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EMC for Product Designers, 4th edition

Williams

2007

512 pages

Widely regarded as the standard text on EMC, Tim Williams' book provides all the information necessary to meet the requirements of the EMC Directive. Most importantly, it shows how to incorporate EMC design principles into products, avoiding cost and performance penalties, meeting the needs of specific standards and resulting in a better overall product.

This edition covers basic, generic and product-specific test standards, the latest standards on measurement methods and revisions to existing standards. Changes to the standards generating process are also covered. New measurement techniques are described. The chapter entitled Systems EMC explains requirements on systems design, layout of large systems, earthing, grounding and bonding practices, cable layout, routing and termination, and specification of components. A further chapter deals with EMC Management: discussion of management requirements, company policy, QA needs, the role of the EMC coordinator, including test and control plans. Tim Williams has worked for a variety of companies as an electronic design engineer over the last 20 years. He has monitored the progress of the EMC Directive and its associated standards since it was first made public. He is a member of the Institution of Electrical Engineers and now runs his own consultancy, specializing in EMC design and training. He is also the author of 'The Circuit Designer's Companion' published by Butterworth-Heinemann.

Contents
Contents
Preface
 
Part 1: The Directive, Standards and Testing
 
Chapter 1 Introduction
What is EMC?
Compatibility between systems
The scope of EMC
The compatibility gap
The EMC Directive
The new approach directives
Background to the legislation
Scope, requirements and exceptions
The CE mark and the declaration of conformity
Manufacturing yuality assessment
Systems and installations
Implementation, enforcement and sanctions
Compliance with the Directive
Self certification The technical construction file
The transition period
Telecomms terminal and satellite ea:rth station equipment radio transmitters
Testing and the competent body
Standards
Action for compliance
 
Chapter 2 Standards
The standards making bodies
The International Electro technical Commission
CENELEC
Basic and generic standards - emissions
EN 50 ()81 part 1: 1992*
EN 50 081 part 2: 1993*
EN 55 011: 1991 *
EN 55 014: 1993*
EN 55 022: 1994*
Generic standards-immunity
EN 50 082 part I: 1992 *
EN 50 082 part 2: 1995*
Basic standards - IEC 1000
IEC 1000-3
IEC 1000-4
Product standards
EN 55 013: 1990*
EN 55 015: 1993*
EN 55 020: 1933
EN 55 104: 1995*
EN 50 065-1: 1991 *
EN 60 601-1-2: 1993*
EN 60 945: 1993*
ETS 300 127: 1994 pr
ETS 300 339
Automotive standards
Other product standards in development
Other standards not related to the EMC Directive
FCC Rules
German standards
Other nonharmonized standards
RF emissions limits
 
Chapter 3 EMC measurements
RF emissions
Measurement instrumentation
Transducers
Facilities
Test methods
Sources of uncertainty
RF immunity
Equipment
Facilities
Test methods
Conducted RF immunity
ESD and transient immunity
ESD
Transients
Sources of uncertainty
Evaluation of results
Performance criteria
Mains harmonic emission
Equipment
Test conditions
 
Part 2: Design Principles
 
Chapter 4 Interference coupling mechanisms
Source and victim
Common impedance coupling
Mains coupling
Radiated coupling
Coupling modes
Emissions
Radiated emissions
Conducted emissions
Susceptibility
Radiated field
Transients
Electrostatic discharge
Magnetic fields
Supply voltage phenomena
Mains harmonics
The supplier's problem
Non-linear loads
 
Chapter 5 Layout and grounding
Equipment layout and grounding
System partitioning
Grounding
Ground systems
Grounding and layout of large systems
PCB layout
Ground layout without a ground plane
Ground plane
Loop area
Configuring 1/0 grounds
Rules for PCB layout
 
Chapter 6 Digital and analogue circuit design
Design for emissions control
The Fourier spectrum
Radiation from logic circuits
Digital circuit decoupling
Analogue circuits: emissions
The switching power supply
Design for immunity
Digital circuits: interference paths
Logic noise immunity
The microprocessor watchdog
Defensive programming
Transient and RF immunity: analogue circuits
Chapter 7 Interfaces, filtering and shielding
Cables and connectors
Cable segregation and returns
Cable screens at low frequencies
Cable screens at RF
Types of cable screen
Screened cable connections
Unscreened cables
Filtering and suppression
Filter configuration
Components
Mains filters
I/O filtering
Transient suppression
Contact suppression
Shielding
Shielding theory
LF magnetic fields
The effect of apertures
The image plane
Enclosure resonance
Shielding hardware
 
Chapter 8 EMC management
Managing the EMC process
Putting EMC in context
The EMC co-ordinator
Control plan
The purpose of the control plan
Contents
Test plan
The need for a test plan
Contents
Test and calibration procedures
Susceptibility criteria
Production QA testing
 
Appendix A Design checklist
 
Appendix B CAD for EMC
Overview
Available packages
Circuit CAD
 
Appendix C Useful tables and formulae
The deciBel
Antennas
Fields
Shielding
Capacitance, inductance and pcb layout
Filters
Fourier series
 
Appendix D The EU and EEA countries
The European Union
The European Economic Area
 
Glossary
Bibliography
Index