10

Electric Implementation of Fault Diagnosis in Hybrid Vehicles Based on Reference Frame Theory

Bilal Akin Ph.D.

Texas Instruments

10.1 Introduction

The integrity of the electric motor in work and passenger vehicles can best be maintained by monitoring its condition frequently on-board the vehicle. This chapter presents a signal-processing-based fault diagnosis scheme for onboard fault diagnosis of rotor asymmetry at start-up and idle mode [9]. Regular rotor asymmetry tests are done when the motor is running at certain speeds under certain loads with stationary current signal assumption. It is quite challenging to obtain these regular test conditions for long enough time during daily vehicle operations. In addition, automobile vibrations ...

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