Patent ID: 8701803
Filing Date: 2014-04-22
Classification: B60K,B60L,G01R,Y02T

Abstract:
1. A diagnostic apparatus to diagnose a drive motor used in an electric vehicle that is driven by the motor, comprising: a start-up abnormality detection section to detect a coil temperature of a motor coil and a coil resistance or an insulation resistance of the motor coil during a non-traveling time, in which an electric power supply of a vehicle is applied, and then to determine an occurrence of an abnormality in the motor coil in the event that the coil temperature is greater than a threshold value or the coil resistance or the insulation resistance is greater than a threshold value; and a travel abnormality detection section to detect the coil temperature, a rotation number of the motor, a motor applied voltage and a motor current during a traveling of the vehicle and then to determine an occurrence of the abnormality in the motor coil in the event that the coil temperature is greater than a threshold value, or a relation between the motor applied voltage and the motor current relative to the rotation numbers of the motor fails to fall within a predetermined range.