公开(公告)号：US11501913B2

公开(公告)日：2022-11-15

申请号：US16142839

申请日：2018-09-26

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Stig Lund Pallesgaard

IPC: H01F17/04 ,  H01F27/34 ,  H01F27/32 ,  H01F17/06 ,  H01F27/24 ,  H01F19/08 ,  H03K17/16 ,  H01F27/38 ,  H03K17/691 ,  H01F38/00

Abstract: A gatedriver circuit for controlling a power electronic switch. The circuit provides a galvanic separation and is magnetically immune. The gatedriver circuit comprises a transformer arranged with two separate cores of magnetically conductive material each forming a closed loop. A first electrical conductor has windings around a part of both cores, and a second electrical conductor also has windings around part of both cores. The two cores are positioned close to each other to allow mutual magnetic interaction. The windings of the first and second electrical conductors around the first core have the same winding direction, and the windings of the first and second electrical conductors around the second core have opposite winding direction of the windings of the first and second electrical conductors around the first core, so as to counteract electric influence induced by a common magnetic field through the closed loops of the first and second cores. Hereby, such gatedriver circuit is suitable for controlling power switches in environments with strong magnetic fields, e.g. inside a high power wind turbine.