Feed forward controlled dual buck full-bridge inverter

Abstract

An inverter is a power electronic device that is used for high voltage and high power application because of its characteristics of synthesizing a sinusoidal voltage using a DC source. The inverter is modified from a dual buck inverter, and it retains the advantage of no reverse recovery of body diode. The DC voltage utilization rate can be increased by adopting the voltage commutation-bridge instead of the voltage-dividing capacitors in the inverter. Comparing with other dual buck inverters, this inverter has only one filter inductor, which reduces the volume and weight of the system observably and improve the integration. In the controlling method a combination of high and low frequency modulation is adopted to reduce the complexity of control and to improve the reliability and stability of the system. A feed forward loop is also incorporated into the system to make the output voltage constant irrespective of input voltage variation. The simulation of feed forward controlled dual buck full-bridge inverter is done using MATLAB/Simulink software. Arduino is used for generating control pulses for the switches and for implementing feed forward controlling loop.