关于耦合电感电路的教学研究

Teaching Research on Coupling Inductance Circuit

从同名端的定义出发,理清了耦合电感电路的概念、给出了判断互感电压极性的简单方法。采用戴维宁定理,推导确定了空心变压器的去耦等效电路;同时给出了空心变压器的二端口等效电路及参数,指出在等效过程中无须考虑同名端和互感电压极性的问题。由理想变压器的等效电路模型,推导确定了实际铁心变压器的等效电路,进一步说明铁心变压器不能变换直流的原因。文章最后给出了全耦合变压器的等效电路。

This paper begins with the definition of dot,makes the concept of coupling circuit clearly,gives the simple method of how to decide the polarity of mutual voltage.Based on Thevenin’s theorem,the decoupling equivalent circuit of the hollow transformer is deduced and determined,and the two port equivalent circuit and parameters of the hollow transformer are given.It is pointed out that the problems of homonymous terminal and mutual inductance voltage polarity need not be considered in the equi valence process.Based on the equivalent circuit model of the ideal transformer,the equivalent circuit of the actual core transformer is deduced and determined,which further explains the reason why the core transformer can not convert DC.Finally,the equivalent circuit of the perfect coupling transformer is given.