Analysis and Implementation of a Bi-directional DC-DC Converter

Abstract

Here a bidirectional DC-DC converter has been presented and analysed. Bidirectional DC-DC converters are used for transferring the power, between any two DC sources in any forward or reverse direction. These type of converters are widely used in applications like HEV energy systems, fuel-cell hybrid power systems, UPS systems, Photo-voltaic hybrid power systems, and battery chargers. Different topologies of bidirectional dc-dc converters are studied for reference. The configuration of the adopted BDC is very easy to understand. In the adopted converter, a coupled inductor has been employed with same no. of winding turns at the primary and secondary sides. The design of the coupled inductor is done selecting the appropriate parameters of the core and the conductor. The hardware includes the driver circuit for MOSFET, power supply for it, power circuit and testing the results in the open loop system, by giving the PWM control pulses through the Arduino Uno R3 controller. The adopted converter has higher step-up and step-down voltage gains than the conventional bidirectional DC-DC boost/buck converter. The study of operating principle and steady-state analysis is done. The project work includes the study, design, open loop and closed loop simulation, analysis of the adopted converter, and finally implementation of the development of the system integration and testing the experimental results.