因此首先对串联型有源电力滤波器进行了稳态分析，建立了系统的等效电路。然后，根据等效电路提出了一套基于稳态分析的功率电路设计方法。
The steady state analysis of SAPF is presented and its equivalent circuit is given, based on which a set of design method for power circuit of SAPF is brought out.
针对旋转型耦合器，建立了耦合器等效电路模型，指出耦合器可等效为漏感与励磁电感串联。
The paper set up the equivalent circuit model of the rotary type coupler, and analysed that the coupler can be simplified to a magnetizing inductance and a leakage inductance in series.
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