維創(chuàng)域貿(mào)易有限公司蘇州分公司李先生18036385331qq1565361784長期供應(yīng)fair-rite全系產(chǎn)品
磁環(huán)的匝數(shù)選擇
將整束電纜穿過一個鐵氧體磁環(huán)就構(gòu)成了一個共模扼流圈，根據(jù)需要，也可以將電纜在磁環(huán)上面繞幾匝。匝數(shù)越多，對頻率較低的干擾抑制效果越好，而對頻率較高的噪聲抑制作用較弱。在實際工程中，要根據(jù)干擾電流的頻率特點來調(diào)整磁環(huán)的匝數(shù)。通常當干擾信號的頻帶較寬時，可在電纜上套兩個磁環(huán)，每個磁環(huán)繞不同的匝數(shù)，這樣可以同時抑制高頻干擾和低頻干擾。從共模扼流圈作用的機理上看，其阻抗越大，對干擾抑制效果越明顯。而共模扼流圈的阻抗來自共模電感l(wèi)cm=jwlcm，從公式中不難看出，對于一定頻率的噪聲，磁環(huán)的電感越大越好。但實際情況并非如此，因為實
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
2743021447
2675023002
2675023002
2512067007y3
2744044447
2643101902
2643806402
2643800502
4033129021
5943003801
9477375002
4033129021
431164951
2508053017y3
5975000321
2673021801
9477015002
2512063017y0
2743019447
2673004901
2843000202
9877000204
0j41808ec
pc50 pq2625g-12
pc44pq26/25z-12txm
9877000104
4033122011
2773037447
2675102002
5977001201
0443167251
0443164151
5977001421
2743002111
2643023002
431167281
431176451
475176451
2631626202
2508052027y1
2643540002
2631625102
432703055471
433003055471
2743019447
2506036007y3
2508056017y2
2506036007y3
2508056017y2
2643625202
2743019447
2744555577
2773019447
2773021447
2861002302
2873002302
2508053007y0
2508056007y3
2512065007y3
2512066017y1
