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Adjustable Ferroresonant Regulator

IP.com Disclosure Number: IPCOM000090820D
Original Publication Date: 1969-Jul-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Hart, BE: AUTHOR

Abstract

The output of a ferroresonant regulator can be adjusted to compensate for manufacturing tolerances and for variations in losses due to load service changes by altering the saturation characteristics of the portion of the magnetic circuit coupling the secondary windings.

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Adjustable Ferroresonant Regulator

The output of a ferroresonant regulator can be adjusted to compensate for manufacturing tolerances and for variations in losses due to load service changes by altering the saturation characteristics of the portion of the magnetic circuit coupling the secondary windings.

The transformer is has E and I laminations 10 and 12. Center leg 14 mounts primary winding 16 and one or more secondary windings 18 and 20. As is usual in ferroresonant regulators, one secondary winding can be connected to the load and the other can be connected to a resonating capacitor, not shown, which imparts waveshape improvement to the output. Magnetic shunts 22 and 24 having air gaps 26 and 23 provide a return path for that portion of the primary flux which does not link the secondary windings. The portion of the primary flux which does link the secondary windings and therefore provides the output is coupled to the secondary windings by center leg 14. This is bifurcated by central notch 30 which reduces the effective cross-section of that leg. Mounted within notch 30 are wedges 32 and 34 composed of laminations of the same magnetic material as utilized in the remainder of core structure 10 and 12. Wedges 32 and 34 are adjustable into and out of notch 30 by set screw 36 threadedly engaged in transformer frame 38 and held in adjusted position by lock nut 40. Wedges 32 and 34 are urged into engagement with the sides of notch 30 by compression spring 42.

When set screw 36 is operated to move wedges 32 and 34 to a retracted position as shown, the effective cross...