开关电源的有源功率因数校正电路设计  

Circuit Design of the Active Power Factor Corrector in the Switching Mode Power Supply

作　　者：李勇伟 孙筱琳[2] 王志海[2] 李国勇[2] 

机构地区：[1]浙江省交通规划设计研究院,浙江杭州310006 [2]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150040

出　　处：《电源技术应用》2007年第10期13-17,共5页Power Supply Technologles and Applications

摘　　要：分析了开关电源功率因数低的原因及对电网的影响,在此基础上,设计了一种有源功率因数校正电路。该电路采用了功率因数校正器件UC3854,经实验验证,该校正电路可使功率因数达到0.99以上,并把电源输入电流的波形失真减小到5%以下,减少了开关电源对电网的污染。详细介绍了所用IC芯片和电路设计要点。The reason of the low power factor in the switching mode power supply and the influence for the electrical network are analysed. On the base of it, an active power factor corrector circuit is designed. UC3854 is a new power factor corrector device in the circuit. The experimental results verify that the power factor can be increased above 0.99 and the input current distortion can be decreased 5%. The IC and the points of the circuit design are indroduced.

关 键 词：功率因数校正 UC3854 电路设计 

分 类 号：TN86[电子电信—信息与通信工程]