UNIT-I.pptx
- 1. EC8072 ELECTROMAGNETIC INTERFERENCE AND COMPATIBILITY PREPARED BY R.PONNI ,AP/ECE
- 2. EMI- ELECTROMAGNETIC INTERFERENCE • An Electromagnetic disturbance which may degrade the performance of an equipment or device or cause malfunction of the equipment is called electromagnetic interference. • Refers to the interaction between electric and magnetic fields and sensitive electronic circuits and devices.
- 3. EMC- ELECTROMAGNETIC COMPATIBILITY • Electromagnetic Compatibility is a near perfect state in which a receptor (device or system) functions are satisfactorily in common electromagnetic environment without introducing intolerable electromagnetic disturbance to any other device/ equipment/system in that environment
- 4. EMC • Electromagnetic Compatibility is a near perfect state in which a receptor (device or system) functions are satisfactorily in common electromagnetic environment without introducing intolerable electromagnetic disturbance to any other device/ equipment/system in that environment
- 5. Mechanisms of Electromagnetic Interference (EMI) • Electromagnetic Compatibility is a near perfect state in which a receptor (device or system) functions are satisfactorily in common electromagnetic environment without introducing intolerable electromagnetic disturbance to any other device/ equipment/system in that environment
- 6. Mechanisms of Electromagnetic Interference (EMI) • Path 1:Direct radiation from source to receptor. • Path 2:Direct radiation from source picked up by the electrical power cables or the signal/control cables connected to the receptor , which reaches the receptor via conduction. • Path 3: EMI radiated by the electrical power, signal or control cables of the source. • Path 4:EMI directly conducted from its source to the receptor via common electrical power supply lines or via common signal/control cables.
- 7. Mechanisms of Electromagnetic Interference (EMI) • The primary mechanism by which EMI moves from its source to the receptor are radiation and conduction. • The receptor becomes a victim when the intensity of the EMI is above tolerable limit.
- 9. Practical experiences & concerns EMI/EMC Interference (EMI)
- 10. Types of EMI •Based on causes and problems: 1. Intra-EMI 2. Inter-EMI •Based on the way it was created: 1.Man made EMI 2.Naturally occurring EMI
- 11. Types of EMI •Based on its duration: 1.Continuous Interference 2.Impulse Interference •Based on its bandwidth: 1.Narrowband EMI 2.Broadband EMI
- 12. Effects of Radiation on the human body •Hair •Brain •Thyroid •Blood system •Heart •Gastrointestinal tract •Reproductive tract