EP0236642B1 - High-voltage transformer - Google Patents
High-voltage transformer Download PDFInfo
- Publication number
- EP0236642B1 EP0236642B1 EP86402729A EP86402729A EP0236642B1 EP 0236642 B1 EP0236642 B1 EP 0236642B1 EP 86402729 A EP86402729 A EP 86402729A EP 86402729 A EP86402729 A EP 86402729A EP 0236642 B1 EP0236642 B1 EP 0236642B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transformer
- voltage
- connection
- connection device
- chimney
- 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.)
- Expired - Lifetime
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- 239000004020 conductor Substances 0.000 claims description 19
- 238000004804 winding Methods 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 claims 1
- 239000008188 pellet Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
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- 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
- H01F38/42—Flyback transformers
-
- 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
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- 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
- H01F38/42—Flyback transformers
- H01F2038/423—Flyback transformers with adjusting potentiometers
Definitions
- the present invention relates to a high voltage connection device, in particular for a high voltage transformer without high voltage output cables and with a removable potentiometric block.
- a high voltage (HV) connection such as a car spark plug connection, is generally made using at least one terminal crimped on the connecting wire, this terminal can be a female terminal coming to cover a terminal or a male thimble, or possibly a male thimble fitting into a bowl or a female thimble.
- HV high voltage
- a high-voltage transformer intended for the supply of color cathode-ray tubes comprises an integrated potentiometric block which delivers the voltages of the grids of prefocusing G3 and screen G2 of these tubes.
- the high voltage cable and the output cables of the gates G2 and G3 are fixed and integral with the transformer. These cables, of varying lengths depending on the users, constitute a hindrance to the manufacture, handling, and mounting of the transformers.
- the potentiometric block, integrated into the transformer requires internal wiring operations which can affect the reliability of the product.
- Document FR-E-71570 discloses an oscillation blocking element for an automobile ignition beam.
- This blocking element comprises a sleeve of insulating material in which is disposed a pellet of elastic conductive material.
- the patch includes, before mounting in the sleeve, its own output connectors. We cannot therefore use this device to ensure the connection between removable conductors.
- a pellet of conductive elastic material is placed in an insulating sleeve in each end of which a cavity is formed intended to receive a component such as a spark plug head. This second embodiment also does not allow the connection between removable conductors with rigid core.
- the subject of the present invention is a HT connection device between at least two removable conductors with a rigid core, a device which is reliable, offers a durable connection of good quality, which is easy and quick to implement and does not require any special equipment.
- the present invention also relates to a connection device for a high voltage transformer whose output cables such as the cable connecting to the potentiometric block and the high voltage cable are removable and establish a reliable connection as simple as possible.
- the high-voltage connection device is a connection device between at least two removable conductors with rigid core, said device comprising a sleeve of insulating material in which is fixed a silicone wafer loaded with conductive powder in the faces of which the stripped ends of these conductors can be inserted easily.
- the high voltage transformer includes removable connection means for connecting high voltage output cables to it.
- These means comprise, for each output of the transformer, a quick cable hooking device and a device for contacting the conductor or the core of the cable.
- the quick coupling device is a clipping device comprising a first part integral with a "chimney" molded integrally with the envelope covering the coating insulation of the transformer winding , the internal diameter of this chimney being substantially equal to the external diameter of the cable, the base of this chimney being located above or near the corresponding terminal or outlet, this terminal or outlet being connected to a conductive pad, preferably made of silicone loaded with conductive material, this pellet sealingly closing the base of the chimney, the second part of the clipping device being fixed on the cable near its end and positioned so that the end of the conductor or of the cable core is in good contact with said pad when the end of the cable is pressed into the chimney and the two parts of the quick coupling device are in mutual engagement.
- FIG. 4 shows a HT connection device according to the invention.
- the example shown relates to the connection between an automobile spark plug and a THT supply wire for this spark plug, but it should be understood that the invention is not limited to such an application and can be used to establish any connection HT, or even low voltage, provided that a low current is passed through it.
- a sleeve 32 is produced. made of rigid insulating material having approximately in its middle a constriction 33.
- One of the ends of the sleeve 32 comes to cap the spark plug 30, the constriction 33 forming a stop for the upper part of the spark plug.
- an inner groove can be made near the edge of this end of the sleeve, in which there is an appropriate seal 34.
- the spark plug electrode ends in an axial metal tip. 35.
- a conductive pad 36 is inserted by slightly forcing it, coming into abutment on the constriction 33.
- the length of said other end of the sleeve 32 is greater than the length of the patch 36, which is fixed there by a ring 37 which can be either screwed, glued or force-fitted.
- the hole in the ring 37 is cylindrical towards the outside of the sleeve and conical towards the patch 36.
- the cylindrical part of this hole has a diameter slightly smaller than the external diameter of the insulator of the wire 31, while its conical part serves to guide, if necessary, the stripped end (end of the core) 38 of the wire 31, which sinks into the patch 36.
