Epoxy pouring dry-type transformer winding capable of improving cracking resistance

• Main Authors: XU PEIJIAN, PAN ZHENBIN, GUO XIUHUA, FANG YUESHENG, GUAN HAIPING, WANG HUI
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

The invention discloses an epoxy pouring dry-type transformer winding capable of improving anti-cracking capability. The transformer winding comprises a plurality of layers of coils which are sequentially arranged from inside to outside, grids are sequentially arranged between two adjacent layers of coils, epoxy resin is poured in gaps and peripheries of the coils, and the epoxy pouring dry-type transformer winding is characterized in that a first elastic insulating layer is arranged between at least two adjacent layers of coils. The poxy pouring dry-type transformer winding has the advantages that when the temperature of the winding rises, a copper wire is heated and expanded to extrude the first elastic insulating layer, that is, the first elastic insulating layer provides a space for the expansion of the copper wire, so that the extrusion on the epoxy resin pouring layer is reduced or even avoided, and the anti-cracking capability of the winding is improved. 本发明公开了一种提高抗开裂能力的环氧浇注干式变压器绕组，包括多层从内到外依次设置的线圈，相邻的两