US3891954A - Transformer - Google Patents

Transformer Download PDF

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Publication number
US3891954A
US3891954A US429766A US42976674A US3891954A US 3891954 A US3891954 A US 3891954A US 429766 A US429766 A US 429766A US 42976674 A US42976674 A US 42976674A US 3891954 A US3891954 A US 3891954A
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United States
Prior art keywords
core
plate means
setting
transformer
end plate
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Expired - Lifetime
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US429766A
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English (en)
Inventor
Iseo Konishi
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Individual
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together

Definitions

  • the present invention relates to a transformer adaptable to electric machines of various types, in which [52] 336/61; d the increase and decrease in the number of sheets of ,2 the laminated iron plates is made possible by holdin I c1 HOlf 27 26 g [51] 'f 98 55 with pressure the corners of the core with suppression [581 Md 0 each plates.
  • a conventional transformer in which the clamping bolts are pierced through the four corners of the core, and the bolts are detachably clamped, thereby enabling the addition of laminate steel plates.
  • the piercing holes develop a magnetic resistance in the core, and the bolts may sustain a hysteresis loss with the evolution of heat, thereby causing reduction in performance.
  • the present invention has, as its objective, the provision of a transformer, in which the corners of the core are held by pressure by means of setting plates.
  • the core is securely held in position without sustaining a hysteresis loss and a decrease and increase in the number of sheets of the laminated iron plates is possible.
  • This construction is applicable also to ferrite cores and solid cores. and has a notable effect in the improvement of performance.
  • Another objective is to provide a transformer, in which through the improvement in the heat radiation and dust-proofing characteristics, the performance degradation of the core is prevented, thereby greatly enhancing its durability.
  • end plates are put on the top and bottom surfaces of the core; against the end surfaces and side surfaces of the laminated iron plates along the edges of the four corners of the core.
  • Setting members each provided with two setting plates held at a right angle are pressed, and the coupling bolts are pierced through the end plates and the setting members, thereby securely holding the core.
  • Another object of this invention is to provide a transformer, in which the core is enclosed by abutting metal plates on the end surfaces of the core. Setting members are put respectively on the outside of each abutted part of the metal plates at each core edge. and the cover plates are placed on the top and bottom. thereby hermetically enclosing the whole. In this manner, the heat radiating surface is enhanced, and the performance of heat radiation and dust-proofing are much improved.
  • FIG. I shows an oblique view of the transformer of this invention
  • FIG. 2 is a sectional view along II--II line of FIG. 1;
  • FIG. 3 represents an oblique view of a transformer of a second embodiment
  • FIG. 4 is a sectional view along lV-IV line of FIG. 3;
  • FIG. 5 is a sectional view along V-V line of FIG. 4.
  • the transformer body is formed by winding a coil 2 on the core 1 ofthe laminated iron plates.
  • the end plates 3 and 4 formed of an insulating material are put on the top and bottom of this core 1. Holes are made at the four corners of the end plates 3 and 4, through which the coupling bolts 5 are placed.
  • a setting member 6 is placed, to hold, with pressure. two side surfaces of the core, making a right angle at each core edge.
  • the aforementioned setting member 6 if formed, for example, by bending a copper plate or by drawing an aluminum plate.
  • a pipe shaped axial hole 7 is formed vertically at the center, and both end edges outside the axial hole project outwardly at a sharp angle approximating a right angle, thereby forming the setting plate 8.
  • Coupling bolts 5 are inserted through the holes 11 at the four corners of the top and bottom end plates 3 and 4, and the axial hole 7 of the setting member 6, so that the core 1 may be held with pressure between the end plates 3 and 4, while the end surface and the side surface making a right angle at each corner of the core 1 are held with pressure by means of respective setting plates 8.
