EP0436434A1 - Ringkerntransformator - Google Patents

Ringkerntransformator Download PDF

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Publication number
EP0436434A1
EP0436434A1 EP90403761A EP90403761A EP0436434A1 EP 0436434 A1 EP0436434 A1 EP 0436434A1 EP 90403761 A EP90403761 A EP 90403761A EP 90403761 A EP90403761 A EP 90403761A EP 0436434 A1 EP0436434 A1 EP 0436434A1
Authority
EP
European Patent Office
Prior art keywords
strip
ring
transformer
carcass
transformer according
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.)
Withdrawn
Application number
EP90403761A
Other languages
English (en)
French (fr)
Inventor
Jean-Claude Beisser
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0436434A1 publication Critical patent/EP0436434A1/de
Withdrawn legal-status Critical Current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
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
    • H01F41/022—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) by winding the strips or ribbons around a coil
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • 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
    • 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
    • H01F27/2852—Construction of conductive connections, of leads
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/16—Toroidal transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • 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
    • H01F2027/2857—Coil formed from wound foil conductor
    • 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, and especially a thin toroidal type transformer.
  • Transformers of this type consist of an O-ring of magnetic material around which are arranged one or more primary windings and one or more secondary windings.
  • the windings are made around a carcass, made of an insulating material, generally in two parts, arranged around the torus, on which there is wound an insulated conductive wire, of section appropriate to the intensity of the current it is intended to deliver.
  • This type of transformer is difficult to manufacture due to the problems posed by the realization of the series of windings around the toroid.
  • the windings are usually made by automatic machines, but these machines, in addition to their complexity and their high cost price, are difficult to use for windings of large diameter wires. In addition, these machines require a relatively large central opening of the torus.
  • the present invention aims to simplify the manufacture of high efficiency toroidal transformers, provided with a secondary intended to be traversed by currents of high intensity, and having various outputs allowing to have multiple operating voltages.
  • the present invention relates to a toroidal type transformer comprising a ring-shaped magnetic circuit consisting of a series of windings of a strip of magnetic sheet metal, around which are arranged at least one primary winding and at least one winding. secondary, characterized in that each of the primary and secondary windings is disposed around a carcass of insulating material, surrounding the ring, this carcass being provided on its internal face with guide means intended to come into contact with the internal face of the strip constituting the ring.
  • Figure 1 is a top view in partial section of a transformer according to the invention.
  • Figure 2 is a perspective view of a foldable element intended to constitute a winding carcass.
  • FIG. 3 is a perspective view of a winding carcass made up of the foldable element of FIG. 2.
  • Figures 4a, 4b and 4c show details of implementation of a winding carcass according to the invention.
  • FIG. 5 is a perspective view of an embodiment of a transformer secondary according to the invention.
  • Figures 6 and 6a are two views in partial section, along the line VI-VI of Figure 1, of two variants of a winding carcass.
  • Figure 7 is a plan view of an element constituting the secondary winding.
  • Figure 8 is a partial top view of several elements shown in Figure 7 once assembled.
  • Figure 9 is a cross-sectional and vertical view of an electrical connection mode of a conductive wire on the secondary of the transformer.
  • FIG. 10 is a perspective view of a detail of embodiment of FIG. 9.
  • Figure 11 is a top view of the device used to implement the magnetic circuit of the transformer inside the winding carcasses.
  • a toroidal transformer 1 essentially consists of a magnetic circuit of substantially toroidal shape 3, a primary comprising two windings 5.5 ′ and a secondary comprising two windings 7.7 ′.
