EP1286369A1 - High frequency ferrite transformer - Google Patents

High frequency ferrite transformer Download PDF

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Publication number
EP1286369A1
EP1286369A1 EP01120072A EP01120072A EP1286369A1 EP 1286369 A1 EP1286369 A1 EP 1286369A1 EP 01120072 A EP01120072 A EP 01120072A EP 01120072 A EP01120072 A EP 01120072A EP 1286369 A1 EP1286369 A1 EP 1286369A1
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EP
European Patent Office
Prior art keywords
coils
mdn
type ferrite
primary
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Withdrawn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
EP01120072A
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German (de)
French (fr)
Inventor
Mauro Del Nobile
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
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP01120072A priority Critical patent/EP1286369A1/en
Publication of EP1286369A1 publication Critical patent/EP1286369A1/en
Withdrawn legal-status Critical Current

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    • 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
    • H01F27/263—Fastening parts of the core together
    • 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
    • H01F27/255—Magnetic cores made from particles
    • 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
    • H01F41/04—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 for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/098—Mandrels; 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
    • H01F27/02—Casings
    • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
    • 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

Definitions

  • MDN type ferrite transformer for high frequencies which is characterized by the fact that the winding (s) of the primary (s) is not coaxial (are not coaxial) with the winding (s) of the secondary (s) as opposed to the current state of technique and with this type DND the primary (s) and secondary (s) are each wound (s) on a reel physically separate from each other and of the same diameter this same diameter being impossible to carry out on current transformers because they include primary (s) and coaxial secondary (s) and each of these two coils of the MDN type is inserted separately and directly on the magnetic core (see figure n ° 8) and so the secondary (s) are therefore directly and separately crossed (s) by the magnetic flux circulating in the core of the transformer and are therefore not coaxially inserted one on the other as in the state current technology which eliminates parasitic capacities and other limiting drawbacks current ferrite transformers where primary (s) and secondary (s) which are coaxial and because of its construction the magnetic efficiency of the Ferrite Transformer MDN type is

Abstract

The high frequency transformer has primary and secondary windings which are not coaxial to each other. The windings are wound on separate coils of the same diameter allowing large diameter coils. Each coil is inserted separately and directly onto the magnetic core.

Description

2) Texte de description : 2) Description text:

Il s'agit d'un transformateur ferrite type MDN pour les hautes fréquences qui se caractérise par le fait que le ou les enroulement(s) du ou des primaire(s) n'est pas coaxial (ne sont pas coaxiaux) avec le ou les enroulements du ou des secondaires ceci par opposition à l'état actuel de la technique et avec ce type MDN les primaire(s) et secondaire(s) sont chacun enroulé(s) sur une bobine physiquement distincte l'une de l'autre et de même diamètre ce même diamètre étant impossible à réaliser sur les transformateurs actuels car ils comportent des primaire(s) et secondaire(s) coaxiaux et chacune de ces deux bobines du type MDN est insérée séparément et directement sur le core magnétique (voir figure n° 8) et ainsi le ou les secondaires sont donc directement et séparément traversé(s) par le flux magnétique circulant dans le core du transformateur et ne sont donc pas coaxialement inséré(s) l'un sur l'autre comme dans l'état actuel de la technique ce qui élimine les capacités parasites et autres inconvénients limitatifs des actuels transformateurs ferrite où primaire(s) et secondaire(s) qui sont coaxiaux et du fait de sa construction le rendement magnétique du Transformateur Ferrite type MDN est plus efficace les pertes sont moindres les différents éléments constitutifs rendent sa fabrication particulièrement aisée et moins onéreuse ainsi que plus adaptée à l'automation industrielle et cela permet également de réaliser des modèles de transformateurs ferrite ayant un grand nombres de primaires et de secondaires car les surfaces extérieures des bobines peuvent comporter des quantités de points de connexions ou (pins) non réalisables sur les transformateurs conventionnels.It is a MDN type ferrite transformer for high frequencies which is characterized by the fact that the winding (s) of the primary (s) is not coaxial (are not coaxial) with the winding (s) of the secondary (s) as opposed to the current state of technique and with this type DND the primary (s) and secondary (s) are each wound (s) on a reel physically separate from each other and of the same diameter this same diameter being impossible to carry out on current transformers because they include primary (s) and coaxial secondary (s) and each of these two coils of the MDN type is inserted separately and directly on the magnetic core (see figure n ° 8) and so the secondary (s) are therefore directly and separately crossed (s) by the magnetic flux circulating in the core of the transformer and are therefore not coaxially inserted one on the other as in the state current technology which eliminates parasitic capacities and other limiting drawbacks current ferrite transformers where primary (s) and secondary (s) which are coaxial and because of its construction the magnetic efficiency of the Ferrite Transformer MDN type is more efficient the losses are less the various constituent elements make its manufacture particularly easy and less expensive as well as more suitable for industrial automation and this also makes it possible to produce ferrite transformer models having a large numbers of primaries and secondaries because the outer surfaces of the coils can include quantities of connection points or (pins) not achievable on the conventional transformers.

