JPS6489309A - Device for clamping transformer core - Google Patents

Abstract

PURPOSE:To reduce the weight and floating loss of yoke clamping fittings and to prevent it from being locally heated by disposing the fittings at a position remotely from a winding at the outside from the heightwise center of a yoke, disposing an insulator plate along the side plate of the fittings, and integrally clamping it with the yoke. CONSTITUTION:Yoke clamping fittings 5 are composed of a clamping fitting side plate 6 for clamping the silicon steel plates of an upper yoke 1, and a widing supporting plate 7 for supporting a winding 4. The side plate 6 is disposed at a position remotely from the winding 4 at the outside from the heightwise center X-X of the yoke. A reinforcing wooden plate 9 is disposed along the upper fittings 5 in a range W not covered with the fittings 5 of the outermost side plate of the yoke, and bound by a stripelike table 10, thereby obtaining a desired yoke stack thickness and holding sufficient clamping force. Thus, the leakage magnetic flux radiation of the fittings 5 is largely reduced, its floating loss is remarkably decreased, thereby entirely eliminating a local heat. Further, the width of the fittings is narrowed to eliminate a conventional magnetic shield, thereby reducing its weight.