JELE_V1_N2_RP1 R. Uthirasamy J. Karpagam V. Srimaheswaran Journal on Electronics Engineering 2249 – 0760 1 2 5 15 Buck-Boost, Battery, Hybrid Vehicle, PWM Inverter This paper presents a new topology of Bidirectional Buck Boost Converter which produces a regulated DC output. This converter provides the steady state output using both buck and boost operation and produces an output voltage which is maintained constant with either higher or lower input voltage. The average output voltage of buck-boost converter depends upon duty cycle (D), frequency (f) and input voltage (Vs). The switching frequency is maintained at 1 kHz and the output is maintained constant at 230V DC. The main application of this project is in the working of hybrid electric vehicle. By implementing this circuit in the architecture of the hybrid electric vehicle the efficiency of operation of the vehicle is increased and the cost involved is reduced. The entire proposed circuit is designed and simulated by MATLAB\SIMULINK and verified with hardware results. December 2010 - February 2011 Copyright © 2011 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=1366