Claims (12)

Le transformateur ferrite type MDN pour les hautes fréquences se caractérise par le fait que le ou les enroulement(s) du ou des primaire(s) n'est pas coaxial (ne sont pas coaxiaux) avec le ou les enroulements du ou des secondaires ceci par opposition à l'état actuel de la technique et avec ce type MDN les primaire(s) et secondaire(s) sont chacun enroulé(s) sur une bobine physiquement distincte l'une de l'autre et de même diamètre ce même diamètre étant impossible à réaliser sur les transformateurs actuels car ils comportent des primaire(s) et secondaire(s) coaxiaux et chacune de ces deux bobines du type MDN est insérée séparément et directement sur le core magnétique (voir figure n° 8) et ainsi le ou les secondaires sont donc directement et séparément traversé(s) par le flux magnétique circulant dans le core du transformateur et ne sont donc pas coaxialement inséré(s) l'un sur l'autre comme dans l'état actuel de la technique ce qui élimine les capacités parasites et autres inconvénients limitatifs des actuels transformateurs ferrite où primaire(s) et secondaire(s) qui sont coaxiaux et du fait de sa construction le rendement magnétique du Transformateur Ferrite type MDN est plus efficace les pertes sont moindres les différents éléments constitutifs rendent sa fabrication particulièrement aisée et moins onéreuse ainsi que plus adaptée à l'automation industrielle et cela permet également de réaliser des modèles de transformateurs ferrite ayant un grand nombres de primaires et de secondaires car les surfaces extérieures des bobines peuvent comporter des quantités de points de connexions ou (pins) non réalisables sur les transformateurs conventionnels.The MDN type ferrite transformer for high frequencies is characterized by the fact that the winding (s) of the primary (s) is not coaxial (are not coaxial) with the winding (s) of the secondary (s) this as opposed to the current state of the art and with this type of DND the primary (s) and secondary (s) are each wound (s) on a coil physically distinct from one another and of the same diameter this same diameter being impossible to carry out on current transformers because they comprise primary (s) and secondary (s) coaxial and each of these two coils of the MDN type is inserted separately and directly on the magnetic core (see figure n ° 8) and thus the or the secondaries are therefore directly and separately traversed by the magnetic flux circulating in the core of the transformer and are therefore not coaxially inserted one on the other as in the current state of the art which eliminates parasitic abilities ites and other limiting drawbacks of current ferrite transformers where primary (s) and secondary (s) which are coaxial and due to its construction the magnetic efficiency of the MDN type Ferrite Transformer is more efficient the losses are lower the various constituent elements make its manufacture particularly easy and less expensive as well as more suitable for industrial automation and this also makes it possible to produce models of ferrite transformers having a large number of primaries and secondaries because the external surfaces of the coils can comprise quantities of connection points or ( pins) not achievable on conventional transformers. Transformateur ferrite type MDN selon la revendication 1, caractérisé en ce que les figures 1, 1', et 1" montrent que deux pièces identiques viennent s'emboíter l'une dans l'autre pour constituer le core ou noyau magnétique du transformateur.MDN type ferrite transformer according to claim 1, characterized in that FIGS. 1, 1 ′, and 1 "show that two identical parts fit into one another to constitute the core or magnetic core of the transformer. Transformateur ferrite type MDN selon la revendication 1, caractérisé selon les dessins 4, 4', et 5, en ce que les enroulements primaire(s) et secondaire(s) sont enroulés séparément sur deux bobines de formes et diamètres pouvant être identiques, et que ces bobines sont insérées sur une demi forme du noyau magnétique, l'autre demi forme étant ensuite assemblée à la première demi forme au travers de chacune des deux bobines.MDN type ferrite transformer according to claim 1, characterized according to drawings 4, 4 ', and 5, in that the primary (s) and secondary (s) windings are wound separately on two coils of identical shapes and diameters, and that these coils are inserted on a half form of the magnetic core, the other half form then being assembled to the first half form through each of the two coils. Transformateur ferrite type MDN selon la revendication 1, caractérisé en ce que la section du noyau magnétique peut être cylindre, carré, hexagonal, ou de toutes autres formes souhaitées (voir figure 3' et 3"). MDN type ferrite transformer according to claim 1, characterized in that the section of the magnetic core can be cylinder, square, hexagonal, or of any other desired shape (see FIG. 3 'and 3 "). Transformateur ferrite type MDN