EP0043316B1 - Process for the transmission of electric power between parts rotating at a low speed, and device for the use of said process - Google Patents

Process for the transmission of electric power between parts rotating at a low speed, and device for the use of said process Download PDF

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Publication number
EP0043316B1
EP0043316B1 EP19810401006 EP81401006A EP0043316B1 EP 0043316 B1 EP0043316 B1 EP 0043316B1 EP 19810401006 EP19810401006 EP 19810401006 EP 81401006 A EP81401006 A EP 81401006A EP 0043316 B1 EP0043316 B1 EP 0043316B1
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EP
European Patent Office
Prior art keywords
fixed
turning part
turning
flexible electrical
electrical connection
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
Application number
EP19810401006
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German (de)
French (fr)
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EP0043316A1 (en
Inventor
Jean-Claude Le Stang
Georges Thomin
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Centre National dEtudes Spatiales CNES
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Centre National dEtudes Spatiales CNES
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Publication of EP0043316A1 publication Critical patent/EP0043316A1/en
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Publication of EP0043316B1 publication Critical patent/EP0043316B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R35/00—Flexible or turnable line connectors, i.e. the rotation angle being limited

Definitions

  • the invention relates to a method of transmitting electrical power between parts rotating at low speed and, in particular, between a fixed part and a rotating part and a device for implementing said method.
  • the aim of the method and the device according to the invention is to overcome the above-mentioned drawbacks by eliminating the connection by sliding contacts in a manner different from that disclosed in document FR-A-2 249 458.
  • the device according to the invention makes it possible, among other things, to increase the quality of the shots in Earth observation satellites, and in telecommunications or direct television satellites to increase the transmitted power.
  • the method of transmitting electrical power between a fixed part and a rotating part consists in making a flexible electrical connection between these two parts and then in interrupting this connection when the rotating part has moved by a determined angle relative to the fixed part. .
  • the electrical connection is then moved so as to cancel the torsion which it has undergone due to the rotation of the rotating part, then the connection between the fixed part and the rotating part is re-established for a new rotation.
  • a flexible electrical connection is made between the rotating part and a mobile intermediate part.
  • the intermediate part is mechanically and electrically coupled with the fixed part.
  • the rotating part has moved by a determined angle with respect to the fixed part, the intermediate part is decoupled from the fixed part and the intermediate part is rotated in the direction of rotation of the rotating part by an equal angle at the determined angle.
  • the single figure partially shows in section an embodiment of a transmission device for implementing the method and its variant described above.
  • This revolution device is placed between the body of the satellite (not shown) and the support for solar panels represented by the flange 1.
  • the outer casing 2 as well as the lower part 3 which is housed in the satellite, are fixed.
  • the casing 2 carries the motor means 4 driving the rotating part or rotor of panels 5 held in the ball bearings 6.
  • the cables 7 coming from the cell panels are connected to a part or connection ring 8A which is a rotating part of the device .
  • This ring is connected by a flexible electrical connection 9 to a second ring 8B secured to the intermediate part 10 which is capable of rotating relative to the fixed part 11.
  • the electrical connection can be formed of several flexible twisted conductors fixed regularly between the two rings.
  • the intermediate part is mounted on ball bearings 12 and carries a crown 13 having at least one peripheral orifice 14 intended to receive a pin 15 mounted at the end of the movable core 16 of an electromagnet 17 fixed on the fixed part .
  • the crown and the electromagnet constitute clutch means between the intermediate part and the fixed part.
  • electrical switch means constituted by electrical contacts 18 disposed at the periphery of the cooperating intermediate part, when the intermediate part and the fixed part are coupled by the clutch, with contacts 19 carried by the mobile armatures of electromagnetic relays 20 placed on the inner periphery of the fixed part.
  • the relay contacts are connected to a distribution socket 21.
  • a drive device 22 is provided between the rotating and intermediate parts.
  • this device consists of an elastic member, arranged along the axis of the rotating and intermediate parts. It is formed, for example, of a filiform torsion element or a ribbon.
  • the elastic member is constituted by the flexible connection 9 itself.
  • At least one of the ends of the torsion element (when the latter is present in the form of a wire or a ribbon) and one of the ends of the flexible connection are fixed to means capable of elastic elongation, for example membranes with axial deformation 23 and 24.
  • the angular displacement of the rotating part with respect to the fixed part is defined by a position detector 25 placed between the two parts and constituted, for example, by a magnetic field variation detector. This detector acts on the contact opening control means between the intermediate part and the fixed part as well as on the clutch means.
  • the transmission of energy by the device described above will necessarily include an interruption when the rotating part has made approximately one revolution relative to the fixed part. If this interruption is unacceptable, it will be possible to provide two intermediate parts, each rotating by a half-turn, the angle take-up operations of one of the parts being carried out when the other part is in service. The relay contacts of each of the parts are then mounted in parallel.
  • the device with two intermediate parts allows, by mounting the relays in series-parallel, a certain redundancy in the event of failure of one of the devices.
  • the energy transmission method and the device for its implementation by eliminating sliding contacts, bring an increase in the life of the contacts, an increase in the transmitted power and a reduction in the disturbing torques induced by friction during the use of sliding contacts.
  • the reaction torque of the flexible electrical connection and of the drive device is low and reproducible, which has the consequence of reducing the disturbing effects on the satellite and of increasing certain performances, such as, for example: the quality of grip. of view on geostationary satellites.

