EP0096449B1 - Einrichtung zur Hochspannungsübertragung zwischen zwei relativ zueinander drehbaren Teilen - Google Patents

Einrichtung zur Hochspannungsübertragung zwischen zwei relativ zueinander drehbaren Teilen Download PDF

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Publication number
EP0096449B1
EP0096449B1 EP83200822A EP83200822A EP0096449B1 EP 0096449 B1 EP0096449 B1 EP 0096449B1 EP 83200822 A EP83200822 A EP 83200822A EP 83200822 A EP83200822 A EP 83200822A EP 0096449 B1 EP0096449 B1 EP 0096449B1
Authority
EP
European Patent Office
Prior art keywords
electrode
electrode arrangement
arrangements
arrangement
insulator body
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
EP83200822A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0096449A1 (de
Inventor
Friedrich-Karl Beckmann
Thomas Helzel
Horst Peemöller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0096449A1 publication Critical patent/EP0096449A1/de
Application granted granted Critical
Publication of EP0096449B1 publication Critical patent/EP0096449B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/64—Devices for uninterrupted current collection
    • H01R39/643—Devices for uninterrupted current collection through ball or roller bearing

Definitions

  • the invention relates to a device for high-voltage transmission between two parts which can be rotated relative to one another and each comprise an insulator body, at least one of which has an electrode arrangement which leads the high voltage and is concentric with the axis of rotation and which is in electrical connection with contact elements.
  • a device is required in particular for high-voltage transmission for computed tomography x-ray devices.
  • the rotating part carries an electrode track which is concentric with the axis of rotation and on which slide contact elements which are connected to the fixed part and are connected to the high-voltage generator.
  • the rotor and the stator are provided with interlocking ribs which are concentric with the axis of rotation.
  • the field distribution in the region of the electrode track is very inhomogeneous, the maximum occurring directly on the surface of the electrode track, which is at least partially in contact with air. As a result, the air can be ionized, which in turn can damage the insulator bodies.
  • the object of the present invention is to design an arrangement of the type mentioned at the outset such that the field distribution in the space between the rotor and the stator is more homogeneous and the field strength is reduced there.
  • this object is achieved according to the invention in that an electrode arrangement which surrounds the axis of rotation and is concentric with it is also provided on the other insulator body.
  • a more homogeneous field distribution results between the two concentric electrode arrangements and in their surroundings, because both have the same potential during operation.
  • the electrode arrangements could be flat and lie in parallel planes.
  • the electrical field strength in the area lying between the two electrodes is significantly reduced by the fact that the outer cross section of at least one of the two electrode arrangements corresponds to a U open to the other electrode arrangement, the legs of which end at a short distance from the other electrode arrangement, so that the mutually facing surfaces of the two electrodes define an annular cavity.
  • the two electrode arrangements form a Faraday cage for the annular cavity located between them, which is thus largely free of electrical fields.
  • the contact elements used in this cavity can therefore have any shape. The function of the device is practically not endangered by the abrasion of the contact elements.
  • the electric field strength can also be relatively large on the outer surface of the electrode arrangement, the electrode arrangement is embedded in the insulator body in this area, the dielectric strength of which is considerably higher than that of air.
  • the cross section of the insulator bodies on both sides of the legs has sections parallel to the line of symmetry between the electrode arrangements, which pass into beveled sections on which the distance from the other insulator body is greater than on the end face. This configuration reduces the field strength in the cavity between the two insulator bodies to such an extent that ionization of the air cannot occur.
  • the device for high-voltage transmission has the shape of a closed ring, which consists of two ring-shaped rotatable relative to one another Parts 1 and 2, which are arranged concentrically to the axis of rotation 3.
  • the annular part 2 is enclosed by the annular part 1.
  • Part 1 can be the stator and part 2 the rotor; however, the functions can also be interchanged.
  • both parts 1 and 2 each comprise an insulator body 11 or 21, which - with the exception of the surface facing the other part - is surrounded on all sides by an earthed metal housing 12 or 22.
