- Docente: Leonardo Sandrolini
- Credits: 6
- SSD: ING-IND/31
- Language: Italian
- Teaching Mode: Traditional lectures
- Campus: Bologna
- Corso: First cycle degree programme (L) in Electrical Energy Engineering (cod. 8610)
Learning outcomes
The course provides the basic knowledge of electromagnetic
compatibility, with particular reference to conducted and radiated
disturbances, coupling paths and guidelines to design systems which
are electromagnetically compatible with their environment.
Moreover, the main measurement methods and instruments used in the
international and national standard framework are examined.
Course contents
Introduction to electromagnetic compatibility (EMC)
Examples of EMC problems. Main sources of electromagnetic
disturbances. Emission and immunity. Conducted disturbances and
radiated disturbances. Typical EMC units of measurement.
Nonideal behaviour of electrical circuit components
Real lumped component models of conductors, capacitors,
inductors and resistors. Resistance and inductance of conductors
versus frequency. Frequency response of the impedance of real
lumped components: capacitors, inductors, resistors.
Conducted emissions
Common mode (CM) and differential mode (DM) conducted disturbances.
Sources of conducted interference. Standards. Methods and
instruments of measurement. Spectrum analyzer and EMI receiver
basics. Line impedance stabilization network (LISN). Current
probes. Troubleshooting conducted interference: filters, power
supply, positioning of components inside the equipment. EMI
Filters: insertion loss, block of CM and DM interference, filtering
problems.
Radiated emissions
Model of emission for DM currents. Model of emission for CM
currents. Standards. Methods and instruments of measurement.
Radiated emission test sites. Troubleshooting radiated
emissions.
Conducted immunity
Conducted immunity issues. Immunity testing. Disturbances in the
distribution networks. Pulsed disturbances: burst, surge and test
systems. Voltage variations and test systems. Electrostatic
discharges. Standards.
Radiated immunity
Radiated immunity issues. Bifilar line terminal voltages induced by
a uniform plane wave. Standards. Methods and instruments of
measurement. Test sites. Troubleshooting radiated immunity. Basics
of electromagnetic shielding.
EMC antennas
Antenna basics. Examples of EMC antennas: monopole, dipole,
biconical, logperiodic and bilog antennas. Antenna factor and
antenna bandwidth. Baluns.
EMC Directive 2014/30/EU
Scope and definitions. Conformity assessment procedures for
electric and electronic equipment. EMC analysis flow chart.
Readings/Bibliography
C. R. Paul, Compatibilità Elettromagnetica, Hoepli, Milano,
1995.
H. W. Ott, Electromagnetic Compatibility Engineering, John Wiley
& Sons, NJ, USA, 2009.
Teaching methods
Students will participate to laboratory exercises that allow them
to apply the material covered in the lessons.
Assessment methods
Oral exam.
Teaching tools
Handouts of slides are available to students.
Office hours
See the website of Leonardo Sandrolini