Dual-Ćuk High Step-Up Bridgeless PFC Converters with Continuous Input and Output Currents

This paper proposes two novel types of dual-Ćuk bridgeless rectifiers for voltage conversion in power systems. These rectifiers overcome the limitations of conventional boost rectifiers and offer several significant advantages. The proposed rectifiers ensure high reliability by eliminating the shoot-through problem and feature low voltage stress across the semiconductors. They also provide continuous input and output current, making them suitable for grid-friendly applications. Additionally, the proposed rectifiers exhibit high step-up voltage conversion ratios, offering versatility for various power system applications. Specifically, Type-I rectifiers provide positive output voltage, while Type-II rectifiers yield negative output voltage. The proposed rectifier is experimentally validated for 110 Vac to ±200 Vdc at 500 W. The results demonstrate the effectiveness of the proposed rectifier.