Electromagnetic compatibility. Fundamental concepts

The purpose of this article is to provide a reminder of fundamental EMC concepts, which can be used in all articles dealing with project EMC. Cross-references are made when concepts are similar to those covered in the Electromagnetism for Engineers course. The focus here is on concepts more specific to the electromagnetic compatibility profession. First, we look at the principles that apply to conducted interactions or close field interactions (electrostatic, magnetostatic interactions). Then we look at guided or radiated wave interactions. A calculation method known as "Kron's method" is presented in paragraph 3, which enables many problems to be calculated quickly and very efficiently. This method will enable any engineer to evaluate already complex EMC problems that would be impossible, or very difficult, to calculate using commercially available tools. As the method is used in various paragraphs as an example and exercise aid, we present it first. Finally, we'll look at the effects of particles on components and the EMC approach to them. It's important to distinguish between the exercise of simulating an EMC problem, using numerical schemes based on meshes and thus creating virtual experiments, and the exercise of theoretically analyzing the problem, based on an engineer's description of the system being treated. The notion of demonstration relates to the agreement between a theoretical prediction and an experiment, whether real or virtual, as long as the schemes used in the virtual experiment are in line with the precision and relevance sought in relation to the real problem and the control we have of its parameters and physical phenomena.