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牵引变压器二次绕组因为变流器PWM斩波而含有大量高次谐波,这些谐波如果不加以抑制则不可避免会产生电磁噪声甚至产生电磁啸叫,这是变压器与变流器集成设计应该考虑的问题。文章以某型牵引系统为例,分析变压器电磁啸叫产生机理,并通过仿真分析提出变压器电磁啸叫抑制方法。
Traction transformer secondary windings contain a large number of higher harmonics due to PWM chopping of the converter. If these harmonics are not suppressed, electromagnetic noise and even electromagnetic whistling will inevitably occur, which is why the integrated design of the transformer and the converter should Consideration of the problem. Taking traction system of a certain type as an example, the paper analyzes the generation mechanism of transformer electromagnetic howling and puts forward the method of suppression of transformer electromagnetic howling by simulation analysis.