EP2602801A1 - Planarer und modularer transformator - Google Patents

Planarer und modularer transformator Download PDF

Info

Publication number
EP2602801A1
EP2602801A1 EP12194186.8A EP12194186A EP2602801A1 EP 2602801 A1 EP2602801 A1 EP 2602801A1 EP 12194186 A EP12194186 A EP 12194186A EP 2602801 A1 EP2602801 A1 EP 2602801A1
Authority
EP
European Patent Office
Prior art keywords
transformer
bobbin
transformer according
secondary winding
primary winding
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
EP12194186.8A
Other languages
English (en)
French (fr)
Other versions
EP2602801A8 (de
EP2602801B1 (de
Inventor
Davide Fantino
Vincenzo Giorgianni
Emanuele Musca
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.)
Marelli Europe SpA
Original Assignee
Magneti Marelli Powertrain 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 Magneti Marelli Powertrain SpA filed Critical Magneti Marelli Powertrain SpA
Publication of EP2602801A1 publication Critical patent/EP2602801A1/de
Publication of EP2602801A8 publication Critical patent/EP2602801A8/de
Application granted granted Critical
Publication of EP2602801B1 publication Critical patent/EP2602801B1/de
Active 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

Definitions

  • the present invention relates to a transformer of the type comprising at least one primary winding, at least one secondary winding, and a magnetic core that connects the primary winding magnetically to the secondary winding, and in which the primary winding is of the wire-type sort, whilst the secondary winding is formed by a planar element.
  • the primary winding is wound in a helix; such a configuration is affected, however, by considerable losses due to parasitic currents, above all in high-frequency applications.
  • the above structure varies each time according to the type of application, being more or less complex according to the number of primary and secondary windings envisaged.
  • One and the same type of spacer can in fact be set also on an outer side of one of the planar windings so that a further primary winding can be wound around it.
  • Producing a structure of this sort hence entails execution of a process that is always different according to the required configuration, and may consequently be even extremely complex and costly, above all for those configurations that envisage numerous windings.
  • the object of the present invention is to provide a transformer of the type referred to above, which will present efficiency of operation higher than that of transformers of a known type. Moreover, a further object of the present invention is to provide a transformer with modular structure, at a contained cost.
  • the transformer described herein designated as a whole by the reference number 10, comprises at least one primary winding 2, at least one secondary winding 4, and a ferromagnetic core 6 that connects the primary winding magnetically to the secondary winding.
  • the primary winding 2 is of the wire-type sort
  • the secondary winding 4 is formed by a planar element made of electrically conductive material; in various embodiments, as in the one illustrated, the aforesaid element forms as a whole a turn and has a substantially rectangular cross section, the longer side of which is set substantially parallel to the plane containing the turn.
  • the primary winding is formed by a wire - i.e., by an elongated element made of electrically conductive material - with a substantially circular cross section, which is wound in a spiral along the secondary winding.
  • the wire is preferably coated with a sheath of insulating material; for example, it is enamel painted with insulating material or else coated with a proper insulating sheath so that it can be wound on itself in turns in contact with or in any case very close to one another; as primary winding it is hence possible to use a normal electrical cable, of the type widely available on the market.
  • the transformer comprises at least one bobbin element 8 having:
  • the two end portions of the bobbin element each carry a secondary winding, i.e., the turn with planar cross section, whilst the wire of the primary winding is wound in a spiral around the central portion, along at least one of the two facing plane surfaces.
  • the two plane surfaces 12a, 12a' are at a distance apart D that is such as to prevent overlapping of said wire in the axial direction of the spiral formed by it.
  • the bobbin element 8 has an opening 14 that traverses the central portion and both of the end portions 12, in a direction substantially coinciding with the axis of the three windings carried by the bobbin element, and is prearranged, as may be seen from the figures, to receive a column 6' of the ferromagnetic core.
  • the end portions 12 are both formed by a disk made of insulating material with a hole at the centre, within which the respective secondary winding is embedded, whilst the central portion is constituted by a tubular element, once again made of insulating material, on the opposite ends of which are respectively fixed, in a region corresponding to their central holes, the two disk-shaped end portions.
  • the bobbin element described above enables provision of a completely modular transformer structure, in which said element constitutes a single module that can be repeated any number of times, according to the application for which the transformer is designed.
  • the individual elements are prearranged for being stacked on top of one another, on the central column of the ferromagnetic core, by which the respective central openings 14 of said elements are traversed.
  • Figure 1 illustrates an example of transformer with three elements 8 stacked on top of one another.
  • the number of turns of the primary winding can vary according to the application required, and likewise differ between the bobbin elements that make up the transformer; in the same way, one or more bobbin elements of the transformer may present the secondary winding even on just one of the two end portions 12.
  • the secondary windings and, likewise, the primary windings of the resulting ensemble may then be connected in series and/or in parallel.
  • the ferromagnetic core is formed by two distinct parts 6a, 6b separated in a plane P that is transverse to the column 6' of the core that carries the elements 8 and that cuts or delimits one end of said column.
  • the two parts of the transformer are first separate so that it is possible to arrange the elements 8 on the column 6', and then said parts are coupled so as to close said elements within the ring structure formed thereby.
  • a transformer of the type described herein can be used in a DC-DC converter, designed to convert a direct-current source from one level or value of voltage to another.
  • DC-DC converters are extremely widespread in the automotive sector, for example for electric cars, where it is frequently necessary for said converter apparatuses to be bidirectional, making the conversion between one side at a higher voltage level and one side at a lower voltage level in both directions.
  • two electrical wiring systems namely, an electrical wiring system of a traditional type for loads such as the lights or the electronic control unit of the thermal engine and a high-voltage wiring system for the electric engine, which can operate, for example, at a voltage of around 600 V.
  • systems for conversion of energy are needed, preferably bidirectional ones, which set the two wiring systems in communication, in particular for transferring energy from the high-voltage wiring system supplied by a specific battery, for example a lithium-ion battery, to the conventional wiring system at a lower voltage.
  • a specific battery for example a lithium-ion battery
  • the transformer described herein can preferably be assembled according to a so-called "central tap" configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
EP12194186.8A 2011-12-05 2012-11-26 Planarer und modularer transformator Active EP2602801B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001114A ITTO20111114A1 (it) 2011-12-05 2011-12-05 Trasformatore planare e modulare a filo

