摘要
采用无桥技术取代了传统功率因数开关校正(PFC)电路前端的整流桥,构建了一种新型的无桥Sepic-PFC电路。在开关开通过程中,输入电流仅流过一个二极管,有效地减小了导通过程中能量的消耗。电路工作在电流断续模态,减小了输入电路的电磁干扰,同时使得开关管软启动和二极管零电流关断,减小了开关管的导通损耗和二极管的反向恢复损耗。详细分析了电路的工作原理,并给出了公式推导,仿真和实验结果验证了理论的正确性。
Bases on the traditional basic Sepic power factor correction（PFC） a bridgeless Sepic-PFC circuit is pro-posed,which utilizes a bridgeless technology to elimainate the bridge rectifier in the circuit.The current only flows through one diode when the switch is on,it can effectively reduce the conduction loss.The circuit operates in DCM,it reduces the input circuit EMI and makes switch soft turn-on and the diode zero-current turn-off,while reducing the switch conduction loss and diode reverse-recovery loss.Operation principle and the formulas of the circuit are de-scribed,the correctness and practicability of this method are verified by Saber simulation and prototype experiments.
出处
《电力电子技术》
CSCD
北大核心
2011年第5期46-48,共3页
Power Electronics
关键词
功率因数校正
断续模式
无桥
power factor correction
discontinuous current mode
brigeless
