Toroidal resistance welding transformer

Details Toroidal resistance welding transformer Toroidal resistance welding transformer

1975-09-08

1977-05-17

Truhe, J. V.

Electric heating

Metal heating

For bonding with pressure

336229, B23K 1110, H01F 2728

Patent

active

040243702

ABSTRACT:
A transformer for application in portable resistance welding machines assembled from toroidal sections of iron core, primary and secondary windings arranged concentrically one with another. The primary is constructed from copper plate modules so as to form a continuous single layer winding of toroidal form in which the separate modules are electron-beam welded one to another in order to form the continuous primary winding. A single turn secondary completely encloses the primary winding and iron core so as to form a compact cylindrical electrical transformer structure. A liquid electrical insulating material is sealed within narrow gaps between iron core, primary winding and secondary winding to allow good thermal transfer from these elements to a cooling medium and at the same time stabilize the relative position of these elements against the dynamic forces developed by the high currents passing through the secondary.

REFERENCES:
patent: 2269726 (1942-01-01), Martin
patent: 2644067 (1953-06-01), Watson
patent: 3040162 (1962-06-01), Hunter
patent: 3201728 (1965-08-01), McWhirter
patent: 3564708 (1971-02-01), Harris
patent: 3629759 (1971-12-01), Douglas et al.
patent: 3697914 (1972-10-01), Khrenov et al.

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