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1、,WRTH ELEKTRONIK EISOS GMBH & CO. KG 伍尔特电子有限公司(Eisos),2009,CURRENT COMPENSATED CHOKES SELECTION & APPLICATIONS 电流补偿扼流选型和应用,Why current compensated?为何要电流补偿 ?,economic advantages more expensive than SMD ferrite easy to make more turnover 经济优势 比贴片铁氧体价格高 更简单的制作工艺 technical advantages better efficiency h
2、igh current with high inductance value only solution for some high speed signal (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 compensated choke = common mode choke WHY? 电流补偿扼流 = 共模扼流 为什么呢?,reduction of interferences outwards your device inwards your device 减少干扰 外部设备 内部设备,result: n
3、o“ or low influencing of used signal high attenuation of interferences, differential mode, common mode,EMV-Allgemein Grundlagen Filter&Signale Einfgedmpfung Filtertopologien Simulation,Why 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,Common Mode Choke 共模滤波器,f/MHz,Impedanz / ,noise (co
4、mmon mode) 共模噪声,used signal (differential mode) 有用信号 (差模,differential mode impedan 差模阻抗,common mode impedance共模阻抗,best solution to filter noise close to signal frequency 最好的方案过滤噪声接近信号频率,Common Mode Choke 共模滤波器,in comparison to single-choke相较于单扼流圈,Common Mode Choke共模扼流圈,Measurement测量,f/MHz,Impedanz阻抗
5、/ ,differential mode impedance 差模阻抗,common mode impedance 共模阻抗,Common Mode Choke共模扼流圈,different designs不同的设计,bifilar双绞线式,sectional分段绕组,LS 0,5 2% * LR,LS 0,01 0,1 % * LR,Common Mode Choke共模扼流圈,different designs 不同设计,WE-SL2 744226 bifilar winding双线绕组,WE-SL2 744226S sectional winding分段绕组,Common Mode Ch
6、oke共模扼流圈分段绕组,When do we offer a sectional winding ?什么时候我们提供下面的共模线圈?,Sectional分段绕组,only solution to guarantee distances between the two winding according to IEC60938 or UL1283 max. voltage application : 250 VAC / DC high leakage inductor 提供方案保证量绕组的距离，是依据IEC60938 or UL1283 应用最大电压 : 250 VAC / DC 高漏电感,p
7、ower supply : “high“ voltage application signal : low and high speed signal 电源 : 应用高压 信号 : 低高速信号,CM choke,DM choke,two products in one (preferred for power supplies) 2合一产品 (适用于电源),max. voltage : print in data sheet 最大电压 : 参考数据表,Common Mode Choke共模扼流圈,data signal application应用在数据信号,Bifilar双绞线,low lea
8、kage inductor 低漏电感,power supply : low voltage application signal : only low speed signal 电源 : 应用于低压 信号 : 仅应用于低速信号,low voltage application (42 VAC / 80V DC),low voltage application (42 VAC / 80V DC) 应用于低压 (42 VAC / 80V DC),Common Mode Choke Main advantages共模扼流圈 主要优点,WE-LF,WE-CMB,WE-FC,WE-CMB NiZn,big
9、 range of sizes to Xref our competitor 大范围的尺寸代替我们竞争对手 SV case is very competitive产品有很大竞争优势,high current - up to 35A大电流 可达到 35A less competitor with this package较少的竞争对手有这样的封装,high leakage inductance,high frequency attenuation高频衰减 high current大电流,WE-LF-SMD,dream for designer high Voltage SMD,high leak
10、age inductance 高漏感,Common Mode Choke共模扼流圈,WE-FC :,International size (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 + excellent high frequency 高频 + high voltage burst performance+ 高压工作 - only for small currents available - （紧应用于小电流）,small power supplies 小功率,
11、WE-CMB:,WE-CMB NiZn:,small size applications用于小尺寸 high current applications用于大电流 motor driver马达驱动,+ special size+ 特殊的尺寸 + product with high nominal current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 + attenuation of burst ( IEC 61000-
12、4-4),+ 特殊尺寸 + 高频衰减 + 瞬间衰减 ( IEC 61000-4-4),Common Mode Choke共模扼流圈,WE-LF :,European standard component + Isolation to components around + Mechanical protection of the core + easy to place 欧标元件 + 绝缘 + 机械保护磁芯 + 易存放,general industrial applications power supplies 一般用于工业 电源,WE-LF SMD:,+ special size + Iso
13、lation to components around + mechanical protection of winding and core + easy to place + 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,small power supplies (line und load filter) lighting technology small size applications 小功率电源 (线与负载滤波) 照明技术 用于小尺寸,Common Mode
14、 Choke共模扼流圈,comparison different power line common mode chokes 比较不同功率的共模扼流圈,0,1,2,3,4,5,6,current A,7,8,9,10,11,12,Common Mode Choke共模扼流圈,comparison common mode chokes CMB CMB NiZn CMB共模扼流圈的比较CMB CMB NiZn,CMB NiZn,CMB,Common Mode Choke共模扼流圈,comparison common mode chokes CMB LF FC共模扼流圈比较CMB LF FC,FC
15、:Horizontal,FC:Vertical,LF : 27mH FC :22mH (Horrizontal) FC:22mH ( Vertical) CMB:20mH, WE-FC has higher impedance in common & differential mode WE-FC 在共模和差模形式有较高的阻抗,Common Mode Choke Overview共模扼流圈-概述,COMPETITORS & APPLICATIONS 竞争对手 &应用,Common Mode Choke共模扼流圈,Ask PM before offering 报价前询问PM,customized
16、 parts定制品,Common Mode Choke共模扼流圈,Who to make Xref?谁来制成 Xref?,easy way 简单途径 :,If not in Alpha plan如果不在 Alpha plan系统 check the packaging first and look the our closer box check the current check the impedance or inductance value take care of the differential mode impedance (bifilar or sectional winding) check the layout 先核对包装然后看我们接近