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  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Mechanical Operated Clutches (AREA)
  • Mechanisms For Operating Contacts (AREA)

Description

L'invention concerne un procédé de transmission de puissance électrique entre parties tournant à faible vitesse et, en particulier, entre une partie fixe et une partie tournante et un dispositif pour la mise en oeuvre dudit procédé.The invention relates to a method of transmitting electrical power between parts rotating at low speed and, in particular, between a fixed part and a rotating part and a device for implementing said method.

La transmission de puissance électrique entre une partie tournant à faible vitesse et l'autre fixe, nécessite en général le recours à des contacts glissants. C'est notamment le cas pour les satellites à générateur solaire orientable. Se référer, par exemple, au document FR-A 2 187 048.The transmission of electrical power between a part rotating at low speed and the other stationary, generally requires the use of sliding contacts. This is particularly the case for satellites with orientable solar generator. Refer, for example, to document FR-A 2 187 048.

De tels contacts glissants entraînent de nombreux inconvénients tels que: usure des contacts, évolution du couple résistant, bruit électrique, dissipation par effet Joule dans les contacts. Ces inconvénients sont très nettement amplifiés dans le cas d'un fonctionnement en ultra vide.Such sliding contacts cause numerous drawbacks such as: wear of the contacts, evolution of the resistive torque, electrical noise, dissipation by Joule effect in the contacts. These drawbacks are very clearly amplified in the case of ultra-vacuum operation.

Le procédé et le dispositif, selon l'invention, ont pour but de pallier aux inconvénients ci-dessus énoncés en supprimant la liaison par contacts glissants dans une manière différente de cette divulguée dans le document FR-A-2 249 458.The aim of the method and the device according to the invention is to overcome the above-mentioned drawbacks by eliminating the connection by sliding contacts in a manner different from that disclosed in document FR-A-2 249 458.

Le dispositif selon l'invention permet, entre autres, d'augmenter la qualité des prises de vue dans les satellites d'observation de la Terre, et dans les satellites de télécommunications ou de télévision directe d'augmenter la puissance transmise.The device according to the invention makes it possible, among other things, to increase the quality of the shots in Earth observation satellites, and in telecommunications or direct television satellites to increase the transmitted power.

Les explications et la figure données ci-après à titre d'exemple, permettront de comprendre comment l'invention peut être réalisée.The explanations and the figure given below by way of example will make it possible to understand how the invention can be implemented.

Le procédé de transmission de puissance électrique entre une partie fixe et une partie tournante consiste à réaliser une liaison électrique souple entre ces deux parties puis à interrompre cette liaison lorsque la partie tournante s'est déplacée d'un angle déterminé par rapport à la partie fixe. On déplace alors la liaison électrique de manière à annuler la torsion qu'elle a subie du fait de la rotation de la partie tournante, puis on rétablit la liaison entre la partie fixe et la partie tournante pour une nouvelle rotation.The method of transmitting electrical power between a fixed part and a rotating part consists in making a flexible electrical connection between these two parts and then in interrupting this connection when the rotating part has moved by a determined angle relative to the fixed part. . The electrical connection is then moved so as to cancel the torsion which it has undergone due to the rotation of the rotating part, then the connection between the fixed part and the rotating part is re-established for a new rotation.

