EP1693860B1 - Transformateur à chambres multiples - Google Patents

Transformateur à chambres multiples Download PDF

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Publication number
EP1693860B1
EP1693860B1 EP20060003265 EP06003265A EP1693860B1 EP 1693860 B1 EP1693860 B1 EP 1693860B1 EP 20060003265 EP20060003265 EP 20060003265 EP 06003265 A EP06003265 A EP 06003265A EP 1693860 B1 EP1693860 B1 EP 1693860B1
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EP
European Patent Office
Prior art keywords
transformer
coil
coil formers
formers
wall
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.)
Not-in-force
Application number
EP20060003265
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German (de)
English (en)
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EP1693860A1 (fr
EP1693860B8 (fr
Inventor
Marco Faccin
Felix Dr. Franck
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.)
Osram GmbH
Osram SpA
Original Assignee
Osram GmbH
Osram SpA
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Filing date
Publication date
Priority claimed from EP05425091A external-priority patent/EP1693859A1/fr
Application filed by Osram GmbH, Osram SpA filed Critical Osram GmbH
Priority to EP20060003265 priority Critical patent/EP1693860B8/fr
Publication of EP1693860A1 publication Critical patent/EP1693860A1/fr
Publication of EP1693860B1 publication Critical patent/EP1693860B1/fr
Application granted granted Critical
Publication of EP1693860B8 publication Critical patent/EP1693860B8/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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
    • H01F5/02—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
    • 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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H01F2027/297—Terminals; Tapping arrangements for signal inductances with pin-like terminal to be inserted in hole of printed path

Definitions

  • the present invention relates to (electrical) transformers.
  • Transformers are used in several areas e.g. in power supply units for halogen lamps, wherein an input line voltage (e. g. the typical 220-240 volt mains voltage of most European countries, while 100 - 120 volts are typical values for many American countries) is transformed into an output voltage of 6, 12 or 24 volts. Transformers are also frequently used as output isolating transformers in electronic converters for halogen lamps to produce a 12 volt output voltage.
  • an input line voltage e. g. the typical 220-240 volt mains voltage of most European countries, while 100 - 120 volts are typical values for many American countries
  • Transformers are also frequently used as output isolating transformers in electronic converters for halogen lamps to produce a 12 volt output voltage.
  • Symmetric three-chamber winding structures offer a number of distinct advantages over conventional two-chamber windings. These advantages include, e.g., a significant reduction of proximity losses within the windings, a flux equilibrium within the core (which nulls the magnetic field in the outer leg(s) of the core and thus reduces the core losses), a higher quality factor of the leakage inductance (up to 70) due to the symmetrical field distribution which enables such a transformer to be used as real resonance inductor for soft-switching circuits, and finally a reduced electromagnetic noise emission.
  • three windings i.e. three coils
  • the same power can be transferred by using a core of smaller size.
  • plastic moulded coil formers are available with three or more insulated chambers available, in a layered structure. This leads to having thin coils coaxially nested within each other arranged around the centre leg of the core, single coils being sometimes one-layer coils. Transformer arrangements including three windings (or more) are not exempt from problems such as, e.g.
  • US 5 534 839 A discloses a miniature transformer with three coil formers, which are assembled in a way that the first coil former receives the second and third coil former in the open opposite ends. An E-shaped core is received in the open ends of the second and third bobbin. The whole construction is unsymmetric.
  • the object of the present invention is thus to provide a transformer adapted to fully satisfactorily meet the requirements set forth in the foregoing. According to the present invention, that object is achieved by means of a transformer having the features set forth in the claims that follow.
  • the claims form an integral part of the disclosure of the invention provided herein.
  • a particularly preferred embodiment of the invention enables the economical, reliable, modular, and reproducible mass production of transformers with more than two hermetically insulated winding chambers by the combination of a "disc-like" structure with the multi-winding concept.
  • a symmetrical three-chamber transformer can thus be realized which is symmetrical even in respect of parasitics: the winding resistances of the two "halves" of one coil are equal, and the cross-winding capacitances between each "half' of the first winding/coil and the second coil are similarly equal. This is primarily due to the same winding diameter and thus the same length and sorting of the wires within each "half' coil.
  • the exemplary embodiments of a transformer described herein have in common the basic feature of including a plurality of coil formers generally indicated 200, 300, and 400 in figures 2 to 4 .
  • the designation "coil former” is primarily intended to highlight the role these elements play both in providing winding chambers for respective windings ("coils") and in jointly forming the winding of the transformer.
  • coil former 400 of figures 2 and 4 is shown without the respective winding wound thereon.
