CEC338 EMI / EMC Pre Compliance Testing Syllabus:

CEC338 EMI / EMC Pre Compliance Testing Syllabus – Anna University Regulation 2021

COURSE OBJECTIVES:

● To introduce the basic concepts of Electromagnetic Interference
● To teach the importance of measurement device for EMI.
● To explain the EMI coupling & control principles
● To understand receivers & Analyzer functionalities
● To impart knowledge on design issues in EMI/EMC

UNIT I NATURE AND ORIGINS OF ELECTROMAGNETIC COMPATIBILITY

Introduction-Visualisiong the EMI problem-Source of EMI,EMI coupling to victim equipment, Intersystem and Intrasystem EMI, EMC standards and specifications

UNIT II TYPES of EMI COUPLING

Conducted, radiated and transient coupling; Common ground impedance coupling; Common mode and ground loop coupling; Differential mode coupling, Near field cable to cable coupling; Field to cable coupling, Power mains and Power supply coupling; Transient EMI

UNIT III MEASUREMENT DEVICES FOR EMI

Introduction – Measurement by direct connection, Inductively coupled devices, EMC antennas – Basic antenna parameters, Antennas for radiated emission testing, Wideband antennas – Magnetic field antennas, Type of antennas used in susceptibility testing

UNIT IV RECEIVERS, ANALYSERS AND MEASUREMENT EQUIPMENT

EMI receiver, Spectrum Analyzers, RF power meter Frequency meters. Standards requiring immunity tests, Automatic EMC tests, Electromagnetic transient testing, Transient types, Continuous and transient signal, ESD-electrostatic discharge

UNIT V PRE-COMPLIANCE TESTING TO AVOID EMC PROBLEMS

Need for Pre-Compliance Testing; Intersystem and Intrasystem EMC – Developing an approach to EMC design – Process flow chart, – EMC strategy – Self certification; Solutions to avoid EMC: ESD Shielding, EMI Filters; Grounding; Bonding, Isolation transformer, Transient suppressors; EMI Suppression Cables.

30 PERIODS

PRACTICAL EXERCISES: 30 PERIODS

1. Basic spectrum measurement and power measurement with markers
2. Perform environment scan and detect various signals available
3. DPX, Spectrogram and transient capture with mask test and act on violation
4. EMI spurious detection and measurement against EMI limit lines
5. Use of LISN and measurement concept of Conducted emission

List of equipments for needed for a batch of 30 students (3 in a bench):
1. Real Time Spectrum Analyser upto atleast 6.2GHz and 40MHz BW – 10 nos
2. Near Field Probes kit – 10 nos
3. 25MHz to 300 MHz Biconical antenna – 10 nos
4. 300 MHz to 1GHz Compact Log Periodic Antenna – 10 nos
5. line impedance stabilization network (LISN) – 3
6. EMI EMC Test Software – 10 nos
7. Tripod Stand – 10 nos

COURSE OUTCOMES:

At the end of this course, the students will be able to:
CO1: Perceive the various types and mechanisms of Electromagnetic Interference
CO2: Propose a suitable EMI mitigation technique.
CO3: Evaluate EMI coupling & control principles
CO4: Explain the importance receivers & Analyzer functionalities
CO5: Inspect the design issues in EMI/EMC

TOTAL:60 PERIODS

TEXTBOOKS

1. David Morgan , “A Handbook for EMC Testing and Measurement”, IET Electrical Measurement, 2012
2. Tim Williams , “EMC for Product Designers”, 5th Edition, Newnes Elsevier, 2017

REFERENCES

1. 1.V.P.Kodali, “Engineering EMC Principles, Measurements and Technologies”, IEEE Press, Newyork, 1996
2. Paul, C.R., “Introduction to Electromagnetic Compatibility”, 2nd ed., Wiley (2010)
3. David K. Cheng, “Field and Wave Electromagnetics”, 2nd ed. Pearson Education, 2009