Selon une variante du procédé, on réalise une liaison électrique souple entre le partie tournante et une partie intermédiaire mobile. On couple mécaniquement et électriquement la partie intermédiaire avec la partie fixe. Lorsque la partie tournante s'est déplacée d'un angle déterminé par rapport à la partie fixe, on désaccouple la partie intermédiaire de la partie fixe et on fait tourner la partie intermédiaire dans le sens de rotation de la partie tournante d'un angle égal à l'angle déterminé. On couple alors les parties intermédiaires et fixe pour une nouvelle rotation.According to a variant of the method, a flexible electrical connection is made between the rotating part and a mobile intermediate part. The intermediate part is mechanically and electrically coupled with the fixed part. When the rotating part has moved by a determined angle with respect to the fixed part, the intermediate part is decoupled from the fixed part and the intermediate part is rotated in the direction of rotation of the rotating part by an equal angle at the determined angle. We then couple the intermediate and fixed parts for a new rotation.

La figure unique montre partiellement en coupe une forme de réalisation d'un dispositif de transmission pour la mise en oeuvre du procédé et de sa variante ci-dessus décrits.The single figure partially shows in section an embodiment of a transmission device for implementing the method and its variant described above.

Ce dispositif de révolution est placé entre le corps du satellite (non représenté) et le support de panneaux solaires représenté par la bride 1. Le carter extérieur 2 ainsi que la partie inférieure 3 qui est logée dans le satellite, sont fixes. Le carter 2 porte les moyens moteurs 4 entraînant la partie tournante ou rotor de panneaux 5 maintenus dans les roulements à billes 6. Les câbles 7 provenant des panneaux de cellules sont connectés à une pièce ou bague de connexion 8A qui est une partie tournante du dispositif. Cette bague est reliée par une liaison électrique souple 9 à une deuxième bague 8B solidaire de la partie intermédiaire 10 qui est susceptible de tourner par rapport à la partie fixe 11. La liaison électrique peut être formée de plusieurs conducteurs souples torsadés fixés régulièrement entre les deux bagues. La partie intermédiaire est montée sur des roulements à billes 12 et porte une couronne 13 présentant au moins un orifice périphérique 14 prévu pour recevoir une broche 15 montée à l'extrémité du noyau mobile 16 d'un électro-aimant 17 fixé sur la partie fixe. La couronne et l'électro-aimant constituent des moyens d'embrayage entre la partie intermédiaire et la partie fixe. Entre la partie intermédiaire et la partie fixe sont également prévus des moyens interrupteurs électriques constitués par des contacts électriques 18 disposés à la périphérie de la partie intermédiaire coopérant, lorsque la partie intermédiaire et la partie fixe sont couplées par l'embrayage, avec des contacts 19 portés par les armatures mobiles de relais électromagnétiques 20 placés à la périphérie intérieure de la partie fixe.This revolution device is placed between the body of the satellite (not shown) and the support for solar panels represented by the flange 1. The outer casing 2 as well as the lower part 3 which is housed in the satellite, are fixed. The casing 2 carries the motor means 4 driving the rotating part or rotor of panels 5 held in the ball bearings 6. The cables 7 coming from the cell panels are connected to a part or connection ring 8A which is a rotating part of the device . This ring is connected by a flexible electrical connection 9 to a second ring 8B secured to the intermediate part 10 which is capable of rotating relative to the fixed part 11. The electrical connection can be formed of several flexible twisted conductors fixed regularly between the two rings. The intermediate part is mounted on ball bearings 12 and carries a crown 13 having at least one peripheral orifice 14 intended to receive a pin 15 mounted at the end of the movable core 16 of an electromagnet 17 fixed on the fixed part . The crown and the electromagnet constitute clutch means between the intermediate part and the fixed part. Between the intermediate part and the fixed part are also provided electrical switch means constituted by electrical contacts 18 disposed at the periphery of the cooperating intermediate part, when the intermediate part and the fixed part are coupled by the clutch, with contacts 19 carried by the mobile armatures of electromagnetic relays 20 placed on the inner periphery of the fixed part.