  • three coil formers 200, 300, and 400 of figure 3 are shown after being provided with respective windings. While assemblies comprised of two and three coil formers are described herein by way of example, those of skill in the art will promptly appreciate that the arrangement described herein may be extend to include also four coil formers or more, i.e. any number in a plurality of coil formers.
  • Each coil former is essentially comprised of a ring-shaped body of an electrically insulating material (of any type currently used to produce bobbins for transformers) having wound thereon a winding (or “coil”) of electrically conductive wire such as e.g. copper wire.
  • a plurality of coil formers are arranged side-by-side on a common core.
  • This is typically comprised of one of the legs (usually the main, central leg) of a ferromagnetic (e.g. ferrite) core of any of the types listed in the introductory portion of the description.
  • the "winding room” describes the space within one individual coil former 200, 300, and 400 that is actually filled up by its coil 290, 390, 490.
  • the "winding chamber” 298, 398, 498 is the assembly remaining free of any metal, ferrite, or plastic portion after mounting the corresponding coil former into the complete insulation arrangement, and must be larger than or at least equal to the corresponding winding room.
  • the “winding space” finally is the notionally infinite disc, starting from the tubular wall portions (see e.g. the portions indicated as 202, 302, 402 in several of the figures of the attached drawing) of the coil formers 200, 300, and 400 as seen from the unmounted individual coil formers between its two flange walls (see e.g. the flange walls 412, 413 of the coil former 400 shown in figure 2 ).
  • the winding space is thus a space notionally heading to infinity in each direction orthogonally to the winding axis, thus having a "thickness" of the distance between its two flange walls.
  • the winding space essentially defines the space required for winding the coil onto the individual unmounted coil former.
  • each coil former 200, 300 and 400 provides an insulation arrangement consisting of plastic moulded material (such as e.g. Polyamide, Polycarbonate, or Polybutylene-Terephtalate) with a resistivity of at least 3*10 9 Ohm*cm for transformers with two-part E, EF*, EP, EFD, EV*, E-I, U, UR, or U-I cores.
  • plastic moulded material such as e.g. Polyamide, Polycarbonate, or Polybutylene-Terephtalate
  • the bobbin portion also includes a cover cap designated 100 as a whole.
  • the cover cap 100 includes a partial (i.e. apertured) top wall or a closed top wall of the same sufficient thickness or of an even smaller thickness (see e.g. the elements 24 and 25 of figure 5 ).
  • the cap 100 is thus adapted to contain a plurality of coil former elements 200, 300, and 400 matching perfectly to each other as better detailed in the following.
  • the cover cap provides lateral walls (see walls 5, 6, 7, and 8 of figures 5, 6 , and 9 ) of sufficient extension above the circuit supporting substrate or "bench” (such as the PCB shown in figure 1 ) reaching closely down to this substrate and thus covering the pins of the arrangement.
  • the various coil former elements will form sufficient thickness through insulation, creep age, and clearance distances between their winding chambers 298, 398, 498 and between each individual winding chamber and the lateral (and - if necessary - the top) surrounding free space by means of adequate labyrinth shapes at the border surfaces between the insulating elements.
  • These will consist of at least two individual coil formers (the number of the coil formers 200, 300, and 400 will be one less than the total number of all insulating elements) with substantially the form of hollow spindles. These provide the insulation between the individual coils and the core by completely covering one leg of the ferromagnetic (e.g. ferrite) core 3, 4. As indicated, this will generally be the central leg or the most compact leg of a core of e.g. any of the core types indicated in the introductory portion of the description. Specifically, insulation with respect the core is provided by the central tubular portions 202, 302, and 402.
  • the assembly process of the transformer described herein thus provides for at least two coil formers 200, 300 and 400 being arranged directly side by side onto the same leg of the core 3, 4. Each individual coil former can thus be provided with its coil before the insulation arrangement is assembled in order to build the complete transformer.
  • At least one of the coil formers 200, 300, and 400 has at least one horizontal or three-dimensional portion associated with its flange walls extending outwardly of its winding space. These protruding portions are configured in such a way as to extend into the winding space of at least one of the neighbouring coil formers.
  • These protruding portions can be in the form of pin stands 203, 204, 306, 309, 403, 404. As better detailed in the following, these pin stands may be configured in such a way that the winding wires itself build the corresponding terminal pins (see figure 12 ).
  • the lower side of the coils near the common circuit supporting substrate (PCB) - in other words the bench side of the coils - stands significantly closer to the circuit substrate than e.g. half the maximum required creep age (in the lower portion of figure 1 ) without protruding completely to and through the circuit support.
  • PCB common circuit supporting substrate
  • the bench side of the coils - stands significantly closer to the circuit substrate than e.g. half the maximum required creep age (in the lower portion of figure 1 ) without protruding completely to and through the circuit support.
