Lower Side Switching Modification of SHEPWM for Single H-Bridge Unipolar Inverter

Malaysian Technical Universities Conference on Engineering and Technology 2017

Aihsan, M.Z.^1

University Malaysia Perlis, Malaysia^1

关键词: Cascaded multi-level inverters;    Fundamental component;    Fundamental frequencies;    H-bridge inverters;    Output voltages;    Selective harmonic elimination;    Switching scheme;    Total Harmonic Distortion (THD);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/318/1/012037/pdf
DOI  :  10.1088/1757-899X/318/1/012037

来源: IOP

【 摘 要 】

Selective Harmonic Elimination Pulse Width Modulation (SHEPWM) is a famous fundamental frequency method for both single stage H-bridge inverter and cascaded multilevel inverters. The main function of SHEPWM is to eliminate the selective lower order of odd harmonic such 3rd, 5th7thand 9thof the output voltage of the inverter but maintain the fundamental component. In this paper, the 5kHz of the unipolar SHEPWM switching scheme of the inverter is developed and later will be compared to the modified SHEPWM switching scheme. The performance of this inverter is measured through the final total harmonic distortion (THD), the efficiency of the whole system and the natural shape of the output after LC filter.