New implementations of single-stage power-factor-correctors with voltage-doubler line rectifier

This paper deals with a new implementation of a voltage-doubler single-stage power factor corrector (VD-S²PFC). This new VD-S²PFC provides a reduction (by half) of the total voltage drop due to diodes conducting at the same time from the line input to the energy-storage capacitors. Moreover, the size of the additional inductors used to shape the tine current is dramatically reduced due to the fact that these inductors form part of an additional output of the main DC-to-DC converter, which is based on a full-wave rectifier and, therefore, these inductors are operating at twice the converter switching frequency and with a higher duty cycle than in the case of being based on a half-wave rectifier, as in some previous cases. The experimental results show that both inductors can be built into two E20 cores for a 100 W, 62 V_dc prototype. The voltage across the series connection of both energy-storage capacitors is lower than 500 V and the total efficiency of this prototype is 92-90%.