电流补偿扼流选型和应用(共模电感)

WÜRTHELEKTRONIKEISOSGMBH&CO.KG伍尔特电子有限公司(Eisos)2009CURRENTCOMPENSATEDCHOKESSELECTION&APPLICATIONS–电流补偿扼流选型和应用

Whycurrentcompensated?为何要电流补偿?

economic

advantages

more

expensive

thanSMDferrite

easytomakemoreturnover

经济优势

比贴片铁氧体价格高

更简单的制作工艺

technical

advantagesbetter

efficiency

high

current

with

highinductancevalueonlysolutionforsome

highspeedsignal(USB,CAN…..)

技术优势提高效率大电流和高感值唯一的一些高速信号解决方案例如：(USB,CAN…..)

current

compensatedchoke=commonmodechoke–WHY?电流补偿扼流=共模扼流–为什么呢?reductionofinterferencesoutwards

your

deviceinwards

your

device减少干扰外部设备内部设备result:„no“or

low

influencingofused

signal

highattenuationofinterferencesdifferentialmodecommonmode

EMV-Allgemein

GrundlagenFilter&SignaleEinfügedämpfungFiltertopologienSimulationWhy

current

compensated?为何要电流补偿?结果:没有或者对有用信号的干扰很小差模

阻止衰减共模CommonModeChoke共模滤波器f/MHzImpedanz/Ωnoise(common

mode)共模噪声used

signal

(differentialmode)有用信号

(差模differentialmodeimpedan差模阻抗commonmodeimpedance共模阻抗bestsolutiontofilter

noise

closetosignal

frequency最好的方案过滤噪声接近信号频率CommonModeChoke共模滤波器incomparisontosingle-choke相较于单扼流圈current

compensated

or

commonmodechoke电流补偿或者说共模线圈single

choke单扼流圈commonmodeimpedance共模阻抗High高lowtomedium低到中等differentialmodeimpedance差模阻抗Low低medium中等dependencyofimpedance

from

load

current阻抗依赖于负载电流Independent独立dependson„core“依靠，磁芯attenuationofused

signal有用信号的衰减Low低High高CommonModeChoke共模扼流圈Measurement测量f/MHzImpedanz阻抗/Ωdifferentialmodeimpedance差模阻抗commonmodeimpedance共模阻抗CommonModeChoke共模扼流圈differentdesigns不同的设计bifilar双绞线式sectional分段绕组LS~0,5…2%*LRLS~0,01…0,1%*LRCommonModeChoke共模扼流圈differentdesigns不同设计WE-SL2744226bifilar

winding双线绕组WE-SL2744226Ssectional

winding分段绕组CommonModeChoke共模扼流圈分段绕组Whendowe

offerasectional

winding?什么时候我们提供下面的共模线圈?Sectional分段绕组

only

solutiontoguarantee

distances

between

the

two

winding

accordingtoIEC60938orUL1283

max.voltage

application:250VAC/DChighleakage

inductor提供方案保证量绕组的距离，是依据IEC60938orUL1283

应用最大电压:250VAC/DC高漏电感power

supply:"high"voltageapplicationsignal:lowandhighspeedsignal电源:应用高压

信号:低高速信号CMchokeDMchoke

two

productsinone(preferred

for

power

supplies)

2合一产品(适用于电源)

max.voltage:printindatasheet

最大电压:参考数据表CommonModeChoke共模扼流圈data

signal

application应用在数据信号Bifilar双绞线low

leakage

inductor低漏电感power

supply:lowvoltageapplicationsignal:only

lowspeedsignal电源:应用于低压信号:仅应用于低速信号

lowvoltageapplication

(42VAC/80VDC)

lowvoltageapplication

(42VAC/80VDC)

应用于低压(42VAC/80VDC)CommonModeChoke–Mainadvantages共模扼流圈–主要优点WE-LFWE-CMBWE-FCWE-CMBNiZn

bigrangeof

sizestoXref

our

competitor大范围的尺寸代替我们竞争对手SVcaseis

very

competitive产品有很大竞争优势

high

current-upto35A大电流可达到35Aless

competitor

with

thispackage较少的竞争对手有这样的封装

high

leakageinductance

high

frequency

attenuation高频衰减high

current大电流WE-LF-SMD

dreamfordesigner

highVoltageSMD

high

leakageinductance

高漏感CommonModeChoke共模扼流圈WE-FC:Internationalsize(Europe,Asia,US)国际尺寸(欧洲，亚洲，美国)+highest

