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Home   /   Thesis   /   Electromagnetic compatibility converter optimization with wide band gap devices for frequency increase

Electromagnetic compatibility converter optimization with wide band gap devices for frequency increase

Electronics and microelectronics - Optoelectronics Energy efficiency for smart buildings, electrical mobility and industrial processes Engineering sciences Technological challenges


Power Electronics systems aims at converting one shape of Energy into another. From very low power, such as USB power delivery (hundreds of watts) to high power, like electric vehicle drivetrain (hundreds of kW, power scale is large. Power Electronics systems are everywhere, this is why such systems must be optimized to be efficient, compact, profitable and with an optimized environmental footprint.
The emergence of "wide bandgap components" (WBG) revolutionize the efficiency of power converters along with their power density. However, WBG components generate more disturbances in the grid, and could possibly affect even degrade the operation of systems in the immediate environment. There are standards to regulate the amount of disturbances allowed to go outside of the converter environment. The committee in charge of the electromagnetic compatibility aspect is called "the International Special Committee on Radio Interference" (CISPR).
On the contrary, filtering technologies did not evolve as fast as WBG components and the main difficulty today to turn a proof of concept into an industrial product is to meet the electromagnetic compatibility standards.

The objectives of the PhD are the followings:
- Topology Study of different types of filter (passive and active)
- Study and characterization of magnetic material, their design,, efficiency in function of the frequency etc.
- Propose filtering solutions (materials, integration, modulation etc.)
- Skills improvement on EMC modelling with a given "use case", and take into account, parasitic elements, couplings by radiation along with material performances.

The PhD should give answer about frequency increase, depending on the use case, based on WBG components and relevancy of such technology on applications with strong constraints (EMC, cost, volume, and efficiency).

This PhD will take place at CEA Grenoble, in the System Department, in the laboratory of Electronics for power and Energy. CEA environment is very transversal; the candidate will be able to feed his researches with engineers from the system department. The candidate, after electrical habilitation, will have access to the laboratories of power Electronics to make his experimental testing.

The candidate must have skills in power Electronics, in particular the topologies of power converter, components (active and passive) and attractions for modelling complex systems thanks to finite elements software and experimental testing. The candidate must have analytical and critical skills and propose scientific experiment during the PhD.


Département Systèmes (LETI)
Service Systèmes de Capteurs, électroniques pour l’Energie
Laboratoire Electronique Energie et Puissance
Grenoble INP
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