公开(公告)号：US11049645B2

公开(公告)日：2021-06-29

申请号：US16502258

申请日：2019-07-03

Applicant: ABB Power Grids Switzerland AG

Inventor： Ye Xu ,  Yong Wang ,  Qiongfang Lu ,  Wenhao Li

IPC: H01F27/08 ,  H01F27/28 ,  H01F27/24 ,  H01F27/32

Abstract: A transformer is disclosed. The transformer includes a first coil including a first stack of wire disks stacked in a first direction; an exterior barrier arranged to form a first air gap between outer sides of the wire disks of the first stack of wire disks and the exterior barrier; an interior barrier arranged to form a second air gap between inner sides of the wire disks of the first stack of wire disks and the interior barrier; a wind generator arranged to generate an air flow in the first direction; a core in the form of a cylinder that is surrounded by the first coil; and an air guiding plate fixed to one of the exterior barrier and the interior barrier, to guide the air flow in a second direction along first stack gaps between the wire disks of the first stack of wire disks. The transformer effectively improves the heat dissipation of the coil and thus allows a smaller transformer in size.