| 引用本文: | 孙振,耿克强,由建,祝盼江.提高电源滤波器插入损耗措施的研究[J].电力自动化设备,2007,27(1):71-73 |
| .Research on measures to increase insertion loss of power line filter[J].Electric Power Automation Equipment,2007,27(1):71-73 |
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| 摘要: |
| 针对电源滤波器插入损耗受端接负载的影响,在使用时很难匹配负载,导致插入损耗和标准给出的性能相差很大。为提高滤波性能,对电源滤波器端接负载情况下的共模和差模等效电路进行分析,提出了利用并联电容或串联电感等补偿元件提高插入损耗的措施,依据戴维南定理给出了连接补偿元件后的近似等效电路。通过分析和实验验证了并联电容阻抗是负载阻抗的1/N或串联电感是负载阻抗的N倍时,插入损耗将提高N倍估算方法的正确性。 |
| 关键词: 插入损耗,共模电感,差模电容 |
| DOI： |
| 分类号:TN713 |
| 基金项目: |
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| Research on measures to increase insertion loss of power line filter |
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SUN Zhen GENG Ke-qiang YOU Jian ZHU Pan-jiang
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| Abstract: |
| As the insertion loss of power line filter is affected by terminal impedance,it is difficult to match,which causes great difference from the insertion loss stipulated in standard.To improve its filtering performance,the common and differential mode equivalent circuits of power line filter with terminal impedance are analyzed,and measures to increase insertion loss with parallel capacitor or serial inductor are provided.The approximate equivalent circuit with connected compensation component according to Thevenin theorem is put forward.Analysis and experiments validate that the insertion loss is improved by N times when the impedance of parallel capacitor is 1 / N of load impedance or the impedance of serial inductor is N times of load impedance. |
| Key words: insertion loss,common mode inductor,differential mode capacitor |
