Development and testing of wavelet modulation for three-phase three-level inverter

Abstract

This paper presents the development and implementation of a wavelet modulation (WM) technique for the three-phase three-level voltage source inverter. The WM technique is based on constructing a nondyadic-type multiresolution analysis (MRA), which supports sampling continuous time sinusoidal signals in a nonuniform recurrent manner, then reconstructing it using inverter switching actions. The simulated and experimental performances of the three-phase three-level inverter, which is realized by the WM technique, are investigated. To compare the performances of WM technique, those of PWM and SVPWM techniques are obtained. The results show that the high magnitude of fundamental components and significantly reduced harmonic contents of the inverter outputs can be achieved by using WM in the three-phase three-level inverters and it can be easily realized.