Investigation & EMC tuning

Goals

formation-objectifs-seointro Investigation & EMC tuning :

Acquire investigation methods associated with specific tests in order to identify problems and be able to size and implement appropriate protective measures.

The aim of this training course is to:

Program

1 - Introduction

• EMC analysis method

• EMC organisation of a project

• EMC regulatory requirements

• EMC standards

• Organisation of EMC testing



2 – Reminders - Couplage

• Time-frequency relationship

• Frequency representation

• EMC behaviour of components

• Common mode and differential mode

• The 6 coupling modes



3 - Solutions

• The different LF and HF filtering elements

• Implementation of filtering

• Common mode inductance

• The main surge arresters

• The reducing effect of a shielded cable

• Equipment shielding

• Influence of openings in shielding



4 - Conducted emissions

• Test configuration: civil and military standards

• Origin of differential mode and common mode

• Differential mode and common mode filtering

• Use of the MC/MD separator

• Practical demonstration: Highlighting parameters

• Practical demonstration: Influence of filtering elements



5 - Radiated emissions

• Spectrum of a trapezoidal train

• Radiated spectrum in MC and MD

• Identification of radiated spectra

• Origins of radiation

• Radiation reduction

• Radiated emission tuning

• Radiated emission evaluation

• Use of current clamps in radiated emission

• Moebius probe

• Practical demonstrations



6 - RF conducted immunity

• Pulse shape

• IEC/EN 61000-4-4 standard

• IEC/EN 61000-4-6 standard

• Conducted immunity tools

• Additive method and subtractive method

• Practical work: equipment tuning

• Conducted immunity tuning guide



7 - Radiated immunity

• IEC/EN 61000-4-3 standard

• Walkie-talkie immunity

• Shielding resonance

• Radiated immunity development guide



8 – Electrostatic discharges

• Personal discharges

• IEC 61000-4-2 standard

• DES test application



9 - Conclusion

• General development method

• Prequalification tools: summary

• Form