FR2674674A1 - HOMOPOLAR TRANSFORMER WITH MAGNETIC CIRCUIT INSENSITIVE TO MECHANICAL STRESSES, AND MANUFACTURING METHOD. - Google Patents
HOMOPOLAR TRANSFORMER WITH MAGNETIC CIRCUIT INSENSITIVE TO MECHANICAL STRESSES, AND MANUFACTURING METHOD. Download PDFInfo
- Publication number
- FR2674674A1 FR2674674A1 FR9103831A FR9103831A FR2674674A1 FR 2674674 A1 FR2674674 A1 FR 2674674A1 FR 9103831 A FR9103831 A FR 9103831A FR 9103831 A FR9103831 A FR 9103831A FR 2674674 A1 FR2674674 A1 FR 2674674A1
- Authority
- FR
- France
- Prior art keywords
- magnetic circuit
- homopolar
- homopolar transformer
- shell
- shells
- 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
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 230000035699 permeability Effects 0.000 claims abstract description 7
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 6
- 239000000725 suspension Substances 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims abstract description 4
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 3
- 239000003292 glue Substances 0.000 claims description 9
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 230000006355 external stress Effects 0.000 abstract 1
- 238000004026 adhesive bonding Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
-
- 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
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase AC
- H01F38/28—Current transformers
- H01F38/30—Constructions
- H01F2038/305—Constructions with toroidal magnetic core
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Coils Or Transformers For Communication (AREA)
- Transformers For Measuring Instruments (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Emergency Protection Circuit Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
L'invention est relative à un transformateur homopolaire ayant un circuit magnétique formé par l'enroulement d'une bande ferromagnétique à perméabilité élevée. Pour éviter l'influence des contraintes extérieures sur la perméabilité du matériau, la face frontale (24) du circuit magnétique (10) est solidarisée au fond (26) de la demi-coquille (18) par trois gouttes de colle (28) à base de silicone formant une liaison à suspension élastique. Application: interrupteurs et disjoncteurs à protection différentielle.The invention relates to a homopolar transformer having a magnetic circuit formed by the winding of a ferromagnetic strip with high permeability. To avoid the influence of external stresses on the permeability of the material, the front face (24) of the magnetic circuit (10) is secured to the bottom (26) of the half-shell (18) by three drops of adhesive (28) to silicone base forming an elastic suspension bond. Application: switches and circuit breakers with differential protection.
Description
TRANSFORMATEUR HOMOPOLAIRE A CIRCUIT MAGNETIQUE INSENSIBLE AHOMOPOLAR TRANSFORMER WITH INSENSITIVE MAGNETIC CIRCUIT
DES CONTRAINTES MECANIQUES, ET PROCEDE DE FABRICATION MECHANICAL CONSTRAINTS AND METHOD OF MANUFACTURE
L'invention est relative à un transformateur homopolaire, notamment pour un interrupteur ou un disjoncteur différentiel, comprenant un circuit magnétique cylindrique formé par l'enroulement d'une bande ferromagnétique présentant une perméabilité magnétique élevée, notamment un alliage fer-nickel et une enveloppe en matériau isolant moulé, constituée par l'assemblage de deux demi-coquilles conjuguées délimitant un The invention relates to a homopolar transformer, in particular for a switch or a differential circuit breaker, comprising a cylindrical magnetic circuit formed by the winding of a ferromagnetic strip having a high magnetic permeability, in particular an iron-nickel alloy and an envelope molded insulating material constituted by the assembly of two conjugated half-shells delimiting a
espace interne annulaire de logement du circuit magnétique. internal annular space housing the magnetic circuit.
Les tores utilisés comme transformateurs totalisateurs de courants dans le S dispositifs de protection différentielle utilisent généralement des alliages à base de fer-nickel présentant des perméabilités magnétiques très élevées, notamment entre 50 000 et 500 000 Ces matériaux sont très sensibles aux contraintes mécaniques latérales qui peuvent prendre naissance à l'occasion d'une variation de pression, de chocs ou de vibrations L'effet peut se traduire par une diminution de la perméabilité du matériau constitutif du circuit magnétique, avec une élévation correspondante du seuil de déclenchement différentiel, au détriment de la sensibilité du The toroids used as total current transformers in the S differential protection devices generally use iron-nickel-based alloys with very high magnetic permeabilities, in particular between 50 000 and 500 000. These materials are very sensitive to lateral mechanical stresses which can arising from a variation of pressure, shocks or vibrations The effect may result in a decrease in the permeability of the material constituting the magnetic circuit, with a corresponding rise in the differential tripping threshold, to the detriment of the sensitivity of
dispositif de protection différentielle. differential protection device.
