Practical Approach to EMI/EMC Troubleshooting (DS4-14-0)

Synopsis(This course is adapted from the previous course entitled "Essential for EMC Compliance" to place more emphasis on the practical approach to EMC/EMI troubleshooting. You may find 50% content resemblance between the two courses.)

The widespread use of small, high-speed electronic devices, which are often operated near other electrical systems, as well as the explosion in the number and variety of wireless communication devices available, has resulted in concern about electromagnetic interference effects. Faster and more complex circuits are being crowded into ever smaller space, increasing the likelihood that devices operating in such systems will adversely affect one another. Modern electronic devices must therefore be able to function properly in an increasingly cluttered electromagnetic environment.

The course is designed to provide participants with practical trouble shooting methodologies to assess the emission and susceptibility characteristics of their products and relevant basic knowledge to understand the principles of electromagnetic compatibility (EMC) and electromagnetic interference (EMI). This course is valuable for all engineers who work in a cross-functional product development project team.

Course Highlights
The instructor will enhance students' appreciation of EMI theory through a series of case studies and demonstration as follows:

• Spectrum of a noise source
• Measurement of Conducted & Radiated emissions
• Stray inductance and capacitance
• Effect of bypass capacitors
• Noise on supply and ground tracks
• Transfer impedance of cables
• Magnetic and capacitive coupling and mitigation
• Application of magnetic pickup loops and current probes
• Use of ferrites for EMI control
• EM shielding and grounding
• ESD protective materials

This is achieved through the use of time-domain and frequency-domain measurement equipments, standard PCI card as sample, and other specially designed demonstration kits (see pictures below)



What previous participants say about this course
Answers to the question 'what did you like most about the course'

• "Sufficient theory and very good practical demonstration" - 29 Mar 05
• "Good documentation & good presenter & good demo" - 29 Mar 05
• "Dr Tee gives a lot of real life example that makes the theory more easily to understand" - 5 Jul 05
• "Simple explanation & experiment make it more easier to understand" - 5 Jul 05
• "The course structure, hands-on exposure, and practically was excellent" - 12 Dec 05
• "Lively demonstration from trainer on real life example" - 12 Dec 05
• "Basic theories A&B, PCB layout, Filters, all EMC demonstrations, plenty of sample shown" - 8 Feb 06
• "A lot of demos to understand the basic, a lot of theories being taught in interesting manner" - 8 Feb 06

What You Will Learn

• knowledge necessary to design electronic equipment which is compatible with the electromagnetic environment
• practical design aspects of EMC/EMI control in the design of electronic products
• practical EMC/EMI trouble-shooting and measurement techniques

Who Should Attend

• electrical/electronic design engineers
• reliability and quality engineers
• system engineers
• regulatory and safety engineers
• technical managers
• others who need a working knowledge of EMC/EMI principles

PrerequisiteTechnical background or working experience in the field of electronic product manufacturing, testing or development.

Course MethodologyThis course is presented classroom style, with practical demonstration to illustrate the concepts taught. Practical demonstration will be carried out throughout the 3-day course, usually at the end of a related topic. Approximately 10 topics will be demonstrated, depending on availability of equipment and time.

Course Duration3 days, 9am - 5pm

Course StructureDay 1

1) INTRODUCTION

• EMC Examples
• EMC Definition
• EMI Scenario
• EMI Mitigation Methods
• EMC Terms & Acronyms

2) BASIC EMC/EMI THEORIES

• Source Characteristics - spectrum and bandwidth
• Common-mode and differential-mode signals
• Creation of common-mode signals
• High-frequency effects
• Effects of stray L and C
• Conducted Coupling mechanisms
• Radiated Coupling mechanisms
• Antennas and antenna factor
• Transmission line effects

Day 2
3) EMC CONTROL & DESIGN TECHNIQUES

• EMC/EMI matrix
• System partitioning
• Component selection
• EMC/EMI friendly components and technologies
• Circuit Design
• Supply current to digital circuits
• PCB layouts
• Cabling & Connectors
• Filters
• Suppressors
• Isolation
• Shielding
• Grounding & Bonding
• Software

Day 3
4) EMC/EMI TROUBLE SHOOTING TECHNIQUES

• Review of EMC measurement methods
• EMC/EMI trouble shooting tools
• EMC/EMI trouble shooting methods
• Practical examples of EMI identification and mitigation
• Spectrum of a noise source
• Measurement of Conducted & Radiated emissions
• Stray inductance and capacitance
• Effect of bypass capacitors
• Noise on supply and ground tracks
• Transfer impedance of cables
• Magnetic and capacitive coupling and mitigation
• Application of magnetic pickup loops and current probes
• Use of ferrites for EMI control
• EM shielding and grounding
• ESD protective materials