SINGLE SWITCH HIGH GAIN ISOLATED DC-DC CONVERTER WITH ACTIVE CLAMP

Abstract

In this paper, an isolated high gain single switch dc-dc converter is proposed. In the proposed converter, high step-up voltage is obtained by single power switching technique that operates appropriate duty cycle with isolated transformer inductors, switched capacitor and power diodes. It alleviates the conventional converters high duty ratio and high voltage stress on power devices. The proposed converter eliminates the switching losses by the method of series resonance soft switching with an active clamp. To achieve high output voltage gain, the isolated transformer primary and secondary terminals are connected in series during switching operation. The proposed scheme experimented with solar cell characteristic. PSIM software has been used for simulation. The operation is verified by simulation and validated by implementing in the hardware model at 40Vdc/400Vdc, 100kHz, 500Watts.