Multi-level inverter FED induction motor base on PLL technique control

Abstract

In this paper, the control of the output voltage in multi-level inverter is presented. The inverter is controlled by using pulse width modulation (PWM) technique. Its feedback is controlled with a Phase lock loop (PLL) compensator. The purpose is to improve output voltage and decrease total harmonic distortion (THD) of the inverter, based on Phase-lock technique and fed to induction motor with V/F control. Moreover, this method can be applied to increase the output of the inverter high precision in order to control methods of PLL.