WO2019114918A1 - Dispositif de court-circuit - Google Patents

Dispositif de court-circuit Download PDF

Info

Publication number
WO2019114918A1
WO2019114918A1 PCT/EP2017/082147 EP2017082147W WO2019114918A1 WO 2019114918 A1 WO2019114918 A1 WO 2019114918A1 EP 2017082147 W EP2017082147 W EP 2017082147W WO 2019114918 A1 WO2019114918 A1 WO 2019114918A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical contact
contact element
movable contact
contact body
short
Prior art date
Application number
PCT/EP2017/082147
Other languages
German (de)
English (en)
Inventor
Daniel BÖHME
Ingo Euler
Thomas KÜBEL
Steffen PIERSTORF
Daniel Schmitt
Frank Schremmer
Stefan Stegmeier
Torsten Stoltze
Marcus Wahle
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to PCT/EP2017/082147 priority Critical patent/WO2019114918A1/fr
Priority to EP17837864.2A priority patent/EP3698392A1/fr
Publication of WO2019114918A1 publication Critical patent/WO2019114918A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/004—Closing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H79/00—Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected

Definitions

  • the present invention relates to a
  • Short-circuiting device and a converter, in particular a Multilevelumrichter with such
  • Short-circuiting devices for shorting large cruun conditions such as capacitors in
  • Multilevel converters are subject to high demands in the closing moment, d. H. in the moment in which two electrical cal contact body with different electrical poten tial form a touch contact.
  • high voltages for example at 5000 V DC on a capacitor bank with several mF, for example 4-20 mF, it comes with an aluminum contact for igniting an arc and consequently excessive burnup of the closing element by the ignited during closing arc.
  • the short-circuiting device as a component is in
  • Multilevel converters needed to ensure the continued operation of such systems.
  • the now over-stressed at high voltages component essentially serves as a safety component.
  • the burn by the generated arc leads disadvantageous that no safe electrical con tact can be made.
  • a fire can be caused in case of non-recognition in plant operation.
  • the object is to provide a short-circuiting device for short-circuiting high powers, in which a stable electrical contact can be made.
  • a short-circuiting device for supply, which comprises a first electrical contact body and a second electrical contact body, which spaced from each other spatially. Furthermore, the short-circuiting device comprises a contact element which is movable between a disconnected position and a closed position and which is arranged at least partially on or within the second electrical contact body, does not provide an electrically conductive connection between the first and the second electrical contact body in the disconnected position and the first in the closed position and second electrical contact body by a Bermmux electrically conductive mitei nander connects. Furthermore, the
  • Short-circuiting means a drive device which moves the movable contact element of the second electrical contact body in the direction of the first electrical contact body of the release position in the closed position at a triggering.
  • the movable contact element comprises an insulating layer which is positioned on an end region of the movable contact element facing the first contact body and / or on a surface region of the first contact body which faces the end region of the contact element.
  • the first con tact body is then electrically isolated from the contact element or the second contact body.
  • the contact element may also be referred to as a bolt.
  • the short-circuiting device has the advantage that the arc is reduced or even prevented by the insulating layer applied to the contact element and / or to the first electrical contact body. This is due to the fact that the critical insulation voltage in air is exceeded much later.
  • the two electric con tact body and the contact element and the first electrical contact body have in the disconnected position or in Schellesmo ment time shortly before the formation of touch contact under different potentials.
  • the movable contact element is not provided with an insulation layer, it may be ignited, ie, the arc or breakdown between the movable contact element and the first electrical Contact bodies come.
  • the dielectric strength of air is approximately 3 kV / mm.
  • the movable contact element is preferably a movable, electrically conductive piston or an electrically conductive contact piston. Further preferably, it is in the movable contact element to a movable BewegMap Pacific and in the first and the second electrical contact bodies depending Weil to fixed contact pieces.
  • the insulating layer is positioned on a contact surface of the movable contact element and / or the first electrical contact body rule, which contacts the first electrical contact body rule with the movable contact element in the closed position.
