公开(公告)号：US4521954A

公开(公告)日：1985-06-11

申请号：US512735

申请日：1983-07-11

申请人： Leo C. Rademaker ,  Philip J. Hopkinson ,  Gordon M. Bell ,  Noah D. Hay

发明人： Leo C. Rademaker ,  Philip J. Hopkinson ,  Gordon M. Bell ,  Noah D. Hay

IPC分类号： H01F27/08 ,  H01F41/04 ,  H01F41/06

CPC分类号： H01F41/04 ,  H01F27/085 ,  H01F2027/328 ,  Y10T29/49071 ,  Y10T29/49073

摘要： A dry type, air cooled transformer having a mitered magnetic core and a compression bonded coil. In the disclosed embodiment, the magnetic core comprises a plurality of stacked lamination layers wherein each layer comprises a plurality of grain-oriented laminations wherein the ends of most of the laminations are mitered thereby resulting in joints between the leg and yoke pieces oriented at an angle to the favored magnetic directions of the adjoining laminations. The coil on each of the core legs is generally rectangular in shape and comprises a plurality of layers of wound conductor with the conductor layers in the end portions of the coil being spaced apart to form a plurality of air ducts for the passage of cooling air therethrough. The conductor layers in each of the side portions of the coil are compressed and then bonded together in their compressed state by means of a heat cured adhesive coated on opposite sides of the sheets of insulation between adjacent layers. This compression bonding of the coil sides squares up the inner and outer surfaces of the coil so as to improve the coil and core space factors thereby allowing a smaller core. Conversely, compression bonding allows higher output power ratings to be achieved by packing added conductor material through the same size core window. The compression bonding of the coil also permits duct spacers in the corners of the end ducts to be eliminated so that the duct spacing can be achieved by a single duct spacer located in the center portion of each duct thereby resulting in better conduction of heat from the coil sides to the ducted end portions of the coil.

摘要翻译： 干式风冷变压器，其具有倾斜磁芯和压接线圈。 在所公开的实施例中，磁芯包括多个堆叠层压层，其中每个层包括多个晶粒取向叠片，其中大部分叠片的端部倾斜，由此导致腿和轭片之间的接合部以一定角度 到毗邻叠片的有利磁方向。 每个芯腿上的线圈通常是矩形的，并且包括多个缠绕导体层，线圈的端部中的导体层间隔开以形成多个用于使冷却空气通过的空气管道 。 线圈的每个侧部中的导体层被压缩，然后通过涂覆在相邻层之间的绝缘层的相对侧上的热固化粘合剂以其压缩状态粘合在一起。 线圈侧的这种压接会在线圈的内表面和外表面之间形成正方形，从而改善线圈和芯空间因素，从而允许较小的芯。 相反，压接可以通过在相同尺寸的核心窗中包装添加的导体材料来实现更高的输出功率额定值。 线圈的压接也可以消除末端管道角落中的管道隔离物，使得管道间隔可以通过位于每个管道的中心部分中的单个管道隔离件来实现，从而导致较好的热传导 线圈侧到线圈的导管端部。