低谐波高功率因数的AC－DC变换器设计

摘要

In order to reduce the electric power harmonic pollution, put forward a design of AC-DC converter suitable for middle and small power supply with high power factor. This design take the STM32F103 monolithic integrated circuit primarily controller, MOSFET rectiifer and Boost chopper APFC circuit as the core;The power factor correction special control chip UCC28019 produced by PWM waveform, through the closed loop feedback control for voltage output. The tests show that:when the input AC RMS is 24 V, the output DC current is 2 A, output voltage stabilizes in 36.03 V, the power supply of AC input power factor up to 99.5%, efifciency of 91.2%, it has good load and voltage regulation simultaneously.%为了降低电子电源的谐波污染，提出了一种适用于中小功率电源的高功率因数AC－DC变换器的设计。该设计以STM32F103单片机为主控制器，MOSFET全控整流和Boost斩波型APFC电路为核心；采用功率因数校正专用控制芯片UCC28019产生PWM波形，进行闭环反馈控制，实现稳压输出。测试表明：当输入交流有效值为24 V，输出直流电流为2A时，输出电压稳定在36.03 V，电源交流输入功率因数达到99.5%，效率达到91.2%，同时具有良好的负载调整率和电压调整率。