文档介绍：Introduction to EMCDecember 2008
电磁兼容(EMC)介绍Introduction To EMC
电磁兼容EMC(patibility)的定义:装置能在身处的电磁环境中正常工作而本身产生的电磁干扰不影响环境中其他装置的正常工作。
EMC stands for Electro-patibility. It is the ability of a system or product to function properly in its ic environment, without introducing intolerable ic disturbances to anything in that environment.
EMC包括电磁干扰(EMI)和抗电磁干扰(EMS)两个部分。
It covers both Electro-ic Interference (EMI) and Electro-ic Susceptibility (EMS).
什么是EMC What is EMC?
电磁兼容
发射干扰
抗扰
传导发射
辐射发射
传导抗扰
辐射抗扰
什么是EMC What is EMC?
主题 TOPICS
1. 发射干扰 Emission
2. 抗扰 Immunity
3. 10m半波暗室 10m SAC
4. 屏蔽室 Local Shielded Room
发射干扰是指产品或系统沿着电力线传输或通过空间传输的射频电磁能量,并对其所处的电磁环境造成干扰或污染。
Emission is the radio frequency energy of a product or system being transmitted along the power cord or through space as unwanted ic pollution/ interferences.
发射干扰可以分为两部分:
Emission requirements can be divided into two categories:
传导发射-传导发射标准的限值规定了150KHz到30MHz的频率范围内通过与系统连接的电缆(电源线、信号线等)耦合的传导干扰。
Conducted Emissions - Conducted emissions standards limit the conducted disturbances in the 150 KHz to 30 MHz frequency range. This limits the emissions coupled through cable (mains, signal cables) connecting to the system.
辐射发射-辐射发射的限值是在30MHz到1GHz频率范围内规定的,它保证了设备不会干扰到附近运行的系统。
Radiated Emission - Radiated emissions standards impose limits on the radiated disturbances in the 30MHz to 1 GHz frequency range. This ensures that the equipment will not interfere with the operation of systems in its vicinity.
1. 发射干扰 Emission
传导发射测试 Conducted Emission Test (Conducted)
辐射发射测试 Radiated Emission Test (Radiated)
干扰功率测试 Power Interference Test (Radiated)
非连续干扰测试 Discontinuous Disturbances Test (Conducted)
电流谐波测试 Harmonics Current Test (Conducted)
电压闪爍测试 Flicker Test (Conducted)
1. 发射干扰 Emission
这项测试检测产生于EUT(待测物)内部并且通过I/O线,控制线或电源线传输的干扰。要求EUT产生的传导发射干扰小于如CISPR 22 or EN 55022 等国际标准所规定的限值。
A test is to measure the potential interference generated inside an EUT and carried through the I/O lines, the