  • the magnetic circuit 3 consists of a strip 4 of magnetic material, such as for example a sheet of silicon, wound on itself so as to constitute a ring.
  • the two primary windings 5.5 ′ are made up each of a carcass 9, made of an insulating material, such as a plastic material, on which are wound turns 11 of conductive wires provided, on their periphery, with an electrical insulator.
  • the carcass 9 is in the form of a parallelepipedal box open on two of its opposite faces 10,10 'and the distance between its two main walls 15,17 parallel to the plane of the magnetic circuit 3 is slightly greater than the height thereof, by so that the housing 9 can surround the magnetic circuit.
  • the two windings 5.5 ′, as shown in FIG. 1, are arranged symmetrically with respect to a plane passing through the center of the ring 3.
  • the housing 9 is obtained by folding an element 9 ′, manufactured by molding, and having, as shown in FIG. 2, at the location of the folds, recesses 13 in the form of a V.
  • Two of the faces 15 and 17 of this element 9 ′ which, after folding, will respectively constitute the lower and upper main walls of the housing 9, are provided with a boss of rectangular cross section 19, 19 ′ and in the form of an arc of a circle of radius r, of the same order of magnitude as the internal radius of the magnetic circuit 3.
  • the two bosses 19, 19 ′, before the folding of the element 9 ′ have their respective concavities oriented opposite one another, so that, after folding, the two circular bosses 19, 19 ′ are superimposed.
  • bosses 19,19 ' are pierced with a series of holes, respectively 21,23, aligned, after folding of the element 9', on the same vertical yy '( Figure 6), and are distributed regularly along the circular bosses 19.19 '.
  • the entry of the holes 23 of the boss 19 ' involves milling 25 to 120 °.
  • Rollers 27 are used to guide the strip 4 constituting the core inside the housing 9, during the positioning of the latter, as will be explained below.
  • These rollers 27 have two end studs 29 and a cylindrical central part 31 whose diameter is such that when the two studs 29 are in place in the holes 21, 23, the central part 31 of the roller 27 protrudes towards the inside of the carcass 9 the bosses 19.19 '.
  • the windings 7, 7 'constituting the secondary are arranged diametrically opposite along an axis xx' perpendicular to the axis zz 'of the two primary windings.
  • the transformer secondary consists of massive elements, connected to each other so as to obtain electrical continuity.
  • each element thus consists of a rectangular plate 35 provided with a rectangular central recess 37, the length and width of which correspond respectively to the width and to the height of the housing 9.
  • Each of the plates 35 has a transverse notch 41 connecting the central recess 37 to the outside and making it possible to fold the upper part 43 of a plate on one side and the lower part 45 of this same plate on the other side, so as to join the upper part 43 of a given plate to the lower part 45 of an adjacent plate.
  • the connection between the plates 35 can be achieved for example by welding and all of the plates 35 thus constitutes a winding.
  • the secondary of the transformer is thus constituted, in the present embodiment, of two identical windings 7 and 7 'joined by a conductive plate 8.
  • the length of the conductive plate 8 is substantially of the same value as that of the carcasses 9, so that each winding constituting the secondary of the transformer can be around the magnetic circuit 3, diametrically opposite along an axis xx 'perpendicular to the axis zz' of the two primary windings.
  • the various constituent elements of the latter take place in a housing 50, and the external ends 51 of the plates 35 constituting the secondary of the transformer are maintained at a given deviation e from one another by an insulating member 52 provided with vertical slots within which take up each of the outer ends 51 of the wafers 35.
  • the two windings 7, 7 'constituting the secondary of the transformer can be produced in a single piece, for example by molding. This latter mode of implementation being particularly advantageous as regards the cost price of the transformer.
  • the plates 35 constituting the secondary are not coated with insulation, the dielectric being constituted, in the present case by air, and the distance e separating two adjacent plates 35 will be determined in a known manner. of the tension between them.