  • lower flange walls such as e.g. 215, 314, 414 that have extensions 225, 305, 405 that are configured as protruding portions that extend into the winding space of at least one of the neighbouring coil formers to build parts of the insulation barriers between any neighbouring winding chambers.
  • the extensions in question are in the form of bench walls that extend essentially in the directions of the "bench” or PCB to provide the sufficient creep age and clearance distances between two neighbouring winding chambers.
  • these bench walls correspond to lower flange walls such as e.g. 215, 314, or 414 being "bent” at the lower edge of the insulation barrier outwardly from the corresponding coil former by 90°.
  • These bench walls extend horizontally with a sufficient thickness below the winding rooms of the neighbouring coil former, i.e. between the bench side of the neighbouring coil and the circuit substrate (PCB), and the at least one neighbouring unbent flange wall has been shortened by that thickness necessary for passing through of the bench wall(s).
  • This arrangement substitutes the conventional solution of heading vertically the side and/or flange and/or H-separating walls against the circuit supporting substrate. In that way the possibility exists of avoiding that the transformer should stand "higher” than necessary, while also avoiding the need of forming a cut through the circuit substrate exactly at the position(s) of the lower flange and/or H-separating wall(s) of the coil formers.
  • the coil former portions (be these pin stands and the bench walls just described) that protrude into the winding space of the neighbouring coil former are preferably formed as a single moulded piece with the relative coil former.
  • a core such as a two-part core 3, 4
  • the circuit supporting substrate i.e. the PCB
  • all the surfaces where the insulating arrangement touches the core or comes into close proximity to it are provided with a sufficient wall thickness - see references 19 to 21, 202, 302, 402, and partially 212, 213, 312, 313, 412, 413.
  • any of the at least two separate winding chambers 298, 398, 498 and the core there exist sufficient creep age and clearance distances.
  • the cover cap 100 covers all the individual coil formers together at their outer lateral sides closely down to the circuit supporting substrate PCB and at their top sides (at least partially or - if necessary - completely).
  • the cover cap 100 which is preferably comprised of a single moulded piece of insulating (e.g. plastics) material, has continuous side walls and a - possibly apertured - top wall 24, 25.
  • a part of these walls, named side walls in the following (see e.g. the walls designated 5, 6, 20, 21), extend parallel to the centre leg or the most compact leg of the core 3, 4, while other of these walls named face walls are orthogonal to that leg (see e.g. lower face walls designated 7, 8) and are in fact traversed by that leg of the core (see e.g. the upper face walls designated 260, 270, 24, 25).
  • the cap 100 has a central horizontal, ring-shaped shoulder wall 19 with outer dimensions at least equal or even bigger than the outer dimensions of the core, which carries the shoulders and the outer legs of the core.
  • the shoulder wall extends parallel to the mounting substrate (PCB) and surrounds the whole area where the windings are located.
  • the shoulder wall 19 has a hole with dimensions roughly defined by the four outer corners of the two winding windows of the core 3, 4, which provides the protrusion of the coils and the portions of the coil formers inside and above the core through said shoulder wall 19.
  • this hole has to be reduced exactly by the thickness of the upper side walls 20, 21, and traversed upper face walls 260, 270, 24, 25, to enable them to be connected closely and stable with the shoulder wall 19; all these wall parts complete the winding chambers 298, 398, 498 of the coil formers inside the winding windows and above the core.
  • the ring-shaped shoulder wall 19 supports the downwardly extending lower side walls 5, 6 and lower face walls 7, 8. These skirt walls 5, 6, 7, 8 extend in the space between the core and the circuit substrate covering the pin stands and the bench walls if present.
  • the walls 5, 6, 7, 8 can thus be positioned at the same locations as the upper side and upper face walls of the cap 100 or at any other outer locations up to the outer dimensions of the central shoulder wall 19.
  • the cover cap 100 provides the required insulation both between any of the winding chambers 298, 398, 498 at their adjacent inner sides and between these chambers and the core and the free space above the circuit substrate on its outer side (see especially figures 5 and 6 ).
  • the insulation between the at least two separate winding chambers 298, 398, 498 is provided by the joint action of the flange walls 212, 213; 312, 313; and 412, 413 (including the lower flange walls 214, 215, 314, 315, 414, 415 together with the possible extensions represented by the "bench walls" 225, 305, 405) of the coil formers 200, 300, 400 plus complementary walls extending from the inner side of the cover cap 100.
  • these include walls 15, 16, 17, 18, 26, 27, 28, 29, 30 and 31 that, as best shown in figures 7 and 8 , penetratingly engage (in a labyrinth-like fashion) corresponding receiving grooves formed between adjacent flange walls of the coil formers.
