EP1826785A1 - Transformator und Schaltung mit solchem Transformator - Google Patents

Transformator und Schaltung mit solchem Transformator Download PDF

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Publication number
EP1826785A1
EP1826785A1 EP06425111A EP06425111A EP1826785A1 EP 1826785 A1 EP1826785 A1 EP 1826785A1 EP 06425111 A EP06425111 A EP 06425111A EP 06425111 A EP06425111 A EP 06425111A EP 1826785 A1 EP1826785 A1 EP 1826785A1
Authority
EP
European Patent Office
Prior art keywords
transformer
winding
conducting
core
winding 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.)
Granted
Application number
EP06425111A
Other languages
English (en)
French (fr)
Other versions
EP1826785B1 (de
Inventor
Danilo Bizzarri
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.)
Power One Italy SpA
Original Assignee
Power One Italy SpA
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 Power One Italy SpA filed Critical Power One Italy SpA
Priority to AT06425111T priority Critical patent/ATE480859T1/de
Priority to DE602006016723T priority patent/DE602006016723D1/de
Priority to EP06425111A priority patent/EP1826785B1/de
Publication of EP1826785A1 publication Critical patent/EP1826785A1/de
Application granted granted Critical
Publication of EP1826785B1 publication Critical patent/EP1826785B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2866—Combination of wires and sheets
    • 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
    • H01F27/2847—Sheets; Strips
    • H01F2027/2861—Coil formed by folding a blank

Definitions

  • the present invention relates to a transformer for electrical and/or electronic circuits of the type comprising at least one winding formed by a bent conductive foil.
  • the object of the present invention is to produce a particularly versatile transformer, suitable to be utilized in different configurations utilizing the same basic components.
  • the invention relates to a transformer for electrical or electronic circuits comprising: a ferromagnetic core; combined with said ferromagnetic core at least a first winding core and a second winding core for winding conducting wire; a first conducting foil applied to the first winding core and a second conducting foil applied to the second winding core, said conducting foils forming at least part of a winding of the transformer.
  • the winding cores each have a central body for winding the conducting wire and two flanges.
  • each of said conducting foils forms two winding turns which can be positioned on the outside of the respective winding core, resting on the outer face of the two flanges of said winding core.
  • At least one of the flanges of each winding core has a seat for housing a portion of the respective conducting foil.
  • the portion of the conducting foil forms a connection between the first and the second turn formed by the respective conducting foil, and the seat is formed on the rim of one of the two flanges of the respective winding core, to receive said connecting portion.
  • At least one flange and preferably both flanges of each winding core has reciprocal positioning stops between the winding core and the ferromagnetic core.
  • each of the winding cores has a pair of connectors for the ends of the conducting wire wound therearound.
  • the pairs of connectors of the two winding cores can preferably be superimposed on each other, to obtain an optimal configuration of the connections to the electronic circuit.
  • each winding core has an auxiliary connector for an auxiliary conducting wire forming a further winding.
  • the auxiliary connectors of the two winding cores are also preferably superimposed when the transformer is assembled.
  • the invention also relates to an electrical or electronic circuit comprising a transformer of the aforesaid type.
  • the transformer as a whole is indicated with 1 and comprises a ferromagnetic core 3 formed of two portions 3A and 3B coupled with each other.
  • the two portions 3A, 3B of the ferromagnetic core 3 each have a base 3C, side walls 3D and a central expansion 3E.
  • the transformer also comprises two winding cores made of a plastic material, indicated with 7, substantially identical to each other.
  • Each winding core 7 (see in particular Figures 1, 5, 6 and 7) has a central body 7A and two flanges 7B, 7C.
  • a conducting wire F (indicated in Figure 6 and omitted for clarity of the drawing in the remaining figures) is wound around the central body 7A and between the two flanges 7B, 7C.
  • the wire F is suitably insulated, i.e. by a triple insulation.
  • each winding core 7 is enclosed superiorly and inferiorly by two respective turns 9A, 9B formed by respective conducting foils 9.
  • the form of each conducting foil forming the turns 9A, 9B associated with each winding core 7 will be described in greater detail hereunder with reference to Figures 1 and 9.
  • each conducting foil 9 The two turns 9A and 9B formed by each conducting foil 9 are joined by an intermediate connecting portion 9C, which is housed inside a seat 7E provided along the edge of one of the flanges of the respective winding core 7.
  • Each winding core 7 also has profiles 7F produced on the corresponding flanges 7B, 7C, which form a stop between the winding cores and the portions 3A, 3B of the ferromagnetic core 3. In this way the reciprocal angular position between each winding core 7 and the ferromagnetic core 3A, 3B is also defined.
  • Each winding core 7 has, in an expansion of the flange 7C, two connectors 13 to which the ends of the conducting wire F, wound around the respective winding core, are advantageously soldered.
  • the plastic material forming each winding core 7 forms seats in which conducting pins (not shown), which form the actual connectors 13, are inserted.
  • auxiliary connector 15 is provided on the opposed flange 7D of each winding core 7.
  • the connectors 13, 13 and 15 are on opposite sides of a median plane containing the axis of the winding core and orthogonal to the planes on which the flanges 7B, 7C lie.
  • the transformer thus has two pairs of connectors 13 for two conducting wires F wound on two winding cores 7 and two auxiliary connectors 15 for an optional conducting wire forming an auxiliary winding, not shown.
  • the pairs of connectors 13 are superimposed on each other on the same side of a median plane of the transformer, while the auxiliary connectors 15, again superimposed, are positioned on the opposite side of said plane.
  • each winding core 7 is formed by protrusions made of the same basic material of the flanges 7B, 7C of the respective winding core 7. These protrusions form ( Figures 3 and 4) further reciprocal angular positioning stops between the winding core 7 and the ferromagnetic core 3, 3A, 3B.
  • the turns 9A, 9B which externally enclose the two flanges 7B, 7C of each winding core 7 are formed by bending of a conducting foil the flat development of which is shown in Figure 9.
  • This conducting foil for example produced by die cutting from a sheet of copper or the like, has a first substantially annular portion 17A, and a second substantially annular portion 17B, each of said substantially annular portions 17A, 17B forming one of the turns 9A, 9B of the foil which, after bending, are positioned superimposed and coaxial.
  • Each annular portion 17A, 17B has interruptions at the level of a radial line 17C ( Figure 9). Adjacent to the interruption line 17C each portion 17A, 17B has a projection 17D forming, once the foil has been bent to form the two coaxial turns 9A, 9B in a superimposed and axially staggered position, electrical connections towards an electronic circuit board (not shown), on which the transformer is assembled.
  • connecting portion 9C Extending between the two projections 17D is the connecting portion 9C, which joins the annular portions 17A, 17B.
  • This connecting portion 9C is bent through 90° along the lines 9L (figure 1) so that the portions 17A, 17B of the conducting foil are superimposed in a coaxial position before enclosing the corresponding winding core 7.
  • a sheet of insulating material is applied to the outer faces of each of the two conducting foils shown in Figure 9.
  • the insulating sheet 21 applied to the outside of the turns 9A, 9B effectively insulates, with respect to each other, the turns 9B, 9A superimposed with and adjacent to each other positioned between the two winding cores 7 when the transformer is assembled.
  • the transformer has at least four electrical connections towards the outside, formed by the projections 17D for electrical connection of the turns 9A, 9B and two pairs of connectors 13 for the wire F forming the winding on each winding core 7.
EP06425111A 2006-02-23 2006-02-23 Transformator und Schaltung mit solchem Transformator Not-in-force EP1826785B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT06425111T ATE480859T1 (de) 2006-02-23 2006-02-23 Transformator und schaltung mit solchem transformator
DE602006016723T DE602006016723D1 (de) 2006-02-23 2006-02-23 Transformator und Schaltung mit solchem Transformator
EP06425111A EP1826785B1 (de) 2006-02-23 2006-02-23 Transformator und Schaltung mit solchem Transformator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06425111A EP1826785B1 (de) 2006-02-23 2006-02-23 Transformator und Schaltung mit solchem Transformator

