新型数字锁相环单相功率因数校正电路

Research of new power factor correction circuit with digital phase-locked loop

功率因数(PF)不仅体现了电网功率传输是否充分利用,也反映了该电器设备的输入电流的谐波含量。论述了一种基于数字锁相环的单相功率因数电路,首先建立了电路的小信号模型及补偿设计,通过改进传统算法加入了数字锁相环,并设计了巴特沃斯数字滤波及基于Delta-Sigma分辨率提升的方法。最后通过仿真和实验验证了该方法的可行性。

The power factor （ PF） was the reflection of the power transmission. The harmonic content of input current from the electrical equipments was reflected. A single-phase power factor circuit with smal signal model was discussed and compensation was designed. The traditional algorithm was improved by adding a digital phase-locked loop. And a new method of the Butterworth digital filter and Delta-Sigma arithmetic was presented. Finally, the feasibility of the method was validated through simulation and experimental.