Single Phase, Full Bridge, Controlled Capacitor Charging (CCC) Type Inverter

Controlled capacitor charging (CCC) is a new technique to synthesize sinusoidal voltage at the output from the unregulated DC at the input. The method is based on controlled charging/discharging of a capacitor to realize the desired voltage waveform. A capacitor (C) that is connected across the load is charged/discharged through an inductor (L) by applying high frequency pulses. Applied pulses could be of either positive or negative polarity depending on the error signal in the controller. The controller senses the output-voltage and the current through the inductor (L) to maintain Zero Current Switching (ZCS) at every turn-on, while keeping the output-voltage close to the reference waveform by a hysteresis algorithm. This paper presents the performance of the single-phase, full-bridge CCC Inverter. A simple procedure to design such inverter is also discussed. The proposed controller is simulated in PSPICE. Supporting results from experimental prototype confirm the usefulness of the proposed Inverter.