  • the walls in question may have an outwardly directed taper (see especially figure 8 ) mirrored by a complementary flare of the receiving grooves.
  • Such a flare is typically produced as a result of the flange walls of the adjacent coil formers (200 and 300 in figure 7 , 300 and 400 in figure 8 ) having a distal chamfer.
  • the walls in question also may have an outwardly directed taper (see especially figure 8 ), mirrored by a complementary taper/chamfer of the flange walls of the coil formers, thus leading to a sort of scissors like, tight mutual engagement.
  • the insulating arrangement thus created between each of the at least two separate winding chambers and the free space above the circuit supporting substrate may be comprised of one element or of the combination of at least two different elements.
  • the insulation barriers may comprise three elements: one flange wall (312, 213), another flange wall of the neighbouring coil former (412, 313), and a wall portion 26, 27 of the cover cup 100 - acting as an intermediate wall.
  • the intermediate walls in question are parts of the cap 100 extending inside and above the winding windows of the core or are parts (see e.g. 30, 31) of its at least partial top walls, protruding orthogonally into the inner space of the cap 100.
  • the intermediate walls 26, 27, 28 and 29 have downward extensions (designated 9 to 18), moulded as a one-piece part together with the central ring shoulder wall 19, that complete the insulation between the winding chambers not only in the space of the winding windows of the core and above, but even in the space between the circuit support (PCB) and the core, especially in the area of the wire outlets.
  • downward extensions designated 9 to 18
  • the extensions 15 to 18 are simple prolongations of the intermediate walls 26 to 29, located at exactly their positions in parallel to the face walls, eventually with smaller thickness, due to the fact that the pin stands protruding below the central shoulder wall 19 build additional insulation which is missing above that shoulder wall 19. These prolongations may protrude down to the adjacent bench wall.
  • the single-, two- or three-part portions building one specific insulation barrier may have parts that do not have constant thickness.
  • thicker (e.g. 0.8 mm or more) insulation-forming portions are used in proximity of the basic structure of the insulating element, e.g. near the tube-shaped walls 202, 302, 402 of the coil formers and near the side and top walls of the cap 100.
  • thinner (e.g. 0.2 mm) insulation-forming portions are used in the peripheral areas of the insulating elements. This may be exploited by way of sum to produce a constant thickness through the insulation of a specific insulation barrier (see, for instance, figure 8 ).
  • these downward extensions 9 to 11 are located at the positions of the upper side walls (e.g. 20, 21) or at positions placed at least slightly outward of said upper side walls. In both cases, the extensions involved are moulded together with at least one of the lower intermediate walls 15 to 18 by forming an adjoining section bent at an angle of almost 90° (see figure 6 ).
  • At least some of the inner walls of the cap 100 act as connecting walls between the inner side walls 9, 10, 11 and the skirt walls 5, 6, 7, 8, below the central shoulder wall 19. At each location where they build the required insulation between neighbouring pin stands which belong to different coil formers, they protrude down to the common circuit substrate and have sufficient thickness. At any other location where no significant insulation (e.g. only 24V) is required between neighbouring pin stands of different coil formers, these extensions 12, 13, 14 provide useful stabilization (i.e. mechanical strengthening) between these inner side walls and skirt walls, if necessary, and may but need not protrude down to the circuit supporting substrate.
  • At least one of the individual coil formers (e.g. the coil former designated 300 - see e.g. Figure 9 ) has a pin stand 309 combined with a bench wall 305 protruding into the winding space of a neighbouring coil former 200, while the neighbouring coil former 200 has a single pin stand 204 protruding into the winding space of the coil former 300 first considered.
  • the round corners of both neighbouring winding rooms 297, 397 can be used to complete the requested creep age in the region of bench insulation skipping.
  • the transformer insulation arrangement described may in fact contain more than one of these coil former links in any orientation.
  • the bench walls such as 225 or 305, or 405 may include a plastic moulded "fill-up" (i.e. a pad-like formation) 323, 329 with outer dimensions less or equal to the corresponding bench wall which is preferably placed onto the bench wall at the opposite side of an adjoining pin stand and which fits exactly into the free space produced by the round corner of the neighbouring coil in the region of the bench insulation skipping.
  • a plastic moulded "fill-up" i.e. a pad-like formation
  • the fill-ups in questions may also arranged in pairs 323, 329 while retaining outer dimensions less or equal to the corresponding bench wall which fit exactly into the free spaces caused by the round corners of the neighbouring coil at its lower side.
  • At least one group of at least two coil formers (200, 400) out of said plurality of coil formers (200, 300; 300, 400) may include bench-side protruding portions, like pin stands (204, 403) and/or wall extensions (225, 405) and/or pad-like formations (226, 429) which are directed towards each other, respectively, and surrounds at least one other coil former (300) out of said plurality.
