大功率电流型晶闸管变频器低频PWM换流过程分析

An Analysis of Low Frequency PWM Current CommutatingProcess of High Power Thysistor CSI

从换流原理、假设条件出发，对大功率电流型晶闸管变频器如何实现低频ＰＷＭ换流进行了较为详细地分析，提出了该变频应用于低频时应注意的问题，同时首次给出了此类变频器低频ＰＷＭ调制加二重化技术所产生的理论输出波形，可供工程实践中参考。

This paper analyses the low frequency PWM current commutating process of the high powerthysistor CSI in details based on the principle of current commutation and some hypothsis conditions.AlSo, the paper presentS the problem to be considered in using the inverter with low frequency, and atthe Same time, susgests the theoretical voltase waveforms of the inverter of the kind used in the technology of low frequency PWM and multiplicity for the reference in engineering practice for the fisrttime.