An arbitrary switching hybrid pulse width modulation strategy for three level inverters

This paper presents an arbitrary switching hybrid pulse width modulation (ASHPWM) strategy for three level inverters. This hybrid-modulation strategy represents an amalgamation of fundamental-frequency modulation and sinusoidal pulse width modulation (SPWM) strategy and is designed for performance of the well-known carrier based modulation strategies. The main characteristic of this modulation is the reduction of switching losses with good harmonic performance, balanced power loss dissipation among the devices in the H- bridge inverter. PWM and its digital controller for PWM circulation are implemented on a Xilinx Spartan 3E-500 FG320 processor. The feasibility of this hybrid modulation is verified through simulation and experimental results.