  • One of the bench-side protruding portions like the pin stands (204, 403) and/or the wall extensions (225, 405) and/or the pad-like formations (226, 429) may touch each other in the situation of the completely assembled transformer.
  • At least one of the bench-side protruding portions which are touching each other in the situation of the completely assembled transformer may be moulded together. It is also possible that all the bench-side protruding portions which are touching each other in the situation of the completely assembles transformer may be moulded together forming a unique part.
  • the pin stands (204, 403) may be augmented by a horizontal tunnel for providing a direct series connection between windings arranged on adjacent coil formers (200, 400).
  • the arrangement described herein includes three individual coil formers 200, 300, 400.
  • the outer coil formers 200, 400 provide the same winding room, while the middle coil former 300 provides a winding room that is almost the sum of the winding rooms of the both outer coil formers.
  • the two outer coil formers 200, 400 have almost the same shape, but mirrored along that plane which would be represented by the notional intermediate plane of a core consisting of two equal halves.
  • the middle coil former 300 has a shape that is almost symmetrical along that plane which would be represented by the notional intermediate plane of a core consisting of two equal halves.
  • each individual coil former has only two pin stands 203+204; 306+309; 403+404, on both sides of its winding chamber and both pin stands are preferably located directly opposite to each other on at least the middle coil former 300.
  • At least one of the outer coil formers uses the free space left by the not-used single-in-lined pin stands (406 ... 408) along its outer lower flange wall 415 to produce a very smooth wire outlet between the inner side of the corresponding coil and the outer pin stand 404.
  • at least one of these single-in-line pin stands is used in the place of or together with other pin stands 203+204, 403+404, to achieve an optimal fitting of the wire outlets to the traces layout on the circuit supporting substrate (PCB) and/or to provide the wire outlets necessary for a winding system comprising more than one coil.
  • two bench walls are typically present. They are preferably both carried by the middle coil former 300, protruding outwards; alternatively they are carried each by one of the outer coil formers, protruding inwardly of the transformer.
  • both outer coil formers 200, 400 carry identical coils belonging to the same winding system
  • the middle coil former 300 carries the opposite winding system.
  • the coils of the outer coil formers can be connected in parallel, e.g. via conductive strips on a common circuit supporting substrate (PCB), using these paralleled coils for example as output of an extreme step-down transformer or as input of an extreme step-up transformer: "extreme” is a current designation for transformers having a transforming ratio of about ten or higher.
  • the coils of the outer coil formers are connected in series, again e.g. via conductive strips on a common circuit supporting substrate (PCB), using that series of coils for example as output of a moderate step-down transformer or as input of a moderate step-up transformer:
  • “moderate” is a current designation for transformers having a transforming ratio of less than ten, typically about four.
  • the arrangement described herein enables the economical, reliable, modular, and reproducible mass production of transformers with more than two hermetically insulated winding chambers.
  • the advantages of a disc structure - a lower cross-winding capacitance and a higher leakage inductance - have been combined in such a transformer.
  • the presently preferred embodiment in the form of a symmetric three-chamber winding structure leads to a number of significant advantages. These include i.a. a significant reduction of the proximity losses within the coils, the flux equilibrium within the core which nulls the magnetic field in the outer leg(s) of the core and thus reduces the core losses, and the higher quality factor of the leakage inductance (up to 70) due to the symmetrical field distribution which enables said transformer to be used as real resonance inductor for soft-switching circuits.
  • a symmetrical three-chamber disc transformer as described herein is symmetrical also in respect of parasitics: the ohmic resistances of two the "halves" of the one winding (coil) are equal, and the cross-winding capacitance from each of these "halves” to the second coil is equal. This is due both to the same winding diameters - thus the same wire lengths - and to the sorting of the wires within each "half" coil.
  • Figure 12 is a schematic representation of a preferred arrangement that may be adopted in connection with any of the coil formers 200, 300, and 400.
  • the coil former 400 is shown in figure 12 as being provided with pin stands 406, 404 in the form of clamp-like formations. While only two of these stands are actually used in the embodiment shown, these clamps may be in any number (e.g. four, as shown, with the empty clamps 407 and 408) depending on the number of ends of the winding wound on the relative coil former.
  • the winding 490 wound on the coil former 400 has two winding ends 484, 486. These are simply clamped in the pin stands 404, 406 and can be easily reinforced (e.g. by applying a solder mass onto them) to form winding pins of sufficient rigidity to permit direct insertion in the receiving holes provided in the mounting substrate (PCB) for the transformer.
