EP3189534B1 - Dispositif de commutation pour un transformateur de réglage, en particulier un présélecteur - Google Patents

Dispositif de commutation pour un transformateur de réglage, en particulier un présélecteur Download PDF

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Publication number
EP3189534B1
EP3189534B1 EP15753056.9A EP15753056A EP3189534B1 EP 3189534 B1 EP3189534 B1 EP 3189534B1 EP 15753056 A EP15753056 A EP 15753056A EP 3189534 B1 EP3189534 B1 EP 3189534B1
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EP
European Patent Office
Prior art keywords
tap
winding
contact
vacuum interrupter
connection terminal
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
EP15753056.9A
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German (de)
English (en)
Other versions
EP3189534A1 (fr
Inventor
Eduard ZERR
Andreas Stocker
Moritz BENGLER
Markus ZINTL
Martin PANKOFER
Wladimir Bauer
Benedikt ITTLINGER
Gerhard BÄUML
Sebastian Rehkopf
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.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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.)
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Application filed by Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP3189534A1 publication Critical patent/EP3189534A1/fr
Application granted granted Critical
Publication of EP3189534B1 publication Critical patent/EP3189534B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0038—Tap change devices making use of vacuum switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/04—Levers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing

Definitions

  • the present invention relates to a switching arrangement for a regulating transformer for selectively connecting a first winding and a second winding of the regulating transformer and in particular a preselector.
  • Preselector which can be designed as a reverser, coarse or Mehrfachgrobrichler generally serve in an on-load tap changer for a control transformer with main winding and control winding to expand the control range of the control transformer, also called tapped transformer.
  • Turners make it possible to connect the control windings to the main winding either in the same direction or in opposite directions to the main winding.
  • Rough selectors make it possible to connect a larger part of the main winding, a so-called coarse step winding or coarse step, optionally with the control winding or not, so to bridge the coarse stage winding.
  • Both the step winding of a control transformer and the coarse step are briefly separated galvanically from the main winding during their switchover by turning or coarse selector. They assume an electrical potential which results from the voltages of the neighboring windings as well as the coupling capacitances to these windings and to grounded parts. The resulting differential voltages are sometimes considerable; they claim the switching path of the opening preselector contacts and can lead to unacceptable discharges at the appropriate height. Such discharges, also called arcs, cause gas formation in the insulating oil of the on-load tap-changer. This is undesirable, especially as the system voltage increases, the amount of unwanted gases increases.
  • the preselector comprises two fixed preselector contacts and may be designed as a turner or coarse selector.
  • One fixed preselector contact is electrically connected to the beginning of the control winding and the other fixed preselector contact is electrically connected to the end of the control winding.
  • a movable contact is provided whose root terminal is electrically connected to the main winding of the tapped transformer and which selectively connects one of the fixed preselector contacts.
  • the mobile one Contact is formed longitudinally displaceable and has a hermetically sealed against the environment switching chamber in which, also longitudinally displaceable, contact pieces are.
  • the contacts are closed when switching to one of the fixed preselector contacts against the force of a spring, but opened during the switching between the fixed preselector contacts.
  • a disadvantage of this known tap changer is that the arrangement, drive and storage of the switching chamber have a large design effort and require a lot of space.
  • a formulation of the type "A is connected to B” includes the meanings “A is directly electrically conductively connected to B” and “A is indirectly, ie via C, electrically conductively connected to B", and has a formulation of the type " A is connected to B “meaning” A is electrically connected directly to B ".
  • the proposed switching arrangement allows by using a vacuum interrupter in conjunction with moving contacts and fixed contacts a particularly simple and compact design. By separating the vacuum interrupter from the moving contacts and fixed contacts, it is possible to arrange them independently of each other and thus make the best use of the available space.
  • the vacuum interrupter additionally prevents the formation of gases in the insulating oil.
  • the open vacuum interrupter increases the dielectric strength and prevents arcing between the moving contacts and fixed contacts.
  • the proposed switching arrangement may be formed as desired in any manner and include, for example, at least one or no additional vacuum interrupter.
  • the vacuum interrupter is stationary or stationary, relative to the moving contacts, mounted so that the structure of the switching arrangement can be designed as particularly compact. For the operation of the vacuum interrupter this must not be moved.
  • control transformer it is provided in an example, three-phase design of the control transformer that three of the proposed switching arrangements are arranged one above the other, wherein the moving contacts and the vacuum interrupters of all switching arrangements are actuated via a common switching tube.
  • the first moving contact, the first fixed contact and the second fixed contact are in a dielectric medium or air or SF6 or insulating oil and / or are formed by a mechanical changeover switch, which in particular does not include a vacuum interrupter and a semiconductor switch.
