EP1620867B1 - Transformator - Google Patents

Transformator Download PDF

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Publication number
EP1620867B1
EP1620867B1 EP03816858A EP03816858A EP1620867B1 EP 1620867 B1 EP1620867 B1 EP 1620867B1 EP 03816858 A EP03816858 A EP 03816858A EP 03816858 A EP03816858 A EP 03816858A EP 1620867 B1 EP1620867 B1 EP 1620867B1
Authority
EP
European Patent Office
Prior art keywords
primary
transformer
coil
primary part
contact pins
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
EP03816858A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1620867A1 (de
Inventor
Reinhold Schulz
Hans-Jürgen MANS
Michael Becks
Andreas Kniesel
Peter Grad
Wolfgang LÖDDE
Olaf BLÖMKER
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.)
Friwo Mobile Power GmbH
Original Assignee
Friwo Mobile Power GmbH
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 Friwo Mobile Power GmbH filed Critical Friwo Mobile Power GmbH
Publication of EP1620867A1 publication Critical patent/EP1620867A1/de
Application granted granted Critical
Publication of EP1620867B1 publication Critical patent/EP1620867B1/de
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
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • 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
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/6608—Structural association with built-in electrical component with built-in single component
    • H01R13/6633—Structural association with built-in electrical component with built-in single component with inductive component, e.g. transformer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6675—Structural association with built-in electrical component with built-in electronic circuit with built-in power supply

