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Abstract
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In this paper a novel buck-boost dc-dc converter with continuous input current is proposed. The voltage gain of presented converter is higher than conventional converters such as buck-boost, SEPIC, Cuk and Zeta converters. This converter works only by one switch and voltage stress across the switch is low. Input current of proposed converter is continuous so a large filter at the input is not needed. Furthermore, continuous input current have made this converter suitable for renewable energy and fuel cell applications. In this converter, non-inverting output voltage is obtained and also high gain of voltage is achieved. So it can operate at wide output voltage range only by changing the duty cycle of the power switch pulse. Presented converter can easily controlled in CCM mode operation, because of using only one power switch. In following, the principle of operation and the mathematical analyses of the proposed converter are explained, finally, validity of the proposed dc-dc converter is verified by the experimental results.
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