Advanced DC-DC Converter Topologies to Boost the Voltage Gain for High Voltage Applications

Abstract

High-gain dc-dc converter is used in renewable energy systems, electric vehicles,power supply applications, etc. Presently, various types of dc to dc converters are invented, which have several advantages and drawbacks. Two advanced topologies of high-voltage dc-dc converters are proposed in this paper. In both topologies,the high-voltage gain comes true by cascading voltage multiplier cells. Both proposed converters have only one switch and inductor, which reduces the design complexity and cost. Both converters have less voltage stress, which increases their efficiency. The first proposed converter has more voltage gain than the second converter, and the overall voltage gain of both converters is much higher than the conventional dc-dc step-up converters. By taking 10 voltage multiplier cells and a 0.5 duty ratio, the output voltage of first converter is 960v for 12V input voltage, and for 0.25 duty ratio and the same number of voltage multiplier cells, the second converter output voltage is 480V for the same input voltage. To confirmand validate of the proposed converters, Matlab simulation software is used. The operating principle and the design considerations under continuous conduction mode are described.