Product Design for EMC - Southampton, New Place Hotel, Tuesday, 20. October 2020

This course will cover design to meet the compliance requirements of the European EMC Directive, as well as other commercial and military requirements. Good EMC design gives you a product that is more reliable and better fitted for its environment. The course is structured to achieve the maximum learning potential from a combination of tutorial and case study exercises. It emphasises the underlying physics of interference generation and coupling and how it affects design methods, without resorting to complex mathematics.
Who should attend
Electronic product designers and design managers: a basic knowledge of electronics is assumed. The course will be of particular interest to design engineers in industrial, medical, transport, telecomms, IT, consumer, marine and military sectors who have to meet EMC requirements as part of their project specification. It will help them deal with the technical and compliance aspects of EMC, as well as avoiding EMC-related design mistakes that disrupt project timescales and budgets.
         Day 1 

Introduction to electromagnetic compatibility: Definition of EMC, emissions and immunity, EMC and the product cycle,  reliability aspects of EMC, the decibel, interference in the time and frequency domain, coupling mechanisms, electromagnetic fields, near and far fields, differential and common mode cable coupling

EU and other regulations: EMC Directive 2014/30/EU, UK Regulations SI 2016 No. 1091, apparatus and fixed installation, excluded equipment, ANNEX II Internal Production Control, ANNEX III EU Type Examination, harmonised standards, EMC assessment, technical documentation, Notified Body, Declaration of Conformity, CE Marking, fixed installation essential requirements, other EU Directives and EMC, Radio Equipment Directive, Low Voltage Directive, Machinery Directive, Medical Equipment Directives. Technical Documentation exercise

Automotive, Marine and Avionics Regulations:  Automotive regulations and standards, Marine Equipment Directive and standard, aerospace standards in US and EU.

Military Specifications: Military requirements UK, US and NATO, particular requirements of military environments, CE Marking and military equipment.

Functional Safety Considerations: Electromagnetic resilience and safety requirements, product safety regulations, standards and guidance, functional safety process, immunity testing and safety.

Test Standards: The commercial standards generating bodies, application of standards, the three types: product/generic/basic standards, CISPR emission standards, CISPR32/EN 55032: MME mission, CISPR35/EN 55035: MME immunity, IEC 61000-4 series basic immunity standards. Harmonised standards exercise

EMC Documentation:  Test planning, test plan documents, preparation for test, test reports.

EMC Testing: Conducted and radiated emissions, harmonics and flicker, conducted and radiated immunity, magnetic field immunity, transient immunity, dips and interrupts, in-situ testing.Day 2 - electro-mechanical aspects

 PCB layout, coupling and grounding: Grounding and the local ground structure, electric, magnetic and common impedance coupling, identifying the current return path, track impedance, use of ground mesh and ground plane, consequences of multiple ground planes, edge effects and layer stack, interface layout, connecting to surrounding metalwork, application of heatsinks.

Cables and connectors: Unscreened cables: twisted pair, ribbon, transmission line resonances in common mode, screened cables: low versus high frequency effects, screen grounding, transfer impedance, the problem of the pigtail, best practice screen termination, layout within an enclosure.

Shielding: Shielding theory, effect of practical constraints, apertures, resonances, penetrations, use of conductive gaskets, bonding, shielded windows and conductive coatings, zoning, installation and maintenance.

case study exercise: Example of product in a metal box:  delegates to discuss how it could be improved.
Day 3 – Electronic aspects
• Filtering and suppression: Filter configuration, component imperfections, ferrite components, I/O filtering, mains filtering, filter layout and the importance of the filter ground, transient and contact suppression.

Emissions from power switching circuits: Mains conducted emissions equivalent circuit, capacitive coupling, magnetic coupling, identifying component parasitics, DC-DC converters, output noise, use of snubbers.

Digital and analogue circuit design: Digital emissions,  clock selection, distribution and buffering, decoupling requirements and analysis; digital immunity: RF susceptibility, transient susceptibility, the watchdog, defensive software; analogue immunity: audio rectification, instability, non-linearity of response, circuit design techniques

Case study exercise:  Multi-line interface example schematic: delegates to discuss necessary versus unnecesary components


Tuesday, 20. October 2020, New Place Hotel, Product Design for EMC - Southampton

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