  • fitting screw holes 9 are opened adjacent to the coilwound transformer body and fitting flanges do not project from the transformer body, as in conventional transformers. Because the laminated core I is pressed at its four corners by means of the setting members 6, the laminated iron plates are free of play, and the increase or decrease of the number of sheets of iron plates, if that number of sheets are small, may be accomodated by the elastic deformation of the setting plates 6, or bolts 5 are inserted in the auxiliary holes. through which the bolts pass through. and which are opened in the end plates 3 and 4. In this way. the need of preparing various dies for manufacturing several kinds of cases corresponding to the size of the transformer, which is usually the case, may be obviated, and a small increase in the energizing voltage of the trans former may be very easily made.
  • FIGS. 3 through 5 show a transformer of a second embodiment.
  • the end surfaces surrounding the core 1 are formed of laminated iron plates. and like the core of the previous embodiment. are enclosed by putting metal plates 10 respectively thereon.
  • the aforementioned setting member 6, provided with two setting plates 8 at a right angle. is pressed on the outside surfaces of the metal plates 10.
  • a setting agent such as pitch. etc. is filled in the internal space. as may be required, to stabilize the core in position.
  • the end plates 3 and 4 are put on the top and bottom of the metal plates 10, thereby hermetically enclosing the whole; and then.
  • the coupling bolts are passed through the holes at the four corners of the top and bottom of the end plates and the axial holes 7 of the setting member 6. In this way. the side surface of each metal plate 10 is held by pressure between the setting members. thereby pressing each metal plate 10 against each end surface of the core I.
  • the heat evolved at the core may be transferred to the metal plates 10, to be radiated from the whole surface area of the metal plates 10, thus improving the cooling effect. and moreover. preventing dust from entering the coil. Accordingly. there is no requirement for a special dust-proof cover. as in conventional transformers.
  • the setting plates press the core. and hold it firmly in place by the spring force of the setting surface. For this reason. no bolt inserting holes are necessary in the core. and accordingly. no bolts are inserted through the core. thereby doing away with the undesirable reduction in strength of the core. and the resulting increase in the magnetic resistance and hysteresis loss.
  • a ferrite core is employed for the core of this invention. the characteristic of this invention may be fully exhibited. and when a solid core is used. a satisfactory magnetic transmission may be expected. because the abutting surfaces are pressure set.
  • a transformer device comprising:
  • each setting plate means approximately equal in length to the height of the core.
  • each said setting plate means including two setting surface means forming a substantially right angle. wherein each said setting plate means engaging only one corner of said core with said set ting surface means pressing against the respective core edges. and thereby firmly holding said core in place; and.
  • a transformer device comprising:
  • setting plate means approximately equal in length to the height of the core.
  • said setting plate means including an axial hole in the lengthwise direction thereof, two setting surface means forming a substantially right angle. wherein said setting surface means presses against the respective core edges. and thereby firmly holds said core in place; and.
  • each said end plate means including holes corresponding to the respective said axial holes; and wherein said setting plate means are clamped and securely held between the top and bottom end plate means by bolts through the holes in said end plate means and said axial holes of said setting plate means.
  • a transformer device comprising:
  • setting plate means approximately equal in length to the height of the metal plates; having two setting surface means forming substantially a right angle, said setting surface means pressing against the abutting parts of the metal plate at the core edges thereby holding the core in place; and.
  • a transformer device comprising:
  • a. a core formed of laminated iron plates. on which a coil is wound;
  • each setting plate means having an axial hole and two setting surface means forming a substantially right angle along the lengthwise direction thereof. said plate surface means pressing against each core edge. thereby firmly holding said core in place;
  • top and bottom end plate means respectively arranged at the top and bottom of said core.
  • said end plate means including holes corresponding to the axial holes of said setting plate means; and.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Coils Or Transformers For Communication (AREA)
US429766A 1972-12-29 1974-01-02 Transformer Expired - Lifetime US3891954A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48002171A JPS4988900A (zh) 1972-12-29 1972-12-29

Publications (1)

