Investigation & EMC tuning

Goals

The objectives of the training 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:

• Know how to define the objectives to be achieved in order to comply with EMC tests


• Be able to analyse and identify non-compliance with EMC tests


• Be able to adapt investigation methods according to the problems encountered


• Master EMC solutions and their implementation


• Be able to implement your own diagnostic tools

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