Definitions

  • the present invention relates to a transformer with a bobbin on which at least a primary coil and a secondary coil is accommodated.
  • Transformers of the above mentioned type are used, for example, to supply high-volume consumer products with low voltage.
  • such transformers are encased in a housing made of a plastic material, which corresponds to a fire protection class UL94-V1 or better.
  • a housing made of a plastic material which corresponds to a fire protection class UL94-V1 or better.
  • insulation materials are relatively expensive. Many manufacturers therefore strive to minimize the use of these high-quality materials.
  • a second cover made of a fire protection material is provided to isolate a transformer in addition to a main housing made of a simple material.
  • the second cover encloses a portion of a primary coil of the transformer and connecting pins extending from the primary winding.
  • This arrangement is relatively expensive, in particular with regard to the installation of the transformer.
  • the power supply becomes larger and heavier due to the additional second cover.
  • transformers are known whose bobbins each consist of a primary and a secondary part and in which the primary coil is partially covered by the secondary part of the bobbin insulating.
  • the object is achieved by a transformer according to claim 1. Embodiments are defined in the dependent claims.
  • Figure 1 shows a perspective view of a primary part 4 and a secondary part 5 of a transformer according to a first embodiment of the present invention Invention.
  • the primary part 4 and the secondary part 5 are formed in the first embodiment of the invention, as shown in Figure 1, as separable parts and together form a bobbin 1 from.
  • the primary part 4 has approximately the shape of an "H” in cross section.
  • the left-hand section of the "H” shown in FIG. 1 forms a connection section 42 of the primary part 4, which has a connection region 7 for AC contact pin contacting in its upper region.
  • the middle region of the "H” has an approximately rectangular winding body with rounded corner areas.
  • the winding body serves to receive a primary coil 2 wound thereon.
  • the section of the "H” shown on the right in FIG. 1 forms a winding body boundary 13 for the winding body of the primary part 4 on this side. It has a larger diameter d than the wound body with the primary coil 2 wound thereon.
  • the primary part 4 is hollow inside.
  • an inner opening 45 of the primary part 4 has an approximately rectangular cross-section.
  • the inner opening 45 is later used to receive an iron core (not shown in Figure 1).
  • the portion of the "H" shown on the left in FIG. 1 is formed with an inner diameter D which is larger than the outer diameter d of the winding body boundary 13 of the primary part 4.
  • He further has a width B, which corresponds approximately to a width b of the bobbin and the winding body boundary of the primary part 4.
  • the section of the secondary part 5 shown on the left in FIG. 1 later forms a covering region 6 for the primary coil 2 of the primary part 4.
  • the covering region 6 has insulating parts 11 for AC contact pins (not shown in FIG. 1).
  • the insulating parts 11 extend approximately at an angle of 90 ° to the diameter extension direction D of the secondary part 5.
  • the insulating parts 11 have in the embodiment shown an approximately rectangular inner cross section and are formed to cover the AC contact pins or the connecting portion to the contact pins inside hollow. In other embodiments of the invention, not shown, the insulating parts 11 may also have a round, elliptical or other polygonal cross-section, preferably in adaptation to the contact pins to be insulated.
  • the secondary part 5 further has a central region of the "H", which serves as a wound body, on which a secondary coil 3 is wound.
  • the bobbin of the secondary part 5 has, similar to the bobbin of the primary part 4, an approximately rectangular cross-section with rounded corner areas and has an inner opening 14 for receiving an iron core (not shown in Figure 1).
  • the section of the "H" of the secondary part 5 shown on the right in FIG. 1 forms a winding body boundary 15 for the secondary coil 3.
  • the wound body boundary 15 has a larger diameter than the diameter of the wound body with the secondary coil 3 of the secondary part 5.
  • connection areas 16 are provided for connection to DC contact pins 17.
  • Both the base material for the bobbin 1, as well as the cover 6 and the insulating parts 11 of the secondary part 5 are made of a fire protection material of fire protection class UL94-V1 or better.
  • the windings of the primary coil 2 and the secondary coil 3 are made of a metallic material, e.g. Copper.
  • the contact pins are also made of a metallic material, e.g. Bronze, trained.
  • FIG 2 shows a perspective view of a completed transformer assembly 18 according to the first embodiment of the present invention.
  • the transformer assembly shown is formed by an assembly of the primary part 4 and secondary part 5 shown separately in Figure 1.
  • the cover area covers this 6 of the secondary part 5, the primary coil 2 of the primary part 4.
  • the insulating parts 11 of the secondary part 5 cover the respective connecting portions 7 of the primary part 4 from.
  • the insulating parts 11 were also pushed onto the connecting regions 7 during assembly, so that they encase them, except for the contact region.
  • the insulating parts 11 are used both for electrical insulation of the connection regions 7 and, as a result of the fire protection material used, as fire protection for the connection regions 7.
  • the completed transformer assembly 18 has a compact construction. Since dangerous current-carrying regions, such as the primary coil 2 and the connecting regions 7, are covered by the cover 6 and the insulating parts 11, the transformer assembly can be used in the form shown in FIG. 2 without the use of an additional fire protection housing and satisfies the fire protection requirements despite its simple structure in a variety of countries.
  • the bobbin 1 consisting of two halves assumes a double function. On the one hand he takes on the wire windings of the primary coil 2 and the secondary coil 3. On the other hand, the bobbin 1 fulfills the fire protection housing function required from the standard view, whereby a use of additional plastic covers or housing parts can be eliminated or reduced. By minimizing the use of materials, the transformer can be manufactured with a light weight. From Figure 1, the parts a transformer assembly in the unassembled state, and from Figure 2, which shows the transformer assembly after assembly, it can be seen that a simple sliding of the secondary part 5 is sufficient to the primary part 4, to assemble the transformer assembly.
