Abstract
Due to the effect of crosstalk coupling, switching power supplies with input lines and output lines closely show that high frequency conducted noises in both lines couple seriously, and it goes against electromagnetic interference (EMI) filter design. The switching power supply with input and output lines on the same side is investigated. Based on multiconductor transmission lines (MTLs) theory and weak-coupling crosstalk model, common mode (CM) noise current propagation paths are analyzed. In addition, the crosstalk model and per-unit-length parameters between input and output lines are presented. Simulation and experiment results indicate the change of output line conducted noise may influence the test result of input line. One improvement method is proposed responsibly to conducted emission.
| Original language | English |
|---|---|
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Diangong Jishu Xuebao/Transactions of China Electrotechnical Society |
| Volume | 25 |
| Issue number | 9 |
| State | Published - Sep 2010 |
Keywords
- CM noise
- Conducted emission
- EMI filter
- Multiconductor transmission lines
- Switching power supply
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