What is EMI, EMS and EMC? And the differenece between?
Susan Pang
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Susan Pang
Aipulnion Power Converter ISO900I/IATF16949 manufacturer | AC/DC Power Supply | Isolated DC/DC Converter | Switching Regulator | Transceiver Module | EMC Filter | Custom Power Supplies mail:[email protected]
EMI and EMC are important considerations for electronic components, do you know what they mean? And the difference between?
EMI meaning
Electromagnetic Interference, can be defined as electromagnetic energy which affects the functioning of an electronic device, also mean “Electronic products pollute the power grid and space electromagnetic environment due to voltage (Dv/Dt) current mutation (Di/Dt)”.
EMS Meaning
Electromagnetic Susceptibility, Refers to the sensitivity of electronic equipment to electromagnetic interference.
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EMC meaning
Electromagnetic Compatibility, a measure of a device's ability to operate as intended in its shared operating environment while, at the same time, not affecting the ability of other equipment within the same environment to operate as intended, which also means ”tolerate outside disturbances and do not disturb the outside world”.
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Conducted emissions?– unwanted electromagnetic energy carried into an electronic system via wires, PCB traces, etc. It can take for form of common-mode or differential-mode (also called normal-mode) energy. Standards: CISPR22/EN55032
Radiated emissions?– unwanted electromagnetic energy that is radiated through space from the source of the interference to the electronic system. Standards: CISPR22/EN55032
Coupled emissions?– unwanted electromagnetic energy that is capacitively or inductively coupled from the source of the interference to the electronic system.
Electro-Static Discharge (ESD)?— This a test of the ability of the equipment under test to absorb an electrostatic impulse to the enclosure. Standards: IEC 61000-4-2, EN 61000-4-2
Radiated Immunity / Radiated Susceptibility?— The response of equipment to the presence of external radiation from communication devices applied to the enclosure. Standards: IEC 61000-4-3, EN 61000-4-3
Fast Transient / Burst?— The ability of the equipment to operate while repetitive burst transients are applied to the cables. These types of events are often caused by inductive load switching. Standards: IEC 61000-4-4, EN 61000-4-4
Surge?— The ability of the equipment to operate while surge voltages are applied to the cables. These types of events can be caused by large inductive load turning off, or lightning strikes. Standards: IEC 61000-4-5, EN 61000-4-5
Conducted Immunity / Conducted Susceptibility?— The response of equipment to the presence of conducted noise from nearby equipment and transmitters via the cables. Standards: IEC 61000-4-6, EN 61000-4-6
Sag / Interruption?— The ability of the equipment to operate or survive a sag or momentary interruption in the line voltage cable. Standards: IEC 61000-4-11, EN 61000-4-11
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Contact:Ms Susan; Email:[email protected]