US3787792A - Coil former for a transformer - Google Patents

Coil former for a transformer Download PDF

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Publication number
US3787792A
US3787792A US00341984A US3787792DA US3787792A US 3787792 A US3787792 A US 3787792A US 00341984 A US00341984 A US 00341984A US 3787792D A US3787792D A US 3787792DA US 3787792 A US3787792 A US 3787792A
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US
United States
Prior art keywords
winding
central part
transformer
flange
flanges
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
US00341984A
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English (en)
Inventor
N Dejong
M Arie
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.)
US Philips Corp
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3787792A publication Critical patent/US3787792A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H01F2005/022—Coils wound on non-magnetic supports, e.g. formers wound on formers with several winding chambers separated by flanges, e.g. for high voltage applications

Definitions

  • ABSTRACT A coil former for a transformer having four flanges which are consecutively arranged on a central part, each of the two intermediate flanges having a thick edge in which a connection pin is connected. The two thick edges are diametrically arranged on opposite sides of the central part.
  • the invention relates to a coil former for a transformer, consisting of a central .part on which a first winding space is bounded by a first flange which is arranged near one end of the central part, and by a second flange which is arranged between this end and the middle of the central part, a second winding space being bounded by a third flange which is arranged near the other end of the central part and by a fourth flange which is arranged between this other end and the middle of the central part, a third winding space being present between the second and the fourth flange.
  • Coil formers of this kind can be used for the manufacture of transforemrs where, for example, a primary winding is provided in the third winding space, and two I secondary windings in the first and the second winding space, respectively, the latter winding spaces preferably having the same'dimensions.
  • These windings can be connected to connection pins which are preferably provided in the sides of the flanges so as to save space.
  • connection pins it is necessary that the relevant flange edges have a given minimum thickness which is usually larger than the optimum thickness of the flanges themselves.
  • One of the two flanges bounding the third winding space could be given the thickness required for the provision of the connection pins over its entireyvidth, so that the winding spaces have the same length over their centre width, but this has the drawback that the coupling between the two windings on each side of the relevant flange deteriorates, which is not acceptable in many cases.
  • the transformer then becomes asymmetrical, unless the other flange bounding the third winding space is also given the same thickness, so that the coupling between the two windings on each side of this flange also deteriorates, which is of course not acceptable either.
  • the invention has for its object to provide a coil former which is provided with connection pins, but which does not have the described drawbacks.
  • the coil former according to the invention is characterized in that one of the edges of the second as well as the fourth flange is made to be thicker than the opposite edge, the thick edges of the second and the fourth flange being situated on diametrically opposed sides of the central part, the thick edges accommodating connection pins for a transformer winding to be provided on the coil former.
  • the construction of the coil former according to the invention is simplest and the'provision of the windings is easiest if the sides of the second and the fourth flange, facing the first and the second winding space, respectively, are perpendicular to the axis of the central part, whilst the sides of these flanges which face the third winding space enclose, at least over a substantial part of their width, an angle other than with the said axis and are parallel to each other.
  • the said windings are preferably arranged such that the transformer is symmetrical with respect to a plane which is perpendicular to the axis of the central part and which divides said axis into two equal pieces. That is to say, the first and the second winding are identical as regards their dimensions and number of turns, whilst the third winding is divided into two equal pieces by the said plane in view of its location in the third winding space.
  • FIG. 1 is a plan view of a coil former according to the invention.
  • FIG. 2 is a side elevation of a transformer incorporating the coil former shown in FIG. 1.
  • the coil former shown in FIG. 1 is made of an insulating synthetic resin material and consists of a preferably cylindrical central part 1, on which a first winding space 3 is situated which is bounded by a first flange 5 which is arranged near one end (the left-hand end in FIG. 1) of the central part and by a second flange 7 which is arranged between this end and the middle of the central part.
  • a second winding space 9 is bounded by a third flange 11 which is arranged near the other end (the right-hand end in FIG. 1) of the central part 1 and by a fourth flange 13 which is arranged between this right-hand end and the middle of the central part.
  • a third winding space 15 is present between the second flange 7 and the fourth flange 13.