  • the second moving contact, the third fixed contact and the fourth fixed contact are in a dielectric medium or air or SF6 or insulating oil and / or are formed by a mechanical changeover switch, which in particular does not include a vacuum interrupter and a semiconductor switch.
  • the fourth connection terminal may be or may be connected, for example, via the resistor to ground or to ground potential or to a derivative of the regulation transformer.
  • the derivative for its part, may or may not be connected to ground or ground, for example.
  • the switching arrangement is designed as a preselector and in particular as a turner or coarse selector.
  • FIG. 1 an exemplary embodiment of a control transformer 4 is schematic 1, which comprises a high-voltage or primary side with a first and second winding 2, 3, an undervoltage or secondary side 40 and an on-load switch 46 with a diverter switch 45, a selector 47 and a switching arrangement 1 according to the invention.
  • the control transformer 4 is surrounded by a transformer housing 42. With the arranged inside the transformer housing 42 on-load tap-changer 46, the various taps 13 (see FIG. 2 ) of the control transformer 4 are connected. In order to ensure a proper operation of the control transformer 4, the on-load tap-changer 46 must perform the required switching sequence without interference.
  • the on-load tap-changer 46 projects into the transformer housing 42, which may be filled with oil depending on the type of regulating transformer 4.
  • the on-load tap-changer 46 here comprises, for example, diverter switch 45 and selector 47, but may also be designed as a load selector.
  • the on-load tap-changer 46 is actuated by means of a motor drive 48, which is fastened to an outer wall 43 of the transformer housing 42, via a linkage.
  • the motor drive 48 may also be directly on the lid 41, so at the top of the on-load tap-changer 46, mounted.
  • the regulating transformer 4 usually comprises at least one first winding 2 and one second winding 3 for each phase, which can be electrically connected to one another by the switching arrangement 1, which can be designed as a turn or coarse selector, as described below FIG. 2 is described in detail.
  • FIG. 2a a circuit diagram of a first embodiment of the switching arrangement 1 for an on-load tap-changer 46 is shown schematically.
  • the switching arrangement 1 comprises three connection terminals 2.1, 3.1, 3.2, wherein the first connection terminal 2.1 with the first winding 2, the second terminal 3.1 with a first tap 3.3 of the second winding 3 and the third terminal 3.3 with a second tap 3.4 of the second winding. 3 are connected.
  • the first and second taps 3.3, 3.4 are each connected to the ends of the second winding 3.
  • the first winding 2 as a parent winding and the second winding 3 is formed as a control winding and the switching device 1 fulfills the function of a Wenders.
  • the switching arrangement 1 comprises four fixed contacts 5.1, 5.2, 5.3, 5.4, a stationary vacuum interrupter 6 and two moving contacts 7, 8.
  • the second and fourth fixed contact 5.2, 5.4 are electrically conductively connected to the second terminal 3.1.
  • the first and third fixed contact 5.1, 5.3 are electrically connected to the third terminal 3.2.
  • the first moving contact 7 is electrically connected via the vacuum interrupter 6 to the first terminal 2.1.
  • the second moving contact 8 is electrically connected directly to the first terminal 2.1.
  • the first moving contact 7 can optionally be connected or contacted with the first or second fixed contact 5.1, 5.2.
  • the second moving contact 8 can optionally be connected or contacted with the third or fourth fixed contact 5.3, 5.4.
  • FIG. 2 B shows the first step of switching the switching device 1 of FIG. 2a , Initially, the second moving contact 8 is released from the third fixed contact 5.3, so that the first winding 2 is only connected via the vacuum interrupter 6, the first moving contact 7 and the first fixed contact 5.1 with the second terminal 3.2 of the second winding 3.
  • FIG. 2c shows the second step in which the vacuum interrupter 6 is opened so that there is no electrically conductive connection between the first and second windings 2, 3.
  • FIG. 2d shows the third step, in which the first moving contact 7 is released from the first fixed contact 5.1.
  • FIG. 2e shows the fourth step, in which the first moving contact 7 is switched to the second fixed contact 5.3.
  • FIG. 2f shows the fifth step, in which the vacuum interrupter 6 is closed, so that the first winding 2 via the vacuum interrupter 6, the first moving contact 7 and the second fixed contact 5.2 is electrically connected to the first terminal 3.1.
  • FIG. 2g shows the sixth step, in which the second moving contact 8 is switched to the fourth fixed contact 5.4, so that the first winding 2 on the one hand via the vacuum interrupter 6, the first moving contact 7 and the second fixed contact 5.2 and the other parallel thereto via the second moving contact 8 and the fourth fixed contact 5.4 is electrically connected to the first terminal 3.1.
  • FIG. 3 and 4 is a preferred embodiment of the switching arrangement 1 of FIG. 2ag as a structural design for a phase shown schematically.
  • the switching arrangement 1 has a plurality of arranged in a circle vertical contact bars 20 which are arranged around a vertical switching tube 21.
