公开(公告)号：US11355273B2

公开(公告)日：2022-06-07

申请号：US16492805

申请日：2018-03-07

Applicant: HITACHI ENERGY SWITZERLAND AG

Inventor： Antonio Nogues Barrieras ,  Rafael Murillo ,  Martín Carlos Roy ,  Lorena Cebrian ,  Luis Sanchez Lago

IPC: H01F27/12 ,  H01F27/24 ,  H01F27/28 ,  H01F27/32

Abstract: A non-liquid immersed transformer including a magnetic core having a winding axis and at least two coil windings wound around the magnetic core along the winding axis. One or more cooling tubes made of dielectric material are arranged inside at least one of the coil windings to cool down the coil winding using dielectric fluid flowing through the dielectric cooling tubes. Each cooling tube is wound continuously forming one or more complete loops around the core.