EMC标准与测试

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

2、a result 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 emissions nEN 61000-3-3 voltage fluctuations and flicker nIMMUNITY（EMS） nEN 61000-4-2 Electrostatic Discharge (ESD，静电放电） nEN 61000-

3、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 Surge nEN 61000-4-6 conducted disturbances, induced by radio-freqency fields nEN 61000-4-8 Power frequency magnetic field （工频磁场） nEN 61000-4-11 Voltage dips, shor

4、t interruptions and voltage 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

5、注意：均为包络检波 测试Set-up EN 55011:1998 Class A Group 1 FREQUENCY (MHz)dBuV/ (at 3m) 30-23050 230-100057 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 1 FREQUENCY (MHz)Quasi-peak(dBuV)Average(dBuV) 0.15 -0.507966 0.5-30.07360

6、nEN 61000-3-2 harmonic currents emissions nEN 61000-3-3 voltage fluctuations and flicker Harmonic： Basic Standard:EN 61000-3-2:1995 LIMITS FOR CLASS A EQUIPMENT HARMONICS ORDER NMAX PEMISSIBLE HARMONICS CURRENT A ODD HARMONICS 32.30 51.14 70.77 90.40 110.33 130.21 15=n=390.15x15/n Even harmonics 2 1

7、.08 4 0.43 6 0.30 8=n=400.23x8/n voltage fluctuations and flicker Basic Standard:EN 61000-3-3:1995 TEST ITEMLIMITNOTE Pst 1.0Pst means short-term flicker indicator PIt0.65PIt means long-term flicker indicator Tdt (ms)200Tdt means maximum time that dt exceeds 3% Dmax (%)4% dmax means maximum relative

8、 voltage change. Dc (%)3%dc means maximum relative steady-state voltage change 抗扰度测试 nEN 61000-4-2 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 Surge nEN 61000-4

9、-6 conducted disturbances, induced by radio- freqency fields nEN 61000-4-8 Power frequency magnetic field （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 61000-4-2:2001 Discharg e Volta ge: Contact Discharge +/-2K

10、V,+/-4kv,+/-6kV (Direct/Indirect) Air Discharge+/-2KV,+/-4kv, +/-8 kV (Direct) 起源 测试set-up Basic Standard: EN 61000-4-4:1995 Test Voltage: Power Line 2 kV, I/O cable 1kV 实际环境中的辐射干扰 测试set-up Basic Standard: EN 61000-4-3:2001 Frequency Range: 80 MHz - 2500 MHz Field Strength: 3 V/m Modulation: 2HZ Sin

11、e Wave, 80%, AM Modulation Dwell time3s 同步叠加 Basic Standard EN 61000-4-5:1995 Test Voltage1 kV differential mode 2 kV common mode Basic Standard: EN 61000-4-6:2001 Frequency Range:0.15 MHz - 80 MHz Field Strength: 3V Modulation: 2Hz Sine Wave, 80%, AM Modulation Coupled Cable:Power Mains, I/O lines Dwell time3s CPU Basic Standard:EN 61000-4-8:2001 Frequency Range:50Hz, 60Hz Field Strength: 3 A/m DIP：