  • PCB mounting substrate
  • the arrangement shown in figure 12 is particularly effective when the winding wound on the relative coil former is comprised of Litz wire or a braid of wires.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)

Claims (27)

  1. Transformateur comprenant :
    - un noyau ayant un jambage ( 3, 4 ) définissant une direction longitudinale du transformateur et ayant un côté de banc de montage,
    - une pluralité d'enroulement ( 290, 390, 490 ) enroulés sur un mandrin isolant,
    - le mandrin comprenant une pluralité d'armatures ( 200, 300 ; 200, 300, 400 ) de bobine,
    - chaque armature de bobine ayant au moins un enroulement ( 290, 390 ; 290, 390, 490 ) respectif qui y est enroulé,
    - chaque armature ( 200, 300 ; 200, 300, 400 ) de bobine comprenant deux parois ( 212... 215 ; 312...315 ; 412... 415 ) d'extrémité de séparation procurant une isolation du au moins un enroulement respectif,
    - au moins l'une des parois ( 214, 215 ; 314, 414, 415 ) d'extrémité ayant une partie en saillie, en correspondance avec une armature voisine de bobine, et
    - la partie en saillie comprenant un support ( 204, 306, 309, 403 ) de broche pour l'un des enroulements et au moins un prolongement ( 225, 305, 405 ) de paroi placé du côté du banc, caractérisé en ce que
    - chaque armature ( 200, 300, 200, 300, 400 ) de bobine de ladite pluralité est disposée côte à côte sur le jambage ( 3, 4 ),
    - le mandrin comprend un chapeau ( 100 ) isolant de couverture formant une structure isolante commune pour les enroulements respectifs enroulés sur la pluralité d'armatures ( 200, 300 ; 200, 300, 400 ) de bobine,
    - le chapeau ( 100 ) de couverture comprend des parties de paroi s'étendant vers les armatures ( 200, 300 ; 200, 300, 400 ) de bobine et formant des conformations en labyrinthe avec les parois ( 212, 213 ; 312, 313 ; 412, 413 ) d'extrémité des armatures de bobine, et en ce que
    - le prolongement ( 225, 305, 405 ) de paroi recouvre au moins en partie l'enroulement respectif prévu dans son armature de bobine, et isole le côté banc de l'enroulement respectif dans son armature de bobine voisine par rapport à un substrat ( PCB ) de support/de montage d'un circuit commun.
  2. Transformateur suivant la revendication 1, caractérisé en ce que le prolongement ( 305 ) de paroi comprend au moins une conformation ( 323, 329 ) conformée d'une manière analogue à un bourrelet s'adaptant à la forme de l'enroulement respectif prévu dans l'armature voisine de bobine.
  3. Transformateur suivant la revendication 1, caractérisé en ce que le au moins un prolongement ( 225, 305, 405 ) de paroi est sensiblement orthogonal à la paroi ( 215, 314, 414 ) d'extrémité à partir de laquelle le au moins un prolongement ( 225, 305, 405 ) de paroi s'étend.
  4. Transformateur suivant la revendication 1, caractérisé en ce que la partie en saillie comprend au moins un prolongement ( 225, 305, 405 ) de paroi ainsi que le au moins l'un des supports ( 204, 306, 309, 403 ) de broche formant un agencement d'un seul tenant avec le au moins un prolongement ( 225, 305, 405 ) de paroi.
  5. Transformateur suivant la revendication 4, caractérisé en ce que le au moins un support ( 204, 306, 309, 403 ) de broche fait saillie du au moins un prolongement ( 225, 305, 405 ) de paroi.
  6. Transformateur suivant la revendication 1, caractérisé en ce qu'au moins l'une des armatures ( 200, 300, 400 ) de bobine comprend au moins deux supports ( 203, 204 ; 306, 309, 403, 404 ) de broche disposés sur des côtés opposés de l'enroulement respectif.
  7. Transformateur suivant l'une des revendications 1 à 6, caractérisé en ce qu'au moins l'une des armatures ( 200, 300, 400 ) de bobine comprend au moins deux supports ( 203, 204 ; 306, 309 ; 403, 404 ) de broche disposés du même côté du transformateur.
  8. Transformateur suivant l'une des revendications 6 ou 7, caractérisé en ce que la au moins une armature ( 300 ) de bobine est disposée entre deux armatures ( 200, 400 ) de bobine voisine.
  9. Transformateur suivant l'une quelconque des revendications précédentes 1 à 8, caractérisé en ce que la pluralité des armatures ( 200, 300 ; 200, 300, 400 ) de bobine sont alignées dans une direction longitudinale du transformateur, le transformateur ayant des côtés de bord opposés par rapport à la direction longitudinale, et en ce que les supports ( 203, 204 ; 306, 309, 403, 404 ) de bobine et la pluralité d'armatures de bobine sont disposées au moins en partie en correspondance avec les côtés de bord opposés du transformateur.
