STUDY OF CONTROL OPTIONS FOR H-BRIDGE INVERTER SWITCHING IN SvPWM MODE WITH SINGLE-PHASE AC LOAD

Abstract

The paper studies the solution for implementing H-bridge inverter switching control in pulse width modulation mode according to space vector module (SvPWM) for the case of using single-phase AC loads. Based on voltage vector modulation strategies, the distribution of zero and non-zero voltage states will be implemented according to different rules. The results are surveyed, analyzed, compared and evaluated on the simulation model using Matlab-Simulink software. This study shows that, with the SvPWM pulse width modulation mode, it is possible to easily change the order of states of the H-bridge inverter, while generating output AC voltage pulses is more straightforward and intuitive than when using digital control methods. Analyzing the results indicates that with various voltage vector modulation strategies, increasing the number of modulated voltage vectors per half-cycle results in a reduction of total harmonic distortion and an increase in the fundamental harmonic index that needs modulation. Additionally, adjusting the modulation order rules for voltage vectors can generate different solutions for changing the distribution of zero and non-zero voltage states of the AC voltage pulse across the load, which allows for various improved modulation strategies aimed at enhancing the quality of AC voltage on the load.