selon la revendication 1, caractérisé en ce que la forme résultante de l'assemblage des deux demi noyaux peut être rectangulaire, ovale, cylindrique, ou de toutes autres formes souhaitées. (voir exemple figure 3 et 5)MDN type ferrite transformer according to claim 1, characterized in that the shape resulting from the assembly of the two half-cores can be rectangular, oval, cylindrical, or of any other desired shape. (see example in figure 3 and 5) Transformateur ferrite type MDN selon la revendication 1, caractérisé en ce que les deux demi formes (figures 1 et 1') constitutives du core ou noyau magnétique comportent une rainure sur leurs pourtours extérieurs, rainure destinée à y passer un fil nylon ou de toutes autres matières pour maintenir assemblées les deux demi formes (1 et 1') une fois l'ensemble noyau magnétique et bobines monté.DND type ferrite transformer according to claim 1, characterized in that the two half-forms (Figures 1 and 1 ') constituting the magnetic core or core have a groove on their outer edges, groove intended to pass a nylon wire therein or any other materials to keep the two half-forms (1 and 1 ') assembled once the magnetic core and coils assembly is assembled. Transformateur ferrite type MDN selon la revendication 1, caractérisé en ce que les deux demi formes formant le noyau magnétique viennent s'emboíter l'une dans l'autre et que les profils permettant l'emboítement garantissent le positionnement correct de l'assemblage de ces deux demi formes.MDN type ferrite transformer according to claim 1, characterized in that the two half-forms forming the magnetic core fit into one another and that the profiles allowing the nesting guarantee the correct positioning of the assembly of these two half forms. Transformateur ferrite type MDN selon la revendication 1, caractérisé en ce que une fois le transformateur type MDN assemblé, celui-ci peut être aisément démonté un nombre de fois illimitée par simple coupure du fil de maintien passant dans la rainure périphérique extérieure des deux demi formes.MDN type ferrite transformer according to claim 1, characterized in that once the MDN type transformer has been assembled, it can be easily dismantled an unlimited number of times by simply cutting the retaining wire passing through the outer peripheral groove of the two half-shapes . Transformateur ferrite type MDN selon la revendication 1, caractérisé en ce que les bobines sur lesquelles viennent s'enrouler primaire(s) et secondaire(s) sont de formes et de diamètres pouvant être identiques et que leur section qui comporte les enroulements peut être carrée, afin de garantir une densité de flux magnétique optimum.MDN type ferrite transformer according to claim 1, characterized in that the coils on which primary (s) and secondary (s) are wound are of identical shapes and diameters and that their section which includes the windings can be square , in order to guarantee an optimum magnetic flux density. Transformateur ferrite type MDN selon la revendication 1, caractérisé en ce que les bobines primaire(s) et secondaire(s) comportent des encoches et picots de connexions ou (pins) sur leurs faces extérieures (voir figure 4'), ceci permettant d'y connecter aisément un très grand nombre de primaire(s) et de secondaire(s) et d'ensuite venir souder ces pins ou picots sur un circuit imprimé, selon un exemple de positionnement (voir figure 5).MDN type ferrite transformer according to claim 1, characterized in that the primary (s) and secondary (s) coils have notches and connection pins or (pins) on their external faces (see FIG. 4 '), this making it possible to easily connect a large number of primary (s) and secondary (s) and then solder these pins or pins on a printed circuit, according to an example of positioning (see Figure 5). Transformateur ferrite type MDN selon la revendication 1, caractérisé en ce que les bobines qui comportent les picots peuvent recevoir un circuit imprimé sur chacun de leurs côtés, soit au total deux ou plus circuits imprimés (voir figure 5).MDN type ferrite transformer according to claim 1, characterized in that the coils which comprise the pins can receive a printed circuit on each of their sides, that is to say two or more printed circuits (see FIG. 5). Transformateur ferrite type MDN selon la revendication 1, caractérisé en ce que les picots peuvent être prévus en tous points de l'extérieur des bobines, ceci permettant de prévoir un montage libre et en tous sens du transformateur type MDN.MDN type ferrite transformer according to claim 1, characterized in that the pins can be provided at all points on the outside of the coils, this making it possible to provide free mounting in all directions of the MDN type transformer.
EP01120072A 2001-08-21 2001-08-21 High frequency ferrite transformer Withdrawn EP1286369A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01120072A EP1286369A1 (en) 2001-08-21 2001-08-21 High frequency ferrite transformer