  10. Transformateur suivant la revendication 9, caractérisé en ce que la pluralité d'armatures ( 200, 300 ; 200, 300, 400 ) de bobine a une forme analogue à une broche creuse ayant des parties ( 202, 302, 402 ) intérieures de paroi tubulaires disposées autour du jambage ( 3, 4 ) du noyau.
  11. Transformateur suivant la revendication 10, caractérisé en ce que les parties 202, 302, 402 ) de paroi tubulaires sont en un matériau isolant, isolant les enroulements respectifs enroulés sur la pluralité d'armatures ( 200, 300 ; 200, 300, 400 ) de bobine par rapport au jambage commun du noyau ( 3, 4 ).
  12. Transformateur suivant la revendication 11, caractérisé en ce que le transformateur a un côté de banc de montage et en ce que le chapeau ( 100 ) de recouvrement recouvre sensiblement les armatures ( 200, 300 ; 200, 300, 400 ) de bobine, à l'exception du côté du banc de montage.
  13. Transformateur suivant la revendication 12, caractérisé en ce que les armatures de bobine ont des parties de base portant des supports ( 203, 204 ; 306, 309, 403, 404 ) de broche pour les enroulements respectifs enroulés sur la pluralité d'armatures ( 200, 300 ; 200, 300, 400 ) de bobine et en ce que le chapeau ( 100 ) de recouvrement comprend des parois ( 9 à 18 ) de cloisonnement entourant le support de broche pour ménager une isolation entre le supports de broche des enroulements respectifs enroulés sur des armatures de bobine différentes de ladite pluralité.
  14. Transformateur suivant la revendication 12 ou 13, caractérisé en ce que
    - les armatures de bobine ont des parties de base portant des supports ( 203, 204 ; 306, 309 ; 403, 404 ) de broche pour les enroulements respectifs enroulés sur la pluralité d'armatures ( 200, 300 ; 200, 300, 400 ) de bobine,
    - les armatures ( 200, 300 ; 200, 300, 400 ) ont en association un noyau ( 3, 4 ) commun de transformateur, et
    - le chapeau ( 100 ) de recouvrement a une partie ( 20, 21, 24, 25 ) centrale entourant la pluralité d'armatures ( 200, 300 ; 200, 300, 400 ) de bobine donnant de l'isolation entre les bobines ( 290, 390, 490 ) et le noyau ( 1, 2 ) ensemble avec l'espace libre latéral, et a une paroi ( 19 ) d'épaulement supportant un noyau ( 1, 2 ) de transformateur et donnant de l'isolation entre le noyau ( 1, 2 ) et les supports ( 203, 204 ; 306, 309, ; 403, 404 ) de broche.
  15. Transformateur suivant la revendication 14, caractérisé en ce que le chapeau ( 100 ) de recouvrement comprend des parois ( 5, 6, 7, 8 ) périphériques de jupe partant de la paroi ( 19 ) en épaulement vers le bas jusqu'au banc de l'agencement et entourant les supports ( 203, 204 ; 306, 309, 403, 404 ) de broche associés aux armatures ( 200, 300 ; 200, 300, 400 ) de bobine en ménageant une isolation entre ces supports de broche et l'espace libre latéral.
  16. Transformateur suivant la revendication 1, caractérisé en ce que les parties de paroi du chapeau ( 100 ) de recouvrement s'étendant vers les armatures ( 200, 300 ; 200, 300, 400 ) de bobine sont, d'une manière générale, coniques distalement et les parois ( 212, 213 ; 312, 313, ; 412, 413 ) d'extrémité des armatures de bobine comprennent des parties d'extrémité chanfreinées s'adaptant aux parties de paroi du chapeau ( 100 ) de recouvrement s'étendant vers les armatures ( 200, 300 ; 300, 400 ) de bobine.
  17. Transformateur suivant la revendication 16, caractérisé en ce que les parties d'extrémité chanfreinées des parois ( 312, 213 ; 412, 313 ) d'extrémité de deux armatures ( 200, 300 ; 300, 400 ) voisines de bobine de ladite pluralité définissent conjointement une rainure pour recevoir une partie respective de paroi du chapeau ( 100 ) de recouvrement s'étendant en direction des armatures de bobine.
  18. Transformateur suivant l'une quelconque des revendications précédentes, caractérisé en ce que au moins un groupe d'au moins deux armatures ( 200, 400 ) de bobine, parmi la pluralité d'armatures ( 200, 300 ; 300, 400 ) de bobine, comprend des parties en saillie du côté du banc, comme des supports ( 204, 403 ) de broche et/ou des prolongements ( 225, 405 ) de paroi et/ou des conformations ( 226, 429 ) analogues à des bourrelets, qui sont dirigées l'une vers l'autre respectivement et entourent au moins une autre armature ( 300 ) de bobine de la pluralité.
