Transformer having bow loop in tubular winding

Details Transformer having bow loop in tubular winding Transformer having bow loop in tubular winding

1984-09-24

1986-04-22

Kozma, Thomas J.

Inductor devices

With temperature modifier

Heat exchanging surfaces

336 62, 336 96, 336183, H01F 2708

Patent

active

045845514

ABSTRACT:
A transformer comprising a core, a primary winding and a secondary winding in which one of the windings, preferably the winding with the least coils, is formed from a tubular member formed in a plurality of coils; in the preferred embodiment of a step down transformer, the secondary winding is formed from a tubular member. A connector block at each end of the secondary winding includes an appropriate fluid passage and means for connecting a fluid coupling to the block so that the inlet and outlet of the fluid circulation system can be secured to the tubular member forming the secondary winding. The loops of the primary coil are interdigitally arranged with the loops of the secondary coil so that the fluid in the secondary coil absorbs heat from both the primary and secondary windings. Each loop of the secondary includes a bow so that adjacent ends of each loop of the primary are sandwiched between the bows. Preferably, the core is made of laminated sections, each laminated section comprising a substantially E-shaped portion, the legs of each E-shaped portion abutting against the legs of the other E-shaped portion in each laminate layer. The primary and secondary coils are wrapped around the center leg of the core.

REFERENCES:
patent: 646500 (1900-04-01), Moody
patent: 1394044 (1921-10-01), Stephens
patent: 1449206 (1923-03-01), Weed
patent: 1471096 (1923-10-01), Brand
patent: 2170700 (1939-08-01), Von Henke
patent: 2817066 (1957-12-01), Scanpa
patent: 3074009 (1963-01-01), Dunnabeck et al.
patent: 3144627 (1964-08-01), Dunnabeck et al.
patent: 3503026 (1970-03-01), Geisel et al.
patent: 3728655 (1973-04-01), Reinke
Finke, "Miniature Laminated Cores of Improved Permeability for Low Frequency Transformers and Reactors," Wescom Technical Papers, Aug. 20-23, 1968, pp. 1-8.

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