  • the cross section of the annular insulating body has on the non-metal surface on the outside sections 13 and 23, which run vertically and parallel, and central sections 14 and 24, which also run vertically and parallel, but have a much smaller distance from each other than sections 13 and 23. Between sections 13 and 14 and 23 and 24, sections 15 and 25, respectively, run at an angle of inclination on the order of 21 ".
  • Annular electrode arrangements with an approximately U-shaped cross section are embedded in the two insulator bodies 11 and 21 in the region of the sections 14 and 24.
  • Each of the two electrode arrangements consists of a metallic shield 16, 26 with a U-shaped cross-section, which determines the outer contours of the electrode arrangement, and each has an annular electrode track 17 or 27, via which the essential part of the current flows between the two rotatable parts in the operating state.
  • the electrode tracks 17 and 27 are connected to a high-voltage generator or a high-voltage consumer via high-voltage lines (not shown in more detail) which are led through the insulator body 12 or 22 (the grounded shield 12 'or 22 must be interrupted in this area) (e.g. an x-ray tube).
  • a roller 4 is provided as the contact element, which runs on the electrode tracks 17 and 27 and makes electrical contact between the two tracks.
  • the cross sections are symmetrical; the line of symmetry is designated 5.
  • the U-shaped cross sections of the shields 16 and 26 of the two electrode arrangements are open to one another and their legs end at a short distance, for. B. 1-2 mm, from each other.
  • arbitrarily shaped transmission elements can be used for high-voltage transmission, u. a. also contact brushes (in this case one of the two electrode tracks can be omitted because the contact brush is connected directly to the associated high-voltage line).
  • the abrasion occurring on the contact element 4 or on the electrode arrangements during operation is practically enclosed in the space between the two electrode arrangements. Since the electrical field there is very low, it does not impair the high-voltage strength of the device.
  • the highest field strengths occur in the area of the edges of the electrode arrangements, in which the vertical surfaces of the electrode arrangement meet with their horizontal surfaces.
  • the high field strengths however, only occur on the outer surfaces, which are surrounded on all sides by the insulator body, which can be made of epoxy resin, for example, and which has a substantially higher dielectric strength than air. Although these field strengths could be reduced if the two shields 16 and 26 of the electrode arrangements had a semicircular cross section, this is not necessary because the dielectric strength of the insulator body material is sufficiently high.
  • the shape of the insulator bodies 11 and 21 (closely adjacent 5 mm long parallel sections 14 and 24 with a distance of approximately 1 mm; beveled sections 15, 25 with an inclination angle of approximately 21 °) also results in operation at one High voltage of 100 kV reaches such a potential distribution that the electrical field strength in the air space between the insulator bodies is nowhere sufficient to ionize the air.
  • the electric field strength in the air space between the insulators increases outwards, i.e. H. in Fig. 2 up and down, down and disappears almost completely at the externally accessible areas of the high-voltage transmission device.
  • a high-voltage consumer is not connected to ground on one side, but is operated between positive and negative high-voltage potential.
  • Two high-voltage transmission devices of the type shown in FIGS. 1 and 2 are required for the transmission of two high-voltage potentials.
  • the axis of rotation 3 (cf. Fig. 1) either next to each other (one above the other in Fig. 2) or concentrically to each other (ie next to each other in Fig. 2).
  • the cathode potentials differ only very slightly from one another, a single device according to FIG. 2 is sufficient to transmit the different cathode potentials if, within the shield 16 or 26, the dimensions of which must then be increased in the vertical direction, a plurality of electrode tracks in the vertical direction relative to one another offset and arranged electrically isolated from each other.
  • the axis of rotation of the arrangement shown in Fig. 2 is vertical and at a distance from the high-voltage transmission device.
  • One annular electrode arrangement eg 26, 27
  • the other electrode arrangement 16 17 is then enclosed by the other electrode arrangement 16, 17.
  • the device described if the parts 1, 2 are rotated about a horizontal axis of rotation above or below the device.
  • the electrode arrangements are then arranged parallel to one another with respect to the axis of rotation.
  • the structure shown in FIG. 2 would have to be changed such that one of the two grounded shields 12 or 22 concentrically surrounds the other.
  • the axis of rotation can assume any inclination in the plane of the drawing relative to the cross section shown in FIG. 2, with a modification of the shape of the grounded shields 12 or 22 being necessary.

