New Method to Model the Equivalent Circuit of the Pulse Generator in Electrical Fast Transient/Burst Test

Xiaoshe ZHAI  Yingsan GENG  Jianhua WANG  Zhengxiang SONG  Degui CHEN  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E92-C   No.8   pp.1052-1057
Publication Date: 2009/08/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E92.C.1052
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (IS-EMD2008))
Category: Actuators & Pulse Generators
Keyword: 
electrical fast transient/burst (EFT/B),  equivalent circuit,  analytical expression,  network synthesis,  

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Summary: 
This paper presents an accurate and systematic method to model the equivalent circuit of pulse generator in the electrical fast transients/burst test (EFT/B). Firstly, a new analytical expression is presented to express the generator's charging and discharging process under open-condition (1000-Ω), which all its coefficients are determined according to the output waveform specified by the manufacturer. And then, with adoption of the step source, the transfer function of the pulse forming network in Laplace domain is deduced, which is ready for the network synthesis. Based on above discussion, the parameterized method and the technique of constant-resistance are adopted for the network synthesis. Finally, the equivalent circuit is renormalized and improved to meet the specification under matching-condition (50-Ω). In this way, the equivalent circuit of EFT/B generator is obtained and can be adjusted conveniently to satisfy the different manufacturers. The PSPICE simulation with a certain load is validated by measurement.