EP0354121A1 - Elektromagnetische Leistungsspule - Google Patents

Elektromagnetische Leistungsspule Download PDF

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Publication number
EP0354121A1
EP0354121A1 EP89402191A EP89402191A EP0354121A1 EP 0354121 A1 EP0354121 A1 EP 0354121A1 EP 89402191 A EP89402191 A EP 89402191A EP 89402191 A EP89402191 A EP 89402191A EP 0354121 A1 EP0354121 A1 EP 0354121A1
Authority
EP
European Patent Office
Prior art keywords
turns
winding
turn
axis
conductive
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
EP89402191A
Other languages
English (en)
French (fr)
Other versions
EP0354121B1 (de
Inventor
Michel Petit
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0354121A1 publication Critical patent/EP0354121A1/de
Application granted granted Critical
Publication of EP0354121B1 publication Critical patent/EP0354121B1/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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2804—Printed windings
    • 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
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • 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
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • H01F2027/065—Mounting on printed circuit boards

Definitions

  • the present invention relates to electromagnetic power windings and transformers comprising such windings generally used in electronic power circuits and in particular in electrical supplies of electronic circuits.
  • the winding comprises a support on which rests a set of conductive, independent, contiguous turns, covered with an insulating sheath and inside which a magnetic circuit can be introduced and on which are printed conductive tracks to achieve electrical continuity between each turn.
  • These conductive turns are bent on themselves towards the inside or the outside, depending on whether it is a self-inductance or a transformer, so as to form a box in which the circuit can be introduced.
  • magnetic for example a ferrite.
  • each of these conductive turns are located opposite one another and are produced so as to be able to rest on the support comprising an insulating and thermal conductive substrate; these ends also provide electrical continuity and thermal conduction with the insulating substrate to dissipate the heat transmitted by the turns during the passage of a current inside the winding.
  • the current densities used in the various applications, in particular in switching power supplies, are relatively high and problems of insulation voltage and coupling appear with the use of such windings.
  • the object of the invention is to remedy these drawbacks by modifying the shape of the turns and by proposing a particular interlacing of these turns.
  • the present invention relates to an electromagnetic power winding comprising conductive turns positioned on the same axis, each turn being independent, composed of a first set of turns (P1 to P n ) forming a primary winding and a second set (S1 to S n ) forming a secondary winding thus constituting a transformer, these turns resting on a support comprising an insulating and thermal conductive substrate and on which are printed conductive tracks making it possible to achieve electrical continuity between each turn, which, by these ends provide electrical continuity and thermal conduction with the substrate to dissipate the heat transmitted by the turns, the winding being characterized in that the ends of the first set of turns (P1 to P n ) are aligned on an axis and in that the ends of the second set of turns (S1 to S n ) are aligned on another axis, g owing to an arrangement of the turns allowing very good coupling to be obtained.
  • FIG. 1 there is shown a first application of the winding according to the invention. It concerns a first application of this winding as a transformer.
  • the winding comprises two sets of turns P1 to P n and S1 to S n positioned on the same axis, a magnetic circuit and a support.
  • the coil is constituted, on the one hand, by a first set of conductive turns P1 to P n connected in series by the support and on the other hand, by a second set of conductive turns S1 to S p connected in parallel by the support .
  • the winding behaves like a step-down or step-up transformer, the primary being for example constituted by the turns P1 to P n and the secondary by the turns S1 to S n .
  • These turns P1 to P n and S1 to S n are not obtained in a conventional manner by winding a single conductive wire around a core. They are produced by a set of conductors P1 to P n and S1 to S n all identical.
  • a turn 1 is shown in Figure 2. Each of these turns is curved on itself, so as to form, for example, a rectangle inside which can be introduced a magnetic circuit.
  • each of turns 3 and 4 are placed side by side and are made so that they can rest on the support to establish thermal and electrical contact.
  • the ends of each turn 3 and 4 are connected to the support 2 of Figure 1 so as to allow an electrical connection, for example it is a weld.
  • the shape and arrangement of the turns P1 to P n and S1 to S n have been designed so as to obtain a maximum insulation voltage by moving the ends of the primary and secondary turns away.
  • the assembly of the turns P1 to P n and S1 to S n allowing the constitution of the coil of the electromagnetic power winding, is carried out in the following manner: a turn is previously taken up with a deposit of electrical insulator, as shown in Figure 2, we juxtapose a second turn which we will have rotated 180 ° so that the ends of the second turn are opposite the ends of the first turn, we then take a third turn positioned behind the second but whose ends are found opposite the ends of the first turn. These turns are alternated until the winding is formed.
  • the support 2 comprises a substrate or printed circuit 6 and a cooling system, for example a radiator 7.
  • the substrate or printed circuit 6 is placed on the radiator and is integral therewith, it is an electrical insulating substrate, good thermal conductor.
  • a set of conductive tracks F1 to F n and G1 to G2 is printed or screen printed on the substrate 6 so that, when the coil is fixed on this substrate 6 and supplied, the current can flow through it. Indeed, at a given instant, the current arrives on the track F1, follows the first turn P1, then successively traverses the second track F2 and the turn P2 until the turn P n and the track F n .
  • the winding comprising a magnetic circuit, a current also passes through each of the turns S1 to S n ; these turns being mounted in parallel thanks to the conductors G1 and G2, one recovers on the conductors a current depending on the chosen transformation ratio.
  • the heat released by each turn S1 to S n and P1 to P n and by the magnetic circuit is transmitted to the substrate 6 longitudinally along these turns.
  • the substrate 6 is designed to allow the electrical connection between the turns and to advantageously capture the heat given off by the winding and transmit it to the radiator 7.
  • the electrical conductor that constitutes the turn also serves as a thermal conductor.
  • the substrate 6 is in this particular embodiment an alumina plate a few hundred microns thick.
  • the radiator 7 is known per se, it makes it possible to dissipate the heat released and thus to allow permanent cooling of the winding.
  • the magnetic circuit 8, 9 consists in our particular embodiment, of two boxes able to be introduced inside the winding and to wrap the turns when they are joined in order to capture the maximum flux.
  • FIG. 3 represents a sectional view of the circuit according to the invention. It makes it possible to show the movement of the heat flow over a turn via the arrows, represented in this figure, which indicate the movement of the flow during the passage of a current.
  • the present invention applies to any support for any surface mounting.
EP19890402191 1988-08-05 1989-08-02 Elektromagnetische Leistungsspule Expired - Lifetime EP0354121B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8810614 1988-08-05
FR8810614A FR2635225A1 (fr) 1988-08-05 1988-08-05 Bobinage electromagnetique de puissance

