Study Of ZVS Bidirectional DC-DC Converter

Md Zaidon, Muhammad Zharif (2015) Study Of ZVS Bidirectional DC-DC Converter. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Study Of ZVS Bidirectional DC-DC Converter.pdf - Submitted Version Download (407kB)

Abstract

Power electronics converters are equipment that implemented with switching devices which turn on and off while the power will be converted from one form to another. It operates with high switching frequencies in order to reduce size of the converters transformers, capacitors and inductors. However, in high switching frequencies operation, it increases the amount of power that is lost due to switching losses. Thus, it will reduces the power converter efficiency. These switching losses are caused by the overlap of switch current and switch voltage during a switching transition. If voltage across or the current flowing through switch is zero during a switching transition, then there is no overlap of switch voltage and switch current, therefore, no switching losses occurs. Zero Voltage Switching (ZVS) is one of the techniques to reduce the problem. This also referred as soft switching techniques in the power electronics. The development of high power isolated bidirectional DC-DC converters with the half bridge topology has become an urgent topic because of the requirements of the hybrid vehicle applications and battery based energy storage systems. This half bridge has an advantages of simple circuit with no total device rating (TDR) penalty, simple control with high efficiency, and it is a soft switching implementation without additional devices compared to the traditional bidirectional DC-DC converters for the similar applications.

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