US2091366A - Transformer - Google Patents

Transformer Download PDF

Info

Publication number
US2091366A
US2091366A US81722A US8172236A US2091366A US 2091366 A US2091366 A US 2091366A US 81722 A US81722 A US 81722A US 8172236 A US8172236 A US 8172236A US 2091366 A US2091366 A US 2091366A
Authority
US
United States
Prior art keywords
pieces
bridge
transformer
central leg
core
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
US81722A
Other languages
English (en)
Inventor
Klinkhamer Hendrik Abr Wijnand
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of US2091366A publication Critical patent/US2091366A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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

  • My invention relates to variable-leaka e transformers.
  • the adjusting mechanism for the shunts is liable to become jammed and distorted, and also variations in the air gap may occur which change the adjusted value of the short-circuit reactions for a given position of the shunts.
  • the adjusting mechanism must be quite heavily constructed, which increases the cost as well as the sire and weight of the transformer.
  • the object of my invention is to overcome the above difllculties and to provide a variable leakage transformer of small size and of very simple and inexpensive construction.
  • I use a shell-type transformer and slidably dispose the adjustable bridge-pieces within the space formed between its windings, and provide means to shift the bridgepieces relative to each other, whereby they are pressed against either the central leg or the yokes of the core.
  • My invention has particular advantages when used with a plurality of transformer units, for instance with two single-phase units serving to transform three-phase current into four-phase current, which is to be rectified into D. C. welding current.
  • the clamping means can be made very simple by arranging the transformer units with their laminations in parallel planes and with the respective bridge-pieces in alignment, whereby the corresponding bridgepieces of the transformer units are mechanically interconnected and the adjustment of all the bridge-pieces takes place simultaneously.
  • Figure l is a sectionized elevation of a shelltype transformer according to the invention.
  • Fig. 2 is a sectionized view taken along line 2-2 of Figure 1;
  • Fig. 3 is a sectionized view taken along line 3-3 of Fig. 2;
  • Fig. 4 is a partly sectionized view of two transformer units of the type, shown in Figs. 1 to 3 as used for transfonning three-phase current into four-phase current.
  • Fig. 5 is a sectionized side view of Fig. 4.
  • the shell-type transformer shown in Figures 1 to 3 has a laminated core having a central leg 40, and two outer legs or yokes 2 and 3. Surrounding the central leg 40 is a primary winding and a secondary winding 3 l.
  • the bridge-pieces 4 and 5 are secured, for instance by rivets, between strips 6 and 1 and strips I and 9 respectively of non-magnetic material, for instance brass.
  • a single strip clamped centrally between the laminations may be provided (see Figs. 4 and 5).
  • the strips 6 to 9 extend beyond the transformer core, and the bridge-pieces 4 and 5 are movable in the direction of the arrow 32 to vary the leakage of the transformer and thus control the secondary current.
  • the movement of the bridge-pieces l and 5 may be efiected by directly moving the pieces manually, or mechanical adjusting means may be provided for this purpose.
  • a bar 33 is rigidly secured at one end to the strip I and is provided on its free end with a threaded borevcooperating with the threaded end of an adlusting shaft 34, rotatably but not slidably mounted in a member and provided on its end with an operating wheel 36.
  • the member 35 forms part of the transformer housing 45 in which the transformer is fastened by means of angle irons 4B49.
  • various other constructions for instance a rack and pinion, may be used.
  • clamping means are provided whereby the bridge-pieces are forced against the core.
  • bolts l0 and II provided with wing nuts I6 and IT respectively extend between the strips of the bridge-pieces and clamp same together through cross pieces
  • the wing nuts are turned to force the bridge-pieces against the central leg, thereby preventing vibration and humming of the bridge-pieces as well as of the parts of the clamping device.
  • the bolts Hi and I I are replaced by suitable means for forcing the strips apart.
  • bushings 31 of insulating material are provided. Furthermore, to prevent the bolts l0 and H, cross-pieces l2 to
  • the cross pieces l2 and I3 or strips Id and I5 may be of insulating material, or either the strips 6 and 8 or the strips 1 and 9 may be of insulating material.
  • two single-phase shell-type transformer units A and B of a construction similar to that shown in Figs. 1 to 3, are combined to form a transformer device, for instance for supplying four-phase current to a rectifying device from a three-phase source.
  • invention is particularly adapted for use in connection'with such transformers, as the clamping and simultaneous adjustment of the bridge-pieces can be effected in a very simple manner.
  • the transformer units are arranged with their laminations parallel and with the bridgepieces in alignment.
  • The'correspondin'g bridgepieces' of the transformer units are interconnected by means of strips 2
  • the clamping device 23 consists of two strips 3'! extending one on each side of the strips 2
