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EMC electromagnetic compatibility

Electromagnetic Compatibility refers to the ability of a device or system to meet its requirements in an electromagnetic environment and not be subjected to unacceptable electromagnetic disturbances on any device in its environment. Therefore, EMC includes two requirements: on the one hand refers to the normal operation of equipment in the environment of electromagnetic disturbance (Electromagnetic Disturbance) can not exceed a certain limit; the other hand refers to the equipment exists in the environment Electromagnetic disturbance has a certain degree of immunity, that is electromagnetic susceptibility (Electromagnetic Susceptibility, EMS).

Since the advent of electronic system noise reduction in the mid-1970s, mainly due to the Federal Communications Commission in 1990 and the European Union in 1992, regulations were put forward on commercial digital products that required companies to ensure that their products met strict magnetization coefficients And launch guidelines. Products that comply with these regulations are called Electromagnetic Compatibility (EMC).

The EU CE-EMC Directive 2014/30 / EU is a comprehensive assessment of electromagnetic interference (EMI) and interference immunity (EMS) of electronic products and is one of the most important indicators of product quality. The measurement of electromagnetic compatibility Site and test equipment.


Electromagnetic compatibility (EMC) is a discipline that studies the coexistence of various types of electrical equipment (generalized and living organisms) under limited space, time and spectrum resources without causing degradation. It includes two parts of electromagnetic interference and electromagnetic sensitivity. The electromagnetic interference test measures the size of the electromagnetic wave signal generated and emitted by the device under test in the normal working state to reflect the interference to the surrounding electronic equipment. Electromagnetic susceptibility testing is the ability of the device under test to measure the immunity to electromagnetic disturbances. Electromagnetic interference mainly includes radiated emission and conducted emission.

 Radiation emissions: Electromagnetic interference that propagates through space in the form of electromagnetic waves.

 Conducted emission: electromagnetic interference transmitted along the conductor.

EMC product certification programs: CE, FCC, IC, PSE, GCC, CCC

Exports to Europe's electrical and electronic products

Wireless products exported to Europe

Exported to Europe automotive electronics

Exports to the United States of electrical and electronic products

Export Canada's electrical and electronic products

EMC test items include:

Empty test room test

Conducted interference

Power radiation

Magnetic field radiation

Harmonic current

Voltage fluctuations and flicker

Sizzling sound

Electrostatic discharge

Radiation immunity

Electrical Fast Transient Burst

Surge / lightning strike

Conducted immunity

Power frequency magnetic field

Voltage drop / interruption

Interharmonic immunity

Magnetic field exposure test

Electromagnetic radiation 

Electromagnetic radiation immunity (anechoic chamber)

High current injection

Transient conduction emission

Transient conducted immunity