  • FIG. 3 shows a perspective sectional view of a completed floor assembly 12 with a transformer assembly 18 according to the first embodiment of the present invention.
  • an iron core 20 is inserted into the transformer assembly 18 shown in FIG. 2, an iron core 20 is inserted. Furthermore, the transformer assembly 18 is installed in a housing 21 made of a conventional plastic material. From one of the housing 21 angularly projecting contact portion 22 protrude two contact pins 8. The contact pins 8 are passed through the contact portion 22 of the housing 21 and with the primary part 4 of the transformer assembly 18 in electrical connection. The contact pins 8 are AC contact pins intended to connect the transformer assembly 18 to a power outlet (not shown) in use, thereby to supply the transformer assembly 18 with AC voltage.
  • the bottom group shown in Figure 3 is protected by fire protection technology.
  • the contact pins 8 shown in Figure 3 are elongated with a round cross-section and thus correspond to a contact pin standard typically used in Europe, except in the United Kingdom. However, the present invention is not limited to such contact pins 8. Instead, other forms of contact pins or more than two contact pins may be used in the present invention.
  • FIG. 4 shows a perspective view of a primary part 24 and a secondary part 25 according to a second embodiment of the present invention.
  • the primary part 24 is formed separately from the secondary part 25 in the shown unassembled transformer.
  • the primary part 24 forms a bobbin 41 together with the secondary part 25.
  • the primary part 24 of the second embodiment of the invention is, similar to the primary part 4 of the first embodiment of the invention, constructed of a connecting portion 26, a winding body 27 and a winding body 28 limit.
  • the connecting section 26 has two connecting regions 9, via which a connection to the contact pins 8 is produced.
  • the contact pins 8 are covered in the connecting regions 9 to the primary part 24, for example by an encapsulation.
  • the encapsulation material used is a plastic, preferably a plastic of the fire protection class UL94-V1. By encapsulation, the contact pins 8 are fixed in position relative to the primary part 24 and electrically insulated to the outside. However, instead of overmolding, encapsulation or another covering of the connection regions 9 can also be used.
  • the contact pins 8 in Figure 4 are plate-shaped, perforated contact pins, which are chamfered in a front region at the corners. They correspond to a contact pin standard used, for example, in the USA, China and Japan. Instead of these contact pins, however, other forms of contact pins, for example, with a round cross-section, can be used. Instead of the two contact pins, only one contact pin or more than two contact pins can be provided.
  • the primary part 24, following the connection section 26, has the winding body 27 with a primary coil 32 wound thereon. At the winding body 27, a winding body boundary 28 connects.
  • the secondary part 25 has a covering region 29, which is pushed onto the primary coil 32 of the primary part 24 when the coil body 41 is mounted.
  • the cover region 29 has, similar to the secondary part 5 of the first embodiment of the invention, insulating parts 44 for covering the connecting regions 7 of the primary part 24. These are pushed upon mounting of the bobbin 41 on the respective connecting portions 7 of the primary part 24, so that they envelop them.
  • the insulating parts 44 like the cover region 29, are made of a plastic material, preferably a fire protection material of the fire protection class UL94-V1, and thus not only form an electrical insulation but also fire protection for the connection regions 9 after the coil body 41 has been assembled.
  • the cover region 29 is followed by a winding body 30, on which a secondary coil 33 is wound.
  • the wound body 30 is subsequently bounded by a winding body limiter 31.
  • At the bobbin boundary 31 are contact areas for DC contact pins 43rd
  • Figure 5 shows a perspective view of a transformer according to a third embodiment of the present invention.
  • a transformer assembly such as the transformer assembly 1 of the first embodiment of the invention, is installed in a housing 36. From the housing 36 project pins 8, which are within the housing 36 with the primary part 4 of the transformer in electrical connection.
  • the contact pins 8 have an electrical insulation 37, which encloses at least one edge region of the contact pins 8 within the housing 36.
  • the insulation 37 is made of plastic, preferably a plastic of fire protection class UL94-V1 or better.
  • the contact pins 8 are connected in the interior of the housing 36 with the primary part 4 of the bobbin 1 by means of a disposable connector.
  • the disposable connector is plugged once during assembly of the transformer and is in the following, also by strong tensile forces, such. B. 50 N, not or very difficult to solve again.
  • An example of the disposable connector 10 is shown in Figure 6.
  • the disposable connector 10 is formed so that the contact spring 46 is pushed onto the round contact pin 8. By this joining process, the contact spring 46 is widened. The restoring force of the contact spring 46 and the friction between the contact spring 46 and contact pin 8 cause that the connection can be solved only by applying force.
  • the disposable connector 10 is a safety connector, by means of which the contact pins 8 are fixed even when the outer device housing is damaged, for example, by shock or misuse, in their position and protected against contact by a user. Even if there is damage to the outer housing 36, the remaining unit, consisting of the contact pins 8 and the bobbin 1 of the transformer, without danger of the user from a wall outlet can be removed because the user can not touch live and thus dangerous parts.
  • the transformer of the present invention is formed in two parts in the described embodiments, this is not required for the third embodiment of the invention.
  • the transformer may also be formed with a one-piece bobbin having a primary part on which the primary coil is accommodated and a secondary part on which the secondary coil is accommodated.
  • the fire protection function is ensured in this case by additional plastic parts or bands.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Housings And Mounting Of Transformers (AREA)
EP03816858A 2003-05-06 2003-05-06 Transformator Expired - Lifetime EP1620867B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2003/004760 WO2004100192A1 (de) 2003-05-06 2003-05-06 Transformator

