EMC/EMI Filters
9Pages

Basic knowledge of electromagnetic compatibility and Filter 电磁兼容与滤波器基础知识 Conducted EMI Types 传导干扰的分类 Insertion loss 插入损耗 Conducted interference is divided into two types: ■ Common-mode interference:the interference between phase lines of power lines and ground wires, and between the midline and ground. Common-mode line and the midline of the phase-existence of the same size, the same phase. ■ Differential-mode interference:the interference between phase lines of power lines and the midline.Differential-mode interference current in the phase line and the midline of the size, phase contrast. EMI power supply filter should also have the right common mode interference and differential mode interference In vivo. 传导干扰分为两种类型： ■ 共模干扰：电源线的相线以及中线和地线之间存在的干扰。共模在相线和中线中同时存在，大小相等，相位相同。 ■ 差模干扰：电源线的相线和中线之间存在的干扰。差模干扰电流在相线和中线中大小，相位相反。 EMI电源滤波器应同时具有对共模干扰和差模干扰的抑制作用。 Insertion loss (IL) is the ratio that filter access port voltage of the circuit before and after, be expressed with the following: Insertion loss (IL) = 20LgV1/V2 Where: V1- the interference signal voltage before filter access V2- the interference signal voltage after filter access Insertion loss test methods are detailed in the CISPR17 requirements. In general, product samples provided on the insertion loss curve is obtained in the 50Ω system: the assumption on both sides of the output power and load, input impedance is resistive to 50Ω. As the actual use of the environment in the power side and load side of the impedance vary greatly, so when you get the actual use of the insertion loss values and the samples of different nominal values of insertion loss. Therefore, the selection of EMI power filter is the best way to access equipment that it carried out the actual tests. Under normal circumstances, insertion loss cur ves for differential-mode insertion loss and common mode insertion loss basis. 一般情况下，插损曲线分别以差模插入损耗和共模插入损耗的方式提供。 CM Ground Wires 地线 Common-mode interference 共模干扰示意图 EMI Power Line Filter EMI电源滤波器 Differential-mode interference 差模干扰示意图

Basic knowledge of electromagnetic compatibility and Filter 电磁兼容与滤波器基础知识 Rated current 额定电流 Rated current is defined as under the conditions of safe use conditions, the filter at an ambient temperature of 40℃,the maximum current allowed through. When the ambient temperature exceeds 40℃,when filter allows the current estimate by the following formula: Where: IN-nominal rated current,θ-Ambient temperature 30A Leakage current 泄漏电流 Leakage current: at a given voltage and frequency, the current flow between the filter-phase line or the midline and ground. Under normal circumstances, leakage...

SIKES ■ Product Profile Low leakage current to meet with medical machine special requirements. Applicable to suppressing noise and high frequency harmonic in power. Low leakage current with high insert lose of noise. Control EMI interference between line and line,line and ground. Available for electronic equipments and measuring instruments. ■ Product Size ^SR^S ■ Product Features ■ Rated Voltage:AC 250V ■ Operating Frequency:50/60Hz ■ Rated Current:10-300A ■ Test Voltage(1min):1500VDC (Line/line) 1750VAC(Line/Ground) ■ Climatic category:25/085/21 ■ Product Characteristics and Selection...

SIKES ■ Product Profile High performance filters with differential mode choke. Broadband attenuation characteristics. Available for various digital systems(partically for inverters or switching power supplies). ■ Product Size Common Mode iftfM Differential Mode ■ Product Features ■ Rated Voltage:AC 250V ■ Operating Frequency:50/60Hz ■ Rated Current:3-80A ■ Test Voltage(1min):DC 1500V (Line/line) AC 1500V(Line/Ground) ■ Climatic category:25/085/21 ■ Product Characteristics ■ Electrical Diagram i^^ElB Type ■ Typical Insertion Losses:(Measured in 50Q system) *M}iAfwi€ : ( )

EMI Three-phase Input Filter EMI 三相输入滤波器 φ6-12±0.5 This category of products has superior capability of interference containment and can be applied to data processing system,telecommunication equipment inverter and power conditioning equipment that impose high requiremet on interference containment. Product Features Product Characteristics 产品特性 ■ Operating Frequency:50/60Hz ■ Range of Temperature:-25~85℃ ■ Insulation Resistance:Phase to ground (up to 300A)≥1500MΩ ■ Rated Voltage:AC 440/250V ■ Test Voltage (1 minute):Phase to Phase DC 1500V; 该类产品具有良好的干扰抑制能力，可用于数据处理系统、电信系统、变频器及电源净化等需要强干扰...

■ Selection Table ■ Product Profile Type This category of products has superior capablity of interference containment.lt is usually installed at inverter's output terminal and able to minimize the electromagnetic interference generated by inverter. ■ Rated Voltage:AC 440/250V ■ Test Voltage (1 minute):Phase to Phase DC 1500V; Phase To Ground AC 1500V/DC ■ Operating Frequency:50/60Hz ■ Range of Temperature:-25~85°C ■ Insulation Resistance:Phase to ground >1500Mft ■ Electrical Diagram *^^HS PE ■ Product Size ^SR^S Picture A

Selection Table Picture C Picture D Type Product Characteristics T^pp^tt Typical Insertion Deamplification:To be tested in a 50£2 system ) Note:lt should be guaranteed that products marked with ♦ Be connected to ground safely. =§■;£ :

Three Phases Four Wires High Performance Filters 三相四线高性能滤波器 φ6-12±0.5 同等功率下相对较小的体积； 主要用来抑制工业电网通过电源线对设备的电磁干扰； 对线-线和线-地间干扰具有优良的抑制力； 适用于三相四线制供电设备。 Technical Specifications Relative small volume at equal power. Mainly used to supress the EMI to the equipment in industrial power net. Provide high performance of effectively suppressing EMI both in line-to-line and line-toground. Available for three phases,four lines series power supply equipments. Product Profile 产品简述 ■ Rated Voltage:AC 440V ■ Test Voltage (1 minute):Line to Line DC 1500V; ■ Operating Frequency:50/60Hz ■ Rated Current:3-500A ■...

Product Profile ■ Selection Table Type Brief descriptionn:Conversion of the PWM output signal of motor drives into a smooth sine wave with low residual ripple,avoiding the motor insulation damage.Reduce the resonance phenomenon because of distributed capacitance and inductance because of the long cable; Eliminate the excessive motor voltage caused by high dv/dt;Eliminate motor damage caused by eddy loss; Reduce noise of motor by filter application. ; ;m®dv/dt ; im® Note:It should be guaranteed that products marked with ♦ Be connected to ground safely. Colied with foil winding...