EMC - Coupling mechanisms and counter-measures
An EM interference phenomenon may be summed up in Figure R31 below.
Fig. R31: EM interference phenomenon The different sources of disturbances are:
- Radio-frequency emissions
- Wireless communication systems (radio, TV, CB, radio telephones, remote controls)
- Radar
- Electrical equipment
- High-power industrial equipment (induction furnaces, welding machines, stator control systems)
- Office equipment (computers and electronic circuits, photocopy machines, large monitors)
- Discharge lamps (neon, fluorescent, flash, etc.)
- Electromechanical components (relays, contactors, solenoids, current interruption devices)
- Power systems
- Power transmission and distribution systems
- Electrical transportation systems
- Lightning
- Electrostatic discharges (ESD)
- Electromagnetic nuclear pulses (EMNP)
The potential victims are:
- Radio and television receivers, radar, wireless communication systems
- Analogue systems (sensors, measurement acquisition, amplifiers, monitors)
- Digital systems (computers, computer communications, peripheral equipment)
The different types of coupling are:
- Common-mode impedance (galvanic) coupling
- Capacitive coupling
- Inductive coupling
- Radiated coupling (cable to cable, field to cable, antenna to antenna)
ru:ЭМС - Механизмы электромагнитной связи и меры противодействия
zh:电磁兼容 - 耦合机理和防范措施