Publications (3)

Publication Number Publication Date
EP2602801A1 true EP2602801A1 (de) 2013-06-12
EP2602801A8 EP2602801A8 (de) 2013-07-24
EP2602801B1 EP2602801B1 (de) 2015-07-15

Family

ID=45420859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12194186.8A Active EP2602801B1 (de) 2011-12-05 2012-11-26 Planarer und modularer transformator

Country Status (2)

Country Link
EP (1) EP2602801B1 (de)
IT (1) ITTO20111114A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014105164U1 (de) 2013-12-31 2014-11-11 Wen-Hsiang Wu Li Modularisierte Planarwindung und Planartransformator, der diese verwendet
DE202014105168U1 (de) 2013-11-26 2014-11-13 Wen-Hsiang Wu Li Planarwicklungsmodul und Planartransformator, der dieses verwendet
DE202014105167U1 (de) 2013-12-31 2014-11-13 Wen-Hsiang Wu Li Modularisierte Planarwindungslage und Planartransformator, der diese verwendet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6522233B1 (en) * 2001-10-09 2003-02-18 Tdk Corporation Coil apparatus
US20070273465A1 (en) * 2006-05-26 2007-11-29 Delta Electronics, Inc. Transformer
US20080211613A1 (en) * 2006-05-26 2008-09-04 Delta Electronics, Inc. Transformer
US20100127813A1 (en) 2008-11-26 2010-05-27 Mizuki Utsuno Inductance part

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6522233B1 (en) * 2001-10-09 2003-02-18 Tdk Corporation Coil apparatus
US20070273465A1 (en) * 2006-05-26 2007-11-29 Delta Electronics, Inc. Transformer
US20080211613A1 (en) * 2006-05-26 2008-09-04 Delta Electronics, Inc. Transformer
US20100127813A1 (en) 2008-11-26 2010-05-27 Mizuki Utsuno Inductance part

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014105168U1 (de) 2013-11-26 2014-11-13 Wen-Hsiang Wu Li Planarwicklungsmodul und Planartransformator, der dieses verwendet
DE202014105164U1 (de) 2013-12-31 2014-11-11 Wen-Hsiang Wu Li Modularisierte Planarwindung und Planartransformator, der diese verwendet
DE202014105167U1 (de) 2013-12-31 2014-11-13 Wen-Hsiang Wu Li Modularisierte Planarwindungslage und Planartransformator, der diese verwendet

Also Published As

Publication number Publication date
ITTO20111114A1 (it) 2013-06-06
EP2602801A8 (de) 2013-07-24
EP2602801B1 (de) 2015-07-15

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