Boost voltage single phase full bridge inverter with no voltage drop based on switched capacitor

Abstract

In this paper, a voltage‐boost‐type non‐voltage drop single‐phase full‐bridge inverter connected to a switched‐capacitor structure is proposed. The output voltage of the inverter is con-trolled by the pulse width modulation of a DSP to control the lead and break of the active switches. The full‐bridge switches work at low frequency; the other switches work at high frequency. The inverter uses two capacitor modules to charge and discharge alternately so as to overcome the problem of voltage drop on the output side of the inverter in the transition stage from series capacitor discharge to parallel charge. By analyzing the charge–discharge characteristics of the RC charge–discharge circuit, the capacitor charge–discharge cycle can be adjusted to alter the output voltage within a certain range. The results from the physical construction verify the Simulation results achieved well, which demonstrates satisfactory performance that supports the verification of the above theory.