通用型高功率因数高频开关电源的开发

本文主要针对国内高频电源市场发展的现状,对电源的小型化设计、分布式模块化设计、功率因子改善和高次谐波抑制等问题进行了探讨,介绍的是一种通用型高功率因数高频开关电源产品的开发.设计中变换器采用推挽-正激DC-DC变换器拓扑形式,控制芯片的设计主要包括PFC、PWM两个环节的电路设计及相关外部电路的构建.整个系统采用模块化设计,各模块间的均流采用最大电流法自动均流技术实现.设计的各项指标在试验中均达到预期要求,进一步完善后即可投入市场使用.

Development of General High-frequency Power Supply System with High PFC

As far as it is concerned with the recent situation of the developments of the domestic markets of power supply system, the miniaturization design and the distribution module design have been put forward in this article. And the problem of PFC and high- harmonic restraint have been put forward, too. In this article, the development of a product of the high frequency switching power supply for common use is introduced. The push-forward DC-DC converter is put to use in this design. With the PWM/PFC control-chip,all the relevant external circuits have been designed rationally. As the modular design method is used in this system, a max-current-control self-Current-Sharing method has been used to make good control of the current of each module. All the performances of the system have met the proposed requirements during experiments, and this design can be put into use soon after some further improvement.