多线圈变压器在多重电流型中的谐波消除法

提出了采用四线圈变压器和五线圈变压器分别作为三重化和四重化电流型逆变器的耦合变压器。从理论分析入手，建立了两种形式的输出电流数学模型，并导出了各线圈的最佳变比，从而达到了消除特定高次谐波的目的。说明了如何利用约束方程的关系，使变压器还同时起到了改变逆变器输出电压的作用。由于采用了一台多线圈变压器代替通常的多台变压器，可使耦合变压器的体积缩小，成本降低。特别适用于高压电机拖动系统。

Harmonic Eliminating Method for Multiple Current Mode with Multicircuit Transformer

It is proposed that the four-circuit transformer and five-circuit transformer are used as couplingtransformers of three-current mode and four-current mode inverters respectively. Through theoretical analysis,two mathematical models for current output are established. And optimum turn ratios for every pair ofwindings are derived too. Thus, the purpose of eliminating special high-order harmonics is attained. It isexplained that how to use the relationship of the restricted equations to. change the voltage output of theinverter by the transformer. Because of the adopting of a multicircuit transformer instead of severalconventional transformers, the volume and cost of the coupling transformer will be decreased. It is especiallysuitable for the driving systems of the high--voltage electric machines.