EP0676774B1 - Appareil de résistance - Google Patents

Appareil de résistance Download PDF

Info

Publication number
EP0676774B1
EP0676774B1 EP95104724A EP95104724A EP0676774B1 EP 0676774 B1 EP0676774 B1 EP 0676774B1 EP 95104724 A EP95104724 A EP 95104724A EP 95104724 A EP95104724 A EP 95104724A EP 0676774 B1 EP0676774 B1 EP 0676774B1
Authority
EP
European Patent Office
Prior art keywords
elements
insulating
meandering
insulating elements
metal strip
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
Application number
EP95104724A
Other languages
German (de)
English (en)
Other versions
EP0676774A3 (fr
EP0676774A2 (fr
Inventor
Manfred Dipl.-Ing. Liebel
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0676774A2 publication Critical patent/EP0676774A2/fr
Publication of EP0676774A3 publication Critical patent/EP0676774A3/fr
Application granted granted Critical
Publication of EP0676774B1 publication Critical patent/EP0676774B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
    • H01C3/10—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element having zig-zag or sinusoidal configuration
    • H01C3/12—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element having zig-zag or sinusoidal configuration lying in one plane

Definitions

  • the invention relates to a resistance device according to the preamble of claim 1.
  • Such a resistance device is known from DE-U-89 11 271.
  • a separate holding element is attached to the outside of each meander arch of the sheet metal strip forming the resistance element.
  • the individual meandering arches are coupled to insulating elements which are lined up on supporting bolts arranged at a distance from one another in a framework. In this way, the resistance element consisting of the sheet metal strip is held in the frame by the supporting bolts.
  • the disadvantage is the attachment of separate holding elements on the sheet metal strip. These holding elements also take up space which is lost for accommodating the sheet-metal strip forming the resistance element.
  • the invention has for its object to develop a resistance device of the generic type so that no separate holding parts are required for coupling the sheet metal strip to the insulating elements.
  • a particularly simple type of mounting results from the fact that at least one opening is provided as a holding element in the sheet metal strip in the region of each meandering arch, in each of which a projection provided on the relevant insulating element as a counter element engages. Due to the protrusions of the insulating elements engaging in the openings in the sheet metal strip, the individual sheet metal strips are held very securely.
  • the width of the openings can be adapted very precisely to the thickness of the projections, so that there is no risk of destruction for the mounting of the sheet metal strips on the insulating elements even when vibrating forces occur.
  • the mounting of the sheet metal strip forming the resistance element is further improved in that on both sides of each meandering arch an elongated hole is provided as a breakthrough in the sheet metal strip, into which a bar formed on the respective insulating element and extending in the direction of the meandering loop engages .
  • the holding elements thus extend in the longitudinal direction of the respective meandering loops, so that they can be made correspondingly longer, which results in a longer guide distance of the holder and thus a better fit.
  • the insulating elements have a hollow on one end face and an axial projection adapted to the contour of the hollow on their other end face.
  • the axial projections engage in the cavities, so that the creepage distances between the resistance band and the support bolts and the scaffolding parts are thereby considerably lengthened.
  • the secure mounting of the resistance elements also serves to ensure that the insulating elements are arranged on the support bolts in such a way that they are secured against rotation.
  • An anti-rotation device of the insulating elements can advantageously be achieved in that the cavity and the axial projection of the insulating elements have a contour which deviates from the circular shape and / or locking elements which are arranged radially eccentrically on the insulating elements and are interlocking when the insulating elements are lined up on the supporting bolts.
  • the outer insulating elements of a row of insulating elements plugged onto the supporting bolts are connected to the corresponding side parts of the scaffold so that they cannot rotate.