- the ring 37 advantageously acts as a sealing means for the connection on the side of the wire 31.
- the tip 35 is inserted into the pad 36 opposite the core 38.
- the pad 36 is advantageously made of silicone charged with electrically conductive powder.
- the tip 35 and the core 38 can be inserted easily, without necessarily being sharp and without the risk of twisting, the core 38 having to be relatively rigid nonetheless.
- connection device of the present invention is explained below with reference to a high voltage transformer for television, with a focusing voltage output and a high voltage output for the anode of the cathode ray tube, but it is of course, the invention applies to high voltage transformers for televisions having a different number of outputs, as well as to high voltage transformers reserved for other uses.
- the high voltage transformer 1 shown in FIG. 1 essentially comprises a magnetic circuit 2 and a winding 3 (not shown in detail) with several windings.
- This transformer can for example be of the "split diode" type, that is to say of the type with fractional secondary winding, with separation by diodes.
- the winding 3 is coated with a molding resin, in a leaktight manner, this coating being coated with a protective envelope which is not shown.
- the transformer 1 has on one of its faces, for example the underside, several pins 4 connected to primary windings, and possibly low-voltage secondary windings of the winding 3, these pins 4 being intended to fix the transformer 1 on a printed circuit. appropriate and to establish electrical connections with the conductors of this printed circuit.
- the transformer 1 comprises, in the present case, two high voltage outputs: a focusing voltage output, for supplying, via a cable and a potentiometric block, the grids G2 and G3 of a cathode ray tube (not shown) of which l the anode is supplied with very high voltage via a cable 6 via another output of this transformer.
- the chimneys 7 and 8 communicate with the interior space of said envelope, and in particular with the connection terminals of the sockets or ends of corresponding high-voltage windings. These chimneys can either stop at their base or junction with the envelope loppe, or, as shown in the drawing, extend inside the envelope to reach the connection terminals, the conduit 9 thus formed inside the envelope can be used to accommodate elements such as resistors, capacitors, protective elements, etc.
- the chimney 7 comprises, substantially at its base, a slight conical constriction 10, flaring outwards, allowing the end of the cable to be properly centered in the chimney. Just after this throttling, inwards, there is in the chimney 7, and in the present case more precisely in the conduit 9, a pellet 11 of conductive material, sealingly closing the chimney. According to a preferred embodiment of the invention, this pellet is made of silicone loaded with powder having good electrical conduction.
- a conductor 12 is inserted into the inner face of the patch 11, connected in a manner not shown, to the high-voltage winding providing the focusing voltage necessary for the gates G2 and G3.
- the conductor 13 of a discharge resistor 14 called “bleeder” is inserted into the internal face of the patch 11, the other conductor of this resistance being inserted, not shown, in the internal face of the chimney disc 8.
- a hook device 15 is fitted onto the end of the cable 5, appearing for example, as shown in the drawing, in the form of a socket, one of the ends of which flares out in a conical flange 16 and the other end of which is split along one or two generators.
- the inside diameter of this socket is substantially equal to the outside diameter of the cable 5.
- the chimney 7 has at its free end a clipping device 17 cooperating with the hook device 15.
- the device 17 is a lug or a protuberance formed on the inner wall of the chimney 7.
- the clipping device is a cylindrical sleeve threaded onto the chimney and comprising such a lug.
- the dimensions of the flange 16 of the lug 17 are such that they can be clipped by firmly holding the cable 5 in the chimney 7, and that one can, if necessary, remove the cable 5 by exerting a strong force. pull on this cable, without damaging them.
- the lug 17 can be made with the same material as that of the chimney 7, or can be metallic and attached to the chimney.
- the aforementioned sockets are made of suitable plastic.
- the socket forming the hook 15 is positioned on the cable 5 so that the stripped end 18 of this cable sinks at least 3 mm into the pad 10 when the hook and the latch are clipped in order to ensure good electrical contact and avoid the formation of ozone.
- FIG. 2 shows a simplified potentiometric block 19, comprising the potentiometers 20 and 21.
- the cursors of the potentiometers 20 and 21 are connected, in a manner not shown, by the cables 22 and 23 to the grids G2 and G3 respectively, of the cathode ray tube supplied by the transformer 1.
- This potentiometric block 19 is either part of one of the printed circuits of the television set, or is fixed on one of these circuits.
- One end of the cable 5 is connected to the transformer, the other end of the cable 5 is connected to this block, advantageously by a connection device with a conductive pad similar to that fitted to the chimney 7.
- the cables 22 and 23 can be fixed to the block 19 permanently or removably, and in the latter case, it is also possible to use a quick coupling device and conductive pads.
- FIG. 3 An embodiment for which the potentiometric block 24, with its potentiometers 25, 26 is fixed to one of the faces of the transformer by clipping (block 24 shown in solid lines for a first solution, and broken lines for two other possibilities).
- the connecting cables 27 and 28 to the grids G2 and G3 of the cathode ray tube can be fixed to the block 24 permanently or removable, in the latter case also using conductive pads.
