EMC Design Seminar Course Outline
Day 3: Workshop using computer programs designed by the instructors
Note: Wear casual business attire. Prepare for moderate temperature variation in the room.
Day 1
- Introduction to EMC
- Why you need to consider EMC in your design
- The Real World and EMC Test Standards
- FCC and Canadian EMC Requirements
- European EMC Directive
- MIL 461 and RTCA EMC requirements
- Other world EMC regulations
- Real world measurements and levels
- Interference Overview
- Typical Noise Path
- Wavelengths, bandwidths and dB's
- Overview of radiated interference
- Grounding
- Cabling - principles from crosstalk to how shielding works
- Passive components
- Electric and magnetic fields from simple circuits
- Fields radiated by non-sinusoidal sources
- General strategy for low emission product design
5:00-6:30pm Laboratory Tour
Optional tour of a modern EMC test facility
Day 2
- Controlling radiated emissions at the device
- Digital circuit noise and layout
- Control signal return currents on PCB's
- Learn how EMC and signal integrity are interrelated
- Filtering - how filters work and how to design your own using Pspice
- Emission control in motherboards & backplanes
- Hands-on calculations made throughout the day
- Controlling radiated & conducted emissions from switch mode power supplies
- Reducing emissions from cables and packaging
- Calculating emissions for a digital circuit
- Shielding
- Calculation of emissions from enclosures
Current density at 1 MHz from source to load
Current changing planes using two capactiors
Day 3
- Troubleshooting radiated & conducted emissions
- Electrostatic Discharge (ESD)
- Case study and validation of results
- The Workshop
Using an example of a real life product and following typical design principles, students will: - Develop a block diagram
- Determine the product's EMC parameters
- Using our proprietary computer programs (a copy of which you will take home) calculate the probable emissions characteristics of the:
- circuit boards
- power supply
- I/O lines
- enclosure
While meeting the North American and European EMC regulations, students will design/analyze a unit consisting of:
- A motherboard with microprocessor, clocks, digital inputs and outputs
- A power supply
- Cables with and without shielding for the digital and analog inputs and outputs
- An enclosure
- An external keyboard
- An interface to a video monitor
Students will go through the product's requirements and calculate its estimated emissions providing rationale for various decisions.
When you leave this seminar/workshop, you should be ready to lead a design team with a high degree of confidence that your products will meet their EMC requirements.
Included with the seminar/workshop:
- A large workbook of the slides used in class
- Worksheets to do the calculations
- Computer software to calculate harmonics emissions from PCB, cable emissions & cabinet shielding
- Textbook Design Techniques for Controlling Radiated Emissions - 2nd edition
- Specific sample problems and calculations
- Lunch each day
What to bring:
- Your desire to learn
- Calculator
- A laptop running Word, Adobe Acrobat, Excel and a CD/DVD drive. (A laptop is useful, but not required)
