Foil coil for transformer

The invention discloses a foil coil for a transformer. The foil coil comprises a round coil barrel, two insulation layers ad an inflaming retarding layer, an inner coil and an outer coil are wound around the outside of the round coil barrel, and the inner coil and the outer coil are filled with heat radiation particles. The two insulation layers are arranged on the two sides of the outer coil respectively, and a plurality of supporting bars and a plurality of micropores are arranged in the insulation layers. The inflaming retarding layer is arranged on the outer wall of the outermost insulation layer. In this way, according to the foil coil for the transformer, the inner coil and the outer coil of the foil coil are filled with the heat radiation particles, so that the heat radiation performance of the coil of the transformer is greatly improved, the reliability of the transformer can be effectively improved, the continuous work time duration of the transformer can be effectively prolonged, the structure is si