Simulation of Extended Range Hybrid Type Full Bridge DC-DC Converter with Closed Loop Control

This paper presents a hybrid-type Z-Source fullbattery or external supply (sometimes higher or lower than the bridge dc/dc converter with high efficiency. Using a hybrid supply voltage).Additionally, the battery voltage declines as control scheme with a simple circuit structure, the proposed its stored energy is drained. Switched dc to dc converters offer dc/dc converter has a Z- Source impedance which will a method to increase voltage from a partially lowered battery extend the range of the full bridge converter. Under a voltage thereby saving space instead of using multiple normal input range, the proposed converter operates as a batteries to accomplish the same thing. phase-shift full-bridge series-resonant converter that Most dc to dc converter circuits also regulate the output provides high efficiency by applying soft switching on all voltage. Some exceptions include high-efficiency LED power switches and rectifier diodes and reducing conduction losses. sources, which are a kind of dc to dc converter that regulates When the input is lower than the normal input range, the the current through LEDs, and the simple charge pumps which converter operates as an active-clamp step-up converter that double or triple the output voltage. enhances an operation range. Due to the hybrid operation, Dc to Dc converters developed to maximize the energy harvest the proposed converter operates with larger phase-shift value for photovoltaic systems and for wind turbines are called than the conventional converters under the normal input power optimizers.Transformers used for voltage conversion at range. Thus, the proposed converter is capable of being mains frequencies of 50-60 Hz must be large and heavy for designed to give high power conversion efficiency and its powers exceeding a few watts. This makes them expensive, operation range is extended. A 1-kW prototype is and they are subject to energy losses in their windings and due implemented to confirm the theoretical analysis and validity to eddy currents in their cores. Dc-to-Dc techniques that use of the proposed converter. transformers or inductors work at much high frequencies, requiring only much smaller, lighter, and cheaper wound