Landscapes

  • X-Ray Techniques (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
EP83200822A 1982-06-09 1983-06-07 Einrichtung zur Hochspannungsübertragung zwischen zwei relativ zueinander drehbaren Teilen Expired EP0096449B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3221791 1982-06-09
DE19823221791 DE3221791A1 (de) 1982-06-09 1982-06-09 Einrichtung zur hochspannungsuebertragung zwischen zwei relativ zu einander drehbaren teilen

Publications (2)

Publication Number Publication Date
EP0096449A1 EP0096449A1 (de) 1983-12-21
EP0096449B1 true EP0096449B1 (de) 1985-09-11

Family

ID=6165725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200822A Expired EP0096449B1 (de) 1982-06-09 1983-06-07 Einrichtung zur Hochspannungsübertragung zwischen zwei relativ zueinander drehbaren Teilen

Country Status (4)

Country Link
US (1) US4496202A (OSRAM)
EP (1) EP0096449B1 (OSRAM)
JP (1) JPS5912584A (OSRAM)
DE (2) DE3221791A1 (OSRAM)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4975062A (en) * 1989-05-19 1990-12-04 Motorola, Inc. Hermaphroditic connector
US7868723B2 (en) * 2003-02-26 2011-01-11 Analogic Corporation Power coupling device
US9368272B2 (en) 2003-02-26 2016-06-14 Analogic Corporation Shielded power coupling device
US8350655B2 (en) * 2003-02-26 2013-01-08 Analogic Corporation Shielded power coupling device
US9490063B2 (en) 2003-02-26 2016-11-08 Analogic Corporation Shielded power coupling device
DE102006009227A1 (de) * 2006-02-28 2007-09-06 Siemens Ag Computertomograph
CN112987076B (zh) * 2021-02-07 2022-08-16 中国科学院近代物理研究所 一种用于微弱束流的流强探测系统
DE102023126717B3 (de) 2023-09-29 2025-01-30 Stemmann-Technik Gmbh Schleifringübertragersystem

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123421A (en) * 1964-03-03 Rotatable electrical connection
US2667578A (en) * 1950-01-31 1954-01-26 Hughes Tool Co Swivel joint for coaxial transmission lines
DE1263132B (de) * 1967-05-22 1968-03-14 Licentia Gmbh Schleifkontakt fuer die Gelenkverbindung zweier Stromleiter, insbesondere fuer Scherentrennschalter
FR2157179A5 (OSRAM) * 1971-10-20 1973-06-01 Egic
US3912352A (en) * 1973-04-09 1975-10-14 Joseph D Kinnear Rotary electrical coupling
CA1129564A (en) * 1979-09-17 1982-08-10 Anthony Palermo Computer tomography method and apparatus
US4335927A (en) * 1980-03-20 1982-06-22 Sperry Corporation Multi-circuit rotary electrical conductor assembly
DE3010819A1 (de) * 1980-03-20 1981-09-24 Siemens AG, 1000 Berlin und 8000 München Roentgenschichtgeraet zur herstellung von transversalschichtbildern
US4329004A (en) * 1980-05-12 1982-05-11 Litton Systems, Inc. Gas filled high voltage slip ring assembly

Also Published As

Publication number Publication date
JPS5912584A (ja) 1984-01-23
DE3221791A1 (de) 1983-12-15
US4496202A (en) 1985-01-29
EP0096449A1 (de) 1983-12-21
JPH0318316B2 (OSRAM) 1991-03-12
DE3360785D1 (en) 1985-10-17

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