EMC Considerations in Switching Power Supply Design

This one-day seminar covers radiated and conducted emission problems associated with the design of switching power supplies. Electric and Magnetic field coupling mechanisms are developed. Models are developed for the various emission sources, both radiated and conducted, and the methods of emission control are discussed. A graphical approach to power line filter design is presented and explained. Troubleshooting procedures and EMC requirements are also covered.

Outline

CABLING

Electric Field Coupling
Magnetic Field Coupling
Crosstalk
Cable types
Shield Terminations

RADIATED EMISSION MODELING

Radiation Mechanisms
Differential-Mode Emission
Common-Mode Emission
Methods of Controlling Radiated Emission

CONDUCTED EMISSION MODELING

Emission Sources
Common-Mode Conducted Emission
Differential-Mode Conducted Emission
Controlling Conducted Emission
Power Line Filters
Common-Mode Chokes
Leakage Inductance
Power Supply Noise Sources
Digital Logic Noise Sources

POWER LINE FILTER DESIGN

Filter Attenuation
Graphical Attenuation Method
Advantages of Graphical Design
Common-Mode Filter Design Example

TROUBLESHOOTING CONDUCTED EMISSION PROBLEMS

Measurement & Diagnostic Procedures
Differential Vs. Common Mode
Saturation

WORLDWIDE EMC REQUIREMENTS

European Union Immunity Standards
Transient Immunity
Harmonics & Flicker

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Henry Ott Consultants

48 Baker Road Livingston, NJ 07039

Phone: 973-992-1793, FAX: 973-533-1442

e-mail: h.ott@att.net

June 26, 2001