US2493683A - Transformer with regulating choke coils - Google Patents

Transformer with regulating choke coils Download PDF

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Publication number
US2493683A
US2493683A US698366A US69836646A US2493683A US 2493683 A US2493683 A US 2493683A US 698366 A US698366 A US 698366A US 69836646 A US69836646 A US 69836646A US 2493683 A US2493683 A US 2493683A
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US
United States
Prior art keywords
core
yokes
transformer
choke coil
transverse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US698366A
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English (en)
Inventor
Meyerhans August
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Germany
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri France SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
Application granted granted Critical
Publication of US2493683A publication Critical patent/US2493683A/en
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit

Definitions

  • the present invention concerns a transformer with regulating choke coil, particularly for Welding, with an enclosed main core for the Windings of the transformer and an adjoining auxiliary core for the regulating reactor, the lines of force of the latter passing partly through the yoke of the main core, the aforementioned disadvantages of this kind of transformer being avoided according to the invention by the transformer and the choke coil possessing a common core column which penetrates the transverse yokes.
  • FIG. 1 shows a transformer and choke coil in longitudinal section, Whilst Fig. 2 is cross-section of Fig. 1.
  • Fig. 1 a is the common core column with transverse yokes b1, bz, b3 for both the transformer windings and choke coil, whilst cl-ca are slide or longitudinal yokes forming magnetic return flow paths.
  • the core a as illustrated in Fig. 2 is seen to be a laminated cylinder, the laminations of which are arranged radially.
  • the primary winding d and the secondary Winding e of the transformer are located on the part of core column a bounded by the yokes b2, b3.
  • the regulating choke coil winding f is located on the part of the core column bounded by the yokes b1, b2 and forms the auxiliary core.
  • the longitudinal yokes are disposed in a cage-like form around the core.
  • the transverse yokes consist of laminations arranged perpendicular to the core axis, whilst the longitudinal yokes are formed by laminations arranged parallel to planes passing through the core axis.
  • the transverse yokes b2, b3 they possess extensions which project freely along the length of core column of the choke coil.
  • the transverse yokes b2, ba are provided with flat supporting
  • the longitudinal yoke parts are supsurfaces for the longitudinal yokes.
  • the transverse yoke b1 which closes the magnetic circuit of the auxiliary core carries the choke coil winding f; both have a certain amount of radial clearance betweenl the core column and the vlongitudinal yokes.
  • the supporting element 7L for the yoke and winding can be provided with an extension z' which slides in the central bore of the core column and*V acts as a guide.
  • Transverse yoke b2 common to both transformer and choke coil is preferably provided with an air gap relative to the longitudinal yokes,'this gap being achieved by the insertion of Apieces of insulating material, whereby as the depth of penetration of the movable transverse yoke carrying the choke coil is increased an increasing and adequate part of the main transformer flux is forced to ow round the choke coil windingto enable the ignition voltage to be sufciently increased for small welding currents.
  • the core column which penetrates the yokes is divided into' two coaxial parts inside the winding of the choke coil f.
  • the part of the core column further removed from the transformer is movable with regard to the'stationary winding of the choke coil.
  • the longitudinal and transverse yokes are in this case composed of E-shaped ,stacks of 'laminations which are pressed against the core columns byimeans of bands.
  • the arrangement according to the invention results in a very compact and light construction for a transformer with choke coil, the production costs being also reduced.
  • a considerable advantage is the automatic increase in ignition voltage when the welding current is reduced, and furthermore the large current range.
  • the transformer together with the choke coil are expediently located in a circular oil-filled tank which closely surrounds the active part.
  • the longitudinal yokes can also be pressed on to the transverse yokes by other means than those described.
  • a magnetic circuit with radial laminated core column it is also possible to employ a core with two return flow yokes.
  • a combined transformer and regulating choke coil structure comprising a central radially laminated core; top and bottom laminated yokes positioned transversely of said core; a third laminated yoke positioned.
  • said intermediate transverse yoke being common to the magnetic circuits of said transformer and choke coil, a plurality of laminated side yokes positioned longitudinally of said core and adjoining said transverse yokes, said side yokes being arranged concentrically about said core with the laminations thereof lying in planes parallel to the core axis; primary and secondary transformer windings surrounding said core between said intermediate bottom transverse yokes, and a choke coil surrounding said core between said intermedi-ate and top transverse yokes, and means for varying the reluctance of that portion of the magnetic circuit associated with said choke coil.
  • a combined transformer and regulating choke coil structure comprising a central radially laminated core; top and bottom laminated yokes positioned transversely of said core; a third laminated yoke positioned transversely of said core intermediate said top and bottom yokes and through which said core passes, said intermediate transverse yoke being common to the magnetic circuits of said transformer and choke coil, a plurality of laminated side yokes positioned longitudinally of said core and adjoining said transverse yokes, said side yokes being arranged concentrically about said core with the laminations thereof lying in planes parallel to the core axis; primary and secondary transformer windings surrounding said core between said intermediate and bottom transverse yokes, and a choke coil surrounding said core between said intermediate and top transverse yokes, said choke coil and top transverse yoke being adjustable longitudinally along said core and side yokes.
  • a combined transformer and regulating choke coil structure comprising a central radially laminated core; top and bottom laminated yQkes positioned transversely of said core; a third laminated yoke positioned transversely of said core intermediate said top and bottom yokes and through which said core passes, said intermediate transverse yoke being common to the magnetic circuits of said transformer and choke coil, a plurality of laminated side yokes positioned longitudinally of said core and adjoining said transverse yokes, said side yokes being arranged concentrically about said core with the laminations thereof lying in planes parallel to the core axis; primary and secondary transformer windings surrounding said core between said intermediate and bottom transverse yokes, and a choke coil surrounding said core between said intermediate and top transverse yokes, said choke coil being carried by said top transverse yoke and the latter being adjustable longitudinally along said core and side yokes.
  • a combined transformer and regulating choke coil structure comprising a central radially laminated core; top and bottom laminated yokes positioned transversely of said core; a third laminated yoke positioned transversely of said core intermediate said top and bottom yokes and through which said core passes, said intermediate transverse yoke being common to the magnetic circuits of said transformer and choke coil, a plurality of laminated side yokes positioned longitudinally of said core and Iadjoining said transverse yokes, said side yokes being arranged concentrically about said core with the laminations thereof lying in planes parallel to the core axis; primary and secondary transformer windings surrounding said core between said intermediate and bottom transverse yokes, and a choke coil surrounding said core between said intermediate and top transverse yokes, said core being divided into upper and lower c0- axial sections at a point inside of said choke coil, and means for adjusting the upper core section longitudinally of the core axis.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
US698366A 1945-09-21 1946-09-20 Transformer with regulating choke coils Expired - Lifetime US2493683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH617642X 1945-09-21

