考慮漏磁特性的變壓器電磁干擾特性模型
發(fā)布時間:2018-09-17 17:33
【摘要】:變壓器是隔離型功率變換器電磁干擾(EMI)噪聲傳輸?shù)年P(guān)鍵器件。針對先期建立的變壓器三電容容性EMI噪聲特性模型在評估小匝比變壓器及高頻噪聲時誤差增大的現(xiàn)象,首先分析高頻下變壓器漏磁對噪聲電壓分布的影響,然后補充變壓器二次側(cè)耦合噪聲對電磁噪聲的影響情況,對比總結(jié)不同匝比結(jié)構(gòu)對變壓器噪聲影響因素,在此基礎(chǔ)上提出考慮漏磁特性的變壓器EMI特性模型。通過能反映變壓器二端口特性的參數(shù)測量評估方法進行實驗評估,實驗和仿真結(jié)果驗證了理論分析和模型的正確性。
[Abstract]:Transformer is the key device of electromagnetic interference (EMI) noise transmission in isolated power converter. In view of the phenomenon that the error increases in the pre-established three-capacitive EMI noise model for small turn ratio transformers and high frequency noise, the influence of transformer magnetic flux leakage on the noise voltage distribution is analyzed at first. Secondly, the influence of secondary coupling noise on electromagnetic noise is supplemented, and the influence factors of different turn ratio structure on transformer noise are compared and summarized. On this basis, a transformer EMI characteristic model considering magnetic leakage characteristics is proposed. The experimental results show that the theoretical analysis and the model are correct.
【作者單位】: 福州大學(xué)電氣工程與自動化學(xué)院;
【基金】:福建省自然科學(xué)基金項目資助(2014J01178)
【分類號】:TM41
[Abstract]:Transformer is the key device of electromagnetic interference (EMI) noise transmission in isolated power converter. In view of the phenomenon that the error increases in the pre-established three-capacitive EMI noise model for small turn ratio transformers and high frequency noise, the influence of transformer magnetic flux leakage on the noise voltage distribution is analyzed at first. Secondly, the influence of secondary coupling noise on electromagnetic noise is supplemented, and the influence factors of different turn ratio structure on transformer noise are compared and summarized. On this basis, a transformer EMI characteristic model considering magnetic leakage characteristics is proposed. The experimental results show that the theoretical analysis and the model are correct.
【作者單位】: 福州大學(xué)電氣工程與自動化學(xué)院;
【基金】:福建省自然科學(xué)基金項目資助(2014J01178)
【分類號】:TM41
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