摘要
设计了一种基于PWM控制芯片UC3846的恒压源,其适用于175~265 V宽电压的交流输入,额定输出电压为24 V,输出电流为2 A。采用单级三端PFC校正技术,提高系统的功率因数;采用有源嵌位软开关技术,降低开关应力,提高电源的输出效率。仿真和实物测试结果表明,本恒压源的输入功率因数可达到0.992;在额定负载下,整机效率可达到88%以上。
A constant voltage source based on PWM control chip UC3846 is designed, which applies to the 175~265 V AC input voltage, and the rated output voltage is 24 V and output current is 2 A. The single stage PFC-three terminal correction technique is used to enhance the power factor of the system;meanwhile,the active clamping-soft switch technology is used to reduce the switch stress and improve the output efficiency of the power. The simulation and physical test shows that the input power factor of the constant voltage source is 0.992 and the system efficiency reaches 88% under the rated load.
出处
《湖南工业大学学报》
2014年第2期52-55,共4页
Journal of Hunan University of Technology
基金
湖南省教育厅基金资助项目(13C023)
