EP3594978B1 - Appareil pour commuter une del - Google Patents

Appareil pour commuter une del Download PDF

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Publication number
EP3594978B1
EP3594978B1 EP18182430.1A EP18182430A EP3594978B1 EP 3594978 B1 EP3594978 B1 EP 3594978B1 EP 18182430 A EP18182430 A EP 18182430A EP 3594978 B1 EP3594978 B1 EP 3594978B1
Authority
EP
European Patent Office
Prior art keywords
electrode
contact
switch
moving
further contact
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.)
Active
Application number
EP18182430.1A
Other languages
German (de)
English (en)
Other versions
EP3594978A1 (fr
Inventor
Thierry Delachaux
Alexey Sokolov
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.)
ABB Schweiz AG
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ABB Schweiz AG
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Publication date
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Priority to EP18182430.1A priority Critical patent/EP3594978B1/fr
Publication of EP3594978A1 publication Critical patent/EP3594978A1/fr
Application granted granted Critical
Publication of EP3594978B1 publication Critical patent/EP3594978B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact

Definitions

  • the invention is related to an apparatus to switch a light emitting diode (LED) or another load, comprising a mechanical switch, which comprises a moving electrode, wherein the moving electrode is a contact, which electrically gets in connection with a further contact or electrode to enable a current flow while a closing phase, and wherein the apparatus comprises a body which absorbs or dissipates the kinetic energy and/ or the momentum which is exerted from the moving electrode on the further contact or electrode.
  • a mechanical switch which comprises a moving electrode, wherein the moving electrode is a contact, which electrically gets in connection with a further contact or electrode to enable a current flow while a closing phase
  • the apparatus comprises a body which absorbs or dissipates the kinetic energy and/ or the momentum which is exerted from the moving electrode on the further contact or electrode.
  • EP 0 560 696 A1 shows an apparatus with ferrometallic blocks, which are rigidly clamped in a housing.
  • LED lamps are replacing the traditional light bulbs for the sake of their more efficient conversion of electricity into light. This change is even enforced by regulation in most of the countries worldwide.
  • Typical inrush peak currents are ranging about 10 times higher than then rated current.
  • the object of the invention therefore is to prevent bounces of electrodes, especially to prevent bounces of a moving electrode of a mechanical switch.
  • the apparatus comprises a body which absorbs or dissipates the kinetic energy and/ or the momentum which is exerted from the moving electrode on the further contact or electrode.
  • the reason for the bounces especially in light switches is due to a collision between two bodies, i.e. the two electrodes when they close. Physically, two bodies entering into an elastic collision are unable to collide without a bounce. The reason is due to the fact that the momentum and energy equations cannot be fulfilled. In order to have two bodies colliding without bouncing, the collision must be either very inelastic, i.e. energy absorbed by the system, or there must be a third body involved in the collision. In the latter case, the equations of momentum and energy can be fulfilled.
  • the further contact or electrode is fixed and the body is arranged at least partially behind the further contact or electrode on a side which is averted to that side of the further contact or electrode where the moving electrode impacts on the further contact or electrode.
  • a momentum or pulse can be directed and transmitted or transferred to the body.
  • a third body behind a fixed electrode so that it takes the kinetic energy and dissipates it, so that it prevents the electrodes from bouncing.
  • the body is a movable body.
  • a movable body can move in such a way that the two contacts or electrodes remain on their place without bouncing when the mechanical switch is closed and the contacts are electrically connected.
  • the body is separated from the moving electrode and the further electrode. Through this the body can move independently from the electrically connected electrodes.
  • the body can be lead in a rail or can hang on a wire to be movable in a defined manner.
  • the body is also a contact or an electrode, through which current can flow. Through this current can be lead into a combined element having a bigger cross section through which current can flow.
  • the body is part of a contact or an electrode. Through this an electrode can be integrated into the body.
  • the body is made of a polymer or comprises a polymer.
  • a polymer is insulating and has a low density. Polymers are used to create cases or housings of standard mechanical switches.
  • the body is a part of a case of the mechanical switch.
  • the case itself is the body.
  • the polymer case that is part of a traditional switch. It is possible to transform a polymer part behind the normally fixed electrode, so that it has an appropriate mass and shape in order to move and to take the momentum and/ or kinetic energy of the collisions, while leaving two metallic electrodes without motion.
  • the polymer parts behind fixed contacts which are parts of the switch case, advantageously are used and reshaped in order to play the role of a third body, i.e. transforming the already existing physical switch geometry rather than adding a new part.