Publications (2)

Publication Number Publication Date
EP0354121A1 true EP0354121A1 (de) 1990-02-07
EP0354121B1 EP0354121B1 (de) 1993-11-10

Family

ID=9369154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890402191 Expired - Lifetime EP0354121B1 (de) 1988-08-05 1989-08-02 Elektromagnetische Leistungsspule

Country Status (3)

Country Link
EP (1) EP0354121B1 (de)
DE (1) DE68910606T2 (de)
FR (1) FR2635225A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0735551A1 (de) * 1995-03-29 1996-10-02 Valeo Electronique Transformatoreinrichtung, insbesondere für eine Versorgungseinrichtung von Entladungslampen in Kraftfahrzeugen
WO1998008237A1 (fr) * 1996-08-20 1998-02-26 Thomson-Csf Transformateur-redresseur t.h.t. pour montage en surface

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1184248A (fr) * 1956-10-12 1959-07-17 American Mach & Foundry Inducteur à plusieurs bobines
FR2476898A1 (fr) * 1980-02-22 1981-08-28 Mini Informatiq System Ste Eur Bobinage electromagnetique comportant des elements discrets et dispositif d'alimentation electrique comportant de tels bobinages
FR2556493A1 (fr) * 1983-12-09 1985-06-14 Inf Milit Spatiale Aeronaut Bobinage electromagnetique et transformateur comportant un tel bobinage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1184248A (fr) * 1956-10-12 1959-07-17 American Mach & Foundry Inducteur à plusieurs bobines
FR2476898A1 (fr) * 1980-02-22 1981-08-28 Mini Informatiq System Ste Eur Bobinage electromagnetique comportant des elements discrets et dispositif d'alimentation electrique comportant de tels bobinages
FR2556493A1 (fr) * 1983-12-09 1985-06-14 Inf Milit Spatiale Aeronaut Bobinage electromagnetique et transformateur comportant un tel bobinage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0735551A1 (de) * 1995-03-29 1996-10-02 Valeo Electronique Transformatoreinrichtung, insbesondere für eine Versorgungseinrichtung von Entladungslampen in Kraftfahrzeugen
WO1998008237A1 (fr) * 1996-08-20 1998-02-26 Thomson-Csf Transformateur-redresseur t.h.t. pour montage en surface
FR2752642A1 (fr) * 1996-08-20 1998-02-27 Thomson Csf Transformateur-redresseur t.h.t. pour montage en surface
US5991178A (en) * 1996-08-20 1999-11-23 Thomson-Csf VHV transformer/rectifier for surface mounting

Also Published As

Publication number Publication date
FR2635225A1 (fr) 1990-02-09
EP0354121B1 (de) 1993-11-10
FR2635225B1 (de) 1995-04-07
DE68910606T2 (de) 1994-03-17
DE68910606D1 (de) 1993-12-16

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