Non-Isolated High-Gain DC-DC Converter Using Charge Pump and Coupling Inductor

摘要: As generally acknowledged, the high-gain DC-DC converter is widely used in sustainable energy system as front-stage of DC-AC converter. Therefore, it indispensable for low voltage to be boosted high voltage. In general, boost or buck-boost such applications. However, not easy converters achieve ratio. theory, ratios these two can reach infinity, but actuality about three four, limited by parasitic component effect and controller capability. Consequently, if ratio desired over five, then two-stage based on utilized, different topologies [1-18] are created. [1-10], Luo its derivatives presented, whose lift technique similar that Cuk SEPIC converter, transfer from one inductor via intermediate capacitor other inductor. transferred mainly determined capacitance, thus causing current stress serious. [11][12], voltage-boosting with very also uses a an energy-transferring medium, behavior hence [13], specified input voltage, output rated being 24V, 200V 2A, respectively, presented. Such combines characteristics bootstrap scheme boosting. The higher is, more number bootstraps diodes capacitors. surge occurs large value too corresponding equivalent series resistance (ESR) relatively large. [14], has 1/(12D) continuous conduction mode (CCM), where D duty cycle main switch. And compared this complicated due four switches required. [15], KY maximum only two. [16-18], coupled-boost which coupling medium. [18], 1+nD/(1-D). suppressing spike created leakage inductance taken into account