《EMC标准与测试》PPT课件.ppt
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1、EMC标准与测试讲座内容n nEMC介绍n n标准与测试原理n n典型案例n nIEC60601-1-2介绍什么是EMC定义n nElectromagnetic compatibilityElectromagnetic compatibility(EMC(EMC,电磁兼容,电磁兼容):):n nAbility to operate in,and not overly contribute to,an Ability to operate in,and not overly contribute to,an environment of electromagnetic radiation.Whe
2、n this goal is met,environment of electromagnetic radiation.When this goal is met,all electronic equipments operate correctly in one another s all electronic equipments operate correctly in one another s presence.presence.n nElectromagnetic interferenceElectromagnetic interference(EMI(EMI,电磁骚扰,电磁骚扰)
3、:):n nElectromagnetic energy emanating from one device causing Electromagnetic energy emanating from one device causing degraded performance in another.degraded performance in another.n nElectromagneticElectromagnetic immunity,or immunity,or susceptibilitysusceptibility(EMS(EMS,电磁,电磁抗扰抗扰):):n nToler
4、ance of the presence of electromagnetic energy.Tolerance of the presence of electromagnetic energy.定义n nEMCEMC:Electromagnetic CompatibilityElectromagnetic Compatibility The capability of electrical and electronic The capability of electrical and electronic systems,equipment,and devices to operate i
5、n systems,equipment,and devices to operate in their intended electromagnetic environment their intended electromagnetic environment within within a defined margin of safety,at the a defined margin of safety,at the specified level of performance,without specified level of performance,without sufferin
6、g or causing unacceptable suffering or causing unacceptable degradationdegradation as a result of electromagnetic as a result of electromagnetic interference.interference.EMC概述n nEMC=EMI+EMSEMC=EMI+EMSn n传导:通过电源网络、信号线等。传导:通过电源网络、信号线等。n n辐射:通过空间电磁波。辐射:通过空间电磁波。EMC概述n nEMISSIONEMISSION(EMIEMI):):):):n
7、nEN 55011 EN 55011 RF Emission;RadiatedRF Emission;Radiated(辐射发射)(辐射发射)n nEN 55011 EN 55011 RF Emission;ConductedRF Emission;Conducted(传导发射)(传导发射)n nEN 61000-3-2 harmonic currents emissionsEN 61000-3-2 harmonic currents emissions (谐波)(谐波)n nEN 61000-3-3 voltage fluctuations and flickerEN 61000-3-3 v
8、oltage fluctuations and flicker (电压波动和闪烁)(电压波动和闪烁)n nIMMUNITYIMMUNITY(EMSEMS)n nEN 61000-4-2 EN 61000-4-2 Electrostatic Discharge(ESDElectrostatic Discharge(ESD,静电放电),静电放电)n nEN 61000-4-3 EN 61000-4-3 Radiated,radio-frequency,electromagnetic field(RSRadiated,radio-frequency,electromagnetic field(RS,
9、辐射抗扰),辐射抗扰)n nEN 61000-4-4 EN 61000-4-4 Electrical fast transient/burstElectrical fast transient/burst (EFT/B(EFT/B,电快速脉冲串),电快速脉冲串)n nEN 61000-4-5 EN 61000-4-5 SurgeSurge (浪涌)(浪涌)n nEN 61000-4-6 EN 61000-4-6 conducted disturbances,induced by radio-freqency fieldsconducted disturbances,induced by rad
10、io-freqency fields (传导(传导抗扰)抗扰)n nEN 61000-4-8 EN 61000-4-8 Power frequency magnetic field Power frequency magnetic field(工频磁场)(工频磁场)n nEN 61000-4-11 EN 61000-4-11 Voltage dips,short interruptions and voltage variationsVoltage dips,short interruptions and voltage variations(电压(电压跌落、中断和电压变化)跌落、中断和电压变
11、化)医疗电子的EMCn n产品标准:EN60601-1-2:2001n n产品标准引用基础标准n n取代EN60601-1-2:1993n n过渡期:2004年11月n n起草中的国标,基本等同采用EN60601-1-2:2001n nFDA的需求基本等同于EN60601-1-2:2001发射n nEN 55011 EN 55011 RF Emission;RadiatedRF Emission;Radiated(辐射发射)(辐射发射)n nEN 55011 EN 55011 RF Emission;ConductedRF Emission;Conducted(传导发射)(传导发射)产品分类n
12、 n分类依据:使用场地和预期用途。分类依据:使用场地和预期用途。n nEN55011EN55011分类:分类:n nCLASS ACLASS A:不直接连接到公用和住宅电网(工业):不直接连接到公用和住宅电网(工业)n nCLASS BCLASS B:直接连接到公用和住宅电网(家用):直接连接到公用和住宅电网(家用)n nGROUP1GROUP1:不直接利用电磁能量,如监护仪。:不直接利用电磁能量,如监护仪。n nGROUP2GROUP2:直接利用电磁能量,如高频熔炉等。:直接利用电磁能量,如高频熔炉等。n n我公司产品:我公司产品:n n目前:目前:CLASS A GROUP1CLASS A
13、 GROUP1(超声:(超声:CLASS BCLASS B)n n趋势:趋势:CLASS B GROUP1CLASS B GROUP1n n限值:限值:CLASS B=CLASS A-10dBCLASS B=CLASS A-10dBEMISSIONS LIMITS检波方式n nPeak detectorPeak detector(峰值)(峰值)(峰值)(峰值)n nQuasi-Peak detectorQuasi-Peak detector(准峰值)(准峰值)(准峰值)(准峰值)n nAverage detectorAverage detector(平均值)(平均值)(平均值)(平均值)n n
14、对于连续波,三个测量值相同。对于连续波,三个测量值相同。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 n时钟谐波。时钟谐波。n n对于一定重复频率的脉冲,峰值对于一定重复频率的脉冲,峰值 准峰值和平均准峰值和平均值值n n电源开关电路的振铃,继电器接点,电机等。电源开关电路的振铃,继电器接点,电机等。n n注意:均为包络检波注意:均为包络检波测量评判程序辐射发射测试Set-up为什么要升降?辐射测试10m开阔场辐射测试3m暗室测试规格EN 55011:1998 Class A Group 1FREQUENCY(MHz)dBuV/(at 3m)30-23050230-100057实
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