leakage

inductance+极大的漏电感+small

size+小尺寸+excellenthighfrequency

高频

+highvoltage

burst

performance+高压工作-only

for

small

currents

available-（紧应用于小电流）small

power

supplies小功率WE-CMB:WE-CMBNiZn:small

size

applications用于小尺寸highcurrent

applications用于大电流motor

driver马达驱动+special

size+特殊的尺寸+product

withhighnominalcurrent产品要求的高额定电流+very

small

size+很小的尺寸

+only

vertical

version仅有垂直型

+special

size

+high

frequency

attenuation

+attenuationofburst(IEC61000-4-4)+特殊尺寸+高频衰减+瞬间衰减(IEC61000-4-4)CommonModeChoke共模扼流圈WE-LF:Europeanstandard

component+Isolationtocomponents

around+Mechanical

protectionofthe

core+easytoplace欧标元件+绝缘+机械保护磁芯+易存放general

industrial

applicationspower

supplies一般用于工业电源WE-LFSMD:+special

size+Isolationtocomponents

around+mechanical

protectionofwinding

andcore+easytoplace+reflow

solderable+defined

solder

pad+特殊的尺寸+绝缘+机械保护磁芯和绕组+易存放+可过回流焊+规范的焊盘smallpowersupplies(lineundload

filter)lightingtechnologysmall

size

applications小功率电源(线与负载滤波)照明技术用于小尺寸CommonModeChoke共模扼流圈comparisondifferentpower

line

commonmodechokes比较不同功率的共模扼流圈0123456current[A]789101112WE-LF0,4mH47mH0,68mH47mH1,8mH47mH1,8mH27mHTypSTypMTypLTypXLWE-LF

SMD0,7mH47mHTypSWE-FC0,82mH33mHTypS14µH100µHTypMWE-CMBNiZnWE-CMB1mH39mH1mH20mH1mH20mH1mH20mH1mH20mHTypXSTypSTypMTypLTypXL0,5mH1,8mH14-35ATypXXLCommonModeChoke共模扼流圈comparison

commonmodechokesCMB–CMBNiZnCMB共模扼流圈的比较CMB–CMBNiZnCMBNiZnCMBCommonModeChoke共模扼流圈comparison

commonmodechokesCMB–LF–FC共模扼流圈比较CMB–LF–FCFC:Horizontal

FC:VerticalLF:27mHFC:22mH(Horrizontal)FC:22mH(Vertical)CMB:20mHWE-FChashigher

impedanceincommon&differentialmode

WE-FC在共模和差模形式有较高的阻抗CommonModeChoke–Overview共模扼流圈-概述Current

compensated

chokes@WürthElektronik电流补偿扼流圈@伍尔特电子für115/250VAC/max.35ASectional

winding传统绕线信号/数据线Umax.=80VDC/Iupto2,5ATHTWE-LFWE-CMBTHTSMTsectionalbifilarCommonmodeferrite

brigde6-hole-ferrite

bead共模铁氧体桥6-孔-铁氧体磁珠WE-SLseriesWE-CNSWWE-SLseriesWE-SLseriesWE-CNSWWE-FCWE-CMBNiZnSMTWE-LFSMD

COMPETITORS&APPLICATIONS竞争对手&应用CommonModeChoke共模扼流圈AskPMbefore

offering报价前询问PMcustomized

parts定制品CommonModeChoke共模扼流圈Whotomake

Xref?谁来制成Xref?easy

way

简单途径:IfnotinAlphaplan如果不在Alphaplan系统

checkthepackagingfirstandlooktheour

closerboxcheckthecurrentchecktheimpedanceorinductancevaluetakecareofthedifferentialmodeimpedance(bifilarorsectional

winding)checkthelayout先核对包装然后看我们接近核对电流核对阻抗和电感值考虑不同阻抗模式(双绞线or分段绕法)核对布线

STRG+SHIFT+WCommonModeChoke共模扼流圈differentdefinition

for

inductanceandcurrent电感和电流的不同定义

WE-FC&EPCOSB82731CommonModeChoke共模扼流圈differentdefinition

for

inductanceandcurrent电感和电流的不同定义

WE-FC&EPCOSB82731LminLN+50%L[mH]eiSosDéfinition0,80,911,11,21,30,71,41,51,61,7EpcosDéfinition-30%CommonModeChoke–Applications共模扼流圈的应用

fluorescent

lamps

low

voltagehalogenlamps

LED

荧光灯

低压卤素灯LEDCommonModeChoke–Applications共模扼流圈的应用Switchmodepower