Novel High Step-Up DC-DC Converter with Coupled-Inductor and Switched-Capacitor Technique for Sustainable Energy System
نویسندگان
چکیده
In this paper, a novel high step-up DC-DC converter is proposed for sustainable energy system. The proposed converter uses coupled inductor and switched-capacitor technique. The capacitors are charged in parallel and are discharged in series by the coupled-inductor to achieve high stepup voltage gain with appropriate duty ratio. Besides, the voltage stress on the main switch are reduced with a passive clamp circuit, low ON-state resistance RDS(ON) of the main switch can be adopted to reduce the conduction loss. In addition, the reverse-recovery problem of the diode is alleviated by coupled inductor. Thus, the efficiency can be further improved. The operating principle and steady-state analyses of voltage gain are discussed in detail. Finally, a prototype circuit with 24-V input voltage, 400-V output voltage, and 200-W output power is implemented in the laboratory to verify the performance of the proposed converter. Index Terms – High step-up voltage gain, sustainable energy system, coupled inductor, switched capacitor
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