Study on the modulation ratio of wavelet modulation technique

Abstract

This paper introduces the principle and implementation of the wavelet technique, and points out that the output voltage cannot be adjusted by using the original wavelet modulation (WM) technique. To solve this problem, this paper proposes a concept of modulation ratio for wavelet modulation, analyses the feasibility of wavelet modulation with modulation ratio theoretically. Finally, the experimental results show that the inverter using the modified WM technique has higher magnitude of the output fundamental along with lower total harmonic distortion by comparing with SPWM on the same modulation ratio.