变频空调中功率因数校正的控制电路设计

APFC Control Circuit Design of Inverter Air-Conditioner

利用双闭环控制原理设计了较大功率交流/直流变频空调的一种有源功率因数校正(APFC)方案.实验结果表明,前级功率因数校正(PFC)环节输出电压纹波大大降低,输入电流交越失真大为改善,满足了"3C认证"中电磁兼容(EMC)认证要求,最后给出了部分实验结果.

An active power factor control (APFC) scheme for high power AC and DC inverter air conditioner is implemented with BOOST CCM averaged current mode control. Its voltage loop and current loop control circuit is designed. Experimental results prove that the output ripple voltage is substantially reduced and the input current crossover distortion restrained so that the EMC conditions stipulated in 'China Compulsory Certification' can be met. Finally, experimental waveforms are given.