Selon un dispositif connu illustré à la figure 1, les faces frontales opposées du circuit magnétique 10 cylindrique sont protégées au moyen d'une paire de rondelles 12,14 annulaires en mousse de polyuréthane Ces rondelles 12,14 se trouvent en appui contre le fond de chaque demicoquille 16,18 de l'enveloppe 20 isolante, et sont conformées en amortisseurs entre le circuit magnétique 10 et l'enveloppe 20 L'effet d'amortissement des rondelles 12,14 s'exerce dans le sens axial, et l'enveloppe 20 présente un jeu fonctionnel 21 transversal agencé pour interdire toute transmission de contraintes mécaniques dans le sens radial. La mise en place des rondelles 12,14 de mousse à l'intérieur des demi-coquilles 16,18 s'effectue manuellement avant l'insertion du circuit magnétique 10 Une bande 22 adhésive est ensuite collée sur l'interface extérieure des demi-coquilles 16,18 aboutées pour fermer l'enveloppe 20 Le montage d'un tel According to a known device illustrated in FIG. 1, the opposite end faces of the cylindrical magnetic circuit 10 are protected by means of a pair of annular washers 12, 14 made of polyurethane foam. These washers 12, 14 are in abutment against the bottom of the housing. each half-shell 16,18 of the insulating jacket 20, and are shaped as dampers between the magnetic circuit 10 and the casing 20 The damping effect of the washers 12,14 is exerted in the axial direction, and the casing 20 has a transverse functional clearance 21 arranged to prohibit any transmission of mechanical stresses in the radial direction. The introduction of the washers 12,14 of foam inside the half-shells 16,18 is done manually before the insertion of the magnetic circuit 10 An adhesive band 22 is then glued on the outer interface of the half-shells 16,18 butted to close the envelope 20 The assembly of such
transformateur homopolaire est possible en manuel. Homopolar transformer is possible in manual.
L'automatisation du montage nécessiterait des opérations automatiques de distribution et de positionnement, qui sont Automation of assembly would require automatic dispensing and positioning operations, which are
difficilement réalisables avec l'emploi de rondelles de mousse. difficult to achieve with the use of foam discs.
L'objet de l'invention consiste à réaliser un transformateur homopolaire insensible à des contraintes mécaniques, et à fabriquer ledit transformateur avec un procédé de montage automatique. Le transformateur homopolaire selon l'invention est caractérisé en ce que l'une des faces frontales du circuit magnétique cylindrique est solidarisée au fond de l'une des demi-coquilles par des moyens de collage, assurant une liaison à suspension élastique, et que les autres faces du circuit magnétique sont The object of the invention is to provide a homopolar transformer insensitive to mechanical stresses, and to manufacture said transformer with an automatic mounting method. The homopolar transformer according to the invention is characterized in that one of the end faces of the cylindrical magnetic circuit is secured to the bottom of one of the half-shells by bonding means, providing a connection with elastic suspension, and that the other faces of the magnetic circuit are
séparées de l'enveloppe par des jeux fonctionnels. separated from the envelope by functional games.
Les moyens de collage sont réalisés à partir d'une colle à base de silicone. La suspension élastique du circuit magnétique à l'intérieur de l'espace interne le libère de toute contrainte mécanique due à des chocs ou vibrations en provenance de l'extérieur La perméabilité du matériau ferromagnétique reste alors invariable. Selon un mode de réalisation, les moyens de collage sont constitués par trois gouttes de colle disposées à 120 degrés sur The gluing means are made from a silicone-based glue. The elastic suspension of the magnetic circuit inside the internal space releases it from any mechanical stress due to shocks or vibrations coming from outside. The permeability of the ferromagnetic material then remains invariable. According to one embodiment, the gluing means consist of three drops of glue arranged at 120 degrees on
le fond annulaire de la demi-coquille. the annular bottom of the half-shell.
D'autres avantages et caractéristiques ressortiront plus Other benefits and features will come out more
clairement de la description qui va suivre d'un exemple de clearly from the following description of an example of
réalisation de l'invention, représenté au dessin annexé, dans lequel: La figure 1 est une vue shématique en coupe d'un transformateur homopolaire selon l'art antérieur, les enroulements primaire et embodiment of the invention, shown in the accompanying drawing, in which: Figure 1 is a schematic sectional view of a homopolar transformer according to the prior art, the primary windings and
secondaire n'étant pas représentés. secondary school not being represented.
La figure 2 est une vue identique de la figure 1, d'un FIG. 2 is an identical view of FIG.
transformateur selon l'invention.transformer according to the invention.
