Application on signal denoising using quasi real-time Wavelet algorithm in PMSM traction system

The signal of current sensor is one of key control parameters of PMSM vector control system. An arithmetic of quasi real-time Wavelet denoising with moving window, used in PMSM traction system, was proposed. The simulation results show that the arithmetic can effectively denoise the signals of current sensor with noise, achieve real-time requirement and enhance the stability of PMSM traction system. A quasi real-time Wavelet denoising module with DSP of PMSM traction system was proposed, whose effect was very obvious in the application of denoising the signal and making PMSM system more stable.