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Adjustable Ferroresonant Regulator

IP.com Disclosure Number: IPCOM000090819D
Original Publication Date: 1969-Jul-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Glockler, JA: AUTHOR [+2]

Abstract

The transformer in a ferroresonant regulator determines the output voltage, and therefore tolerance requirements in this element can present a manufacturing problem. However, by providing a mechanical adjustment in the saturating portion of the magnetic circuit, production tolerances can be relaxed and closer output tolerance requirements can be met. Also, the adjustment can provide a range of operating ratings to adapt a given transformer to differing requirements.

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Adjustable Ferroresonant Regulator

The transformer in a ferroresonant regulator determines the output voltage, and therefore tolerance requirements in this element can present a manufacturing problem. However, by providing a mechanical adjustment in the saturating portion of the magnetic circuit, production tolerances can be relaxed and closer output tolerance requirements can be met. Also, the adjustment can provide a range of operating ratings to adapt a given transformer to differing requirements.

The mechanical adjustment changes the limiting cross-section of magnetic path 10 which couples the secondary output winding 12 of the transformer, thus changing the flux available at saturation. This is accomplished by boring a hole 14 through laminations 15 in this region of the magnetic circuit and providing slug 16 which is adjustably positioned in hole 14 to vary its effective depth. Hole 14 is provided in a return path of the secondary flux circuit, outside of the secondary coil. This location lends itself to an arrangement which is easily adjusted. Slug 16 is made up of laminations mounted by a threaded stem portion 18 engaging a threaded hole in transformer frame 20. Lock nut 22 holds slug 16 in adjusted position. By threading slug 16 into or out of hole 14, the effective cross-section of saturating leg 10 of the core can be altered.

The material for the laminations of slug 16 is the same as used for the transformer core laminations. The modification of the la...