  • the block 25 is provided with a threaded bore which cooperates with'a threaded shaft 26 carrying'on its end an adjusting wheel 24.
  • the free end of shaft 26 is provided with a plate 39 bearing against the strip 22.
  • and 22 are moved together in the direction of the arrow 43,- for instance by an adjusting mechanism of the type shown in Fig. 2.
  • a shell-type variable-leakage transformer comprising a core having a central leg and two yokes, windings spaced apart upon said central leg, two bridge-pieces of magnetic material disposed between'said windings, said bridge-pieces being disposed one between each yoke and the central leg and being movable therebetween to vary the leakage of the transformer, and means interconnecting said bridge-pieces for shifting same relative to each other to clamp same against the core.
  • a shell-type variable-leakage transformer comprising a laminated core having a central leg and two yokes, windings spaced apart upon said central leg, two bridge-pieces of magnetic material between said windings and each disposed between said central leg and one of said yokes, said bridge-pieces being movable between said central leg and yokes in a direction perpendicular to the plane of the core laminations to vary the leakage of the transformer, and means interconnecting said bridge-pieces for shifting same relative to each other to press same against the core.
  • a shell-type variable-leakage transformer comprising a laminated core having a central leg and two yokes, windings spaced apart upon said central leg, two bridge-pieces of magnetic material disposed between said windings and one between said central leg and each yoke and movable therebe'tween, means to simultaneously move said bridge-pieces in a direction normal to the plane of the core laminations to vary the leakage of the transformer, and means interconnecting said bridge-pieces for moving same together to clamp sam'e against the central leg.
  • a shell-type variable-leakage transformer comprising a. laminated core having a central leg and two yokes, windings spaced apart upon said central leg, two bridge-pieces comprising laminations of magnetic material, said bridgepieces being disposed between said windings one between said central leg and each yoke with the laminations extending normally to the axis of the central leg, means to move said bridge-pieces perpendicularly to the core laminationsto vary the leakage of the transformer, and means interconnecting the bridge-pieces for shifting same relative to each other to clamp same against the core.
  • YA shell-type variable-leakage transformer comprising a laminated core having a central leg and two yokes, windings spaced apart upon said v said plates to move same relatively to each other and to clamp same against the core.
  • a transformer device comprising a plurality of shell-type variable-leakage transformers, each of said transformers'comprising a laminated core having a; central leg and two yokes,
  • transformers nd extending beyond the windings spaced apart upon said central leg, two magnetic shunts eaich disposed between said windings and movable between said central leg and one of said y'okes to vary the leakage of the transformer, said transformers being arranged with their laminations parallel and with their shunts in alignment, members mechanically interconnecting the aligned shunts, means for simultaneously adjusting the positions of all the bridge-pieces, and a single clamping device interconnecting said members to move the shunts" relative to each other and clamp same against the cores of the transformers.
  • a transformer device comprising two shelltype variable-leakage transformers, each of said transformers comprising a laminated core having a central leg and two yokes, windings spaced apart upon said central leg, two bridge-pieces of magnetic material each disposed between said windings and movable between said central leg and one of said yokes to vary the leakage of the transformers, said transformers being arranged with their laminations parallel and with the bridge-pieces in alignment, means including members mechanically interconnecting the aligned bridge-pieces for simultaneously adjusting the pomtion of the bridge-pieces, and a clamping device interconnecting said members at a point between the transformers for moving the bridge-pieces to clamp same against the core.
  • a transformer device for transforming three-phase current into four-phase current comprising two shell-type variable-leakagetransformers, each of said transformers comprising a core having a central leg and two yokes, windings spaced apart on said central leg, two bridgepieces of magnetic material eaichv disposed between said windings and movable between said central leg and one of said votes to vary the leakage of the transformer, said transformers being arranged with their laminaiions parallel and with the bridge-pieces in-t, means to simultaneously adjust the positions of said bridge-pieces, and means including a single clamping device for moving said bridge-pieces relative to each other to clamp sameagainst said core.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Housings And Mounting Of Transformers (AREA)
US81722A 1935-06-26 1936-05-25 Transformer Expired - Lifetime US2091366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN38297D DE661458C (de) 1935-06-26 1935-06-26 Manteltransformator, insbesondere zum Speisen von gasgefuellten Gleichrichterroehren fuer Schweissapparate