  • the geometry of a third body advantageously is such that the kinetic energy is efficiently dissipated into a moving arm holding the third body. Like this, the new part is not coming back and retransferring its velocity to the two electrodes, like it would be for example in a Newton's cradle game.
  • the field of the invention relates to mechanical switches, in particular to mechanical switches at low voltages, namely smaller than 1 kV, such as rocker light switches.
  • the invention relates to applications of light switches with LED lamps, or any other type of loads with high inrush currents occurring during the making of the current.
  • an apparatus described above is used to avoid any bouncing and/ or arcs in the mechanical switch.
  • Fig. 1 illustrates, that a high inrush current occurs during the first milliseconds due to the sudden charge of capacitors located in a LED driver (AC/DC converter), when switching on a LED lamp.
  • Typical inrush peak currents are ranging about 10 times higher than then rated current.
  • Fig. 2 shows an illustration of the principle of the invention with the Newton's cradle "game"
  • the kinetic energy of the left ball can be fully transmitted to the right one during a collision, while leaving the middle and left ball nonmoving.
  • the dashed lines show the moving balls. First the left ball moves and impacts in the direction of the arrow on the middle ball, then the right ball moves in the direction of the arrow and the left and middle ball remain motionless. The momentum of the left ball is transmitted or transferred to the right ball.
  • Fig. 3 shows an apparatus 1 to switch a light emitting diode (LED) or another load, comprising a mechanical switch 2, which comprises a moving electrode 3, wherein the moving electrode 3 is a contact, which electrically gets in connection with a further contact or electrode 4 to enable a current flow while a closing phase of the mechanical switch 2.
  • a mechanical switch 2 which comprises a moving electrode 3, wherein the moving electrode 3 is a contact, which electrically gets in connection with a further contact or electrode 4 to enable a current flow while a closing phase of the mechanical switch 2.
  • the apparatus 1 further comprises a body 5, which absorbs or dissipates the kinetic energy and/ or the momentum, which is exerted from the moving electrode 3 on the further contact or electrode 4.
  • the principle is as follows: First the moving electrode 3 moves and impacts in the direction of the arrow on the further electrode 4, then the body 5, in this case a ball, moves in the direction of the arrow and the moving electrode 3 and the further electrode 4 remain motionless and are electrically connected. The momentum of the moving electrode 3 is transmitted to the right ball.
  • the dashed lines show the moving parts.
  • the further contact or electrode 4 is fixed and the body 5 is arranged at least partially behind the further contact or electrode 4 on a side, which is averted to that side of the further contact or electrode 4 where the moving electrode 3 impacts on the further contact or electrode 4.
  • the body 5 is a movable body.
  • the body 5 is separated from the moving electrode 3 and the further electrode 4.
  • the body 5 is made of a polymer.
  • the body 5 hangs on a wire and can swing out like a pendulum in the direction of the arrow.
  • the ball may also be a polymeric part and connected or hung up in another manner, as described later.
  • Fig. 4 schematically shows on the left side an illustration of a standard rocker light switch, and on the right side a further apparatus 1a, comprising a modified light switch case, that shows a third additional contact.
  • the movable body 5a is also a contact or an electrode, through which current can flow.
  • This body 5a is also movable in the direction of the arrow as shown on the right side of Fig. 4 , when the mechanical switch 2a is closed.
  • Fig. 5 schematically shows a modified standard rocker light switch, having a base 6, that comprises a third additional body 5b, which is formed into the polymer of the case 7.
  • the third additional body 5b lies just below the bottom electrode 4 of the mechanical switch 2b.
  • Fig. 5 insofar shows a further apparatus 1b, wherein the body 5b is a part of a case 7 of the mechanical switch 2b.
  • the third body 5b is not completely made of a polymer it can have the function of a third electrode or contact additionally to its dissipating function.
  • Fig. 5 it is shown to use the polymer case 7, that is part of a traditional switch, and to transform the polymer part behind the normally fixed electrode 4.
  • the polymer part has an appropriate mass and shape in order to move and to take the momentum and kinetic energy of the collisions, while leaving the two metallic electrodes 3, 4 without motion.
  • the polymer parts behind fixed contacts namely parts of a switch case 7, advantageously are used and reshaped in order to play the role of a third body 5b, i.e. transforming the already existing physical switch geometry rather than adding a new part.
  • a third body 5b is such that the kinetic energy is efficiently dissipated into a moving arm 8 holding the third body 5b. Like this, the new part is not coming back and retransferring its velocity to the two electrodes 3, 4, like it would be for example in a Newton's cradle game.
  • the apparatuses 1, 1a, 1b shown here may also be encapsulated as a whole or in part in a case 7.

