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- TRL (Technology readiness level) -
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- Titre Method for producing a monolithic electromagnetic component and associated monolithic magnetic component
- Description This technology is based on the encapsulation of one or more coils in a ferrite shell. Depending on the design, inductances, transformers or magnetic couplers can be realized. The copper coil has a spiral shape and can be made by different techniques such as chemical etching, laser cutting, water cutting, electro-erosion, etc. Inorganic dielectric is used for insulation of coil(s) and to control the distance between coils.
- Bénéfices The classical transformers made from today’s best commercial power ferrites can reach a power density of 20 W/cm3 at 1MHz. The first experiments with the present invention are already running at 40 W/cm3.
Because of the monolithic nature of the present invention, the thermal transfer from coil to core is strongly facilitated and because of the aspect ratio, thermo transfer from the core to the outside is also facilitated. In addition, these components can be either mounted on a heat sink. Under these conditions we expect to overtake the limit of 100 W/cm3.
Ultimately, such component could be mounted on the base plate of a power semi-conductor device, which is mounted on a heat sink.
- Nouveauté The spectacular development of electrification in aircrafts and automobile produced a strong demand for high power density power-electronics devices. A solution is to increase the switching frequencies of power supplies up to the MHz range owing to new semiconductor devices based in particular on GaN. However, this raised the problem of magnetic components which are not adapted for power integration since they are still built from standard ferrite core and copper wire coils. Various projects in the word try to address this problem (CPES in USA, ECPE in Europe, 3DPHI in France…) but if appreciable progresses have been achieved, no breakthrough technology emerged from these researches. If LTCC technology derived from electronics was successfully applied for this purpose, it remained limited to very small components and thus to limited power.
The present invention is based on a totally new technology allowing to produce fully sintered, all inorganic, noble metal free monolithic magnetic components. This technology is adapted to high temperatures and scalable over 10 cm3.
- Mots clés Monolithic, electromagnetic,component, 2-ACETYL-1-PYRROLINE, flavoring composition
- Secteurs Electronics & Security