- the removable fixing of the very high voltage cable 6, with its suction cup 6A, in the chimney 8 is similar to that of the cable 5 in the chimney 7, and will not be described in more detail.
- the high voltage transformer can be placed on its printed circuit in the position for which the influence of its radiation on its environment is the least, and the potentiometric block can be positioned where it is easy to carry out the settings of its potentiometers.
- Another advantage of the invention is that it makes it possible to dissociate the transformer from the potentiometric block and the corresponding cables, which simplifies repairs in the event of a failure of one of the elements.
- the transformer manufacturer no longer has to deal with bulky cables, and the user can install the elements of the high-voltage circuit at the end of manufacturing.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Coils Or Transformers For Communication (AREA)
- Details Of Television Scanning (AREA)
- Transformers For Measuring Instruments (AREA)
- Cable Accessories (AREA)
Description
La présente invention se rapporte à un dispositif de connexion haute tension, en particulier pour un transformateur haute tension sans câbles de sortie haute tension et à bloc potentiométrique amovible.The present invention relates to a high voltage connection device, in particular for a high voltage transformer without high voltage output cables and with a removable potentiometric block.
Une connexion haute tension (HT), telle qu'une connexion de bougie de voiture, est généralement réalisée à l'aide d'au moins une cosse sertie sur le fil de liaison, cette cosse pouvant être une cosse femelle venant coiffer une borne ou une cosse mâle, ou bien pouvant être une cosse mâle s'insérant dans une cuvette ou dans une cosse femelle. Une telle connexion nécessite donc de sertir sur le fil de liaison une cosse, ce qui nécessite un appareillage spécial.A high voltage (HV) connection, such as a car spark plug connection, is generally made using at least one terminal crimped on the connecting wire, this terminal can be a female terminal coming to cover a terminal or a male thimble, or possibly a male thimble fitting into a bowl or a female thimble. Such a connection therefore requires crimping a terminal on the connecting wire, which requires special equipment.
Généralement, un transformateur haute tension destiné à l'alimentation de tubes cathodiques couleur comporte un bloc potentiométrique intégré qui délivre les tensions des grilles de préfocalisation G3 et screen G2 de ces tubes. Cependant, le câble haute tension et les câbles de sortie des grilles G2 et G3 sont fixes et solidaires du transformateur. Ces câbles, de longueurs variables selon les utilisateurs, constituent une gêne à la fabrication, à la manipulation, et au montage des transformateurs. En outre, le bloc potentiométrique, intégré au transformateur, nécessite des opérations de câblage interne qui peuvent nuire à la fiabilité du produit.Generally, a high-voltage transformer intended for the supply of color cathode-ray tubes comprises an integrated potentiometric block which delivers the voltages of the grids of prefocusing G3 and screen G2 of these tubes. However, the high voltage cable and the output cables of the gates G2 and G3 are fixed and integral with the transformer. These cables, of varying lengths depending on the users, constitute a hindrance to the manufacture, handling, and mounting of the transformers. In addition, the potentiometric block, integrated into the transformer, requires internal wiring operations which can affect the reliability of the product.
On connaît d'après le document FR-E-71570 un élément de blocage d'oscillations pour faisceau d'allumage automobile. Cet élément de blocage comporte un manchon en matière isolante dans lequel est disposée une pastille en matière élastique conductrice. Selon un premier mode de réalisation, la pastille comporte, avant montage dans le manchon, ses propres connecteurs de sortie. On ne peut donc utiliser ce dispositif pour assurer la connexion entre des conducteurs amovibles. Selon le second mode de réalisation décrit dans ce document, on dispose dans un manchon isolant une pastille en matière élastique conductrice dans chaque extrémité de laquelle on forme une cavité destinée à recevoir un composant tel qu'une tête de bougie. Ce second mode de réalisation ne permet pas non plus d'assurer la connexion entre des conducteurs amovibles à âme rigide.Document FR-E-71570 discloses an oscillation blocking element for an automobile ignition beam. This blocking element comprises a sleeve of insulating material in which is disposed a pellet of elastic conductive material. According to a first embodiment, the patch includes, before mounting in the sleeve, its own output connectors. We cannot therefore use this device to ensure the connection between removable conductors. According to the second embodiment described in this document, a pellet of conductive elastic material is placed in an insulating sleeve in each end of which a cavity is formed intended to receive a component such as a spark plug head. This second embodiment also does not allow the connection between removable conductors with rigid core.
La présente invention a pour objet un dispositif de connexion HT entre au moins deux conducteurs amovibles à âme rigide, dispositif qui soit fiable, offre une connexion durable de bonne qualité, qui soit facile et rapide à mettre en oeuvre et ne nécessite aucun appareillage spécial.The subject of the present invention is a HT connection device between at least two removable conductors with a rigid core, a device which is reliable, offers a durable connection of good quality, which is easy and quick to implement and does not require any special equipment.
