What is EMI, EMS and EMC

There are many acronyms in the field of electrical interference; EMI (Electro Magnetic Interference) translates directly to electromagnetic interference. This is a synthetic word, and we should consider "electromagnetic" and "interference" separately. The so-called "interference" refers to two layers of meaning: the performance of equipment is degraded by interference and the source of interference that produces interference to the equipment. The first layer of meaning such as lightning to produce radio noise, motorcycle driving in the neighborhood after the TV screen appeared snowflakes, pick up the phone after hearing the radio sound, etc., these can be referred to as and "BC I" "TV I" "Tel I", these abbreviations have the same "I" (interference) (BC: broadcasting) so EMI standards and EMI testing is which part of the EMI? Of course it is the second level of meaning, that is, the source of the interference, but also includes the electromagnetic energy before the interference. The second is "electromagnetic". If the electric charge is static, it is called static electricity. When different potentials move in unison, an electrostatic discharge occurs, generating a current around which a magnetic field is generated. If the direction and size of the current continue to change, electromagnetic waves are generated. It means the ease of performance degradation due to electromagnetic energy. In order to make it easy to understand, we compare electronic devices to human beings, and electromagnetic energy to cold viruses, and the sensitivity is whether or not it is easy to catch a cold. If it is not easy to catch a cold, that immunity is strong, that is, the English word Immunity, that is, anti-electromagnetic interference is strong.EMC (Electro Magnetic Compatibility) is directly translated as "Electromagnetic Compatibility". Meaning that the electromagnetic energy generated by the equipment neither to other equipment to produce interference, but also not other equipment electromagnetic energy interference ability. Like a blind man feeling an elephant, you feel the actual and there is a big difference. Especially with the design intention of the opposite electromagnetic phenomenon, should be regarded as EMC problems. Electromagnetic energy detection, anti-electromagnetic interference test, statistical processing of test results, electromagnetic energy radiation suppression technology, lightning and geomagnetic phenomena such as natural electromagnetic phenomena, electric and magnetic fields on the human body, the strength of the electric field of the international standard, the transmission of electromagnetic energy, the relevant standards and limitations are included in the EMC. This can be further explained by the fact that when we watch TV, if someone is using a household appliance such as a hairdryer or razor next to us, annoying snowflake streaks will appear on the screen. Rice cooker cooking rice, obviously turned off the air conditioner, after a while and then start their own ...... These are common to the phenomenon of electromagnetic interference. More seriously, if the electromagnetic interference signal impedes the medical electronic equipment that is monitoring the condition or the airplane that is flying, it will cause unimaginable consequences. Electromagnetic compatibility (EMC) refers to the ability of a device or system to operate in its electromagnetic environment in compliance with the requirements and not to produce intolerable electromagnetic interference to any equipment in its environment. Therefore, EMC includes two aspects of the requirements: on the one hand, refers to the normal operation of the equipment in the process of electromagnetic interference in the environment can not exceed a certain limit; on the other hand, refers to the existence of electromagnetic interference in the environment of the apparatus has a certain degree of immunity, that is, electromagnetic sensitivity. The so-called electromagnetic interference is any electromagnetic phenomenon that can make the equipment or system performance degradation. The so-called electromagnetic interference refers to the electromagnetic interference caused by the degradation of equipment or system performance. Customarily, EMC contains EMI (electromagnetic interference) and EMS (electromagnetic sensitivity) two aspects. With the development of electrical and electronic technology, the increasing popularity of household appliances and electronic products, radio and television, post and telecommunications communications and computers and their networks are increasingly developed, the electromagnetic environment is becoming increasingly complex and deterioration of the electromagnetic compatibility of electrical and electronic products is increasingly by the governments of various countries and manufacturers of attention. Since 1996, the European **** body stipulates that electrical and electronic products must be affixed with the CE marking can be sold in the European **** body market, countries have taken corresponding measures. As a domestic manufacturer of household electrical appliances, we must act as soon as possible to understand and improve the EMC performance of the product, to follow the new situation of EMC certification, in order to obtain an active position in the market.