开关电源的高功率因数和软开关技术

High Power Factors of The Mains and Soft-switch Technology

分析了开关电源整流环节的谐波特征及软开关技术特点 ,提出一种高功率因数整流技术的实用方案 .该方案在 18信息移频电源屏的GT485 0开关电源中取得了预期的效果 .实践证明 ,高功率因数加上软开关技术是改善开关电源功率因数并提高效率的有效方法 .

This paper analyses the harmonic feature about the rectifying circuit of switching power supply and soft switch technology. A practical plan about high power factor rectifying technology is produced in this paper. This plan has been applied to GT4850 type switching power supply of 18 information shift frequency power supply pannel and get expectable purpose. It's proved that high power factor and soft switch technology is one sort of effective approach to improve power factor of switching power supply and increase its effieiency.