EMC标准与测试课件.ppt

1、nEMC：Electromagnetic Compatibility The capability of electrical and electronic systems,equipment,and devices to operate in their intended electromagnetic environment within a defined margin of safety,at the specified level of performance,without suffering or causing unacceptable degradation as a res

2、ult of electromagnetic interference.nEMISSION（EMI）：）：nEN 55011 RF Emission;Radiated（辐射发射）nEN 55011 RF Emission;Conducted（传导发射）nEN 61000-3-2 harmonic currents emissionsnEN 61000-3-3 voltage fluctuations and flickernIMMUNITY（EMS）nEN 61000-4-2 Electrostatic Discharge(ESD，静电放电）nEN 61000-4-3 Radiated,rad

3、io-frequency,electromagnetic field(RS，辐射抗扰）nEN 61000-4-4 Electrical fast transient/burst(EFT/B，电快速脉冲串）nEN 61000-4-5 SurgenEN 61000-4-6 conducted disturbances,induced by radio-freqency fieldsnEN 61000-4-8 Power frequency magnetic field（工频磁场）nEN 61000-4-11 Voltage dips,short interruptions and voltage

4、variations（电压跌落、中断和电压变化）发射nEN 55011 RF Emission;Radiated（辐射发射）nEN 55011 RF Emission;Conducted（传导发射）nPeak detector（峰值）（峰值）nQuasi-Peak detector（准峰值）（准峰值）nAverage detector（平均值）（平均值）n对于连续波，三个测量值相同。对于连续波，三个测量值相同。n时钟谐波。n对于一定重复频率的脉冲，峰值准峰值和平均值n电源开关电路的振铃，继电器接点，电机等。n注意：均为包络检波测试Set-upEN 55011:1998 Class A Grou

5、p 1FREQUENCY(MHz)dBuV/(at 3m)30-23050230-100057测试set-up测试原理示意图Line Impedance Stabilization Network（线路阻抗稳定网络），Artificial Mains Networks（人工电源网络）EN 55011:1998 Class A Group 1FREQUENCY(MHz)Quasi-peak(dBuV)Average(dBuV)0.15-0.5079660.5-30.07360nEN 61000-3-2 harmonic currents emissionsnEN 61000-3-3 voltag

6、e fluctuations and flickerHarmonic：Basic Standard:EN 61000-3-2:1995LIMITS FOR CLASS A EQUIPMENTHARMONICS ORDER NMAX PEMISSIBLE HARMONICS CURRENT AODD HARMONICS32.3051.1470.7790.40110.33130.2115=n=390.15x15/nEven harmonics2 1.084 0.436 0.308=n=400.23x8/nvoltage fluctuations and flickerBasic Standard:

7、EN 61000-3-3:1995 TEST ITEMLIMITNOTEPst 1.0Pst means short-term flicker indicatorPIt0.65PIt means long-term flicker indicatorTdt(ms)200Tdt means maximum time that dt exceeds 3%Dmax(%)4%dmax means maximum relative voltage change.Dc(%)3%dc means maximum relative steady-state voltage change抗扰度测试nEN 610

8、00-4-2 Electrostatic Discharge(ESD，静电放电）nEN 61000-4-3 Radiated,radio-frequency,electromagnetic field(RS，辐射抗扰）nEN 61000-4-4 Electrical fast transient/burst(EFT/B，电快速脉冲串）nEN 61000-4-5 SurgenEN 61000-4-6 conducted disturbances,induced by radio-freqency fieldsnEN 61000-4-8 Power frequency magnetic field

9、（工频磁场）nEN 61000-4-11 Voltage dips,short interruptions and voltage variations（电压跌落、中断和电压变化）实际应用中的ESD现象电流回流路径为分布电容Basic Standard:EN 61000-4-2:2001Discharge Voltage:Contact Discharge+/-2KV,+/-4kv,+/-6kV(Direct/Indirect)Air Discharge+/-2KV,+/-4kv,+/-8 kV(Direct)起源测试set-upBasic Standard:EN 61000-4-4:1995

10、Test Voltage:Power Line 2 kV,I/O cable 1kV实际环境中的辐射干扰测试set-upBasic Standard:EN 61000-4-3:2001Frequency Range:80 MHz-2500 MHzField Strength:3 V/mModulation:2HZ Sine Wave,80%,AM ModulationDwell time3s同步叠加Basic Standard EN 61000-4-5:1995Test Voltage1 kV differential mode2 kV common modeBasic Standard:EN

11、 61000-4-6:2001Frequency Range:0.15 MHz-80 MHzField Strength:3VModulation:2Hz Sine Wave,80%,AM ModulationCoupled Cable:Power Mains,I/O linesDwell time3sCPUBasic Standard:EN 61000-4-8:2001Frequency Range:50Hz,60HzField Strength:3 A/mDIP：电源跌落与中断：电源跌落与中断Basic Standard:EN 61000-4-11:1994Voltage test level%UrVoltage dip%UrDuration Periods950.5406057030252955