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A novel equivalent circuit model of the surge wave generator

This paper proposes a novel circuit model of the 1.2/50-8/20μs combination wave generator (surge wave generator). The novel model solves the problem that the 1.2/50–8/20μs combination wave generator in IEC 61000-4-5 standard cannot produce the negative open-circuit voltage waveform. By formula derivation and calculation, it is proved that the standard model is unable to produce negative voltage waveform while the novel model can. Meanwhile, the waveform curve produced by the novel circuit model can be adjusted in larger range. Also, it can be quicker to adjust compared with the standard model. Furthermore, the novel model can modeling the actual surge more accurately.