Non-Isolated Enormous-Voltage-Boosting DC-DC Converter for High Step-up Application

Abstract

This work introduces a ‘non-isolated enormous-voltage-boosting DC-DC converter’. The proposed converter combines a three winding coupled inductor and voltage extension circuit. This converter provides large step-up voltage conversion ratio with reasonable duty cycle, great utilization of leakage energy, elimination of high voltage spikes on the switch. Due to such superiority, allowing utilization of low resistance $\mathbf{R}_{\mathbf{D}\mathbf{S}(\mathbf{o}\mathbf{n})}$ MOSFET switch. The operating principle and steady state analysis of continuous conduction mode (CCM) are discussed in detail. The MATLAB simulation results for 20V/400V, 250W non-isolated enormous-voltage boosting DC-DC converter are provided to verify the virtue of the proposed converter.