EMC includes EMI (electromagnetic interference) and EMS (electromagnetic tolerance). The so-called EMI electromagnetic interference is the electromagnetic noise produced by the machine itself in the process of performing its due functions, which is not conducive to other systems; EMS refers to the ability of a machine to perform its due functions without being affected by the surrounding electromagnetic environment.
Electro Magnetic Compatibility (electromagnetic compatibility) The normal working ability of all kinds of electrical or electronic equipment to meet the design requirements with a specified safety factor in the same space with complex electromagnetic environment. Also known as electromagnetic compatibility.
Therefore, EMC includes two requirements: on the one hand, it means that the electromagnetic interference generated by equipment during normal operation cannot exceed a certain limit; On the other hand, it means that electrical appliances have a certain degree of immunity to electromagnetic interference in their environment, that is, electromagnetic sensitivity.
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All kinds of operating power equipment are interrelated and influenced by electromagnetic conduction, electromagnetic induction and electromagnetic radiation, which will cause interference, influence and harm to operating equipment and personnel under certain conditions.
Electromagnetic compatibility (EMC), which emerged in 1980s, aims at studying and solving this problem, mainly studying and solving the mechanism of interference generation, propagation, reception and suppression, as well as the corresponding measurement and measurement technology. On this basis, according to the most reasonable principle of technology and economy, the interference level, anti-interference level and suppression measures are clearly defined.
The institutions that carry out electromagnetic compatibility (including electromagnetic interference and electromagnetic tolerance) detection and testing include Suzhou Electric Research Institute, Aerospace Environmental Reliability Test Center, Environmental Reliability and Electromagnetic Compatibility Test Center and other laboratories.