Sur la figure 2, le circuit magnétique 10 à bande enroulée en alliage fer-nickel est solidarisé par l'une 24 de ses faces frontales sur le fond 26 à l'intérieur de la demi-coquille 18 La fixation du circuit magnétique 10 est effectuée par collage grâce à trois gouttes 28 de colle silicone déposées à 120 degrés sur le fond 26 annulaire, préalablement à la mise en place du In FIG. 2, the magnetized strip 10 made of iron-nickel alloy is secured by one of its end faces to the bottom 26 inside the half-shell 18. The magnetic circuit 10 is fixed. by gluing with three drops 28 of silicone glue deposited at 120 degrees on the annular bottom 26, prior to the introduction of the
circuit magnétique 10.magnetic circuit 10.
En plus des jeux fonctionnels 21 radiaux, la face frontale supérieure 30 du circuit magnétique 10 est séparée du fond 32 de In addition to the radial functional clearances, the upper end face 30 of the magnetic circuit 10 is separated from the bottom 32 of
la demi-coquille 16 par un jeu fonctionnel 34 axial. the half-shell 16 by a functional game 34 axial.
Après séchage, les trois goutttes 28 de colle silicone sur le fond 26 assurent une suspension élastique sans contrainte du circuit magnétique 10 à l'intérieur de l'espace 36 interne After drying, the three drops 28 of silicone glue on the bottom 26 provide an elastic suspension without stress of the magnetic circuit 10 inside the internal space 36
annulaire de l'enveloppe 20.annular of the envelope 20.
La présence des jeux 21,34 par rapport aux autres faces de l'espace 36 évite toute propagation de chocs extérieurs vers le The presence of the games 21, 34 relative to the other faces of the space 36 prevents any propagation of external shocks towards the
circuit magnétique 10.magnetic circuit 10.
Les extrémités d'assemblage des demi-coquilles 16,18 comportent des moyens d'encliquetage 38 mâle et femelle, évitant l'usage de bande adhésive à la fin du montage du transformateur homopolaire. Les opérations de dépôt des gouttes de colle 28, de mise en place du circuit magnétique 10 dans la demi-coquille 18, et d'encliquetage des deux demi- coquilles 16,18 peuvent être The assembly ends of the half-shells 16, 18 comprise male and female latching means 38, avoiding the use of adhesive tape at the end of the mounting of the homopolar transformer. The deposition operations of the glue drops 28, the introduction of the magnetic circuit 10 into the half-shell 18, and the latching of the two half-shells 16, 18 may be
facilement effectuées en automatique. easily done automatically.
Il est clair que la colle silicone peut être remplacée par tout It is clear that silicone glue can be replaced by any
autre moyen de fixation élastique équivalent. other equivalent elastic fastening means.
Claims (5)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9103831A FR2674674B1 (en) | 1991-03-27 | 1991-03-27 | HOMOPOLAR TRANSFORMER WITH MAGNETIC CIRCUIT INSENSITIVE TO MECHANICAL CONSTRAINTS, AND MANUFACTURING METHOD THEREOF. |
| DE1992604346 DE69204346T2 (en) | 1991-03-27 | 1992-03-13 | Homopolar transformer with magnetic circuit insensitive to mechanical stress, and manufacturing process. |
| ES92420074T ES2079164T3 (en) | 1991-03-27 | 1992-03-13 | HOMOPOLAR TRANSFORMER WITH MAGNETIC CIRCUIT INSENSITIVE TO MECHANICAL VOLTAGES, AND MANUFACTURING PROCEDURE. |
| EP92420074A EP0509936B1 (en) | 1991-03-27 | 1992-03-13 | Homopolar transformer with magnetic circuit insensitive to mechanical stresses, and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9103831A FR2674674B1 (en) | 1991-03-27 | 1991-03-27 | HOMOPOLAR TRANSFORMER WITH MAGNETIC CIRCUIT INSENSITIVE TO MECHANICAL CONSTRAINTS, AND MANUFACTURING METHOD THEREOF. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2674674A1 true FR2674674A1 (en) | 1992-10-02 |
| FR2674674B1 FR2674674B1 (en) | 1993-10-22 |
Family
ID=9411259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9103831A Expired - Fee Related FR2674674B1 (en) | 1991-03-27 | 1991-03-27 | HOMOPOLAR TRANSFORMER WITH MAGNETIC CIRCUIT INSENSITIVE TO MECHANICAL CONSTRAINTS, AND MANUFACTURING METHOD THEREOF. |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0509936B1 (en) |
| DE (1) | DE69204346T2 (en) |