  • the side of the second flange 7 which faces the first winding space 3 is perpendicular to the axis of the central part 1, like the side of the fourth flange 13 which faces the second winding space 9.
  • the sides of these two flanges which face the third winding space 15, however, enclose an angle which is not 90 with the said axis over the largest part of their width. These sides are parallel to each other, so that the third winding space has a constant length over the major part of its width.
  • these flanges are approximately wedge-shaped.
  • the second flange 7, consequently, has an edge 17 which is substantially thicker than the oppositely arranged edge 18, and the fourth flange 13 also has an edge 19 which is substantially thicker than the oppositely arranged edge 20.
  • the thick edges 17 and 19 are situated on diametrically opposed sides of the central part 1.
  • connection pins 21 which are preferably embedded in the synthetic resin material of the coil former, their length exceeding the height of the flanges so that they project above as well as below the coil former (see also FIG. 2).
  • the first flange 5 and the third flange 11 are provided, on both sides of the central part 1, with thick 3 side edges 23 and 25, respectively, in which connection pins 21 are provided in the same manner.
  • FIG. 2 shows a transformer which is manufactured by means of the coil former shown in FIG. 1.
  • a first winding 27 is provided, in the second winding space 9 a second winding 29, and in the third winding space a third winding 31.
  • Each of these windings terminates in two connection wires 33 which are connected, for example, by soldering, to the upper ends of the connection pins 21.
  • the lower ends of these connection pins can be soldered, for example, in a printed circuit board.
  • the transformer also comprises a ferromagnetic core which is not shown in this figure for the sake of simplicity.
  • the first winding 27 and the second winding 29 are made of the same number of turns of copper wire of the same thickness, so that they are fully identical because the dimensions of the first and the second winding space, 3 and 9, are also equal.
  • the third winding 31 can consist of a different number of turns of copper wire having a different thickness. Due to the location of the third winding space 15 and the shape of the flange 7 and 13, this winding is symmetrical with respect to a plane which is perpendicular to the axis of the central part and which divides this axis into two equal parts. Due to this fact and the fact that the first and the second winding 7 and 29 are identical, the entire transformer has the same symmetry.
  • the described embodiment of a coil former according to the invention is a particularly simple one.
  • the sides of the flanges 7 and 13 which face the third winding space 15 can also be perpendicular to the axis of the central part 1, whilst the sides of the first flange 5 and the second flange 7 which face the first winding space 3 deviate from the perpendicular position, like the sides of the third flange 11 and the fourth flange 13 which face the second winding space 9.
  • the first and the second winding space 3 and 9 are inclined with respect to the axis of the central part 1.
  • a coil former for a transformer comprising a central part on which a first winding space is bounded by a first flange which is arranged near one end of the central part and by a second flange which is arranged between said one end and the middle of the central part, a second winding space being bounded by a third flange which is arranged nearthe other end of the central part and by a fourth flange which is arranged between said other end and the middle of the central part, a third winding space being present between the second and the fourth flanges, one of the edges of the second and the fourth flanges being made to be thicker than the opposite edges thereof, the thick edges of the second and the fourth flanges being situated on diametrically opposed sides of the central part with, the thick edges accommodating connection pins for a transformer winding to be provided on the coil former.
  • a coil former as claimed in claim 1 characterized in that the sides of the second and the fourth flanges which face the first and the second winding spaces, respectively, are perpendicular to the axis of the central part, and, the sides of said second and fourth flanges which face the third winding space form, at least over a substantial part of their width, an angle other than with the said axis and are parallel to each other.
  • a transformer coil form as claimed in claim 1 further comprising a first, a second and a third winding which are arranged in the first, the second and the third winding spaces, respectively, of the coil former to form a transformer, characterized in that the said windings are arranged such that the transformer is symmetrical with respect to a plane which is perpendicular to the axis of the central part and which divides this axis into two equal parts.
  • a transformer coil form as claimed in claim 2 further comprising a first, a second and a third winding which are arranged in the first, the second and the third winding spaces, respectively, of the coil former to form a transformer, characterized in that the said windings are arranged such that the transformer is symmetrical with respect to a plane which is perpendicular to the axis of the central part and which divides this axis into equal parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Insulating Of Coils (AREA)
US00341984A 1972-03-22 1973-03-16 Coil former for a transformer Expired - Lifetime US3787792A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7203795A NL7203795A (es) 1972-03-22 1972-03-22

