Numerical Modeling of Brushless Synchronous Generator for Rectifier Fault detection

Fault detection in electric machines can prevent the development of system faults and reduce the time and cost of repairs. Due to the fact that the most electrical energy in the world is produced by synchronous generators, it is more important to diagnose occurring faults in synchronous generators fast. Considering the ability of the numerical modeling method to analyze the performance of electric machines, in this paper, a brushless synchronous machine is firstly modeled to evaluate the one diode open-circuited fault on rotary rectifier with the 2D finite element method and the FFT of the terminal voltage is obtained. Finally, by using simulation and experimental results, the support vector machine has been used for classification applied to the FFT of voltages. The results indicate the ability of the proposed method to detect rotary diode faults in a brushless synchronous generator.