Publication Number Publication Date
US3891954A true US3891954A (en) 1975-06-24

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JP (1) JPS4988900A (zh)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1012607C2 (nl) * 1999-07-15 2001-01-16 Faget Electrische Meetinstrume Samenstel van een ringkerndrager en ÚÚn of meerdere ringkernen, ringkerndrager en ringkern voor een dergelijk samenstel.
CN103282983A (zh) * 2011-02-14 2013-09-04 住友电气工业株式会社 电抗器、电抗器制造方法、以及电抗器部件
CN103518242A (zh) * 2011-05-10 2014-01-15 住友电气工业株式会社 电抗器、变换器以及功率变换装置
US9318250B2 (en) 2011-05-10 2016-04-19 Sumitomo Electric Industries, Ltd. Reactor, converter, and power converter apparatus
US20170086336A1 (en) * 2014-06-04 2017-03-23 Toshiba Mitsubishi-Electric Industrial Systems Corporation Power apparatus
US20180336984A1 (en) * 2017-05-22 2018-11-22 Fanuc Corporation Reactor having outer peripheral iron core divided into multiple portions and production method therefor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2148449A (en) * 1937-08-20 1939-02-28 Edwards And Company Inc Transformer construction
US2815491A (en) * 1956-08-14 1957-12-03 Gen Electric Inductive device
US2845602A (en) * 1954-12-30 1958-07-29 Gen Electric Transformer core construction
US3011139A (en) * 1958-07-07 1961-11-28 Gen Electric Inductive device and frame therefor
US3138774A (en) * 1961-02-03 1964-06-23 Gen Electric Electrical induction apparatus with resiliently supported magnetic core
US3226664A (en) * 1962-07-11 1965-12-28 Sylvania Electric Prod Sealed inductor
US3262077A (en) * 1962-03-26 1966-07-19 Sylvania Electric Prod Electromagnetic inductor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2148449A (en) * 1937-08-20 1939-02-28 Edwards And Company Inc Transformer construction
US2845602A (en) * 1954-12-30 1958-07-29 Gen Electric Transformer core construction
US2815491A (en) * 1956-08-14 1957-12-03 Gen Electric Inductive device
US3011139A (en) * 1958-07-07 1961-11-28 Gen Electric Inductive device and frame therefor
US3138774A (en) * 1961-02-03 1964-06-23 Gen Electric Electrical induction apparatus with resiliently supported magnetic core
US3262077A (en) * 1962-03-26 1966-07-19 Sylvania Electric Prod Electromagnetic inductor
US3226664A (en) * 1962-07-11 1965-12-28 Sylvania Electric Prod Sealed inductor

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1012607C2 (nl) * 1999-07-15 2001-01-16 Faget Electrische Meetinstrume Samenstel van een ringkerndrager en ÚÚn of meerdere ringkernen, ringkerndrager en ringkern voor een dergelijk samenstel.
EP1069577A1 (en) * 1999-07-15 2001-01-17 Faget Electrische Meetinstrumenten- en Apparatenfabriek Faber & Getreuer B.V. Assembly of a ring carrier and one or several cores, ring core carrier and ring core for such an assembly
CN103282983A (zh) * 2011-02-14 2013-09-04 住友电气工业株式会社 电抗器、电抗器制造方法、以及电抗器部件
CN103518242A (zh) * 2011-05-10 2014-01-15 住友电气工业株式会社 电抗器、变换器以及功率变换装置
US20140085026A1 (en) * 2011-05-10 2014-03-27 Sumitomo Electric Industries, Ltd. Reactor, converter, and power converter apparatus
US9318250B2 (en) 2011-05-10 2016-04-19 Sumitomo Electric Industries, Ltd. Reactor, converter, and power converter apparatus
CN103518242B (zh) * 2011-05-10 2016-08-17 住友电气工业株式会社 电抗器、变换器以及功率变换装置
US9484139B2 (en) * 2011-05-10 2016-11-01 Sumitomo Electric Industries, Ltd. Reactor, converter, and power converter apparatus
US20170086336A1 (en) * 2014-06-04 2017-03-23 Toshiba Mitsubishi-Electric Industrial Systems Corporation Power apparatus
US20180336984A1 (en) * 2017-05-22 2018-11-22 Fanuc Corporation Reactor having outer peripheral iron core divided into multiple portions and production method therefor
US10714248B2 (en) * 2017-05-22 2020-07-14 Fanuc Corporation Reactor having outer peripheral iron core divided into multiple portions and production method therefor

Also Published As

Publication number Publication date
JPS4988900A (zh) 1974-08-24

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