Selective Harmonics Elimination technique in single phase unipolar H bridge inverter
Specific odd harmonics can be mitigated by operating the semiconductor switches in H bridge inverters at optimized switching angles of the PWM signals. These switching angles can be achieved by deriving a number of nonlinear equations using Selective Harmonic Elimination Pulse Width Modulation (SHE PWM) method. Modulation index (m) is a significant parameter used to control the amplitude of the fundamental output voltage of DC AC inverter. By changing the value of modulation index the Total Harmonics Distortion (THD) also will change. In this paper, the performance of single phase full bridge inverter using SHE PWM scheme with varying the modulation index is evaluated. In order to achieve a minimum THD, a different number of nonlinear equations are used to calculate the switching angles. The performance of a single phase unipolar inverter is simulated in Matlab.
2016 IEEE Student Conference on Research and Development (SCOReD)