两级交错CRM单相功率因数校正器

摘要

为提高功率等级和系统效率,充分降低磁件尺寸和缩小成本,单相交流电源供电的变频空调和充电机等用电设备的前级AC/DC功率电路需采用多级交错和临界导电模式(CRM)的单相有源功率因数校正(APFC)技术.在对CRM APFC一些基本问题进行分析后,采用模拟控制器FAN9611实现和测试分析了两级交错CRMAPFC样件,支持输出功率6.5 kW,效率高达98.4％,仿真结果与实测结果验证了CRM APFC的可行性.%In order to improve the power level and system efficiency,the size of the magnetic components and costs are fully reduced,the former AC/DC power circuits of inverter air conditioner,charger and other electrical equipment with single-phase AC power supply require single-phase active power factor correction (APFC) technology employing multi-channel interleaved and critical conduction mode(CRM).Based on the analysis of some basic problems of CRM APFC,the two-channel interleaved CRM APFC samples are implemented and tested by simulation controller FAN9611.The output power is 6.5 kW and the efficiency is up to 98.4％.The simulation results and the measured results verify the feasibility of CRM APFC.