Proposed calculation of H-bridge switching law in speed con-trol of the single-phase asynchronous motor in PWM mode

Abstract

This article proposes a calculation plan to control H-bridge inverter switching based on changing the law of distribution of non-zero voltage states according to the power law ratio, 0 voltage states according to the division law. uniformity in speed control of a single-phase asynchronous motor in H-bridge inverter switching pulse width modulation. The results are surveyed, analyzed, compared and evaluated using simulation models on software. Matlab-Simulink. In particular, the fundamental harmonic level index and the total amount of higher harmonics (THD) are used to compare, analyze and evaluate the quality of H-bridge inverter output voltages in different switching modes, simultaneously. Meanwhile, evaluate the influence of the zero and non-zero voltage distribution rules of the proposed plan with the SinPWM pulse width modulation technique on the speed oscillation and the speed value set at the voltage frequencies. AC pulse H-bridge inverter output with different average voltage levels and pulse hashing frequencies.