La présente invention a également pour objet un dispositif de connexion pour un transformateur haute tension dont les câbles de sortie tels que le câble de liaison au bloc potentiométrique et le câble haute tension soient amovibles et établissent une connexion fiable la plus simple possible.The present invention also relates to a connection device for a high voltage transformer whose output cables such as the cable connecting to the potentiometric block and the high voltage cable are removable and establish a reliable connection as simple as possible.
Le dispositif de connexion haute tension selon l'invention est un dispositif de connexion entre au moins deux conducteurs amovibles à âme rigide, ledit dispositif comportant un manchon en matière isolante dans lequel est fixée une pastille en silicone chargé de poudre conductrice dans les faces de laquelle les extrémités dénudées de ces conducteurs peuvent être enfoncées facilement.The high-voltage connection device according to the invention is a connection device between at least two removable conductors with rigid core, said device comprising a sleeve of insulating material in which is fixed a silicone wafer loaded with conductive powder in the faces of which the stripped ends of these conductors can be inserted easily.
Le transformateur haute tension conforme à l'invention comporte des moyens de connexion amovible pour lui raccorder des câbles de sortie haute tension. Ces moyens comprennent, pour chaque sortie du transformateur un dispositif d'accrochage rapide de câble et un dispositif de contact avec le conducteur ou l'âme du câble. Selon un mode de réalisation préféré de l'invention, le dispositif d'accrochage rapide est un dispositif de clipsage comportant une première partie solidaire d'une "cheminée" moulée intégralement avec l'enveloppe recouvrant l'isolant d'enrobage du bobinage du transformateur, le diamètre intérieur de cette cheminée étant sensiblement égal au diamètre extérieur du câble, l'embase de cette cheminée étant située au-dessus ou à proximité de la borne ou prise de sortie correspondante, cette borne ou prise étant reliée à une pastille conductrice, de préférence en silicone chargé de matériau conducteur, cette pastille obturant de façon étanche l'embase de la cheminée, la seconde partie du dispositif de clipsage étant fixée sur le câble près de son extrémité et positionnée de telle façon que l'extrémité du conducteur ou de l'âme du câble soit en bon contact avec ladite pastille lorsque l'extrémité du câble est enfoncée dans la cheminée et que les deux parties du dispositif d'accrochage rapide sont en prise mutuelle.The high voltage transformer according to the invention includes removable connection means for connecting high voltage output cables to it. These means comprise, for each output of the transformer, a quick cable hooking device and a device for contacting the conductor or the core of the cable. According to a preferred embodiment of the invention, the quick coupling device is a clipping device comprising a first part integral with a "chimney" molded integrally with the envelope covering the coating insulation of the transformer winding , the internal diameter of this chimney being substantially equal to the external diameter of the cable, the base of this chimney being located above or near the corresponding terminal or outlet, this terminal or outlet being connected to a conductive pad, preferably made of silicone loaded with conductive material, this pellet sealingly closing the base of the chimney, the second part of the clipping device being fixed on the cable near its end and positioned so that the end of the conductor or of the cable core is in good contact with said pad when the end of the cable is pressed into the chimney and the two parts of the quick coupling device are in mutual engagement.
La présente invention sera mieux comprise à la lecture de la description détaillée de plusieurs modes de réalisation, pris comme exemples non limitatifs, et illustrée par le dessin annexé, sur lequel :
- - la figure 1 est une vue en coupe partielle d'un transformateur haute tension conforme à l'invention, avec deux câbles de sortie ;
- - la figure 2 est un vue de dessus très simplifiée d'un bloc potentiométrique disposé sur un circuit imprimé distinct du transformateur, ce bloc étant relié à un transformateur tel que celui de la figure 1 ;
- - la figure 3 est une vue de face très simplifiée d'un transformateur haute tension conforme à l'invention, montrant plusieurs possibilités de fixation du bloc potentiométrique, et
- - la figure 4 est une vue en coupe d'un dispositif de connexion HT conforme à l'invention.
- - Figure 1 is a partial sectional view of a high voltage transformer according to the invention, with two output cables;
- - Figure 2 is a very simplified top view of a potentiometric block arranged on a printed circuit separate from the transformer, this block being connected to a transformer such as that of Figure 1;
- FIG. 3 is a very simplified front view of a high voltage transformer according to the invention, showing several possibilities of fixing the potentiometric block, and
- - Figure 4 is a sectional view of a HT connection device according to the invention.
On a représenté sur la figure 4 un dispositif de connexion HT conforme à l'invention. L'exemple représenté se rapporte à la liaison entre une bougie d'automobile et un fil d'alimentation en THT de cette bougie, mais il est bien enetendu que l'invention n'est pas limitée à une telle application et peut être utilisée pour établir toute connexion HT, ou même basse tension, à condition que l'on y fasse passer un courant faible.FIG. 4 shows a HT connection device according to the invention. The example shown relates to the connection between an automobile spark plug and a THT supply wire for this spark plug, but it should be understood that the invention is not limited to such an application and can be used to establish any connection HT, or even low voltage, provided that a low current is passed through it.
