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电磁干扰(EMI)是铁道车辆牵引回路中电子电源方面无法避免的问题。由于很难减少来自各种设备和电缆中的电磁干扰,故将普通异步电动机电缆更换为屏蔽电缆,并研究其对降低辐射的影响。结果表明:电缆两端头屏蔽后,在100 kHZ点干扰降低了10 dB。屏蔽电缆能有效降低牵引回路辐射,特别适用于不宜采用其他方法降低电磁干扰时,诸如跨接电缆或电动机引出线等。
Electromagnetic interference (EMI) is a problem that can not be avoided in the electronic power supply of railway vehicle traction circuit. Since it is difficult to reduce the electromagnetic interference from various equipment and cables, a normal asynchronous motor cable is replaced with a shielded cable and its effect on radiation reduction is studied. The results show that the interference at the 100 kHZ point is reduced by 10 dB after the cable ends are shielded. Shielded cable can effectively reduce the traction circuit radiation, especially suitable for other methods should not be used to reduce electromagnetic interference, such as jumper cables or motor leads and so on.