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參數(shù)資料
| 型號： | B64290L44X830 |
| 英文描述： | CORE 12.5X7.5X5 N30 |
| 中文描述： | 共有n30核心12.5X7.5X5 |
| 文件頁數(shù)： | 3/21頁 |
| 文件大?。?/td> | 241K |
| 代理商： | B64290L44X830 |
Siemens Matsushita Components
589
Application: Ring cores to suppress line interference
With the ever-increasing use of electrical and electronic equipment, it becomes increasingly impor-
tant to be able to ensure that all facilities will operate simultaneously in the context of electromag-
netic compatibility (EMC) without interfering with each others’ respective functions. The EMC legis-
lation which came into force at the beginning of 1996 applies to all electrical and electronic products
marketed in the EU, both new and existing ones. So the latter may have to be modified so that they
are neither susceptible to electromagnetic interference, nor emit spurious radiation. Ferrite cores
are ideally suited for this purpose since they are able to suppress interference over a wide frequen-
cy range.
At frequencies above 1 MHz, ferrite rings slipped over a conductor lead to an increase in the imped-
ance of this conductor. The real component of this impedance absorbs the interference energy.
A ferrite material′s suitability for suppressing interference within a specific frequency spectrum de-
pends on its magnetic properties, which vary with frequency. Before the right material can be se-
lected, the impedance lZl must be known as a function of frequency.
The curve of impedance as a function of frequency is characterized by the sharp increase in loss at
resonance frequency.
Measurement results:
The measurements shown here were made at room temperature (25
±
3 C) using an HP 4191A
RF impedance analyzer with a flux density of B
≤
1 mT.
The maximum of the impedance curve shifts to lower frequencies as the number of turns increases;
this is due to the capacitive effect of the turns (figure 1, using R25/15 as an example).
Figure 1
For direct comparison of the typical suppression characteristics of differenct ferrite materials, the
impedance curves were normalized using the equation lZl
n
= lZl / N
2
x
Σ
(l
e
/ A
e
); the geometry
factor was calculated on the basis of the core dimensions (figure 2).
These normalized impedance curves are guide values, mostly measured using ring core R 10 with
a number of turns N = 1 (wire diameter 0,7 mm); they may vary slightly, depending on the geometry.
Ring Cores
General Information
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PDF描述 |
|---|---|
| B64290L45X830 | CORE 16X9.6X6.3 N30 |
| B64290L618X27 | CORE 25.3X14.8X10 N27 |
| B64290L674X830 | CORE 36X23X15 N30 |
| B64G-NNK-AD3-RMN | FILTER REGLER ENTLEER AUTOM 0.5ZOLL |
| B64G-NNK-MD3-RMN | ＂FILTER/REGULATOR MANUAL G1/2＂＂＂ |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| B64290L44X830 | 制造商:TDK-EPC 功能描述:FERRITE CORE TOROID N30 制造商:TDK-EPC 功能描述:RING CORE 12.5X7.5X5 N30 |
| B64290L44X87 | 功能描述:FERRITE CORE TOROID 1.12UH N87 制造商:epcos (tdk) 系列:B64290 零件狀態(tài):有效 內核類型:磁環(huán) 電感因數(shù)（Al）:1.12μH 容差:±25% 間隙:無缺口 有效磁導率 (μe):- 初始磁導率（μi）:2200 材料:N87 磁心因數(shù)（ΣI/A） mm-1:2.46 有效長度（e） mm:30.09 有效面積（Ae）mm2:12.23 最小磁心橫截面（Amin）?mm2:- 有效磁體體積（Ve） mm3:368 表面:環(huán)氧 供應商器件封裝:- 高度:5.95mm 長度:- 寬度:- 直徑:13.60mm 標準包裝:1,500 |
| B64290-L45 | 制造商:EPCOS 制造商全稱:EPCOS 功能描述:B64290 |
| B64290L45X1 | 制造商:TDK-EPC 功能描述:R16/9.6/6.3 K 1 制造商:TDK-EPC 功能描述:FERRITE CORES |
| B64290L45X27 | 制造商:TDK-EPC 功能描述:R 16/9,6/6,3 N27 RINGKERN 制造商:TDK-EPC 功能描述:FERRITE CORES |
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