Design and Implementation of a Soft Switching Interleaved Inductor-Coupled Boost Converter with High Voltage Conversion Ratio

This study sought to develop a converter with a high voltage conversion ratio, low input current ripple, low switch cross voltage, and low withstand current rating that can be used as a power conditioner to enhance conversion efficiency and reduce circuit cost. By using coupled inductors and a voltage-doubled capacitor to achieve a boosting effect, the converter does not increase the withstand voltage of the switches and diodes when boosting the voltage gain. Additionally, the converter uses an interleaved trigger signal controlling method in its circuit. This design lowers the input current ripple and current rating. To further enhance the conversion efficiency of the proposed interleaved inductor-coupled boost converter with high voltage conversion ratio, the present study applied soft switching techniques in designing the converter. A resonant branch was created in the converter's circuit structure. When used in conjunction with the existing trigger signal controlling method, the resonant branch could establish zero-voltage switching and zero-current switching in the circuit's main switches, subsequently lowering the switching loss and ultimately enhancing the conversion efficiency. This paper presents the design and analysis of the circuit for the proposed soft switching converter along with experimental validation to verify the feasibility of the proposed converter.