Les contacts des relais sont connectés à une prise de distribution 21.The relay contacts are connected to a distribution socket 21.

Afin d'annuler la torsion de la liaison électrique souple, il est prévu un dispositif d'entraînement 22 entre les parties tournante et intermédiaire. Selon l'exemple de réalisation montré, ce dispositif est constitué d'un organe élastique, disposé selon l'axe des parties tournante et intermédiaire. Il est formé, par exemple, d'un élément de torsion filiforme ou d'un ruban.In order to cancel the torsion of the flexible electrical connection, a drive device 22 is provided between the rotating and intermediate parts. According to the embodiment shown, this device consists of an elastic member, arranged along the axis of the rotating and intermediate parts. It is formed, for example, of a filiform torsion element or a ribbon.

Selon une autre forme de réalisation, l'organe élastique est constitué par la liaison souple 9 elle-même.According to another embodiment, the elastic member is constituted by the flexible connection 9 itself.

Afin de permettre le déplacement angulaire relatif entre la pièce tournante et la pièce intermédiaire, sans que se produisent des forces axiales de traction trop importantes entre lesdites deux pièces, au moins une des extrémités de l'élément de torsion (lorsque celui-ci se présente sous la forme d'un fil ou d'un ruban) et une des extrémités de la liaison souple sont fixées à des moyens susceptibles d'un allongement élastique, par exemple des membranes à déformation axiale 23 et 24.In order to allow relative angular displacement between the rotating part and the intermediate part, without excessive axial tensile forces occurring between said two parts, at least one of the ends of the torsion element (when the latter is present in the form of a wire or a ribbon) and one of the ends of the flexible connection are fixed to means capable of elastic elongation, for example membranes with axial deformation 23 and 24.

Le déplacement angulaire de la partie tournante par rapport à la partie fixe est défini par un détecteur de position 25 disposé entre les deux parties et constitué, par exemple, par un détecteur de variation de champ magnétique. Ce détecteur agit sur les moyens de commande d'ouverture des contacts entre la partie intermédiaire et la partie fixe ainsi que sur les moyens d'embrayage.The angular displacement of the rotating part with respect to the fixed part is defined by a position detector 25 placed between the two parts and constituted, for example, by a magnetic field variation detector. This detector acts on the contact opening control means between the intermediate part and the fixed part as well as on the clutch means.

Le dispositif de transmission de puissance électrique selon l'invention présente donc la disposition suivante:

  • La partie tournante 5 est placée à l'intérieur et coaxialement à la partie fixe 3 dans laquelle est fixée une partie des moyens d'entraînement 4 de la partie tournante. A l'intérieur et coaxialement à la partie tournante, l'organe élastique 22 et la liaison électrique souple 9 sont disposés respectivement selon l'axe et près de l'axe. Une extrémité au moins de la liaison souple et de l'organe élastique est fixée à une membrane à déformation axiale 23, 24 supportée par la partie intermédiaire coaxiale et en partie située à l'intérieur d'une zone de la partie fixe, ladite zone portant les bobines de relais 20 et les contacts mobiles 19 ainsi qu'une partie des moyens d'embrayage constituée par la bobine de l'électro-aimant 17. Lorsque le dispositif est destiné à équiper un satellite, il est prévu des moyens de maintien 26 du centre de la partie intermédiaire.
The electric power transmission device according to the invention therefore has the following arrangement:
  • The rotating part 5 is placed inside and coaxially with the fixed part 3 in which a part of the drive means 4 of the rotating part is fixed. Inside and coaxially with the rotating part, the elastic member 22 and the flexible electrical connection 9 are arranged respectively along the axis and near the axis. At least one end of the flexible connection and of the elastic member is fixed to an axial-deformation membrane 23, 24 supported by the coaxial intermediate part and partly located inside an area of the fixed part, said area carrying the relay coils 20 and the movable contacts 19 as well as part of the clutch means constituted by the coil of the electromagnet 17. When the device is intended to equip a satellite, means are provided for holding 26 from the center of the intermediate part.

