医疗器械emc标准与测试.ppt

文档介绍：EMC-标准与测试
讲座内容
EMC介绍
标准与测试原理
典型案例
IEC60601-1-2介绍
什么是EMC
定义
patibility (EMC,电磁兼容):
Ability to operate in, and not overly contribute to, an environment of ic radiation. When this goal is met, all electronic equipments operate correctly in one another 's presence.
ic interference (EMI,电磁骚扰):
ic energy emanating from one device causing degraded performance in another.
ic immunity, or susceptibility (EMS,电磁抗扰):
Tolerance of the presence of ic energy.
定义
EMC:patibility
The capability of electrical and electronic systems, equipment, and devices to operate in their intended ic environment within a defined margin of safety, at the specified level of performance, without suffering or causing eptable degradation as a result of ic interference.
EMC概述
EMC=EMI+EMS
传导:通过电源网络、信号线等。
辐射:通过空间电磁波。
EMC概述
EMISSION(EMI):
EN 55011 RF Emission; Radiated(辐射发射)
EN 55011 RF Emission; Conducted(传导发射)
EN 61000-3-2 harmonic currents emissions (谐波)
EN 61000-3-3 voltage fluctuations and flicker (电压波动和闪烁)
IMMUNITY(EMS)
EN 61000-4-2 Electrostatic Discharge (ESD,静电放电)
EN 61000-4-3 Radiated, radio-frequency, ic field (RS,辐射抗扰)
EN 61000-4-4 Electrical fast transient/burst (EFT/B,电快速脉冲串)
EN 61000-4-5 Surge (浪涌)
EN 61000-4-6 conducted disturbances, induced by radio-freqency fields (传导抗扰)
EN 61000-4-8 Power frequency ic field (工频磁场)
EN 61000-4-11 Voltage dips, short interruptions and voltage variations(电压跌落、中断和电压变化)
医疗电子的EMC
产品标准:EN60601-1-2:2001
产品标准引用基础标准
取代EN60601-1-2:1993
过渡期:2004年11月
起草中的国标,基本等同采用EN60601-1-2:2001
FDA的需求基本等同于EN60601-1-2:2001
发射
EN 55011 RF Emission; Radiated(辐射发射)
EN 55011 RF Emission; Conducted(传导发射)
产品分类
分类依据:使用场地和预期用途。
EN55011分类:
CLASS A:不直接连接到公用和住宅电网(工业)
CLASS B:直接连接到公用和住宅电网(家用)
GROUP1:不直接利用电磁能量,如监护仪。
GROUP2:直接利用电磁能量,如高频熔炉等。
我公司产品:
目前:CLASS A GROUP1(超声:CLASS B)
趋势:CLASS B GROUP1
限值:CLASS B=CLASS A-10dB