Learning objectives
This module aims to provide the basic knowledge and skills to analyze and manage the coexistence, in the same ecosystem, of electronic devices considering electromagnetic compatibility issues. The guidelines to be followed to have a design approach that takes into account EMC issues will also be provided.
At the end of the course the student is expected to know: i) the fundamentals of the Electromagnetic Compatibility, with specific applications in the automotive framework; ii) the measurement techniques and the measurement instrumentation needed for the different measurement set-ups; iii) the approaches used to limit the emissions and increase the immunity of electronic equipment. He will also know the fundamentals for realizing designs of equipment and electronic circuits meeting EMC specifications.
Prerequisites
Basic knowledge of electronics and electromagnetics.
Course unit content
General introduction to the Electromagnetic Compatibility (EMC).
EMC directives and directives for automotive. Test sites for measurements and conformity assessment procedures. Crosstalk. Disturbance and shielding. Conducted and radiated emissions. Conducted and radiated immunity.
Full programme
Automotive Electromagnetic Compatibility: what is EMC and what is EMC for Automotive. Motivations for introducing EMC in automotive. EMC Directives and CE marking. Typical automotive EMC Testing.
EMC between different systems inside the vehicle. Coupling mechanisms responsible of EMC disturbances. Pulsations in the electrical system of a vehicle. EMC-related problems between the vehicle and its surroundings. Sources of electrical noise. Coupling paths for the electromagnetic noise. EMC issues with automotive networks. Laboratory measurements.
Test sites for measurements and conformity assessment procedures. Antennas for EMC. The Spectrum Analyzer.
Conducted emissions and Conducted immunity: the Line Impedance Stabilization Network (LISN). Common-Mode and Differential-Mode Noise Currents. Power supplies and power supply filters. Conducted emission measurements. ESD and ESD protection.
Radiated Emissions: simplified emission model. Differential and Common-Mode current sources. Spectrum of a clock signal. Radiated emissions from a couple of wires. Measurement of the noise currents. Radiated Immunity: modelling and measurements.
Crosstalk: definition and modelling.
Shielding and shielding effectiveness. Models to evaluate the shielding effectiveness. Exact and approximate solutions for the Far-Field and Near-Field Conditions. Low-frequency, magnetic field shielding. Apertures in shields.
Bibliography
“Introduction to Electromagnetic Compatibility”, Clayton R. Paul, 2nd Ed., Wiley-Interscience, 2006.
“Automotive Electromagnetic Compatibility (EMC), T. Rybak, M. Steffka, Kluwer Academic Publishers, 2004”.
Teaching methods
The teaching of this module (3 credits) mainly includes delivered lectures, with theory and examples related to applications in the automotive framework.
The lectures material (slides) is provided before the corresponding class takes place.
Periodically, during the course, some lectures are carried out interactively (or in flip-mode), presenting questions to which students are required to give reasoned answers.
Assessment methods and criteria
The exam consists of an oral interview (of around 30 minutes) on the main topics of the course.
During the exam, the student can use a map with the main formulas of the course.
Other information
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2030 agenda goals for sustainable development
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