Claims (7)

  1. Appareil (1, 1a, 1b) permettant de commuter une diode électroluminescente (DEL) ou une autre charge, comprenant un commutateur mécanique (2, 2a, 2b), qui comprend une électrode mobile (3), dans lequel l'électrode mobile (3) est un contact, qui entre électriquement en connexion avec un contact ou une électrode (4) supplémentaire pour l'activation d'un flux de courant pendant une phase de fermeture, et dans lequel l'appareil (1, 1a, 1b) comprend un corps (5, 5a, 5b) qui absorbe ou dissipe l'énergie cinétique et/ou le moment qui est exercé à partir de l'électrode mobile (3) sur le contact ou l'électrode (4) supplémentaire, dans lequel le corps (5, 5a, 5b) est séparé de l'électrode mobile (3),
    caractérisé en ce que le corps (5, 5a, 5b) est un corps mobile, dans lequel le corps (5, 5a, 5b) est séparé de l'électrode (4) supplémentaire, de sorte que le corps (5, 5a, 5b) peut se déplacer indépendamment des électrodes connectées électriquement.
  2. Appareil selon la revendication 1, caractérisé en ce que le contact ou l'électrode (4) supplémentaire est fixé et le corps (5, 5a, 5b) est disposé au moins partiellement sous le contact ou l'électrode (4) supplémentaire sur un côté qui est opposé à ce côté du contact ou de l'électrode (4) supplémentaire, où l'électrode mobile (3) percute le contact ou l'électrode (4) supplémentaire.
  3. Appareil selon l'une des revendications précédentes, caractérisé en ce que le corps (5a, 5b) est également un contact ou une électrode, à travers lequel du courant peut circuler.
  4. Appareil selon l'une des revendications 1 ou 2, caractérisé en ce que le corps (5b) est une partie d'un contact ou d'une électrode (4).
  5. Appareil selon l'une des revendications précédentes, caractérisé en ce que le corps (5, 5a, 5b) est composé d'un polymère ou comprend un polymère.
  6. Appareil selon l'une des revendications précédentes, caractérisé en ce que le corps (5b) fait partie d'un boîtier (7) du commutateur mécanique (2b) ou en ce que le boîtier (7) lui-même est le corps.
  7. Procédé d'utilisation d'un appareil (1, 1a, 1b) selon l'une des revendications précédentes permettant d'éviter tout rebondissement ou arcs dans le commutateur mécanique (2, 2a, 2b).
EP18182430.1A 2018-07-09 2018-07-09 Appareil pour commuter une del Active EP3594978B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18182430.1A EP3594978B1 (fr) 2018-07-09 2018-07-09 Appareil pour commuter une del

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18182430.1A EP3594978B1 (fr) 2018-07-09 2018-07-09 Appareil pour commuter une del

Publications (2)

Publication Number Publication Date
EP3594978A1 EP3594978A1 (fr) 2020-01-15
EP3594978B1 true EP3594978B1 (fr) 2022-05-11

Family

ID=62904345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18182430.1A Active EP3594978B1 (fr) 2018-07-09 2018-07-09 Appareil pour commuter une del

Country Status (1)

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EP (1) EP3594978B1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB629300A (en) * 1945-12-08 1949-09-16 Frederick Leonard Cook Improvements in electrical snap acting switches
US2743330A (en) * 1954-04-12 1956-04-24 Ludwig Louis Silent switch structure
FR2688625B1 (fr) * 1992-03-13 1997-05-09 Merlin Gerin Contact d'un disjoncteur a boitier moule

Also Published As

Publication number Publication date
EP3594978A1 (fr) 2020-01-15

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