Fault Simulation and Analysis of Frequency Converter Based on PSIM and Matlab

The structure of frequency converter is presented. By use the software PSIM and Matlab the simulation of frequency converter is performed. During the simulation, the graphics are used to contrast and analyze the different roles played by normal faults and inductance filter in the simulation based on PSIM and Matlab. The mechanism causing frequency converter faults and how to reappear them by PSIM and Matlab are presented. Finally, the fault waveforms obtained from the simulation are processed by fast Fourier transform (FFT), and the differences among the faults simulated by different software are compared to explain the characteristics of waveforms of frequency converter faults and the method to judge faulty position by FFT waveform. The content of this research could be available for subsequent implementation of intelligent diagnosis of frequency converter faults.