Publications (2)

Publication Number Publication Date
EP1620867A1 EP1620867A1 (de) 2006-02-01
EP1620867B1 true EP1620867B1 (de) 2006-09-27

Family

ID=33426929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03816858A Expired - Lifetime EP1620867B1 (de) 2003-05-06 2003-05-06 Transformator

Country Status (6)

Country Link
US (1) US7764157B2 (zh)
EP (1) EP1620867B1 (zh)
CN (1) CN100530456C (zh)
AU (1) AU2003232732A1 (zh)
DE (1) DE50305218D1 (zh)
WO (1) WO2004100192A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100647227B1 (ko) 2005-08-17 2006-11-23 주식회사 모빌일렉트론 이원화된 소형 트랜스
US8021198B2 (en) 2008-06-06 2011-09-20 Apple Inc. Low-profile power adapter
US7896702B2 (en) 2008-06-06 2011-03-01 Apple Inc. Compact power adapter
US8021183B2 (en) 2008-10-31 2011-09-20 Apple Inc. Cold headed electric plug arm
US8934261B2 (en) * 2008-12-23 2015-01-13 Apple Inc. Compact device housing and assembly techniques therefor
TW201118894A (en) * 2009-11-16 2011-06-01 Delta Electronics Inc Magnetic assembly, assembly method thereof and combination structure of magnetic assembly and circuit carrier
CN101834049B (zh) * 2010-04-27 2011-12-07 东莞国亮电机有限公司 漆包铝线绕组及其制备方法
JP5804628B2 (ja) * 2011-07-06 2015-11-04 Tdk株式会社 コイル部品
WO2016051481A1 (ja) * 2014-09-30 2016-04-07 三菱電機株式会社 回転電機、及びその回転電機の製造方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1240795A (en) * 1969-02-12 1971-07-28 Hinchley Engineering Company L Transformer bobbins
GB1250827A (zh) * 1969-06-16 1971-10-20
US3663914A (en) * 1971-06-14 1972-05-16 Western Electric Co Bobbin wound coil assembly and electrical terminals therefor
US3711806A (en) * 1972-01-03 1973-01-16 Dormeyer Ind Inc Power pack
US4205291A (en) * 1977-03-14 1980-05-27 A. F. Dormeyer Manufacturing Co., Inc. Heavy duty converter
US4324865A (en) * 1981-04-17 1982-04-13 Stauffer Chemical Company Polyurethane foams having low discoloration
US4944975A (en) 1988-10-03 1990-07-31 E. I. Du Pont De Nemours And Company Composite coil forms for electrical systems
US4954940A (en) * 1988-10-14 1990-09-04 Chandler Bill B Plug in power converter structure
JPH03222309A (ja) * 1990-01-26 1991-10-01 Musashino Tsuukou Kk 二重絶縁構造トランスおよびその組立方法
US6344786B1 (en) * 2000-10-06 2002-02-05 Artesyn Technologies, Inc. Telescoping bobbin

Also Published As

Publication number Publication date
WO2004100192A1 (de) 2004-11-18
US7764157B2 (en) 2010-07-27
CN1768399A (zh) 2006-05-03
DE50305218D1 (de) 2006-11-09
CN100530456C (zh) 2009-08-19
EP1620867A1 (de) 2006-02-01
US20070126545A1 (en) 2007-06-07
AU2003232732A1 (en) 2004-11-26

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