  • the contact surfaces shortly before the formation of the contact contact arise high electric fields, so that an applied here insulation layer be particularly effective prevents or retards a breakdown.
  • the insulating layer preferably has a thickness of 10-100 ⁇ m, more preferably 10-50 ⁇ m, particularly preferably 10-30 ⁇ m. The thickness of the insulating layer is thus given before very thin.
  • Such thin insulating layers as used for example in the field of semiconductor structure can be applied by various processes, for example by spraying hen, dipping or printing on the movable contact element, the invention is not limited to these processes. For example, you can press the screen or stencil printing, jetting or inkjet printing. Through the thin insulation layer can continue to be formed good or secure electrical contacts to the first elec- cal contact body.
  • the insulating layer preferably comprises at least one of the following materials: thermoplastic, duroplastic,
  • Siloxane compound ceramic compound.
  • Suitable thermoplastics include, for example, polyimides, polyamides or polyetheretherketones (PEEK). Epoxy resin, poly (p-phenylene-2,6-benzobisoxazole) (PPBO), for example, comes into consideration as thermosetting plastic. Other inorganic or organic insulation materials in addition to siloxane compounds and ceramic compounds come into consideration.
  • the drive device is preferably a pyrotechnic drive device. With the help of pyrotechnics, it can be the accelerations particularly suitable for such applications he aims. Alternatively, other Antriebseinrich lines such as spring storage can be used.
  • the drive device is preferably designed to accelerate the movable contact element in the transfer of the separation position in the closed position to a predetermined minimum speed, in which the insulating layer tion in the preparation of Bermmunteres ask, in particular abraded, scraped or burned, so contacted the movable contact element in the closed position with the first contact body.
  • a good electrical contact between the first contact body and movable contact element made the who.
  • the drive means may be adapted to accelerate the movable contact element to a minimum speed of over 50 m / s, more preferably over 75 m / s, even more preferably over 100 m / s.
  • the first electrical contact body may preferably comprise a recess complementary in shape to the end region of the movable contact element, into which the movable contact element is retracted in the closed position with at least one part of the end region. This allows the formation of a stabi len contact between the contact element and the first electrical contact body.
  • the insulating layer is positioned at those locations of the movable contact element and / or the first electrical contact body, to which an electrical field strength above the dielectric strength in the movement between the disconnected position and at a movable contact element and a first electrical contact body without insulation layer the closed position is generated.
  • those areas or Be rich are shown on the contact element, at which increased above the dielectric strength lying electrical fields occur.
  • the invention comprises a converter, in particular multilevel converter, which comprises a short-circuiting device according to one of the above embodiments.
  • a converter in particular multilevel converter
  • such short-circuiting devices are required for converters.
  • the advantages of the inverter can be found in the above advantages of the short-circuiting device.
  • Figure 1 is a cross-sectional view of an inventive
  • Figure 2 is a cross-sectional view of a erfindungsspa
  • Short-circuiting device in the closed position according to a first embodiment
  • Figure 3 is a cross-sectional view of a erfindungsspa.
  • Short-circuiting device in disconnected position according to egg ner second embodiment
  • Figure 4 is a cross-sectional view of an inventive
  • Short-circuiting device in disconnected position according to egg ner third embodiment
  • Figure 5 is a cross-sectional view of an end portion of a
  • Figure 6 is a cross-sectional view of an end portion of a
  • Figure 7 is a cross-sectional view of an end portion of a
  • Figure 8 is a cross-sectional view of an end portion of a
  • FIG 1 and Figure 2 is a cross-sectional view of a short-circuiting device 1 according to a first Ausrete tion form shown in a disconnected position or a closed position.
  • the short-circuiting device 1 has a first electrical contact body 10 and a second electrical con tact body 20, which are spaced from each other spatially.
  • the short-circuiting device 1 furthermore has a movable contact element 30.
  • the movable Maisele element 30 is movable between a release position, which is shown in the figure 1 and a closed position, which is shown in the figure 2.
  • the two electricalmaschinekör by 10, 20 are formed from an electrically conductive mate rial.
  • the movable contact element 30, at least in the region between the contact bodies 10, 20, is also removablebil det of an electrically conductive material.
