US2419771A - High reactance transformer - Google Patents

High reactance transformer Download PDF

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Publication number
US2419771A
US2419771A US454948A US45494842A US2419771A US 2419771 A US2419771 A US 2419771A US 454948 A US454948 A US 454948A US 45494842 A US45494842 A US 45494842A US 2419771 A US2419771 A US 2419771A
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Prior art keywords
winding
windings
transformer
high reactance
reactance transformer
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Expired - Lifetime
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US454948A
Inventor
Edwin G Goddard
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Jefferson Electric Co
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Jefferson Electric Co
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Priority to US454948A priority Critical patent/US2419771A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/10—Ballasts, e.g. for discharge lamps

Definitions

  • a high leakage reactance transiormer comprising a magnetic core structure having thereon a primary winding adapted to be connected to a source of alternating current, an auxiliary winding mounted on said core structure directly ad- Jacent one end of said primary winding, one end of said auxiliary winding being connected to the adjacent end of said primary winding, a capacitor connected between the other ends of said auxiliary winding and said primary winding, and a divided secondary winding arranged on said core a cture so as to bebalanced in voltage with ect to said primary winding, said core stru e having high leakage reactance paths between said secondary winding and said first mentioned windings.
  • a high leakage reactance transformer comprising a magnet .xzre structure having thereon an input windin' adapted to be connected to a source oi aiterna g current, an output winding supported by said core structure and arranged tobe in electrically balanced relation to said input winding, said core structure being provided with magnetic shunt means between said windings, an auxiliary winding mounted adjacent said input winding on the same leg of said core structure, and a capacitor connected across said auxiliary winding and said input winding.
  • a high reactance high power factor transformer arrangement comprising a primary winding, an auxiliary winding positioned directly adjaoent thereto and being directly connected to said winding, a capacitor connected across both sold windings, a midpoint grounded secondary windins, and a magnetic core structure for said windings, said core structure being provided with magnetic shunt portions positioned between said secondary winding and said other windings to provide high leakage reactance characteristics.