  • the next secondary embodiment the invention makes it possible to produce, in a simple manner, multiple mid-points, or points for sampling multiple voltages, by simply extending the plates 35 of a length towards the outside of the transformer allowing an electrical connection to be made.
  • FIGS. 9 and 10 It is possible, for example, as shown in FIGS. 9 and 10, to use means for tightening the conductive wires 80 which are self-locking.
  • These means consist of a clamping nut 70 traversed by a central threaded hole 72 and comprising a transverse slot 76 extending, in the direction of the axis of the hole 72, over part of the thickness of the nut 70 , so as to give it a certain flexibility.
  • the base of the nut 70 is hollowed out by two transverse grooves 78 of thickness less than the diameter of the electric cables 80 to be connected to the transformer.
  • a screw 84 on which a tightening washer 86 is threaded passes through a slot 88 provided on the edge 51 of the plate 35 and is screwed into the threaded hole 72 of the clamping nut 70.
  • the conducting wires 80 intended to ensure the electrical connection of an installation with the transformer, take place in the grooves 78, existing between the clamping nut 70 and the plate 35.
  • the screw 84 is tightened the conducting wires 80 being thicker than the depth of the groove 78 the bottom of the nut 70 is not in contact with the plate 35 and, during tightening, the two parts of the nut 70 situated on either side of the transverse groove 76 deform and tighten against the screw 84, thus achieving braking of the latter and preventing any accidental unscrewing.
  • the guide means may consist of simple circular bosses 20, 20 ′ provided inside the upper 17 and lower 15 faces of the housing 9.
  • Element 9 ′ shown in FIG. 2, is used for this, on which the pins 29 of the guide rollers 27 are placed in the holes 21 provided in the circular boss 19, and the part 17 of said element is folded back. 9 'so that the holes 23 of the bosses 19' take their place around the opposite stud 29 'of the rollers 27, the chamfers 25 at 120 ° provided in the holes 23 allowing the part 17 to be folded down. appropriate means, the two free ends of this element, it being understood that such a fixing is temporary, since the conducting wires 11 once wound on the housings 9 will ensure the maintenance thereof.
  • the strip 4 Before its installation, the strip 4 is wound on a hub of radius r equal to the internal radius of the magnetic circuit of the transformer, then it is annealed at around 800 ° C. After this annealing operation, the strip is ready to be placed inside the housings 9.
  • the device shown in FIG. 11 which consists of the stand 81 receiving a hub 82, movable in rotation about a central axis, on which the previously annealed magnetic strip 4 is wound, and which one wishes to introduce.
  • the four housings 9 and a drive system composed of four rollers A, B, C, D one of which, the roller A, can be rotated in the direction of the arrow F by a motor, not shown in the drawing, and another, the roller D, is movable in translation under the action of elastic means 90.
  • a thin and flexible driving strap 92, or a belt, is introduced inside the three upper casings 9, namely the housings 9a, 9b, 9c, and is wound against the four rollers C, D, A, B , this strip being fixed on itself, by means not shown in the drawing, so as to constitute an endless loop maintained under tension by the tension roller D under the action of the tension spring 90.
  • the end of the strip exiting the casing 9d is fixed by any suitable means the part of the strip entering the housing 9a and the drive strip 92 is again rotated so as to introduce inside the four housings 9a, 9b, 9c and 9d the desired number of turns of the strip 4 of way to constitute the magnetic circuit 3.
  • the radius of the hub 82 is close to the outside radius r ′ of the magnetic circuit 3 once it is finished.
  • toroidal type transformers using a primary winding and a superposed secondary winding and, in this case, in order to facilitate the positioning of the magnetic strip inside the windings, three additional housings are used 9 , arranged as above, and intended to guide the strip during its installation.
  • the three additional boxes 9 are removed after the positioning in the primary and secondary of the forming hole of the magnetic strip 4.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
EP90403761A 1990-01-05 1990-12-24 Ringkerntransformator Withdrawn EP0436434A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9000097 1990-01-05
FR9000097A FR2656951A1 (fr) 1990-01-05 1990-01-05 Transformateur de type torique.