  • the resistance element 1 with a resistance element of a resistance device 2 is designated.
  • the resistance element 1 consists of a meandering folded sheet metal strip 3.
  • insulating elements 4 are provided, which are lined up on two support bolts 6a and 6b arranged spaced apart in a frame 5 of the resistance device 1.
  • the insulating elements 4 have an insulating body 8 provided with a push-through bore 7, on each of which a radially projecting holding arm 9 is molded. As can be seen in particular from FIGS. 3 and 4, strips 10 projecting on both sides in the axial direction of the insulating body 8 are formed on the holding arm 9 of each insulating element 4.
  • the insulating elements 4 When the insulating elements 4 are lined up on the supporting bolts 6a and 6b, there is an intermediate space 11 between the holding arms 9 of two adjacent insulating elements 4. A meandering arch 12 of the sheet-metal strip 3 is inserted into this intermediate space 11.
  • the insulating elements 4 are arranged on the spaced-apart support bolts 6a and 6b in such a way that the holding arms 9 point towards one another. In this position, the insulating elements 4 are also secured against rotation on the supporting bolts 6a and 6b.
  • the meandering arches 12 of the sheet metal strip 3 can be inserted alternately into the intermediate space 11 of the insulating elements 4 arranged on the one supporting bolt 6a and once into the intermediate space 11 of the insulating elements 4 arranged on the other supporting bolt 6b.
  • an elongated hole 14 is formed toward the two longitudinal sides of the meandering loops 13 adjoining the meandering arch 12.
  • the strips 10 formed on the holding arms 9 by two adjacent insulating elements 4 engage. This results in a positive connection in the transverse direction to the longitudinal axis of the metal strip 3 forming the meandering loop 13, through which the holding of the metal strip 3 is effected transversely to its longitudinal axis.
  • each meandering arch 12 there is a transverse web 15 connecting the sheet metal material present on both sides of the elongated holes 14.
  • This crosspiece 15 prevents the side edges of the elongated holes 14 in question from moving together as a result of thermal expansion due to current being applied to the resistance element 1 due to thermal expansion, as a result of which now the sheet metal strip 3 becomes jammed on the strip 10 in question. This then prevented the elongation of the meandering loops 13 of the sheet metal strip 3, which could lead to bulging of individual meandering loops 13 and thus to a short circuit between the meandering loops 13 in question.
  • each insulating element 4 is also provided on their one end face with blocking projections 16 arranged eccentrically on their insulating body 8. An opening 22 formed on the opposite end face of the insulating element 4 is assigned to the blocking projection 16 of each insulating element 4. Furthermore, each insulating element 4 has a cavity 17 on its one end face and an axial shoulder 18 adapted to the contour of the cavity 17 on its other face side. When the insulating elements 4 are lined up on the supporting bolts 6a and 6b, both the axial lugs 18 with the cavities 17 and the blocking lugs 16 with the openings 22 assigned to them interlock.
  • the meandering bend 12 itself serve to hold the sheet metal strip 3 on the insulating elements 4, the holding takes place via electrically active material.
  • the distance between the insulating elements 4 lined up on the supporting bolts 6a and 6b can thus be fully used for the accommodation of the sheet metal strip 3, so that resistance material can be used.
  • a higher resistance value can be achieved with the same dimensions of the resistance device, or the resistance device can be made with smaller dimensions with the same resistance value.
  • each insulating element 4 On each insulating element 4, parallel surfaces 20 are formed on both sides of the axial extension 18 by tangentially directed secant-like sections 19, which serve to receive connecting elements 21. Since each insulating element 4 is provided with these surfaces 20, a connecting element 21 can be attached as an end or center connection at any point along the insulating elements 4 lined up on the supporting bolts 6a and 6b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Details Of Resistors (AREA)
  • Insulating Bodies (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Filters And Equalizers (AREA)