La transmission d'énergie par le dispositif ci-dessus décrit comportera obligatoirement une interruption lorsque la partie tournante aura fait approximativement un tour par rapport à la partie fixe. Si cette interruption est inacceptable, il sera possible de prévoir deux parties intermédiaires tournant chacune d'un demi-tour, les opérations de rattrapage d'angle de l'une des parties s'effectuant lorsque l'autre partie est en service. Les contacts des relais de chacune des parties sont alors montés en parallèle.The transmission of energy by the device described above will necessarily include an interruption when the rotating part has made approximately one revolution relative to the fixed part. If this interruption is unacceptable, it will be possible to provide two intermediate parts, each rotating by a half-turn, the angle take-up operations of one of the parts being carried out when the other part is in service. The relay contacts of each of the parts are then mounted in parallel.

Le dispositif à deux parties intermédiaires permet, par le montage des relais en série-parallèle, une certaine redondance en cas de défaillance de l'un des dispositifs.The device with two intermediate parts allows, by mounting the relays in series-parallel, a certain redundancy in the event of failure of one of the devices.

Le procédé de transmission d'énergie et le dispositif pour sa mise en oeuvre, en supprimant les contacts glissants, apportent une augmentation de la durée de vie des contacts, une augmentation de la puissance transmise et une réduction des couples perturbateurs induits par les frottements lors de l'utilisation de contacts glissants.The energy transmission method and the device for its implementation, by eliminating sliding contacts, bring an increase in the life of the contacts, an increase in the transmitted power and a reduction in the disturbing torques induced by friction during the use of sliding contacts.

Le couple de réaction de la liaison électrique souple et du dispositif d'entraînement est faible et reproductible, ce qui a pour conséquence de réduire les effets perturbateurs sur le satellite et d'augmenter certaines performances, telles que, par exemple: la qualité de prise de vue sur les satellites géostationnaires.The reaction torque of the flexible electrical connection and of the drive device is low and reproducible, which has the consequence of reducing the disturbing effects on the satellite and of increasing certain performances, such as, for example: the quality of grip. of view on geostationary satellites.

Il est évident que les dispositifs décrits peuvent être utilisés pour transmettre de l'énergie électrique dans un système quelconque comportant deux parties en mouvement relatif lent.It is obvious that the devices described can be used to transmit electrical energy in any system comprising two parts in slow relative movement.

Claims (13)