Dans l'exemple de la figure 4, représenté lorsque la connexion est établie, il s'agit de réaliser une connexion entre une bougie d'allumage 30 et un fil d'alimentation en HT 31. A cet effet, on réalise un manchon 32 en matière isolante rigide comportant à peu près en son milieu un étranglement 33. L'une des extrémités du manchon 32 vient coiffer la bougie 30, l'étranglement 33 formant butée pour la partie supérieure de la bougie. Pour assurer l'étanchéité du côté de la bougie, on peut pratiquer près du rebord de cette extrémité du manchon une gorge intérieure dans laquelle on dispose un joint d'étanchéité approprié 34. L'électrode de la bougie se termine par une pointe métallique axiale 35.In the example of FIG. 4, shown when the connection is established, it involves making a connection between a
Dans l'autre extrémité du manchon 32, dont le profil intérieur est cylindrique, on insère en forçant légèrement une pastille conductrice 36, arrivant en butée sur l'étranglement 33. La longueur de ladite autre extrémité du manchon 32 est supérieure à la longueur de la pastille 36, qui y est fixée par une bague 37 qui peut y être soit vissée, soit collée, soit emmanchée à force. Le trou de la bague 37 est cylindrique vers l'extérieur du manchon et cônique vers la pastille 36. La partie cylindrique de ce trou a un diamètre légèrement inférieur au diamètre extérieur de l'isolant du fil 31, tandis que sa partie cônique sert à guider, le cas échéant, l'extrémité dénudée (extrémité de l'âme) 38 du fil 31, qui vient s'enfoncer dans la pastille 36. Ainsi, la bague 37 fait avantageusement office de moyen d'étanchéité de la connexion du côté du fil 31. La pointe 35 s'enfonce dans la pastille 36 à l'opposé de l'âme 38. La pastille 36 est avantageusement en silicone chargé de poudre électriquement conductrice. La pointe 35 ainsi que l'âme 38 peuvent s'y enfoncer facilement, sans être nécessairement pointues et sans risque de se tordre, l'âme 38 devant quand même être relativement rigide.In the other end of the
Bien entendu, une telle connexion ne permet pas de faire passer des courants très élevés, mais est très bien adaptée pour des courants faibles tels que ceux de bougies d'automobiles ou de transformateurs haute tension de télévision.Of course, such a connection does not allow very high currents to pass, but is very well suited for low currents such as those of automobile spark plugs or high voltage television transformers.
L'utilisation du dispositif de connexion de la présente invention est expliquée ci-dessous en référence à un transformateur haute tension pour téléviseur, avec une sortie de tension de focalisation et une sortie de haute tension pour l'anode du tube cathodique, mais il est bien entendu que l'invention s'applique à des transformateurs haute tension pour téléviseurs comportant un nombre différent de sorties, ainsi qu'à des transformateurs haute tension réservés à d'autres usages.The use of the connection device of the present invention is explained below with reference to a high voltage transformer for television, with a focusing voltage output and a high voltage output for the anode of the cathode ray tube, but it is of course, the invention applies to high voltage transformers for televisions having a different number of outputs, as well as to high voltage transformers reserved for other uses.
Le transformateur haute tension 1 représenté sur la figure 1 comporte essentiellement un circuit magnétique 2 et un bobinage 3 (non représenté en détail) à plusieurs enroulements. Ce transformateur peut par exemple être du type "split diode", c'est-à-dire du type à enroulement secondaire fractionné, à séparation par diodes. Le bobinage 3 est enrobé d'une résine de moulage, de façon étanche, cet enrobage étant revêtu d'une enveloppe protectrice non représentée.The
Le transformateur 1 comporte sur une de ses faces, par exemple la face inférieure, plusieurs broches 4 reliées à des enroulements primaires, et éventuellement des enroulements secondaires basse tension du bobinage 3, ces broches 4 étant destinées à fixer le transformateur 1 sur un circuit imprimé approprié et à établir des connexions électriques avec les conducteurs de ce circuit imprimé.The
Le transformateur 1 comporte, dans le cas présent, deux sorties à haute tension : une sortie de tension de focalisation, pour alimenter, via un câble et un bloc potentiométrique, les grilles G2 et G3 d'un tube cathodique (non représenté) dont l'anode est alimentée en très haute tension via un câble 6 par une autre sortie de ce transformateur.The
Sur la figure 1, on a représenté sur éclaté en coupe les détails de réalisation permettant la connexion de la sortie de tension de focalisation étant bien entendu que la connexion de l'autre sortie à haute tension est réalisée de façon similaire.In Figure 1, there is shown in exploded view in section the construction details allowing the connection of the focusing voltage output, it being understood that the connection of the other high voltage output is carried out in a similar manner.
