PFC circuit with soft start function

• Main Authors: YANG YINPING, LU XUEJUN, WAN JINGLONG, XIANG WEIWEI
• Format: Patent
• Language: Chinese; English
• Published: 14.04.2020
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The utility model discloses a PFC (Power Factor Correction) circuit with a soft start function, which is characterized by comprising controllable rectifying devices BD1, BD2, BD3 and BD4, switching tubes S1 and S2; current limiting resistors R1 and R2; energy storage inductors L1 and L2; anti-reverse diodes D1 and D2; filter capacitors C1, C2; and a control unit. The circuit can effectively solvethe problem of large impact current at the power-on moment, has the characteristics of simple circuit structure and high reliability, and has a wide application prospect. 本实用新型公开了一种具有软启动功能的PFC电路，其特征在于，包括：可控整流器件BD1、BD2、BD3、BD4；开关管S1、S2；限流电阻R1、R2；储能电感L1、L2；防反二极管D1、D2；滤波电容C1、C2；以及控制单元。该电路可以有效解决上电瞬间冲击电流大的问题，同时具有电路结构简单、可靠性高的特点，应用前景广泛。