Three phase transformer with frame shaped winding assemblies
First Claim
1. Three phase transformer comprising three substantially identical frame shaped winding assemblies, each containing low voltage and high voltage windings insulated between each other, and forming together half legs of substantially semi-circular cross section, said winding assemblies being placed together to form a triangular structure wherein the half legs of adjacent assemblies combine into three legs of substantially circular cross section, said winding assemblies being interlinked by three hollow, cylindrical cores wound from ferromagnetic strip material, each core surrounding one of said substantially circular legs and wherein each winding assembly contains said low voltage winding having rectangular turns of uniform width, with each turn placed upon the previous turn in a staggered fashion to form together a rhombordly shaped part section, and said high voltage winding wound several turns to a layer, the layers being of varying width and offset mutually to form an offset part section, said rhomboidly shaped part section and said offset part section forming said semi-circular cross section of each of said half legs.
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Abstract
A three phase transformer, e.g. a distribution transformer comprising three, substantially identical, frame shaped winding assemblies each containing primary and secondary windings which together form half legs having substantially semicircular cross section. The winding assemblies are placed together to form a triangular structure, so called temple configuration, wherein the half legs of adjacent winding assemblies combine into three legs having substantially circular cross section. A magnetic circuit is formed around each leg by winding a continuous strip of a ferromagnetic sheet material around the leg.
33 Citations
5 Claims
- 1. Three phase transformer comprising three substantially identical frame shaped winding assemblies, each containing low voltage and high voltage windings insulated between each other, and forming together half legs of substantially semi-circular cross section, said winding assemblies being placed together to form a triangular structure wherein the half legs of adjacent assemblies combine into three legs of substantially circular cross section, said winding assemblies being interlinked by three hollow, cylindrical cores wound from ferromagnetic strip material, each core surrounding one of said substantially circular legs and wherein each winding assembly contains said low voltage winding having rectangular turns of uniform width, with each turn placed upon the previous turn in a staggered fashion to form together a rhombordly shaped part section, and said high voltage winding wound several turns to a layer, the layers being of varying width and offset mutually to form an offset part section, said rhomboidly shaped part section and said offset part section forming said semi-circular cross section of each of said half legs.
Specification