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Adjustable Magnetic Coupled Transformer

IP.com Disclosure Number: IPCOM000092127D
Original Publication Date: 1968-Sep-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Weichert, JA: AUTHOR

Abstract

Power transformer 10 has a plurality of windings 11...15. The voltages of at least some of the windings are related to each other in a sequence of 3/n/ where n is an integer. Selected windings can then be coupled together either in series-aiding or in series-opposing connections in order to obtain a number of voltages separated from each other by a constant increment. Suppose, for instance, that winding 11 is connected to an AC source such that the voltages of windings 12...15 are 1, 3, 9, and 27 volts respectively. Then a 1 volt output can be taken across terminals 12A and 12B, leaving terminals 13A...15B disconnected. A 2 volt output can be taken across terminals 12A and 13A by connecting together the terminals 12B and 13B. A 4 volt output exists across 12A and 13B when terminals 12B and 13A are coupled to each other.

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Adjustable Magnetic Coupled Transformer

Power transformer 10 has a plurality of windings 11...15. The voltages of at least some of the windings are related to each other in a sequence of 3/n/ where n is an integer. Selected windings can then be coupled together either in series- aiding or in series-opposing connections in order to obtain a number of voltages separated from each other by a constant increment. Suppose, for instance, that winding 11 is connected to an AC source such that the voltages of windings
12...15 are 1, 3, 9, and 27 volts respectively. Then a 1 volt output can be taken across terminals 12A and 12B, leaving terminals 13A...15B disconnected. A 2 volt output can be taken across terminals 12A and 13A by connecting together the terminals 12B and 13B. A 4 volt output exists across 12A and 13B when terminals 12B and 13A are coupled to each other. A 22 volt output exists between 12A and 15B when the connections 12B-13A, 13B-14B, 14A-15A are made. Thus, outputs from 1 to 40 volts are available in 1 volt increments with the use of only four windings. A transformer such as 10 finds use in applications where a constant voltage is desired from winding 11 despite various line voltages which exist in different localities. If the voltages of the windings 12...15 are made to be 5, 15, 105 and 105 volts respectively, then voltages from 85 to 125 and from 190 to 230 can be matched in 5 volt increments to obtain a constant voltage output from winding 11. That is...