Patent ID: 10629355

Abstract:
A stationary induction apparatus includes a cooled magnetic material ring disposed in an end portion of each winding and that can reduce an electromagnetic-mechanical force and improve reliability. The apparatus includes an iron core; a winding outside of the iron core; a plurality of iron core clamps that sandwich the winding from a longitudinal direction of the iron core; a magnetic material ring with a silicon steel plate wound outside of the iron core; a laminated magnetic material composite ring including an insulator on an outer circumference of the magnetic material ring; and a holding-and-cooling structure between the winding and the laminated magnetic material composite ring, in which a portion of the holding-and-cooling structure protruding from between the winding and the laminated magnetic material composite ring extends in the longitudinal direction, and the holding-and-cooling structure is a recess with respect to the winding and the laminated magnetic material composite ring.