一种电容解耦三相功率因素校正器

A three-phase power factor corrector decoupled by capacitors

提出了一种新型三相有源功率因素校正器,它由3个单相功率因素校正器模块组合而成,并用6个解耦电容去抑制3个单相功率因素校正器模块之间的相间耦合.从该三相功率因素校正器电路导出的一组解析公式表明:只要解耦电容的容量足够小相间耦合就足够小,只要每个单相功率因素校正器性能优越就能保证三相功率因素校正器性能优越.Matlab仿真显示:该三相功率因素校正器具有单位功率因素和连续的正弦输入电流,这一结果验证了理论分析的正确性.

A novel three-phase active power factor corrector （APFC） was proposed. The three-phase power factor corrector （PFC） consisted of three single-phase PFC modules and employed six decoupling capacitors to limit the phase coupling among the three single-phase PFC modules. The analytical expressions deduced from the three-phase PFC circuit indicate that the phase coupling is small if the magnitude of the decoupling capacitor is small. The performance of the three-phase PFC is excellent if the performance of every single-phase PFC module is excellent. Results simulated with Matlab show that the three-phase PFC has a unity power factor and continuous sinusoidal input currents. Therefore, the validity of the theoretical analysis is proven.