  19. Transformateur suivant la revendication 18, caractérisé en ce qu'au moins l'une des parties en saillie du côté du banc, comme les supports ( 204, 403 ) et/ou le prolongement ( 225, 405 ) de paroi et/ou les conformations ( 226, 429 ) analogues à un bourrelet, se touchent l'une l'autre dans la situation où le transformateur est assemblé complètement.
  20. Transformateur suivant la revendication 19, caractérisé en ce que l'on tend vers une liaison horizontale sinueuse entre le prolongement ( 225, 405 ) de paroi et les conformations ( 226, 429 ) analogues à un bourrelet qui se touchent l'une l'autre dans le cas où le transformateur est assemblé et qui sont en parallèle à des sections de la forme extérieure des enroulements enroulés.
  21. Transformateur suivant la revendication 19, caractérisé en ce que au moins l'une des parties en saillie du côté du banc, qui se touchent l'une l'autre dans la situation où le transformateur est assemblé complètement, sont moulées ensemble.
  22. Transformateur suivant la revendication 21, caractérisé en ce que toutes les parties en saillie du côté du banc, qui se touchent l'une l'autre dans la situation où le transformateur est assemblé complètement, sont moulées ensemble sous la forme d'une pièce unique.
  23. Transformateur suivant la revendication 18 ou 21, caractérisé en ce que les supports ( 204, 403 ) de broche sont augmentés d'un tunnel horizontal pour ménager un montage en série direct entre des enroulements disposés sur des armatures ( 204, 400 ) voisines de bobine.
  24. Transformateur suivant l'une quelconque des revendications précédentes, caractérisé en ce que la pluralité d'armatures de bobine comprend trois armatures ( 200, 300, 400 ) de bobine.
  25. Transformateur suivant l'une quelconque des revendications précédentes, caractérisé en ce que les armatures de bobine comprennent des supports ( 203, 204 ; 306, 309 ; 403, 404 ) de broche pour les enroulements respectifs enroulés sur la pluralité d'armatures ( 200, 300 ; 200, 300, 400 ) de bobine et en ce que au moins l'une des armatures de bobine comprend des rainures de guidage des parties d'extrémité de l'enroulement respectif qui y est enroulé.
  26. Transformateur suivant l'une quelconque des revendications précédentes, caractérisé en ce que :
    - au moins l'une ( 400 ) des armatures de bobine de ladite pluralité ( 200, 300 ; 200, 300, 400 ) comprend des supports ( 404, 406 ) de broche pour l'enroulement respectif qui y est enroulé, les supports ( 404, 406 ) de broche étant sous la forme de conformation analogues à des pinces, et
    - l'enroulement ( 490 ) respectif a des extrémités ( 484, 486 ) d'enroulement pincées dans les supports ( 404, 406 ) de broche, sous la forme de conformations analogues à des pinces.
  27. Transformateur suivant la revendication 26, caractérisé en ce que l'enroulement ( 490 ) respectif est constitué d'un fil choisi parmi un fil de Litz et une tresse de fils.
EP20060003265 2005-02-22 2006-02-17 Transformateur à chambres multiples Not-in-force EP1693860B8 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20060003265 EP1693860B8 (fr) 2005-02-22 2006-02-17 Transformateur à chambres multiples

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05425091A EP1693859A1 (fr) 2005-02-22 2005-02-22 Transformateur à chambres multiples
EP20060003265 EP1693860B8 (fr) 2005-02-22 2006-02-17 Transformateur à chambres multiples

Publications (3)

Publication Number Publication Date
EP1693860A1 EP1693860A1 (fr) 2006-08-23
EP1693860B1 true EP1693860B1 (fr) 2010-10-06
EP1693860B8 EP1693860B8 (fr) 2011-01-26

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Application Number Title Priority Date Filing Date
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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4250479A (en) * 1979-04-09 1981-02-10 Hewlett-Packard Company Transformer bobbin assembly
US5534839A (en) * 1995-04-05 1996-07-09 Cramer Coil & Transformer Co., Inc. Miniature transformer
DE19607714A1 (de) 1996-02-29 1997-09-04 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Transformator
EP1653487B1 (fr) 2004-10-19 2008-03-12 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Dispositif d'isolation pour des composants électriques
DE602004027503D1 (de) 2004-11-15 2010-07-15 Osram Gmbh Transformator

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EP1693860A1 (fr) 2006-08-23
EP1693860B8 (fr) 2011-01-26

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