Au moment du moulage de l'enveloppe de protection de la résine d'enrobage du bobinage 3, on prévoit de former en saillie sur l'enveloppe de protection, de préférence à l'opposé des broches 4, deux "cheminées" 7, 8 destinées à recevoir les extrémités des câbles 5, 6 respectivement. Ces cheminées sont suffisamment courtes pour ne pas constituer une gêne à l'utilisation et à la manipulation du transformateur, et pour ne pas les rendre fragiles, tout en étant assez longues pour éviter le contournement électrique avec toute partie reliée à la masse. Leur longueur extérieure peut avantageusement être de 2 à 4 cm environ. Leur épaisseur de parois, en particulier au niveau de leur embase, doit être suffisante pour ne pas les rendre fragiles, cette épaisseur étant avantageusement de 2 à 5 mm environ.At the time of molding of the protective envelope of the coating resin of the winding 3, provision is made to form projecting on the protective envelope, preferably opposite the
Les cheminées 7 et 8 communiquent avec l'espace intérieur de ladite enveloppe, et en particulier avec les bornes de connexion des prises ou extrémités d'enroulements haute tension correspondantes. Ces cheminées peuvent soit s'arrêter au niveau de leur embase ou jonction avec l'enveloppe, soit, comme représenté sur le dessin, se prolonger à l'intérieur de l'enveloppe pour rejoindre les bornes de connexion, le conduit 9 ainsi formé à l'intérieur de l'enveloppe pouvant servir à loger des éléments tels que résistances, condensateurs, éléments de protection, etc.The
La cheminée 7 comporte, sensiblement au niveau de son embase, un léger étranglement cônique 10, s'évasant vers l'extérieur, permettant de bien centrer l'extrémité du câble dans la cheminée. Juste après cet étranglement, vers l'intérieur, on dispose dans la cheminée 7, et dans le cas présent plus précisément dans le conduit 9, une pastille 11 en matériau conducteur, obturant de façon étanche la cheminée. Selon un mode de réalisation préféré de l'invention, cette pastille est en silicone chargé en poudre présentant une bonne conduction électrique.The
On enfonce dans la face intérieure de la pastille 11 un conducteur 12 relié de façon non représentée, à l'enroulement haute tension fournissant la tension de focalisation nécessaire aux grilles G2 et G3.A
De façon avantageuse, on enfonce dans la face intérieure de la pastille 11 le conducteur 13 d'une résistance de décharge 14 dite "bleeder", l'autre conducteur de cette résistance étant enfoncé, de façon non représentée, dans la face intérieure de la pastille de la cheminée 8.Advantageously, the
On enfile sur l'extrémité du câble 5 un dispositif de crochet 15, se présentant par exemple, comme représenté sur le dessin, sous forme d'une douille dont une des extrémités s'évase en collerette cônique 16 et dont l'autre extrémité est fendue selon une ou deux génératrices. Le diamètre intérieur de cette douille est sensiblement égal au diamètre extérieur du câble 5.A
Par ailleurs, la cheminée 7 comporte à son extrémité libre un dispositif d'enclipsage 17 coopérant avec le dispositif de crochet 15. Selon le mode de réalisation préféré représenté sur le dessin, le dispositif 17 est un ergot ou une protubérance formée sur la paroi intérieure de la cheminée 7. Selon un autre mode de réalisation (non représenté), le dispositif d'enclipsage est une douille cylindrique enfilée sur la cheminée et comportant un tel ergot. Les dimensions de la collerette 16 de l'ergot 17 sont telles qu'ils puissent s'enclipser en maintenant fermement le câble 5 dans la cheminée 7, et que l'on puisse, le cas échéant, retirer le câble 5 en exerçant une forte traction sur ce câble, sans les abîmer. L'ergot 17 peut être réalisé avec le même matériau que celui de la cheminée 7, ou peut être métallique et rapporté sur la cheminée. Les douilles précitées sont en matière plastique appropriée.Furthermore, the
La douille formant le crochet 15 est positionnée sur le câble 5 de façon que l'extrémité dénudée 18 de ce câble s'enfonce d'au moins 3 mm dans la pastille 10 à l'enclipsage du crochet et de l'ergot afin d'assurer un bon contact électrique et éviter la formation d'ozone.The socket forming the
