Patent ID: 11870307
Assignee: UNIVERSITAT STUTTGART
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. An energy transfer device for the contactless conversion of electrical energy into electrical energy with the aid of a magnetic field in order to electrically excite a rotor of an electrical machine, comprising:
an electrically conductive material layer that is arranged on at least one active part of the energy transfer device,
wherein an active part of the energy transfer device is a part of the energy transfer device which is at least partially exposed to the magnetic field used for energy transfer,
wherein the electrical conductivity of the electrically conductive material layer is greater than the electrical conductivity of the at least one active part, and
wherein a layer thickness of the arranged electrically conductive material layer corresponds to at least a penetration depth (δ) into the material of the electrically conductive material layer, caused by the skin effect, at a predetermined frequency of the magnetic field used for energy transfer.