- EMI
Electro Magnetic Interference.
This is a compound word. We should consider “electro” and “interference” separately. The so-called “interference” refers to the two-tiered meaning of the performance degradation of the equipment after being interfered with and the interference sources that cause interference to the equipment, The first meaning is that thunder and lightning cause noise on the radio,snowflakes appear on the TV screen after a motorcycle is driving nearby, and radio sounds are heard after picking up the phone.These can be abbreviated as “BC I”,”TV I” and “Tel I”, these abbreviations all have the same “I” (interference) (BC:broadcast,TV:television,Tel:telephone). Sources of interference may include radar transmitters, electric motors, computer clocks, lightning, electrostatic discharge, and many other phenomena. Second is “electro”, If the charge is stationary, it is called static electricity. When different potentials move in unison, electrostatic discharge occurs, generating a current, and a magnetic field is generated around the current. If the direction and magnitude of the current continue to change, electromagnetic waves are produced.
- EMI Filter
Electro Magnetic Interference filter.
It is a passive filter composed of inductors and capacitors, It allows useful low-frequency signals to pass smoothly and inhibits high-frequency interference, This filter is a new type of component that has been popularized and applied in recent years. It can effectively suppress power grid noise, improve the anti-interference ability of electronic equipment and the reliability of the system. It can be widely used in electronic measuring instruments, computer room equipment, switches power supply, measurement and control systems and other fields.
