Bridgeless Totem-Pole Resonant Single-Power-Conversion PFC Converter

This study proposes a bridgeless totem-pole resonant single-power-conversion power factor correction (PFC) converter for aircraft mobilities, which require light weight and small volume for longer flight time. To achieve these requirements, the proposed PFC converter employs totem-pole and voltage doubler circuits on the primary and secondary sides, respectively. By adopting the totem-pole circuit, the diode bridge can be eliminated, thereby removing its conduction loss and reducing the number of active components. In addition, the totem-pole circuit has a smaller common-mode noise compared to conventional bridgeless PFC converters. Furthermore, both the resonant and clamping capacitances constitute the resonant tank along with the resonant inductance, which results in a reduction in the size of the clamping capacitors. The series-resonant operation provides a zero-voltage switching turn-
on
of the primary-side switches and a zero-current switching turn-
off
of all the secondary-side diodes, thereby reducing the switching losses of the active components. The proposed PFC converter can control the input current for a high PFC capability while regulating the output voltage. Hence, the proposed exhibits high power density, power quality, and power efficiency. And, the operating principles and design guideline of the proposed PFC converter are discussed in detail, and a 400-W prototype is developed and tested to verify the circuit functionality.