公开(公告)号：US11451089B2

公开(公告)日：2022-09-20

申请号：US16408048

申请日：2019-05-09

Applicant: Oticon A/S

Inventor： Alessandro De Masi ,  Lars Pinnerup Frederiksen ,  Jens Troelsen ,  Lars Riemer

IPC: H02J7/00 ,  H02J50/10 ,  H01F27/28 ,  H01Q1/24 ,  H02J7/02 ,  H01F27/36

Abstract: A charger for charging a device to be inductively charged is described, comprising an excitation coil made of an electrical conductor wound around a toroidal core to excite a magnetic field inside the toroidal core, the toroidal core having an air-gap between two end-faces of the toroidal core, wherein the two end-faces are facing each other, and the winding density of the excitation coil along the toroidal length of the toroidal core is higher in the vicinity of the respective end-faces as compared to the remaining parts of the toroidal core.