A SPWM Controlled Input in Dual Buck DC-DC Converter - Full Bridge for Single-Phase Five-Level Inverter

The inverter is very important to be implemented on a power plant system, the principal operation of inverter is a power conversion from DC to AC output. A five-level inverter produces a high-quality total harmonic distortion output side. This paper presents a single-phase five-level inverter using a sinusoidal pulse width modulation (SPWM) controlled in dual buck DC-DC converter and full bridge inverter. The proposed topology is a hybrid converter: dual buck DC-DC converters to generate SPWM voltage level with high frequency and full bridge inverter to generate polarity. This method is very effective to predict the high frequency power semiconductor in dual buck DC-DC converters. The other side the full bridge inverter just need a low frequency. By this method, the gating signals for power semiconductor switches are generated by employing simple pulse width modulation. The fist verification of this topology is by simulation using PSIM software. Finally, a microcontroller dsPIC30F4012 is used in laboratory experiment for the last verification.