Publications (1)

Publication Number Publication Date
EP0436434A1 true EP0436434A1 (de) 1991-07-10

Family

ID=9392552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90403761A Withdrawn EP0436434A1 (de) 1990-01-05 1990-12-24 Ringkerntransformator

Country Status (3)

Country Link
EP (1) EP0436434A1 (de)
FR (1) FR2656951A1 (de)
WO (1) WO1991010244A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9300433A (nl) * 1993-03-10 1994-10-03 Amplimo B V "Step up"-transformator.
WO2000028557A1 (de) * 1998-11-10 2000-05-18 Vacuumschmelze Gmbh Verfahren zur herstellung eines in sich geschlossenen magnetkerns
WO2004105063A2 (fr) * 2003-05-16 2004-12-02 Jean-Marc Scherrer Enroulement pour transformateur et son procede de fabrication
CN102360860A (zh) * 2011-06-03 2012-02-22 宝电电子(张家港)有限公司 带外壳磁环变压器

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1852805A (en) * 1931-10-02 1932-04-05 Gen Electric Transformer winding
US2055899A (en) * 1934-08-25 1936-09-29 Phelps Dodge Copper Prod Core
US2160588A (en) * 1937-01-30 1939-05-30 Gen Electric Electromagnetic induction apparatus and method of making the same
US2191393A (en) * 1937-11-23 1940-02-20 Marien W Humphreys Transformer
DE1025064B (de) * 1955-07-05 1958-02-27 Siemens Ag Zangenstromwandler
FR1593893A (de) * 1967-12-26 1970-06-01
DE1933952A1 (de) * 1969-07-04 1971-01-28 Raupach Friedrich Hochspannungstransformator
US3826967A (en) * 1973-05-29 1974-07-30 Pioneer Magnetics Inc Low leakage secondary circuit for a power transformer including conductive strips forming the secondary and connections for rectifying diodes
GB2089764A (en) * 1980-11-25 1982-06-30 Legrand Sa Coil former for transformer
EP0226793A1 (de) * 1985-11-25 1987-07-01 Siemens Aktiengesellschaft Feuchtigkeitsdicht mit Giessharz oder thermoplastischem Kunstsharz umhüllter bewickelter Ferritringkern

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59189611A (ja) * 1983-04-13 1984-10-27 Hitachi Ltd 静止誘導電器
JPS60207324A (ja) * 1984-03-31 1985-10-18 Toshiba Corp 巻鉄心製造装置
JPS6144413A (ja) * 1984-08-08 1986-03-04 Fuji Electric Corp Res & Dev Ltd 電気機器鉄心の製造方法
JPH01161815A (ja) * 1987-12-18 1989-06-26 Toshiba Corp 巻鉄心の製造方法

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1852805A (en) * 1931-10-02 1932-04-05 Gen Electric Transformer winding
US2055899A (en) * 1934-08-25 1936-09-29 Phelps Dodge Copper Prod Core
US2160588A (en) * 1937-01-30 1939-05-30 Gen Electric Electromagnetic induction apparatus and method of making the same
US2191393A (en) * 1937-11-23 1940-02-20 Marien W Humphreys Transformer
DE1025064B (de) * 1955-07-05 1958-02-27 Siemens Ag Zangenstromwandler
FR1593893A (de) * 1967-12-26 1970-06-01
DE1933952A1 (de) * 1969-07-04 1971-01-28 Raupach Friedrich Hochspannungstransformator
US3826967A (en) * 1973-05-29 1974-07-30 Pioneer Magnetics Inc Low leakage secondary circuit for a power transformer including conductive strips forming the secondary and connections for rectifying diodes
GB2089764A (en) * 1980-11-25 1982-06-30 Legrand Sa Coil former for transformer
EP0226793A1 (de) * 1985-11-25 1987-07-01 Siemens Aktiengesellschaft Feuchtigkeitsdicht mit Giessharz oder thermoplastischem Kunstsharz umhüllter bewickelter Ferritringkern

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 201 (E-419)(2257) 15 juillet 1986, & JP-A-61 44413 (FUJI ELECTRIC CORP RES & DEV LTD) *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 54 (E-385)(2111) 04 mars 1986, & JP-A-60 207324 (TOSHIBA K.K.) *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 433 (E-824)(3781) 27 septembre 1989, & JP-A-1 161815 (TOSHIBA CORP) *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 49 (E-300)(1772) 02 mars 1985, & JP-A-59 189611 (HITACHI SEISAKUSHO K.K.) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9300433A (nl) * 1993-03-10 1994-10-03 Amplimo B V "Step up"-transformator.
WO2000028557A1 (de) * 1998-11-10 2000-05-18 Vacuumschmelze Gmbh Verfahren zur herstellung eines in sich geschlossenen magnetkerns
WO2004105063A2 (fr) * 2003-05-16 2004-12-02 Jean-Marc Scherrer Enroulement pour transformateur et son procede de fabrication
WO2004105063A3 (fr) * 2003-05-16 2005-04-07 Jean-Marc Scherrer Enroulement pour transformateur et son procede de fabrication
US7836580B2 (en) 2003-05-16 2010-11-23 Jean-Marc Scherrer Transformer winding and production method thereof
CN102360860A (zh) * 2011-06-03 2012-02-22 宝电电子(张家港)有限公司 带外壳磁环变压器

Also Published As

Publication number Publication date
FR2656951B1 (de) 1995-02-03
WO1991010244A1 (fr) 1991-07-11
FR2656951A1 (fr) 1991-07-12

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