On a représenté de façon simplifiée sur la figure 2 un bloc potentiométrique 19, comportant les potentiomètres 20 et 21. Les curseurs des potentiomètres 20 et 21 sont reliés, de façon non représentée, par les câbles 22 et 23 aux grilles G2 et G3 respectivement, du tube cathodique alimenté par le transformateur 1. Ce bloc potentiométrique 19 soit fait partie de l'un des circuits imprimés du téléviseur, soit est fixé sur un de ces circuits. L'une des extrémités du câble 5 est reliée au transformateur, l'autre extrémité du câble 5 est reliée à ce bloc, avantageusement par un dispositif de connexion à pastille conductrice similaire à celui équipant la cheminée 7. Les câbles 22 et 23 peuvent être fixés sur le bloc 19 de façon permanente ou amovible, et dans ce dernier cas, on peut également utiliser un dispositif d'accrochage rapide et des pastilles conductrices.FIG. 2 shows a simplified
On a représenté, de façon simplifiée, sur la figure 3, un mode de réalisation pour lequel le bloc potentiométrique 24, avec ses potentiomètres 25, 26 est fixé sur l'une des faces du transformateur par clipsage (bloc 24 représenté en traits continus pour une première solution, et en traits interrompus pour deux autres possibilités). Les câbles de liaison 27 et 28 aux grilles G2 et G3 du tube cathodique peuvent être fixés sur le bloc 24 de façon permanente ou amovible, dans ce dernier cas, à l'aide de pastilles conductrices également.There is shown, in a simplified manner, in FIG. 3, an embodiment for which the
La fixation amovible du câble très haute tension 6, avec sa ventouse 6A, dans la cheminée 8 est similaire à celle du câble 5 dans la cheminée 7, et ne sera pas décrite plus en détail.The removable fixing of the very
Grâce à l'invention, on peut disposer le transformateur haute tension sur son circuit imprimé dans la position pour laquelle l'influence de son rayonnement sur son environnement est la moindre, et on peut positionner le bloc potentiométrique là où il est aisé d'effectuer les réglages de ses potentiomètres.Thanks to the invention, the high voltage transformer can be placed on its printed circuit in the position for which the influence of its radiation on its environment is the least, and the potentiometric block can be positioned where it is easy to carry out the settings of its potentiometers.
Un autre avantage de l'invention est de permettre de dissocier le transformateur du bloc potentiométrique et des câbles correspondant, ce qui simplifie les réparations lors d'une défaillance de l'un des éléments.Another advantage of the invention is that it makes it possible to dissociate the transformer from the potentiometric block and the corresponding cables, which simplifies repairs in the event of a failure of one of the elements.
Enfin, le fabricant de transformateurs n'a plus à s'occuper des câbles encombrants, et l'utilisateur peut mettre en place les éléments du circuit haute tension en fin de fabrication.Finally, the transformer manufacturer no longer has to deal with bulky cables, and the user can install the elements of the high-voltage circuit at the end of manufacturing.
Claims (11)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8518521 | 1985-12-13 | ||
FR8518521A FR2591794B1 (en) | 1985-12-13 | 1985-12-13 | HIGH VOLTAGE TRANSFORMER WITHOUT HIGH VOLTAGE OUTPUT CABLES AND WITH REMOVABLE POTENTIOMETRIC BLOCK, PARTICULARLY FOR A TRICHROME CATHODE RAY TUBE |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0236642A1 EP0236642A1 (en) | 1987-09-16 |
EP0236642B1 true EP0236642B1 (en) | 1993-06-16 |
EP0236642B2 EP0236642B2 (en) | 1998-01-21 |
Family
ID=9325780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86402729A Expired - Lifetime EP0236642B2 (en) | 1985-12-13 | 1986-12-09 | High-voltage transformer |
Country Status (8)
Country | Link |
---|---|
US (1) | US4810899A (en) |
EP (1) | EP0236642B2 (en) |
JP (1) | JPH0754775B2 (en) |
DE (1) | DE3688596T3 (en) |
ES (1) | ES2041244T5 (en) |
FR (1) | FR2591794B1 (en) |
HK (1) | HK26195A (en) |
WO (1) | WO1987003737A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3800477A1 (en) * | 1988-01-11 | 1989-07-20 | Graetz Nokia Gmbh | HIGH VOLTAGE TRANSFORMER FOR TELEVISIONS |
DE4105076C2 (en) * | 1991-02-19 | 1993-10-21 | Phoenix Elekt | Electrical connection terminal |
DE9214928U1 (en) * | 1992-11-03 | 1992-12-17 | Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth | Diode split line transformer |
US5289977A (en) * | 1993-01-06 | 1994-03-01 | Graco Inc. | Electrostatic spray gun power supply connection |
