整流电路换流重叠问题的一种分析方法

An Analyzing Method of Commutation Overlap Problem in Rectifying Circuit

本文以三相半波可控整流电路为例,推导了考虑变压器漏感时电流过渡波形的凹升函数及凸降函数。进而说明了电流过渡波形凹升凸降变化的原因,突出了换流重叠的物理概念,给出了一种简单易懂的换相压降及换流重叠角的公式推导方法,并将公式推广到其他各种整流电路。对电流过渡波形凹升凸降变化原因的分析及简单易懂的公式推导方法,有助于学生对换流重叠问题的理解和掌握。

The three phase half-wave controlled rectifying circuit is taken as the example in this paper to inllustrate the commutation overlap probelm.The concave rise and the convex fall functions are derived when considering the transformer leaking inductance,so the concave rise and the convex fall phenomena of the current transient waveforms is explained and analyzed.The physical concept of commutation overlap is emphasized,an easy and understandable formula derivation method for all kinds of rectifying circuit is given.The analysis to the the concave rise and the convex fall phenomena of the current transient waveforms and easy formula derivation method are helpful for the students to understand and grasp the commutation overlap problem.