Low cost and manufacturable transformer meeting safety requireme

Details Low cost and manufacturable transformer meeting safety requireme Low cost and manufacturable transformer meeting safety requireme

1996-01-19

1998-09-29

Kozma, Thomas J.

Inductor devices

Winding with terminals, taps, or coil conductor end...

336198, 336206, H01F 2729, H01F 2730

Patent

active

058150617

ABSTRACT:
A transformer bobbin has margining ledges disposed on either side of a primary winding surface such that a primary wire is wound between margining surfaces of the margining ledges. L-shaped grooves extend into the margining ledges and then parallel to the primary winding surface to accommodate the primary wire ends that connect to terminals of the bobbin. Margining of the secondary is accomplished with a pair of margining bibs which attach to the bobbin after the primary is wound and after a layer of insulation is placed over the primary. The secondary is wound over the insulation layer between margining surfaces of the bibs. With the margining ledges and bibs, required creepage distances can be maintained without the use of sleeving, margining tape, interlayer tape or holding tape.

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Underwriters Laboratories, Inc. Standard UL 1950 for Safety of Information Technology Equipment, Including Electrical Business Equipment, Feb. 26, 1993, pp. 1-10, 19-30, 49-76, (second edition).

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