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Application Number Priority Date Filing Date Title
EP01120072A EP1286369A1 (en) 2001-08-21 2001-08-21 High frequency ferrite transformer

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EP1286369A1 true EP1286369A1 (en) 2003-02-26

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1564557A1 (en) * 1966-04-01 1969-10-02 Siemens Ag Ferromagnetic core composed of two essentially equal parts for electrical coils or the like.
US4047138A (en) * 1976-05-19 1977-09-06 General Electric Company Power inductor and transformer with low acoustic noise air gap
DE2744711A1 (en) * 1977-10-05 1979-04-12 Waasner B Two-part shell transformer core - has tongue and groove interlocking parts in centre region of diagonal join of middle limb
US4283699A (en) * 1980-03-06 1981-08-11 Siemens Aktiengesellschaft Holder for an electromagnetic coil
US4661792A (en) * 1986-06-23 1987-04-28 Basler Electric Company Apparatus for mounting printed circuit boards
US5847518A (en) * 1996-07-08 1998-12-08 Hitachi Ferrite Electronics, Ltd. High voltage transformer with secondary coil windings on opposing bobbins

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1564557A1 (en) * 1966-04-01 1969-10-02 Siemens Ag Ferromagnetic core composed of two essentially equal parts for electrical coils or the like.
US4047138A (en) * 1976-05-19 1977-09-06 General Electric Company Power inductor and transformer with low acoustic noise air gap
DE2744711A1 (en) * 1977-10-05 1979-04-12 Waasner B Two-part shell transformer core - has tongue and groove interlocking parts in centre region of diagonal join of middle limb
US4283699A (en) * 1980-03-06 1981-08-11 Siemens Aktiengesellschaft Holder for an electromagnetic coil
US4661792A (en) * 1986-06-23 1987-04-28 Basler Electric Company Apparatus for mounting printed circuit boards
US5847518A (en) * 1996-07-08 1998-12-08 Hitachi Ferrite Electronics, Ltd. High voltage transformer with secondary coil windings on opposing bobbins

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