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PROPOSED BUCK-BOOST CONVERTER COMBING KY AND BUCK CONVERTER

Nikhitha C and Sheryl Grace Colaco
Department of Electrical and Electronics, St. Joseph Engineering College, Vamanjoor, India.

Abstract—This paper presents a Buck-Boost converter that combines KY converter and the traditional Synchronously Rectified (SR) buck converter with positive output voltage. The operation of these converters in Continuous Conduction Mode (CCM) result in a non-pulsating output current that reduces output voltage ripples. The analysis is presented as by considering the input voltage of the KY converter from the input voltage source during magnetization period, whereas during the demagnetization period, the input voltage of the KY converter is derived from the output voltage of the SR buck converter. The simulation results indicate smaller ripple voltage in output. Using controller we can reduce these ripples to achieve steady state. These combined converters have no right half plane zero.

Index Terms—CCM, KY converter, Buck-boost converter, SR buck converter, Right half plane zero

Cite: Nikhitha C and Sheryl Grace Colaco, "PROPOSED BUCK-BOOST CONVERTER COMBING KY AND BUCK CONVERTER," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 1, No. 1, pp. 133-140, March 2015.