Patent ID: 8232752
Filing Date: 2012-07-31
Classification: B62D,G01R,H02M,H02P

Abstract:
1. An electric motor control apparatus, comprising: an inverter which comprises a plurality of switching elements, and drives an electric motor by operating the plurality of switching elements; a current detector disposed in the inverter; short-circuit point locating means for locating a short-circuit fault point; and motor rotation angle detecting means for detecting a rotation angle of the electric motor, and outputting a rotation angle detection value, wherein the short-circuit point locating means stores a test pattern indicative of a combination for turning on the switching elements, and locates the short-circuit fault point based on the test pattern, a current detection value detected by the current detector in response to the test pattern, and the rotation angle detection value, the short-circuit point locating means testing a first subset of the plurality of switching elements if an average motor voltage exceeds a threshold, and tests a second subset of the plurality of switching elements if the average motor voltage does not exceed the threshold.