  • the movable contact element 30 is arranged in the disconnected position, see FIG. 1, at least partially on or in the second contact body 20.
  • an elec- trical connection between the movable contact element 30 and the second contact body 20 exist.
  • the movable contact element 30 has the same electrical potential as the second contact body 20.
  • the movement of the movable contact element 30 is generated by a drive device 40.
  • the movable contact element 30 of the second electrical contact body 20 in the direction of the first electrical contact body 10 from the disconnected position, see Figure 1, in the closed position, see Figure 2, moves.
  • the movable contact element 30 also has an insulation layer 50, see FIG. 1.
  • This insulation layer 50 is positioned on an end region 35 of the movable contact element 30 facing the first electrical contact body 10.
  • the end portion 35 is an area of the movable contact element 30, on which hen hen moving the movable contact element 30 to the first contact body 10 high electric fields entste.
  • the insulating layer 50 may advantageously prevent or at least delay or reduce the occurrence of an arc or breakdown. As a result, good electrical contact between the first electrical contact body 10 and the second contact body 20 can be produced by means of the movable contact element 30.
  • an insulating gas gap 90 between the movable contact element 30 and the first electrical contact body 10 in the disconnected position, see Figure 1, is provided.
  • the gas line 90 may example, be filled with air, the invention is not limited thereto.
  • a contact surface 37 is formed, on which the insulating layer 50 is positioned or applied.
  • this contact surface 37 lies flat on the first electrical contact body 10 and thus establishes a physical contact with the first electrical contact body 10.
  • the positioning of the insulating layer 50 on the contact surface 37 is advantageous, since high electric fields are generated just before contact on these surfaces, which result in an arc, respectively . By- can lead what prevents by the insulating layer 50 ver or at least reduced or delayed.
  • the insulating layer 50 may have a thickness D of 10-100 ym, more preferably 10-50 ym, particularly preferably 10-30 ym, wherein as materials for the insulating layer 50 preferably the following materials are suitable: Thermo plast, thermoset, siloxane , Ceramic compound. Combinations of these materials are encompassed by the invention, wherein the invention is not limited to these isolation mate rials and thicknesses D.
  • a drive means 40 a py rotechnische drive means. This generates when triggered by outflowing gases, a thrust force to move the movable contact element 30 in the direction of the first electrical contact body 10.
  • a thrust force to move the movable contact element 30 in the direction of the first electrical contact body 10.
  • a pyrotechnic to drive device is particularly suitable to achieve the REQUIRED chen speeds.
  • the drive device 40 is formed in this embodiment, at play to the movable contact element 30 in the transfer of the release position, see Figure 1, in the closed position, see Figure 2, to accelerate to a Restaurantstimm te minimum speed.
  • the insulating layer 50 is degraded during the production of Bermmromees.
  • the insulating layer 50 can be abraded, scraped or burnt, for example by friction, so that the movable contact element 30 contacts the first electrical contact body 10 directly in the closed position.
  • the insulating layer 50 in the closed position, see Figure 2, as described above used up that is no longer available.
  • the speeds generated by the drive device 40, with which the movable contact element 30 is moved in the direction of the first contact body 10, can accelerate to over 50 m / s, more preferably over 75 m / s, especially before given to more than 100 m / s , Especially atcruisingschwin speeds of about 100 m / s can be ensured that a sufficiently thin insulating layer 50 is degraded as described above.
  • the thickness D of the insulating layer 50 In the course of producing the thickness D of the insulating layer 50, it must thus be ensured that it can be consumed even at the speeds generated by the drive device 40, as described above, so that a good electrical contact can be formed.
  • the thickness D is therefore subject to optimization, since this must be sufficiently insulating, but also to be consumed during the movement.
  • the first electrical contact body 10 also has a recess 12 which is complementary in shape to the end region 35 of the movable contact element 30.
  • the movable contact element 30 In the closed position, see Figure 2, the movable contact element 30 is retracted with at least a portion of the end portion 35 in the recess 12.
  • the end portion 35 of the movable contact element 30 is cone-shaped as well as the recess complementary thereto. Corresponding insertion aids can be provided within the recess 12 in order to establish a secure contact.
