method comprising: identifying magnitude of an output load of the motor on the basis of an intensity of current flowing in the motor; identifying a loading time of the motor on the basis of the identified magnitude of the output load; comparing the loading time to a preset critical time corresponding to the identified magnitude of the output load; and controlling output torque of the motor according to the comparison result, wherein the controlling of the output torque of the motor comprises: determining whether the loading time exceeds the preset critical time reducing an output torque value of the motor according to the present load magnitude and a difference between the loading time and the critical time when the loading time exceeds the preset critical time; and resetting the output torque value on the basis of an intensity of current flowing in the motor that is driven according to the reduced output torque value.