This paper proposes a method of voltage control for three-phase multilevel H-bridge inverters with selective harmonic elimination (SHE) PWM The full-bridge configuration of H-bridge inverter cells enables voltage control with a fixed PWM pattern by me...
This paper proposes a method of voltage control for three-phase multilevel H-bridge inverters with selective harmonic elimination (SHE) PWM The full-bridge configuration of H-bridge inverter cells enables voltage control with a fixed PWM pattern by means of phase shifting between the legs, which greatly simplifies the control while maintaining the harmonic elimination characteristics The series combination of the cells in multilevel configuration can be exploited to further improve the bormonic elimination characteristics with proper phase shifting betwen the cell volitage A complexor-based control method is introduced to control the magnitude and phase angle of cell voltages that form three phase multilevel output voltages Simulation results show that the proposed method along with SHE PWM would provide satisfactory performance in spite of its simplicity.