抄録
In recent years, the harmonics and EMI noise sent out from an electric power conversion system are getting a great deal of attention in electromagnetic environment problems. The considerations of this problem have been getting important by recent significant improvement of auto-arc-suppressing device and switching speed. Therefore, there is need to do a detail frequency analysis such as transient phenomena. So, we have proposed the analytic technique using Wavelet-transform which is possible to catch a phenomenoni from the both sides of the time and the frequency. In this paper, we analysed the actual measured data in the switching interval by using Wavelet-transform. Then, based on obtained result, we describe the validity of Wavelet-transform and the application to the power electronics field.
