基于高頻電力線模型的整流器傳導(dǎo)干擾分析與驗(yàn)證
[Abstract]:Power transmission line is the main cause of voltage reflection in power electronic device or system and the limit value of electromagnetic compatibility can not be satisfied. In order to realize the estimation of electromagnetic interference in rectifier system, It is one of the key links to construct cable model which can accurately reflect electromagnetic transmission characteristics. At high frequency, the frequency change of parameters and the difference of distribution characteristics caused by skin effect have an effect on the current distribution density of conductors. At this time, the S.Kim model with lumped parameters can not accurately characterize the inherent characteristics of transmission lines. In order to accurately identify the parasitic parameters of the model in wide band, the equivalent circuit fitting strategy based on "N-Branch" theory is adopted to realize the accurate approximation and stable convergence of the prediction model. It provides an effective theoretical basis for the EMC design of power rectifier system. Finally, the feasibility and accuracy of the above modeling mechanism are verified by numerical calculation and experimental results. The measured results of conduction interference in low frequency band are almost consistent with the predicted results, but only about 5 dB estimation errors are produced in high frequency band. The forecast trend is basically consistent.
【作者單位】: 天津農(nóng)學(xué)院工程技術(shù)學(xué)院;北京新能源汽車(chē)股份有限公司;天津大學(xué)電氣與自動(dòng)化工程學(xué)院;
【基金】:國(guó)家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)(2013BAG01B00)~~
【分類(lèi)號(hào)】:TM461
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