HIGH EFFICIENT LOADED RESONANT CONVERTER WITH FEEDBACK FOR DC DC ENERGY CONVERSION

Abstract

This seminar report presents a high efficient loaded resonant converter with feed back for DC-DC energy conversion applications. Energy shortages and increasing oil prices have created the demand for high energy conversion efficiency and per formance. Among the many advantages that resonant power conversion has over conventionally adopted pulse-width modulation include a low electromagnetic inter ference, low switching losses, small volume, and light weight of components due to a high switching frequency, high efficiency, and low reverse recovery losses in diodes owing to a low di/dt at switching instant. The proposed converter consists of a half bridge Inductor Capacitor Inductor resonant inverter and a load which is connected across the bridge rectifier. The output stage is filtered by a loss pass filter which is minimize the loading effect and ensure that the voltage across it is almost constant. The soft switching concepts used in this converter helps to reduce the switching losses , EMI and increase reliability and makes the circuit simple by reducing the size and weight of components. Furthermore, the proposed topology is highly promising for applications of power electronic productions such as switching power supplies, battery chargers, uninterruptible power systems, renewable energy generation systems, and telecom power supplies. MATLAB R2010a software is used to simulate the model. The feedback circuit provides accurate output with an energy conversion efficiency reaches up to 85.8 percentage and all the test results demonstrate a satisfactory performance