Claims (8)

  1. Bloc de résistance, comportant au moins un élément (1) de résistance constitué d'un ruban (3) de tôle plié et serpentant, qui est maintenu dans la zone de ses courbes sinueuses (12) au moyen d'éléments (4) isolants, lesquels sont disposés en rangée sur un boulon (6a ; 6b) de support, caractérisé en ce que des éléments (14) de maintien, qui sont en prise par complémentarité de forme avec des éléments (10) de maintien antagonistes issus des éléments (4) isolants, de telle sorte que le ruban (3) de tôle soit maintenu aux éléments (4) isolants dans la direction transversale par rapport à son axe longitudinal, sont issus du ruban (3) de tôle dans la zone des courbes sinueuses (12).
  2. Bloc de résistance suivant la revendication 1, caractérisé en ce qu'il est prévu, comme élément de maintien dans le ruban (3) de tôle dans la zone de chaque courbe sinueuse (12), au moins une ouverture (14), dans laquelle s'engage une saillie (10) issue de l'élément isolant (4) concerné en tant qu'élément de maintien antagoniste.
  3. Bloc de résistance suivant la revendication 1 ou 2, caractérisé en ce qu'il est prévu des deux côtés de chaque courbe sinueuse (12), dans le ruban (3) de tôle, en tant qu'ouverture, un trou oblong (14) qui se raccorde directement à la courbe sinueuse (12) et dans lequel s'engage une réglette (10) issue de l'élément isolant (4) associé et s'étendant dans la direction de la boucle (13).
  4. Bloc de résistance suivant la revendication 3, caractérisé en ce qu'il est prévu, dans la zone du point de virage de chaque courbe sinueuse (12), une barrette (15) transversale reliant le matériau de tôle présent des deux côtés de l'évidement (14) du trou oblong.
  5. Bloc de résistance suivant la revendication 1,2, 3 ou 4.
       caractérisé en ce que les éléments isolants (4) ont, sur l'un de leurs côtés frontaux, un creux (17) et de l'autre côté frontal, une saillie (18) axiale adaptée au contour du creux (17).
  6. Bloc de résistance suivant l'une ou plusieurs des revendications précédentes, caractérisé en ce que les éléments isolants (4) sont montés avec blocage en rotation sur les boulons (6a ou 6b) de support.
  7. Bloc de résistance suivant les revendications 5 et 6, caractérisé en ce que le creux (17) et la saillie (18) axiale des éléments isolants (4) ont un contour s'écartant de la forme d'un cercle et/ou des éléments (16) de blocage, disposés radialement excentrés sur les éléments isolants (4) et en prise l'un avec l'autre lorsque les éléments isolants (4) sont mis en rangée sur les boulons (6a ou 6b) de support, sont prévus.
  8. Bloc de résistance suivant l'une ou plusieurs des revendications 1 à 7, caractérisé en ce que des surfaces planes (20) pour la réception d'éléments (21) de raccordement sont formées chacune par une section sécante (19) des deux côtés du corps isolant (8).
EP95104724A 1994-04-11 1995-03-30 Appareil de résistance Expired - Lifetime EP0676774B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4412151 1994-04-11
DE4412151 1994-04-11

Publications (3)

Publication Number Publication Date
EP0676774A2 EP0676774A2 (fr) 1995-10-11
EP0676774A3 EP0676774A3 (fr) 1995-11-08
EP0676774B1 true EP0676774B1 (fr) 1997-02-12

Family

ID=6514933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95104724A Expired - Lifetime EP0676774B1 (fr) 1994-04-11 1995-03-30 Appareil de résistance

Country Status (4)

Country Link
EP (1) EP0676774B1 (fr)
AT (1) ATE148955T1 (fr)
CZ (1) CZ284241B6 (fr)
DE (1) DE59500107D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830552A1 (de) * 1998-07-08 2000-01-20 Siemens Ag Widerstandsgerät
DE19846897A1 (de) * 1998-10-12 2000-04-13 Siemens Ag Anordnung von Bremswiderständen

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29506779U1 (de) * 1994-11-30 1996-04-04 Siemens Ag Widerstandsgerät
DE29902641U1 (de) * 1999-02-15 1999-05-12 Siemens Ag Eigenbelüfteter Bremswiderstand
GB9923847D0 (en) 1999-10-09 1999-12-08 Eaton Ltd Resistor banks
CN109659103A (zh) * 2018-12-29 2019-04-19 湖南福德电气有限公司 一种组装式带状电阻器
CN109887692A (zh) * 2019-02-25 2019-06-14 湖南福德电气有限公司 一种负载设备

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3429390A1 (de) * 1984-08-09 1986-02-20 Siemens AG, 1000 Berlin und 8000 München Isolierkoerper mit zentralem durchlass fuer einen tragstab
DE9012340U1 (fr) * 1989-09-21 1991-01-24 Siemens Ag, 8000 Muenchen, De

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830552A1 (de) * 1998-07-08 2000-01-20 Siemens Ag Widerstandsgerät
DE19830552B4 (de) * 1998-07-08 2005-07-07 Gino Gielen + Nothnagel Gmbh Elektrische Widerstandsanordnung
DE19846897A1 (de) * 1998-10-12 2000-04-13 Siemens Ag Anordnung von Bremswiderständen

Also Published As

Publication number Publication date
ATE148955T1 (de) 1997-02-15
EP0676774A3 (fr) 1995-11-08
DE59500107D1 (de) 1997-03-27
CZ284241B6 (cs) 1998-10-14
EP0676774A2 (fr) 1995-10-11
CZ78695A3 (en) 1996-01-17

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