Publications (1)

Publication Number Publication Date
US2091366A true US2091366A (en) 1937-08-31

Family

ID=27770775

Family Applications (1)

Application Number Title Priority Date Filing Date
US81722A Expired - Lifetime US2091366A (en) 1935-06-26 1936-05-25 Transformer

Country Status (8)

Country Link
US (1) US2091366A (de)
AT (1) AT150906B (de)
BE (1) BE416159A (de)
CH (1) CH190511A (de)
DE (1) DE661458C (de)
FR (1) FR807460A (de)
GB (1) GB453762A (de)
NL (1) NL45187C (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450732A (en) * 1942-09-17 1948-10-05 Hartford Nat Bank & Trust Co Movable magnetic shunt transformer
US2668947A (en) * 1950-02-16 1954-02-09 Allanson Armature Mfg Company Convertible transformer
US2671196A (en) * 1948-06-24 1954-03-02 Frederick C Owen Welding transformer
US3510815A (en) * 1969-04-28 1970-05-05 Twentieth Century Mfg Co Shunt self-centering apparatus
US3514732A (en) * 1969-01-31 1970-05-26 Twentieth Century Mfg Co Shunt centering and locking apparatus
US4164723A (en) * 1978-06-14 1979-08-14 Century Mfg. Co. Shunt release and locking structure
CN103236339A (zh) * 2013-04-19 2013-08-07 西安森宝电气工程有限公司 一种高阻抗壳式变压器

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450732A (en) * 1942-09-17 1948-10-05 Hartford Nat Bank & Trust Co Movable magnetic shunt transformer
US2671196A (en) * 1948-06-24 1954-03-02 Frederick C Owen Welding transformer
US2668947A (en) * 1950-02-16 1954-02-09 Allanson Armature Mfg Company Convertible transformer
US3514732A (en) * 1969-01-31 1970-05-26 Twentieth Century Mfg Co Shunt centering and locking apparatus
US3510815A (en) * 1969-04-28 1970-05-05 Twentieth Century Mfg Co Shunt self-centering apparatus
US4164723A (en) * 1978-06-14 1979-08-14 Century Mfg. Co. Shunt release and locking structure
CN103236339A (zh) * 2013-04-19 2013-08-07 西安森宝电气工程有限公司 一种高阻抗壳式变压器

Also Published As

Publication number Publication date
AT150906B (de) 1937-10-11
CH190511A (de) 1937-04-30
NL45187C (de)
GB453762A (en) 1936-09-17
FR807460A (fr) 1937-01-13
BE416159A (de)
DE661458C (de) 1938-06-18

Similar Documents

Publication Publication Date Title
US2206856A (en) Transformer
US2310138A (en) Electrical switching apparatus
US2091366A (en) Transformer
DE673545C (de) Aus Einsphasentransformatoren bestehender mehrphasiger Streutransformator
US2248070A (en) Welding transformer
US4107635A (en) Arc welding machine
US2411370A (en) Transformer with variable secondary reactance
US20170179839A1 (en) Power circuit, iron core for scott connected transformer, scott connected transformer, and superheated steam generator
US2513512A (en) Variable-current transformer
US1699506A (en) Adjustable inductance
US3419836A (en) Adjustable transformer core clamp
GB1188326A (en) Transformer with Variable Secondary Reactance
US1961761A (en) Winding clamp for electrical induction apparatus
GB474781A (en) Improvements in or relating to transformers with a closed magnetic circuit and controllable magnetic leakage
US2020796A (en) Regulation of voltage
US2264057A (en) Coil support for electrical induction apparatus
US2475044A (en) Adjustable current transformer
US2283712A (en) Transformer
US2488393A (en) Reactor
US3127580A (en) Current regulating welding transformers and core therefor
US2032705A (en) Polyphase transformer
US2491169A (en) Large throat portable welder
US2009800A (en) Adjustable reactance transformer
US2027221A (en) Direct trip device
US3437969A (en) Adjustable inductive apparatus