DE4412291A1 (en) * | 1994-04-09 | 1995-10-12 | Nokia Deutschland Gmbh | Strain relief |
FR2729254A1 (en) * | 1995-01-05 | 1996-07-12 | Thomson Television Components | METHOD FOR MANUFACTURING A CONNECTOR FOR AN ELECTRIC CABLE, ELECTRIC CABLE AND HIGH VOLTAGE TRANSFORMER EQUIPPED WITH SUCH CABLES |
CN103247953B (en) * | 2013-05-22 | 2016-06-15 | 国家电网公司 | Special tool for sleeve lead-out line |
CN107408798B (en) * | 2015-05-26 | 2019-05-28 | 三菱电机株式会社 | The manufacturing method of electrical equipment and electrical equipment |
CN109887727B (en) * | 2019-03-31 | 2020-11-03 | 江苏环东电气有限公司 | Experimental miniature transformer with winding joint control auxiliary connection |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2003176A (en) * | 1933-08-12 | 1935-05-28 | Gen Electric | Electric heater |
US2379942A (en) * | 1942-12-31 | 1945-07-10 | Bell Telephone Labor Inc | Cable terminating means |
US2420118A (en) * | 1943-11-01 | 1947-05-06 | Titeflex Inc | Connecting means for shielded ignition leads |
US2596420A (en) * | 1950-08-10 | 1952-05-13 | Victor A Wicks | Rheostatic switch |
FR71570E (en) * | 1957-06-20 | 1960-01-05 | Improvements in the assembly of electrical parts | |
US2934668A (en) * | 1959-01-16 | 1960-04-26 | Gerald J Dall | Spark plug |
US3084210A (en) * | 1960-03-28 | 1963-04-02 | Emerson Electric Mfg Co | Connection for submersible motors |
US3344391A (en) * | 1964-02-14 | 1967-09-26 | Elastic Stop Nut Corp | Waterproof electrical connections |
NL149955B (en) * | 1965-11-04 | 1976-06-15 | Nkf Kabel Bv | CONNECTION OF THE WIRES OF TWO ONE-WIRED HIGH-VOLTAGE CABLES OR THE WIRES OF TWO MULTI-WIRED HIGH-VOLTAGE CABLES, THAT ARE SEPARATELY CONNECTED AND SURROUNDED BY A HIGH-VOLTAGE SLEEVE OF CONDUCTIVE MATERIAL. |
US3550203A (en) * | 1969-01-21 | 1970-12-29 | Jerome H Lemelson | Apparatus for electrical cable |
JPS5126617Y2 (en) * | 1971-07-22 | 1976-07-06 | ||
US3784729A (en) * | 1971-08-23 | 1974-01-08 | Chance Co | Electrical cable connector |
GB1437825A (en) * | 1973-01-15 | 1976-06-03 | Bunker Ramo | Socket contact with conductive elastomer contacint surface |
US3947959A (en) * | 1973-12-03 | 1976-04-06 | Essex International, Inc. | Method of making an electrical connector |
JPS5812555Y2 (en) * | 1977-09-27 | 1983-03-10 | 電気音響株式会社 | flyback transformer |
JPS5818320B2 (en) * | 1978-04-05 | 1983-04-12 | 株式会社日立製作所 | hoisting device |
JPS636463Y2 (en) * | 1979-07-28 | 1988-02-23 | ||
JPS6052606B2 (en) * | 1979-12-25 | 1985-11-20 | 富士通株式会社 | microwave field effect transistor circuit |
JPS608412Y2 (en) * | 1980-03-12 | 1985-03-25 | 三洋電機株式会社 | flyback transformer |
DE3041254A1 (en) * | 1980-11-03 | 1982-06-03 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Line transformer for TV receiver - has shielded HV connection as integral part of casing |
CA1188819A (en) * | 1981-06-30 | 1985-06-11 | Sanyo Electric Co., Ltd. | Flyback transformer |
FR2551259B1 (en) * | 1983-08-25 | 1985-11-08 | Siemens Sa | HIGH VOLTAGE TRANSFORMER |
DE3471195D1 (en) * | 1983-11-07 | 1988-06-16 | Radiotech Ind Commerc Sa | Voltage control device for cathode-ray tube electrodes |
JPS60210167A (en) * | 1984-03-31 | 1985-10-22 | Matsushita Electric Ind Co Ltd | Flyback transformer |
-
1985
- 1985-12-13 FR FR8518521A patent/FR2591794B1/en not_active Expired
-
1986
- 1986-12-09 DE DE3688596T patent/DE3688596T3/en not_active Expired - Fee Related
- 1986-12-09 WO PCT/FR1986/000427 patent/WO1987003737A1/en unknown
- 1986-12-09 EP EP86402729A patent/EP0236642B2/en not_active Expired - Lifetime
- 1986-12-09 ES ES86402729T patent/ES2041244T5/en not_active Expired - Lifetime
- 1986-12-09 US US07/083,855 patent/US4810899A/en not_active Expired - Lifetime
- 1986-12-09 JP JP62500134A patent/JPH0754775B2/en not_active Expired - Lifetime
-
1995
- 1995-03-02 HK HK26195A patent/HK26195A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO1987003737A1 (en) | 1987-06-18 |
FR2591794B1 (en) | 1989-01-13 |
EP0236642B2 (en) | 1998-01-21 |
HK26195A (en) | 1995-03-10 |
JPS63502234A (en) | 1988-08-25 |
EP0236642A1 (en) | 1987-09-16 |
JPH0754775B2 (en) | 1995-06-07 |
ES2041244T3 (en) | 1993-11-16 |
FR2591794A1 (en) | 1987-06-19 |
US4810899A (en) | 1989-03-07 |
DE3688596T2 (en) | 1993-12-02 |
ES2041244T5 (en) | 1998-04-01 |
DE3688596D1 (en) | 1993-07-22 |
DE3688596T3 (en) | 1998-08-06 |
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