1. Method of transission of electric power between a fixed part (3) and a turning part (5), characterized in that a flexible electrical connection (9) is effected between the fixed part (3) and the turning part (5), the connection is interrupted when the turning part (5) has been displaced by a certain angle with respect to the fixed part (3), the electrical connection (9) is displaced so as to cancel the twist which it has undergone because of the rotation of the turning part (5), and the connection between the fixed part (3) and the turning part (5) is reestablished for anothar rotation.
2. Method according to claim 1, characterized in that a flexible electrical connection (9) is effect between the turning part (5) and a movable intermediate part (10), the intermediate part (10) is coupled mechanically and electrically to the fixed part (3), the intermediate part (10) is uncoupled when the turning part (5) has been displaced by a certain angle with respect to the fixed part (3), the intermediate part (10) is made to turn in the direction of rotation of the turning part (5), by an angle equal to the certain angle, and the intermediate (10) and fixed (3) parts are coupled mechanically and electrically for another rotation.
3. Method according to claim 2, characterized in that a flexible electrical connection (9) is effected between the turning part (5) and two movable intermediate parts (10), and one of the intermediate parts is uncoupled when the other intermediate part is coupled.
4. Device for transmission of electric power for putting into effect the method according to one of the claims 1 to 3, characterized in that the device comprises at least one movable intermediate part (10), a flexible electrical conductor (9) connecting the intermediate part to the turning part (5), a driving device (22) provided between the intermediate part and the turning part (5), clutching means (14 to 17) between the intermediate part and the fixed part, electrical switching means (18, 19, 20) between the intermediate and fixed parts, a position detector (25), and control means provided between the position dedector and the electrical switching means (20) and the clutching means (14,17).
5. Device according to claim 4, characterized in that the driving device consists of an elastic member (22) fixed between the turning part (5) and the intermediate part (10).
6. Device according to claim 5, characterized in that the elastic member (22) consists of at least one torsion member.
7. Device according to claim 5, characterized in that the elastic member (22) consists of the flexible electrical conductor (9).
8. Device according to claim 6 or 7, characterized in that the elastic member (22) carries at at least one end of it means capable of elastic elongation (23, 24) in the axial direction.
9. Device according to claim 4, characterized in that the flexible electrical conductor (9) carries at at least one end of it means capable of elastic elongation (23, 24) in the axial direction.
10. Device according to claim 8 or 9, characterized in that the means capable of elastic elongation (23, 24) are diaphragms for axial deformation.
11. Device according to one of the claims 4 to 10, characterized in that the electrical switching means consists of at least one electromagnetic relay (20) controlled by the position detector (25), fixed contacts (18) of the relays being carried by the intermediate part (10), corresponding moving contacts (19) and the excitation coil being carried by the fixed part (3).
12. Device according to one of the claims 4 to 11, characterized in that the clutching means (17) consist of electromagnetic means.
13. Device according to one of the claims 4 to 12, characterized in that the turning part (5) is arranged coaxially with the fixed part (2) in which are fixed one part of the driving means (4) which drive the turning part, and inside the turning part the flexible electrical connection (9) and the elastic member (22) are arranged respectively close to the axis and along the axis of the turning part (5), one end of the flexible electrical connection and of the leastic member being attached each to a diaphragm for axial deformation (23, 24) supported by the intermediate part coaxially inside a zone (3) of the fixed part (2) supporting the moving contacts (19) and the relay coils (20), a coil (17) and a movable armature (15, 17) of the clutching means.
EP19810401006 1980-06-27 1981-06-23 Process for the transmission of electric power between parts rotating at a low speed, and device for the use of said process Expired EP0043316B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8014381 1980-06-27
FR8014381A FR2485821A1 (en) 1980-06-27 1980-06-27 METHOD FOR TRANSMITTING ELECTRICAL POWER BETWEEN LOW-SPEED ROTATING PARTS AND DEVICE FOR CARRYING OUT SAID METHOD

Publications (2)

Publication Number Publication Date
EP0043316A1 EP0043316A1 (en) 1982-01-06
EP0043316B1 true EP0043316B1 (en) 1984-01-25

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EP19810401006 Expired EP0043316B1 (en) 1980-06-27 1981-06-23 Process for the transmission of electric power between parts rotating at a low speed, and device for the use of said process

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US (1) US4409493A (en)
EP (1) EP0043316B1 (en)
DE (1) DE3162022D1 (en)
FR (1) FR2485821A1 (en)

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JP4509223B2 (en) * 1996-04-16 2010-07-21 ザ、プロクター、エンド、ギャンブル、カンパニー Detergent compositions containing selected intermediate chain branched surfactants

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Publication number Priority date Publication date Assignee Title
US2671864A (en) * 1949-07-27 1954-03-09 Lip Horlogerie Electromagnetic oscillatory motor
US2933629A (en) * 1955-08-22 1960-04-19 Filigranbau Stefan Keller Oscillating electric motor
US3510670A (en) * 1968-03-15 1970-05-05 Floyd M Uhland Two coil,triple point ignition system
US3599165A (en) * 1970-03-02 1971-08-10 Litton Precision Prod Inc Rotary conductor
FR2187048A5 (en) * 1972-05-29 1974-01-11 Aerospatiale
FR2249458A1 (en) * 1973-10-24 1975-05-23 Centre Nat Etd Spatiales Connector lead take-up bobbin - gives connection between rotating body and measuring devices
US3887254A (en) * 1974-01-25 1975-06-03 Kearney National Inc Electric grounding apparatus
US4076191A (en) * 1975-04-29 1978-02-28 Rca Corporation Spacecraft component rotation means

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DE3162022D1 (en) 1984-03-01
FR2485821B1 (en) 1983-11-18
US4409493A (en) 1983-10-11
EP0043316A1 (en) 1982-01-06
FR2485821A1 (en) 1981-12-31

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