Publications (1)

Publication Number Publication Date
US2493683A true US2493683A (en) 1950-01-03

Family

ID=4523867

Family Applications (1)

Application Number Title Priority Date Filing Date
US698366A Expired - Lifetime US2493683A (en) 1945-09-21 1946-09-20 Transformer with regulating choke coils

Country Status (6)

Country Link
US (1) US2493683A (ko)
BE (1) BE468084A (ko)
CH (1) CH245183A (ko)
FR (1) FR933870A (ko)
GB (1) GB617642A (ko)
NL (1) NL62956C (ko)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2901714A (en) * 1955-11-29 1959-08-25 William R Baker Transformer
US2930997A (en) * 1954-08-11 1960-03-29 Gen Electric Magnetic core construction
CN107424810A (zh) * 2017-07-27 2017-12-01 国网湖北省电力公司计量中心 一种调感式谐振电抗器开口铁芯结构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719275A (en) * 1952-05-02 1955-09-27 Bbc Brown Boveri & Cie Combination choke and transformer
US3213398A (en) * 1960-02-08 1965-10-19 Marton Louis Induction voltage regulator of the moving coil type

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727224A (en) * 1924-02-04 1929-09-03 Charles B Waters Alternating-current arc welding apparatus
US2089926A (en) * 1934-10-31 1937-08-10 Ferranti Electric Inc Moving coil voltage regulator
US2133919A (en) * 1935-03-10 1938-10-18 Fries Eduard Alternating current arc-welding transformer
US2415310A (en) * 1947-02-04 Diagnostic instrument

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415310A (en) * 1947-02-04 Diagnostic instrument
US1727224A (en) * 1924-02-04 1929-09-03 Charles B Waters Alternating-current arc welding apparatus
US2089926A (en) * 1934-10-31 1937-08-10 Ferranti Electric Inc Moving coil voltage regulator
US2133919A (en) * 1935-03-10 1938-10-18 Fries Eduard Alternating current arc-welding transformer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930997A (en) * 1954-08-11 1960-03-29 Gen Electric Magnetic core construction
US2901714A (en) * 1955-11-29 1959-08-25 William R Baker Transformer
CN107424810A (zh) * 2017-07-27 2017-12-01 国网湖北省电力公司计量中心 一种调感式谐振电抗器开口铁芯结构
CN107424810B (zh) * 2017-07-27 2019-03-22 国网湖北省电力公司计量中心 一种调感式谐振电抗器开口铁芯结构

Also Published As

Publication number Publication date
CH245183A (de) 1946-10-31
BE468084A (ko)
GB617642A (en) 1949-02-09
FR933870A (fr) 1948-05-04
NL62956C (ko)

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