fair-rite扣式磁环0431176451 2643023002
维创域贸易有限公司苏州分公司长期供应fair-rite全系产品
磁环的匝数选择
将整束电缆穿过一个铁氧体磁环就构成了一个共模扼流圈，根据需要，也可以将电缆在磁环上面绕几匝。匝数越多，对频率较低的干扰抑制效果越好，而对频率较高的噪声抑制作用较弱。在实际工程中，要根据干扰电流的频率特点来调整磁环的匝数。通常当干扰信号的频带较宽时，可在电缆上套两个磁环，每个磁环绕不同的匝数，这样可以同时抑制高频干扰和低频干扰。从共模扼流圈作用的机理上看，其阻抗越大，对干扰抑制效果越明显。而共模扼流圈的阻抗来自共模电感lcm=jwlcm，从公式中不难看出，对于一定频率的噪声，磁环的电感越大越好。但实际情况并非如此，因为实际的磁环上还有寄生电容，它的存在方式是与电感并联。当遇到高频干扰信号时，电容的容抗较小，
将磁环的电感短路，从而使共模扼流圈失去
item brand mftrs no deion
1 fair rite 199000005 expanded cable and connector emi suppres
2 fair rite 199000017 emi supression evaluation kits
3 fair rite 199000018 product deion:fair-rite engineerin
4 fair rite 199000034 emi supression evaluation kits
5 fair rite 199001401 emi supression evaluation kits
6 fair rite 431164181 31 snap-it round cable suppression core
7 fair rite 431164281 ferrites impedance:310ohms; size/dimensi
8 fair rite 431164951 ferrite core impedance:280ohm; size/dime
9 fair rite 431167281 ferrites; impedance: 240ohms; size/dimen
10 fair rite 431173551 ferrites; impedance: 220ohms; size/dimen
11 fair rite 443163951 emi supression cores with cases
12 fair rite 443164151 round cable snap-its, cable diameter-.50
13 fair rite 443164251 ferrite round core ((nw))
14 fair rite 443167251 emi supression cores with cases
15 fair rite 443625006 emi supression cores with cases
16 fair rite 444164181 44 snap-it round cable suppression core
17 fair rite 444164281 44 snap-it round cable suppression core
18 fair rite 444164951 round cable core, emi suppression, with
19 fair rite 444167281 emi supression cores with cases
20 fair rite 444173551 ferrite core impedance:94ohm
21 fair rite 444176451 ferrite core impedance:175ohm
22 fair rite 2631102002 round cable emi suppression cores
23 fair rite 2631665702 ferrite core impedance:225ohm
24 fair rite 2643000101 ferrites; impedance: 40ohms; resistance:
25 fair rite 2643000801 shield bead, emi, 92 ohm impedance at 10
26 fair rite 2643000801 shield bead, emi, 92 ohm impedance at 10
27 fair rite 2643001501 ferrites resistance:35ohms
28 fair rite 2643021801 ferrite bead resistance:131ohm
29 fair rite 2643102002 static protection ((nw))
30 fair rite 2643102402 43 emi suppression bead
31 fair rite 2643164251 43 shield bead
32 fair rite 2643166651 flat cable emi suppression core, (hxwxd
33 fair rite 2643166851 flat cable emi suppression core, (hxwxd
34 fair rite 2643167851 43 flat cable emi suppression core
35 fair rite 2643169552 43 flat cable emi suppression core
36 fair rite 2643375002 emi shield beads
37 fair rite 2643480002 round cable emi suppression core, 1 in.
38 fair rite 2643540002 round cable emi suppression cores
39 fair rite 2643540402 43 round cable emi suppression core
40 fair rite 2643625002 ferrite, e c
5977001201
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