Publications (2)

Publication Number Publication Date
EP1826785A1 true EP1826785A1 (de) 2007-08-29
EP1826785B1 EP1826785B1 (de) 2010-09-08

Family

ID=36660173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06425111A Not-in-force EP1826785B1 (de) 2006-02-23 2006-02-23 Transformator und Schaltung mit solchem Transformator

Country Status (3)

Country Link
EP (1) EP1826785B1 (de)
AT (1) ATE480859T1 (de)
DE (1) DE602006016723D1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010051098A1 (en) * 2008-10-31 2010-05-06 General Electric Company Induction coil without a weld
DE102011075707A1 (de) * 2011-05-12 2012-11-15 SUMIDA Components & Modules GmbH Transformator mit geblechter Wicklung
CN105336482A (zh) * 2014-08-06 2016-02-17 群光电能科技股份有限公司 变压器结构
US9378883B2 (en) 2014-09-24 2016-06-28 Chicony Power Technologies Co., Ltd. Transformer structure
EP4322188A1 (de) * 2022-08-08 2024-02-14 Valeo eAutomotive Shenzhen Co., Ltd Transformator, gleichspannungswandler und fahrzeug

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109524219B (zh) * 2019-01-10 2021-08-20 台达电子企业管理（上海）有限公司 变压器及具有其的电源模块

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5763817A (en) 1980-10-06 1982-04-17 Mitsubishi Electric Corp Transformer
US5175525A (en) 1991-06-11 1992-12-29 Astec International, Ltd. Low profile transformer
US20020057178A1 (en) * 2000-11-15 2002-05-16 Alexander Timashov Bobbin for hybrid coils in planar magnetic components

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6759936B2 (en) * 2002-11-26 2004-07-06 Delta Electronics, Inc. Transformers using coil modules and related manufacturing method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5763817A (en) 1980-10-06 1982-04-17 Mitsubishi Electric Corp Transformer
US5175525A (en) 1991-06-11 1992-12-29 Astec International, Ltd. Low profile transformer
US20020057178A1 (en) * 2000-11-15 2002-05-16 Alexander Timashov Bobbin for hybrid coils in planar magnetic components

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 140 (E - 121) 29 July 1982 (1982-07-29) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010051098A1 (en) * 2008-10-31 2010-05-06 General Electric Company Induction coil without a weld
DE102011075707A1 (de) * 2011-05-12 2012-11-15 SUMIDA Components & Modules GmbH Transformator mit geblechter Wicklung
CN105336482A (zh) * 2014-08-06 2016-02-17 群光电能科技股份有限公司 变压器结构
US9378883B2 (en) 2014-09-24 2016-06-28 Chicony Power Technologies Co., Ltd. Transformer structure
EP4322188A1 (de) * 2022-08-08 2024-02-14 Valeo eAutomotive Shenzhen Co., Ltd Transformator, gleichspannungswandler und fahrzeug

Also Published As

Publication number Publication date
EP1826785B1 (de) 2010-09-08
DE602006016723D1 (de) 2010-10-21
ATE480859T1 (de) 2010-09-15

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