The first is the concept of electromagnetic interference
Electromagnetic radiation (Electromagnetic Interference, EMI) refers to all the magnetic induction conditions caused when the conduction or electromagnetic field reduces the characteristics of the device, equipment or system with voltage and current, or will cause adverse effects on living organisms or substances.
On the other hand, the generation of electromagnetic interference
1, produce electromagnetic interference
ACDC power module
The origin of scrambling, sensitive facilities and decoupling paths, are called the basic elements of electromagnetic interference. For switching module power supplies, drastic changes in current or voltage can cause noise, so high-power and high-frequency electronic components are a source of EMI noise. Specifically, its origins are:
(1) External coupling and interference (mainly generated at the input and output);
(5) Energy storage inductance;
(6) Unreasonable PCB layout and wiring cause loop interference.
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