M级交错N重开关并联移相驱动的单相功率因数校正器

Single-phase Power Factor Corrector with Phase-shifted Driving M-phase Inter-leaved N-Paralleled Switches

对于单相交流电源供电的大功率家用变频空调、通讯电源等用电设备,需要采用大功率单相功率因数校正器,如多级交错APFC或在单级APFC中采取多个功率器件并联。本文提出和理论分析了一种M级交错、N重开关并联且所有功率器件移相驱动的APFC(MxNAPFC),分析了其电路结构和工作原理,包括电压变比、纹波电流、驱动方法和控制方式。该MxN APFC变换器能够在传输大功率的同时,可以降低功率器件的开关频率,简化功率器件的选型,同时保持升压电感的工作频率不变,或保持功率器件的开关频率不变,成倍提高升压电感的工作频率,简化电感设计。本文以2x2 APFC为例,进行了MATLAB/SIMULINK仿真分析,并进行了实验研究,获得了非常满意的效果,验证了所提整体方案的正确性。

For high-power home inverter air conditioners and other electrical equipment which are supplied by single-phase AC power source, single-phase power factor correction is needed. For example, multi-level interleaved APFC or single-level APFC with multiple power devices in parallel. This paper proposes a new single-phase M level and N power devices in parallel PFC which is driven by shift phase control method. Then the paper analysis its circuit structure and working principle, including voltage transformation ratio, ripple current, driving method and control methods. This MxN APFC can transmit high power and reduce the switching frequency of the power devices. This circuit structure simplifies the selection of power devices. Meanwhile, it can also maintain the operating frequency of the boost inductor unchanged or maintain the switching frequency of the power device constant. This control method improves the operating frequency of the boost inductor several times and simplifies the inductor design. Then this method is simulated and analyzed by MATLAB/SIMULINK The result verifies that this control method is workable.