Harmonic Elimination Simulation of Seven Level Cascaded H-Bridge Inverter Based on Newton Raphson Method

Abstract

Multilevel inverters for high-power applications are arising as the new breed of power converter options. Usually, they combine the waveform of the staircase voltage (from many dc sources) that has reduced the harmonic content. The selective harmonic elimination (SHE) by using Newton-Raphson method is proposed to apply for 350 W infrared dyer system. The analysis covers the scope for multilevel inverter single-phase cascaded H-bridge (CHB). The proposed SHE scheme is run using MATLAB/Simulink simulation. The results of these simulation is then compared to a 36 V output inverter hardware. The proposed SHE effectively removes the lowest-order harmonics and delivers a higher quality output waveform with a better harmonic profile.

A Five-Level RF-PWM Method with Third and Fifth Harmonic Elimination for All-Digital Transmitters

“…A five-level MPWM method is proposed to improve the bandwidth of the filter [8] without cancelling the harmonics. To eliminate the harmonic components, the selective harmonic-elimination pulse-width modulator (SHE-PWM) [18][19][20] is proposed. The PWM waveform and harmonic components can be expressed by the Fourier series in the SHE-PWM method.…”