  • the short-circuiting device 1 further comprises, in this embodiment, a coaxial arrangement with the contact bodies 10, 20, an insulating round tube 80, 85 which connects the electrical contact bodies 10, 20 to one another and thus stabilized velvet arrangement.
  • screw connections 70, 75 are provided by way of example in the insulating round tube 85.
  • the movable contact element 30 is suitably put together in this embodiment of different piston-shaped pieces, the invention is not limited thereto.
  • the movable contact element 30 may also be of uniform construction.
  • the drive means 40 is applied in this purely exemplary embodiment, a socket-like piston piece 32 to which the Antriebseinrich device 40 acts directly and when triggered for a
  • Thrust action of the entire movable contact element 30 in the direction of the first contact body 10 provides.
  • a support piece 33 is provided, to which a contact piece 34 connects.
  • the socket-like piston piece 32 is used to isolate the drive device to 40 against the movable contact element 30. In other embodiments, can be dispensed with such an insulation and thus on support piece 33 and piston piece 32.
  • the electrical contacts with the electrical contact bodies 10, 20 Herge provides.
  • the movable contact member 30 includes in a certain portion be an on the side surfaces below the end portion 35 an outward expansion 31, wel che in the closed position, see Figure 2, contacted with an inwardly directed portion of the second electrical contact body 20, so also a secure connection to the two-th electrical contact body 20 can be made.
  • Figure 3 is a cross-sectional view of a
  • Short-circuiting device 1 shown in the release position according to a two-th embodiment.
  • an insulating layer 50 ' is also disposed on a surface region 14 of the first electrical area facing the end region 35 of the movable contact element 30 Contact body 10 is positioned.
  • the insulating layer 50 may be omitted on the end portion 35 of the movable contact member 30 so that only one insulation layer 50 'is provided on the first electrical contact body 10.
  • the insulating layer 50 ' is positioned within the recess 12 in this embodiment.
  • the insulating layer 50 'on a con tact region 37' of the first electrical contact body 10 po sitioned.
  • This contact area 37 ' contacts the first electrical contact body 10 with the movable Mixele element 30 in the closed position, see Figure 2.
  • the Isolati ons Mrs 50' can also be alternatively positioned at those Stel len of the first electrical contact body 10, to which at a movable Contact element without insulation layer, an electric field strength above the dielectric strength in the movement between the separation position and the closed position is generated.
  • the insulating layer 50 ' is also made to the description content to Figure 1 and 2.
  • FIG. 4 shows a cross-sectional view of a fiction, contemporary short-circuiting device 1 is shown in the release position after egg ner third embodiment. Compared to Figure 1, the short-circuiting device 1 without insulated drive device 40 is shown. In this case, no piston piece 32 is provided purely by way of example in comparison to FIG.
  • Figures 5 to 8 show in cross-section different ne embodiments for positioning of insulation layers 50 on the movable contact element 30.
  • the insulating layer 50 may be positioned at those points of the movable contact element 30, on which a movable contact element without Isolati ons slaughter an electric field strength above the impact strength is generated in the movement between the disconnected position and the closed position. This does not necessarily coincide with the BeWe movement of the movable contact element from the disconnected position into the closed position with the contact surface 37. By detecting the electric fields in the movement of a contact element, these locations can be loka Linstrument and then provided with insulation layer 50 accordingly.
  • Figure 5 shows an example of a rectangular executed end portion 35 of the movable contact element 30, which is coated with an insulating layer 50.
  • the contact surface 37 can lie both in the side region and on the front surface of the movable contact element 30.
  • FIG. 6 shows by way of example a conically shaped end region 35 similar to FIG. 1 of the movable contact element 30, which is coated with an insulation layer 50.
  • the contact surface 37 can lie both in the side region and on the front surface of the movable contact element 30.
  • Figure 7 shows an example of a rounded shaped Endbe rich 35 of the movable contact element 30, which is coated with egg ner insulation layer 50.
  • the contact surface 37 can lie both in the side region and on the front surface of the movable contact element 30.
  • Figure 8 shows an example of a conically executed Endbe rich 35 of the movable contact element 30.
  • the insulating layer 50 is applied in comparison to the figures 5 to 7 only at the lateral contact surfaces 37.
  • the tip or front surface remains free in this exemplary embodiment.