Publications (1)

Publication Number Publication Date
US3787792A true US3787792A (en) 1974-01-22

Family

ID=19815671

Family Applications (1)

Application Number Title Priority Date Filing Date
US00341984A Expired - Lifetime US3787792A (en) 1972-03-22 1973-03-16 Coil former for a transformer

Country Status (8)

Country Link
US (1) US3787792A (es)
JP (1) JPS5242335Y2 (es)
DE (1) DE2311583A1 (es)
ES (1) ES412845A1 (es)
FR (1) FR2177041B1 (es)
GB (1) GB1425119A (es)
IT (1) IT980640B (es)
NL (1) NL7203795A (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4352079A (en) * 1981-07-24 1982-09-28 Honeywell Inc. High voltage ignition transformer
US20030011453A1 (en) * 2000-12-22 2003-01-16 Volker Nadenau Electromagnet
US20110266401A1 (en) * 2010-04-30 2011-11-03 Honeywell International Inc. Electrical winding and termination interface
CN103201802A (zh) * 2010-11-11 2013-07-10 罗伯特·博世有限公司 具有减少的部件数量的点火线圈

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL178373C (nl) * 1977-06-06 1986-03-03 Philips Nv Transformator.
JPS59172346A (ja) * 1983-03-18 1984-09-29 Kataoka Kikai Seisakusho:Kk 表面駆動式巻取装置
JPS60173542U (ja) * 1984-04-23 1985-11-16 株式会社　キンダイ 長尺物の巻取装置
JP2530618Y2 (ja) * 1990-04-04 1997-03-26 株式会社キジマ 小形トランス
DE19529725A1 (de) * 1995-08-12 1997-02-13 Teves Gmbh Alfred Spulenträger

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594915A (en) * 1943-02-05 1952-04-29 Guillemant Rene-Edouard Oscillating circuits
US3189707A (en) * 1962-04-03 1965-06-15 Fed Pacific Electric Co Coil form adapted for use in magnetictrip circuit breakers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594915A (en) * 1943-02-05 1952-04-29 Guillemant Rene-Edouard Oscillating circuits
US3189707A (en) * 1962-04-03 1965-06-15 Fed Pacific Electric Co Coil form adapted for use in magnetictrip circuit breakers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4352079A (en) * 1981-07-24 1982-09-28 Honeywell Inc. High voltage ignition transformer
US20030011453A1 (en) * 2000-12-22 2003-01-16 Volker Nadenau Electromagnet
US6724287B2 (en) * 2000-12-22 2004-04-20 Robert Bosch Gmbh Electromagnet
US20110266401A1 (en) * 2010-04-30 2011-11-03 Honeywell International Inc. Electrical winding and termination interface
US9203228B2 (en) * 2010-04-30 2015-12-01 Honeywell International Inc. Electrical winding and termination interface
US20160072268A1 (en) * 2010-04-30 2016-03-10 Honeywell International Inc. Electrical winding and termination interface
CN103201802A (zh) * 2010-11-11 2013-07-10 罗伯特·博世有限公司 具有减少的部件数量的点火线圈

Also Published As

Publication number Publication date
FR2177041A1 (es) 1973-11-02
GB1425119A (en) 1976-02-18
IT980640B (it) 1974-10-10
DE2311583A1 (de) 1973-10-04
JPS5242335Y2 (es) 1977-09-26
FR2177041B1 (es) 1978-03-10
ES412845A1 (es) 1975-12-16
NL7203795A (es) 1973-09-25
JPS497412U (es) 1974-01-22

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