Performance Evaluation of CCC Inverter Topology Employing Average Current-mode Control Technique

Abstract

Controlled-Capacitor-Charging (CCC) is a technique to synthesize a desired voltage profile at the output from the unregulated DC at the input. This research paper deals with the dynamic performance of Controlled-capacitor-charging type inverter. A novel method to design the L-C elements of such an inverter is proposed. The output voltage is forced to follow the corresponding reference waveform by a tracking Average Current-mode controller. The switching devices are made to operate in the discontinuous conduction mode to reduce the size of the inductor and also for producing the better dynamic performance. The Zero current switching (ZCS) at all turn-ON of the devices could be achieved automatically. The current through the inductor is used in the controller to operate the inverter always in Discontinuous conduction mode (DCM). The CCC inverter can supply all types of load, including lagging, leading, and unity power factor. The proposed inverter is extremely suitable for UPS applications, Dynamic voltage restorers, Induction heating, Low-power drives etc which require pure sine wave for its efficient operation. The proposed inverter simulations have been performed using MATLAB-Simulink environment and results obtained are reported.