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參數(shù)資料
| 型號： | B64290L618X27 |
| 英文描述： | CORE 25.3X14.8X10 N27 |
| 中文描述： | 核心25.3X14.8X10 N27 |
| 文件頁數(shù)： | 3/21頁 |
| 文件大?。?/td> | 241K |
| 代理商： | B64290L618X27 |
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| B64290L618X27 | 制造商:TDK-EPC 功能描述:RING CORE 25.3X14.8X10 N27 |
| B64290L618X35 | 功能描述:EMI/RFI 抑制器及鐵氧體 TOROID 25.3X14.8X10 T35 RoHS:否 制造商:Fair-Rite 產(chǎn)品:Ferrite Cores 阻抗:365 Ohms 容差: 最大直流電流: 最大直流電阻: 工作溫度范圍:- 55 C to + 125 C 封裝 / 箱體: 端接類型:SMD/SMT |
| B64290L618X37 | 功能描述:EMI/RFI 抑制器及鐵氧體 TOROID 25.3X14.8X10 T37 RoHS:否 制造商:Fair-Rite 產(chǎn)品:Ferrite Cores 阻抗:365 Ohms 容差: 最大直流電流: 最大直流電阻: 工作溫度范圍:- 55 C to + 125 C 封裝 / 箱體: 端接類型:SMD/SMT |
| B64290L618X38 | 功能描述:EMI/RFI 抑制器及鐵氧體 TOROID 25.3X14.8X10 T38 RoHS:否 制造商:Fair-Rite 產(chǎn)品:Ferrite Cores 阻抗:365 Ohms 容差: 最大直流電流: 最大直流電阻: 工作溫度范圍:- 55 C to + 125 C 封裝 / 箱體: 端接類型:SMD/SMT |
| B64290L618X65 | 制造商:TDK EPCOS 功能描述:R 25,3/14,8/10 T65 SINGLE-APERTURE CORE |
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