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  • Contacts (AREA)

Abstract

L'invention concerne un dispositif de court-circuit (1) qui comprend un premier corps de contact (10) électrique et un deuxième corps (20) électrique distant. Il comprend aussi un élément de contact (30) mobile entre une position de séparation et une position de fermeture, qui ne fournit aucune connexion conductrice d'électricité entre le premier et le deuxième corps de contact (10, 20) électrique dans la position de séparation et qui connecte de manière conductrice électriquement le premier et le deuxième corps de contact (10, 20) dans la position de fermeture. Il comprend en outre un dispositif d'entraînement (40), lequel, en cas d'activation, déplace l'élément de contact (30) mobile du deuxième corps de contact (20) électrique en direction du premier corps de contact (10) électrique de la position de séparation à la position de fermeture. L'élément de contact (30) mobile comprend une couche isolante (50), laquelle est positionnée sur une partie d'extrémité (35) de l'élément de contact (30) mobile faisant face au premier corps de contact (10) et/ou sur une zone de surface du premier corps de contact (10) électrique faisant face à la partie d'extrémité (35) de l'élément de contact (30) mobile.
PCT/EP2017/082147 2017-12-11 2017-12-11 Dispositif de court-circuit WO2019114918A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2017/082147 WO2019114918A1 (fr) 2017-12-11 2017-12-11 Dispositif de court-circuit
EP17837864.2A EP3698392A1 (fr) 2017-12-11 2017-12-11 Dispositif de court-circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/082147 WO2019114918A1 (fr) 2017-12-11 2017-12-11 Dispositif de court-circuit

Publications (1)

Publication Number Publication Date
WO2019114918A1 true WO2019114918A1 (fr) 2019-06-20

Family

ID=61132372

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/082147 WO2019114918A1 (fr) 2017-12-11 2017-12-11 Dispositif de court-circuit

Country Status (2)

Country Link
EP (1) EP3698392A1 (fr)
WO (1) WO2019114918A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024103096A1 (fr) * 2022-11-15 2024-05-23 Miba Emobility Gmbh Dispositif de commutation d'urgence électrique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150266A (en) * 1977-01-27 1979-04-17 Networks Electronic Corp. Miniature pyrotechnic squib switch, single pole, normally open
EP1052665A2 (fr) * 1999-04-12 2000-11-15 Moeller GmbH Court-circuiteur
CN102005336A (zh) * 2010-11-17 2011-04-06 武汉长海电气科技开发有限公司 爆炸式闭合开关
WO2011107363A1 (fr) 2010-03-04 2011-09-09 Siemens Aktiengesellschaft Commutateur à bornes de connexion pourvues de barres omnibus à montage bilatéral fixe
US20130255464A1 (en) * 2010-12-27 2013-10-03 Daikin Industries, Ltd. Cutter
WO2013185815A1 (fr) * 2012-06-13 2013-12-19 Abb Technology Ltd Ensemble commutateur de dérivation
DE102015203646A1 (de) * 2015-03-02 2016-09-08 Siemens Aktiengesellschaft Elektrische Kurzschließereinrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150266A (en) * 1977-01-27 1979-04-17 Networks Electronic Corp. Miniature pyrotechnic squib switch, single pole, normally open
EP1052665A2 (fr) * 1999-04-12 2000-11-15 Moeller GmbH Court-circuiteur
WO2011107363A1 (fr) 2010-03-04 2011-09-09 Siemens Aktiengesellschaft Commutateur à bornes de connexion pourvues de barres omnibus à montage bilatéral fixe
CN102005336A (zh) * 2010-11-17 2011-04-06 武汉长海电气科技开发有限公司 爆炸式闭合开关
US20130255464A1 (en) * 2010-12-27 2013-10-03 Daikin Industries, Ltd. Cutter
WO2013185815A1 (fr) * 2012-06-13 2013-12-19 Abb Technology Ltd Ensemble commutateur de dérivation
DE102015203646A1 (de) * 2015-03-02 2016-09-08 Siemens Aktiengesellschaft Elektrische Kurzschließereinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024103096A1 (fr) * 2022-11-15 2024-05-23 Miba Emobility Gmbh Dispositif de commutation d'urgence électrique

Also Published As

Publication number Publication date
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