变频励磁激振激发源的分析研究

The Analysis of Stimulator for Testing Oscillating Characteristic of T-G Sthaft With Varying Fiekd Frequency

本文就汽轮发电机组轴系固有扭频与振型实测用变频励磁激振激发源─—三相全控整流桥触发角α按正弦规律变化时，整流电压对应交变分量中基波频率与幅值的确定及其同激振频率之关系进行了分析与研究．所得结论可为变频励磁激振的实际应用提供依据．

This paper analyses the relationship between the exciting oscillating frequency and thefundame ntal frequency ir the aIternating component of the rectified voltage if the firing delay angle(a)of a six-pulse bridge converter varies with sinusoidal form,the converter is used as a stimulator tocarry out the field testing of inherent oscillating frequency of a large T-G shaft.The obtainedconclusion offers a theoretical basis for testing inherent oscillating frequency of a large T-G shaft bystimulated oscillation method using varying field frequency.