Performance evaluation of Inverter topology employing Controlled-Capacitor-Charging technique

Controlled-Capacitor-Charging (CCC) is a technique to synthesize a desired voltage profile at the output from the unregulated DC at the input. Earlier models of the Controlled-Capacitor-Charging type Inverters deals with the Single-Phase Inverter and the dynamic performance are not available. This paper deals with the performance of Capacitor-Charging-type Inverter. A simple technique to design the L-C elements of such an Inverter is introduced. The output voltage is forced to follow the corresponding reference waveform by a tracking controller. The switching devices are made to operate in the discontinuous conduction mode to reduce the size of the inductor and also for better dynamic performance. The Zero Current Switching (ZCS) at all turn-ON of the devices will thus automatically be achieved. The current through the inductor is used in the controller to operate the Inverter always in Discontinuous Conduction Mode (DCM). The Inverter can supply all types of load, including lagging, leading, and unity power factor. The proposed Inverter is very suitable for UPS applications, dynamic voltage restorers, induction heating, low-power drives, etc. The Inverter simulation is done in MATLAB.