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Ferroresonant, Constant Voltage Transformer

IP.com Disclosure Number: IPCOM000092128D
Original Publication Date: 1968-Sep-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Weichert, JA: AUTHOR

Abstract

The capacitive load required in a ferroresonant, constant-voltage transformer is integrated into the transformer structure. This is effected by making the secondary winding of the transformer in the form of a pair of convolutely wound bifilar strips of conducting material. The strips are connected to each other in a series-aiding configuration and are separated from each other by insulating layers. In drawing A, leg 10 of ferroresonant transformer core 11 contains a wound primary coil 12 having input leads 13. Regulated secondary winding 14 has a pair of output leads 15 and center tap 15'. A schematic representation of the secondary 14, drawing B, shows a pair of convolutely wound conducting strips or foils 16A and 16B having start terminals 17A and 17B and finish terminals 18A and 18B.

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Ferroresonant, Constant Voltage Transformer

The capacitive load required in a ferroresonant, constant-voltage transformer is integrated into the transformer structure. This is effected by making the secondary winding of the transformer in the form of a pair of convolutely wound bifilar strips of conducting material. The strips are connected to each other in a series-aiding configuration and are separated from each other by insulating layers. In drawing A, leg 10 of ferroresonant transformer core 11 contains a wound primary coil 12 having input leads 13. Regulated secondary winding 14 has a pair of output leads 15 and center tap 15'. A schematic representation of the secondary 14, drawing B, shows a pair of convolutely wound conducting strips or foils 16A and 16B having start terminals 17A and 17B and finish terminals 18A and 18B. These conductors are insulated from each other by thin dielectric layers 19. These also provide a large capacitance between strips 16A and 16B, thus integrating within the secondary winding itself, the required capacitive load for the transformer. Capacitance is maximized by connecting output leads 15 between start terminal 17B of strip 16B and finish terminal 18A of strip 16A. Remaining terminals 17A and 188 are connected to each other and can be brought out to center-tap lead 15'. If the lengths of the strips are equal, the center-tap is necessarily balanced between terminals 15. Alternatively, terminals 15 can be left open-circuited,...