我整理的一些EMC资料,希望能给用到的网友有点作用!

pgh696

  文字
问题：什么是emc？emc是什么意思？
EMC是Electromagnetic Compatibility的缩写，中文译为电磁兼容。美国学者Bernhard Keiser曾把EMC定义为：“Electrical and electronic devices are said to be electromagnetically compatible when the electrical noise generated by each does not interfere with the normal performance of any of the others. Electromagnetic compatibility is that happy situation in which systems work as intended, both within themselves and in their environment.”国际电工委员会（IEC）、美国国防部《国防及有关名词字典》以及美国国家标准学会暨美国电工与电子学会联合出版的《IEEE电工与电子学名词标准字典》都对EMC作了类似的定义。根据以上定义，国内不少学者多将EMC直译为电磁兼容，但如前言所述，EMC学科领域范围日益扩大，现已不只限于电子设备本身，还涉及到电磁污染、电磁饥饿等一系列生态效应问题以及其他多方面的问题，“电磁兼容”一词似已不能包含EMC学科的全部内容。日本文献对EMC作了如下定义：“EMC是一门独立的学科，随着电磁能量利用的发展，它将研究：猜测并控制变化着的地球和天体四周的电磁环境、为了协调环境所采取控制方法、各项电气规程的制定以及电磁环境的协调和电磁能量的合理应用等。”正是由于本学科涉及范围很宽，包括工程学、自然科学、医学、经济学、社会学等多方面的基础科学理论，且其理论体系也有一定的非凡性，故本学科有时也取名为环境电磁学。 www.58live.com.cn
谈到环境电磁学的历史，则可上溯至19世纪。最早出现的电干扰现象是单线电报间的串扰。希维赛德于1881年写了一篇“论干扰”的文章可算是最重要的早期文献。但这类干扰现象在当时并未引起干扰者和被干扰者的重视，随着电气运输的出现，在一根通信线与不对称的强电线之间有较长的平等运行，干扰问题的日益严重，这样在1887年柏林电气协会就成立了全部干扰问题委员会，成员有赫姆霍尔兹和西门子等。紧接着英国邮电部门在1889年研究了通信干扰问题。美国“电世界”杂志也登载电磁感应方面的文章。20世纪初期索末菲在这方面进行了卓越的研究。以后人们对电磁感应影响的研究日益深入，其中波拉切克、卡尔生、哈波兰德、尚德、克留威、柯列、韦特、柯斯琴科、米哈依洛夫、拉茹莫夫等学者的工作都很突出。直至目前，此类干扰问题仍为国际电信联盟（ITU）第五研究组及第六研究组在各研究期的主要研究课题。

faifaide

哦，这个定义倒是不错，学习了哈，谢谢 [s:9]

jung

哇，真的是受用了，感謝

ayl439

o .了解一下历史也不错

anz123

有空我也整理一个

nicktu

1.
Emissions:
Propagation of electromagnetic interference (EMI)
from noncompliant devices (culprits), and in particular radiated
and conducted radio frequency interference (RFI)
2.
Susceptibility:
The detrimental effects on susceptible devices (victims)
of EMI in forms that include electrostatic discharge (ESD)
and other forms of electrical overstress (EOS)

nicktu

Electromagnetic compatibility (EMC)
—The ability of a product to coexist
in its intended electromagnetic environment without causing or
suffering functional degradation or damage.
Electromagnetic interference (EMI)
—A process by which disruptive
electromagnetic energy is transmitted from one electronic device to
another via radiated or conducted paths (or both). In common usage,
the term refers particularly to RF signals, but EMI can occur in the
frequency range “from dc to daylight.”
Radio frequency (RF)—
The frequency range within which coherent electromagnetic
radiation is useful for communication purposes—
roughly from 10 kHz to 100 GHz. This energy may be generated
intentionally, as by a radio transmitter, or unintentionally as a byproduct
of an electronic device’s operation. RF energy is transmitted
through two basic modes:
Radiated emissions (RE)
—The component of RF energy that is
transmitted through a medium as an electromagnetic field. RF
energy is usually transmitted through free space; however, other
modes of field transmission may occur.
•
Conducted emissions (CE)
—The component of RF energy that is
transmitted through a conductive medium as an electromagnetic
field, generally through a wire or interconnect cables. Line conducted
interference (LCI) refers to RF energy in a power cord.

nicktu

Susceptibility
—A relative measure of a device or system’s propensity to
be disrupted or damaged by EMI exposure.
Immunity
—A relative measure of a device or system’s ability to withstand
EMI exposure.
Electrical overstress (EOS)
—Damage or loss of functionality experienced
by an electronic device as a result of a high-voltage pulse. EOS
includes lightning and electrostatic discharge events.
Electrostatic discharge (ESD)
—A high-voltage pulse that may cause
damage or loss of functionality to susceptible devices. Although
lightning qualifies as a high-voltage pulse, the term ESD is generally
applied to events of lesser amperage, and more specifically to events
that are triggered by human beings. However, for the purposes of this
text, lightning will be included in the overall ESD category because
the protection techniques are very similar, although differing in magnitude.

leihey

文字[文字size=4]文字楼主好样的，受教了！ [s:9]

rocjoe

EMC，太深奥了