Description

April 29, 1947- E. s. GODDARD awn nmcnncm mmsmmmn Filed Aug. 15. 1942 1;", aud? The windings 8 inner terminals grounded are connected to supply egative resistance characterwhere the transformer is y luminous tubes.
physical arrangement of the output a illustrated in Fig. 1, it will be they are not symmetrical with respect c winding 6, and hence it is to he stood that one of the windings has a few dinonal turns so as to compensate for the n 61118113, thus to provide an electri- 4 relation between the primary and in a suitable case formed of e appreciated that the case is to the windings 6 to 9. Thus in providing leakage reactance add ion to the magnetic shunts H and Zfi' tnerin re, a leakage path is provided heprirnazy winding 8 and the auxiliary so that where a. case is used this leaktaken into consideration in determindesign of the auxiliary winding and the 'royided between the primary auxiliary virtue of influence difiere'nt load con- ""lfi'v'ififid by such l operate to t current windings a .9. Thus kage reactance tends to com I together the input winding changes in accordyalue oi the load Er. so stance provided by the silt one which varies in The curve ll repret which has been provided reactance designed for a par-= Tne curve l represents the ecteristics of the transformer these two curves it will readily uch wider load range of operan ne for aparticular power factor 1 shown than by former arillustrated by the curve H.
onic frequencies mere-by re- :able improvement in opera- 1i transformer arrangement of the use type therefore is particularly sultver no appreciable range 0! loads g those loads having negative resistance istics, although other types of loads may be used. There is also considerable 1mement oi the reduction of harmonic influ. ence of the power line.
While for the purposes of illustration a particular arrangement has been described, it is to be understood that variations may be made in the arrangement and in the circuit instrumentallties employed without departing from the spirit and scope of my invention as defined in the appended claims.
What I claim as new and desire to secure by letters Patent 01' the United States is:
1. A high leakage reactance transiormer comprising a magnetic core structure having thereon a primary winding adapted to be connected to a source of alternating current, an auxiliary winding mounted on said core structure directly ad- Jacent one end of said primary winding, one end of said auxiliary winding being connected to the adjacent end of said primary winding, a capacitor connected between the other ends of said auxiliary winding and said primary winding, and a divided secondary winding arranged on said core a cture so as to bebalanced in voltage with ect to said primary winding, said core stru e having high leakage reactance paths between said secondary winding and said first mentioned windings.
2. A high leakage reactance transformer comprising a magnet .xzre structure having thereon an input windin' adapted to be connected to a source oi aiterna g current, an output winding supported by said core structure and arranged tobe in electrically balanced relation to said input winding, said core structure being provided with magnetic shunt means between said windings, an auxiliary winding mounted adjacent said input winding on the same leg of said core structure, and a capacitor connected across said auxiliary winding and said input winding.
3. A high reactance high power factor transformer arrangement comprising a primary winding, an auxiliary winding positioned directly adjaoent thereto and being directly connected to said winding, a capacitor connected across both sold windings, a midpoint grounded secondary windins, and a magnetic core structure for said windings, said core structure being provided with magnetic shunt portions positioned between said secondary winding and said other windings to provide high leakage reactance characteristics.
EDWIN G. GODDARD.
aaraaancas man The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 2,212,198 Sole. M Aug. 20, 1910 2,265,700 Outt w Dec. 9, 1941 1,950,395 Boucher Mar. 13, 1934 2,358,725 Mauerer W Sept. 19, 1944 FOREIGN PAI'ENTB Number (bunny Date 627,866 French i...,.......,. June 21, 1927
US454948A 1942-08-15 1942-08-15 High reactance transformer Expired - Lifetime US2419771A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491567A (en) * 1947-02-24 1949-12-20 Kendrick William Leakage reactance transformer
US2512976A (en) * 1948-01-14 1950-06-27 Modern Controls Inc Means for producing constant current from constant potential
US2694177A (en) * 1951-03-16 1954-11-09 Joseph G Sola Transformer having constant and harmonic free output voltage
US3353171A (en) * 1960-12-23 1967-11-14 Allis Chalmers Mfg Co Magnetic device for indicating the occurrence of an electrical signal
US5933340A (en) * 1997-12-02 1999-08-03 Power Circuit Innovations, Inc. Frequency controller with loosely coupled transformer having a shunt with a gap and method therefor
US6088249A (en) * 1997-12-02 2000-07-11 Power Circuit Innovations, Inc. Frequency modulated ballast with loosely coupled transformer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR627866A (en) * 1926-01-23 1927-10-14 Secheron Atel Arc welding transformer with reduced apparent power consumption
US1950395A (en) * 1932-12-12 1934-03-13 Charles P Boucher Means for operating gas filled luminescent tubes
US2212198A (en) * 1940-03-25 1940-08-20 Sola Electric Co Transformer of the constant or limited current type
US2265700A (en) * 1940-05-10 1941-12-09 Gen Electric Transformer
US2358725A (en) * 1942-09-17 1944-09-19 Jefferson Electric Co High reactance transformer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR627866A (en) * 1926-01-23 1927-10-14 Secheron Atel Arc welding transformer with reduced apparent power consumption
US1950395A (en) * 1932-12-12 1934-03-13 Charles P Boucher Means for operating gas filled luminescent tubes
US2212198A (en) * 1940-03-25 1940-08-20 Sola Electric Co Transformer of the constant or limited current type
US2265700A (en) * 1940-05-10 1941-12-09 Gen Electric Transformer
US2358725A (en) * 1942-09-17 1944-09-19 Jefferson Electric Co High reactance transformer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491567A (en) * 1947-02-24 1949-12-20 Kendrick William Leakage reactance transformer
US2512976A (en) * 1948-01-14 1950-06-27 Modern Controls Inc Means for producing constant current from constant potential
US2694177A (en) * 1951-03-16 1954-11-09 Joseph G Sola Transformer having constant and harmonic free output voltage
US3353171A (en) * 1960-12-23 1967-11-14 Allis Chalmers Mfg Co Magnetic device for indicating the occurrence of an electrical signal
US5933340A (en) * 1997-12-02 1999-08-03 Power Circuit Innovations, Inc. Frequency controller with loosely coupled transformer having a shunt with a gap and method therefor
US6088249A (en) * 1997-12-02 2000-07-11 Power Circuit Innovations, Inc. Frequency modulated ballast with loosely coupled transformer

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