基于谐波注入法的高功率因数三相整流器

三相整流器广泛应用于各种电力电子设备，其谐波治理问题日益被人们所重视。谐波注入法是利用谐波电流注入整流器输入端，整形输入电流波形以减小电网污染的有效方法。该文提出了一种新型基于三次谐波注入法的高功率因数三相整流器，该整流器利用二极管的电流单向特性限制注入谐波电流的大小，采用电容分流的方式调节注入谐波电流与负载的比例关系，以获得最佳谐波抑制效果。电路结构简单，且谐波注入电路损耗小。文章分析了该整流器的工作原理、特性及参数设计方法，并通过仿真和实验表明该整流器具有很好的谐波抑制效果，选取合适参数能使整流器获得接近于1的功率因数。

Three-phase High Power Factor Rectifier Applying Harmonic Current Injection

With the widely usage of power electronic equipment, harmonic pollution of three phase rectifier has been paid more and more attention. Harmonic current injection technique is an effective method to suppress harmonics. A novel three-phase high power factor diode rectifier based on current injection is presented in this paper. The rectifier is simple in configuration and with less loss, which uses two diodes to limit third harmonic current and uses capacitors to allocate harmonic current for injection. The converter's operational principle, characteristics and design method are illustrated. Simulation and experimental results show the effectiveness of harmonic suppr- ession and power factor improvement of the proposed scheme.