| ES (1) | ES2079164T3 (en) |
| FR (1) | FR2674674B1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9312004U1 (en) * | 1993-08-11 | 1993-11-25 | Siemens Matsushita Components GmbH & Co. KG, 81541 München | Electrical component in chip design |
| JPH09246034A (en) * | 1996-03-07 | 1997-09-19 | Alps Electric Co Ltd | Pulse transformer core |
| DE59804488D1 (en) * | 1997-09-29 | 2002-07-25 | Epcos Ag | Inductive component and method for its production |
| DE29806050U1 (en) | 1998-04-02 | 1998-08-13 | Abb Patent Gmbh, 68309 Mannheim | Receptacle for a toroidal core transformer, preferably for a residual current circuit breaker |
| DE10134056B8 (en) | 2001-07-13 | 2014-05-28 | Vacuumschmelze Gmbh & Co. Kg | Process for the production of nanocrystalline magnetic cores and apparatus for carrying out the process |
| DE102007034532A1 (en) | 2007-07-24 | 2009-02-05 | Vacuumschmelze Gmbh & Co. Kg | Magnetic core, process for its production and residual current circuit breaker |
| KR101228497B1 (en) * | 2011-11-25 | 2013-01-31 | 주식회사 이랜텍 | Transformer of improved joint strength |
| DE102012201002B4 (en) | 2012-01-24 | 2022-10-06 | Siemens Aktiengesellschaft | Summation current transformer housing, summation current transformer and residual current circuit breaker |
| KR101966749B1 (en) * | 2015-12-11 | 2019-04-08 | 주식회사 아모그린텍 | Current transformer with magnetic shielding |
| CN105976992A (en) * | 2016-07-05 | 2016-09-28 | 佛山诺亚电器有限公司 | High-overload internal protection distribution transformer |
| DE102018106449A1 (en) * | 2018-03-20 | 2019-09-26 | Vacuumschmelze Gmbh & Co. Kg | Magnetic assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2523766A1 (en) * | 1982-03-22 | 1983-09-23 | Merlin Gerin | AC or DC differential leakage current detector - includes transformer linkage between two mains wires and oscillator detector controlling cut=out relay |
| EP0162488A1 (en) * | 1984-04-13 | 1985-11-27 | Koninklijke Philips Electronics N.V. | Transfromer comprising coacxial coil formers |
| JPH0239403A (en) * | 1988-07-28 | 1990-02-08 | Nagano Japan Radio Co | Method for fixing magnetic core |
| JPH0266908A (en) * | 1988-08-31 | 1990-03-07 | Nippon Ferrite Ltd | Magnetic core |
| JPH0319307A (en) * | 1989-06-16 | 1991-01-28 | Hitachi Ferrite Ltd | Magnetic core |
-
1991
- 1991-03-27 FR FR9103831A patent/FR2674674B1/en not_active Expired - Fee Related
-
1992
- 1992-03-13 EP EP92420074A patent/EP0509936B1/en not_active Expired - Lifetime
- 1992-03-13 ES ES92420074T patent/ES2079164T3/en not_active Expired - Lifetime
- 1992-03-13 DE DE1992604346 patent/DE69204346T2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2523766A1 (en) * | 1982-03-22 | 1983-09-23 | Merlin Gerin | AC or DC differential leakage current detector - includes transformer linkage between two mains wires and oscillator detector controlling cut=out relay |
| EP0162488A1 (en) * | 1984-04-13 | 1985-11-27 | Koninklijke Philips Electronics N.V. | Transfromer comprising coacxial coil formers |
| JPH0239403A (en) * | 1988-07-28 | 1990-02-08 | Nagano Japan Radio Co | Method for fixing magnetic core |
| JPH0266908A (en) * | 1988-08-31 | 1990-03-07 | Nippon Ferrite Ltd | Magnetic core |
| JPH0319307A (en) * | 1989-06-16 | 1991-01-28 | Hitachi Ferrite Ltd | Magnetic core |
Non-Patent Citations (3)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 14, no. 190 (E-918)(4133) 18 Avril 1990 & JP-A-2 039 403 ( NAGANO NIPPON MUSEN ) 8 Février 1990 * |
| PATENT ABSTRACTS OF JAPAN vol. 14, no. 241 (E-931)(4184) 22 Mai 1990 & JP-A-2 066 908 ( NIPPON FERRITE ) 7 Mars 1990 * |
| PATENT ABSTRACTS OF JAPAN vol. 15, no. 139 (E-1053)(4667) 9 Avril 1991 & JP-A-3 019 307 ( NIPPON FERRITE ) 28 Janvier 1991 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0509936B1 (en) | 1995-08-30 |
| DE69204346T2 (en) | 1996-04-18 |
| ES2079164T3 (en) | 1996-01-01 |
| DE69204346D1 (en) | 1995-10-05 |
| EP0509936A3 (en) | 1993-05-19 |
| EP0509936A2 (en) | 1992-10-21 |
| FR2674674B1 (en) | 1993-10-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CA | Change of address | ||
| CD | Change of name or company name | ||
| CJ | Change in legal form | ||
| TP | Transmission of property | ||
| ST | Notification of lapse |
Effective date: 20091130 |