Sheet-wound transformer coils with reduced edge heating

Details Sheet-wound transformer coils with reduced edge heating Sheet-wound transformer coils with reduced edge heating

1975-12-08

1977-05-03

Kozma, Thomas J.

Inductor devices

With electric and/or magnetic shielding means

336212, 336223, H01F 1504

Patent

active

040217647

ABSTRACT:
In sheet-wound transformer coils, excessive ohmic losses due to high current density at the sheet edges caused by a radial magnetic leakage field are avoided by adding ferrite ceramic disks, or disks and strips, adjacent each axial end of the coils, to lead magnetic leakage flux axially out of the sheet metal windings.

REFERENCES:
patent: 1335837 (1920-04-01), Jacobson
patent: 2850707 (1958-09-01), Wroblewski et al.
patent: 2907965 (1959-10-01), Mercier
patent: 2962679 (1960-11-01), Stratton
patent: 3014189 (1961-12-01), MacKinnon et al.
patent: 3366907 (1968-01-01), Tipton
patent: 3609613 (1971-09-01), Horn et al.
patent: 3663910 (1972-05-01), Grubb
patent: 3750070 (1973-07-01), Rissinger

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