湖南工业大学学报
湖南工業大學學報
호남공업대학학보
JOURNAL OF HUNAN UNIVERSITY OF TECHNOLOGY
2014年
2期
52-55
,共4页
UC3846%单级PFC%有源嵌位%软开关
UC3846%單級PFC%有源嵌位%軟開關
UC3846%단급PFC%유원감위%연개관
UC3846%single-stage PFC%active clamping%soft switch
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。
設計瞭一種基于PWM控製芯片UC3846的恆壓源，其適用于175~265 V寬電壓的交流輸入，額定輸齣電壓為24 V，輸齣電流為2 A。採用單級三耑PFC校正技術，提高繫統的功率因數；採用有源嵌位軟開關技術，降低開關應力，提高電源的輸齣效率。倣真和實物測試結果錶明，本恆壓源的輸入功率因數可達到0.992；在額定負載下，整機效率可達到88%以上。
설계료일충기우PWM공제심편UC3846적항압원，기괄용우175~265 V관전압적교류수입，액정수출전압위24 V，수출전류위2 A。채용단급삼단PFC교정기술，제고계통적공솔인수；채용유원감위연개관기술，강저개관응력，제고전원적수출효솔。방진화실물측시결과표명，본항압원적수입공솔인수가체도0.992；재액정부재하，정궤효솔가체도88%이상。
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.