  • the vacuum interrupter 6 is parallel to the contact bars 20, that is mounted vertically or stationary between an upper holder 22 and a lower holder 23. Both holders 22, 23 are attached to at least one contact rod 20.
  • a first diverter ring 24 and a second diverter ring 25 are mounted on the switching tube 21 . Both Ableitringe 24, 25 are mounted so that a relative movement between them and the switching tube 21 is possible.
  • the diverting rings 24, 25 are permanently installed and the switching tube 21 can be rotated about its own axis between two positions.
  • the second diverter ring 25 is electrically conductively connected via a line 26 to the vacuum interrupter 6.
  • the line 26 fixes the second diverter ring 25.
  • the first moving contact 7 is fastened to the switching tube 21 and establishes an electrically conductive connection between the second diverter ring 25 and optionally the first fixed contact 5.1 or the second fixed contact 5.2 by rotation of the switching tube 21.
  • the first diverter ring 24 is connected via a line 27 directly to the first terminal 2.1 electrically conductive.
  • the line 27 fixes the first diverter ring 24.
  • the second moving contact 8 is attached to the switching tube 21 and provides by rotation of the switching tube 21 an electrically conductive connection between the first diverter ring 24 and optionally the third fixed contact 5.3 or the fourth fixed contact 5.4 ago.
  • the first and second moving contacts 7, 8 are preferably mounted parallel to each other horizontally on the switching tube 21.
  • the moving contacts 7, 8 perform a pivoting movement and thereby connect the four fixed contacts 5.1-5.4.
  • the second and the fourth fixed contact 5.2, 5.4 are mounted on a contact rod 20 one above the other and electrically conductively connected via a line 29.
  • the first and the third fixed contact 5.1, 5.3 are attached to an adjacent contact rod 20 and also electrically connected via a line 28.
  • the third and the fourth fixed contact 5.3, 5.4 are each formed such that when turning the shutter tube 21 of the second moving contact 8 of the respective fixed contact 5.3, 5.4. first solves, while the first moving contact 7 moves in parallel, but longer on the first or second fixed contact 5.1, 5.2 remains switched.
  • Each moving contact 7, 8 comprises a housing 50 and resiliently mounted contact fingers 51 extending from a first end 52 to a second end 53 through the interior of the housing 50. Between the first end 52 of the contact fingers 51 and the respective diverter ring 24, 25 there is a sliding connection, which is always ensured during the rotation of the switching tube 21. The second end 53 of the contact fingers 51 also slides on the respective fixed contacts 5.1-5.4 on or from these.
  • a cam 30 is also mounted, which also performs a pivoting movement during the rotation of the switching tube 21.
  • the cam 30 cooperates in the pivoting movement with a rocker arm assembly 31 through which the vacuum interrupter 6 is opened or closed.
  • the switching arrangement 1 is constructed such that by the arrangement of the moving contacts 7, 8, the fixed contacts 5.1-5.4 and the cam 30 on the switching tube 21, a switching according to FIG. 2a-2g can be performed.
  • FIG. 5a a second embodiment of the switching arrangement 1 is shown schematically. This embodiment is similar to the first embodiment, so that below all the differences are explained in detail.
  • the switching arrangement 1 comprises a fourth connection terminal 3.6, which can be connected to a third tap 3.5 of the second winding 3 between the first tap 3.3 and the second tap 3.4, preferably in the middle.
  • a fourth connection terminal 3.6 At the fourth terminal 3.6, an electrically connected to the ground potential 9 resistor 10 is connected. This serves as a polarity resistor when switching the switching device.
  • FIG. 5b a third embodiment of the switching arrangement 1 is shown schematically. This embodiment is similar to the second embodiment, so that below the differences are explained in detail.
  • an isolator 11 is connected between the ground potential 9 and the resistor 10, by means of which the resistor 10 can be electrically separated from the ground potential 9.
  • the release switch 11 is closed before the operation of the two moving contacts 7, 8 and opened after the switching of the moving contacts 7, 8 carried out.
  • FIG. 5c a fourth embodiment of the switching arrangement 1 is shown schematically. This embodiment is similar to the third embodiment, so that below the differences are explained in detail.
  • a vacuum interrupter 12 is connected between the ground potential 9 and switch 11, with the aid of which the resistor 10 can be electrically separated from the ground potential 9 before the release switch 11 is actuated.
  • the arrangement or sequence of resistor 10, switch 11 and vacuum interrupter 12 between the fourth terminal 3.6 and the ground potential 9 can be designed arbitrarily.
  • the vacuum interrupter 12 is closed after closing the release switch 11, thus before the operation of the moving contacts 7, 8.
  • the vacuum interrupter 12 is opened before opening the release switch 11, thus thus after the actuation of the moving contacts 7, 8.
  • FIG. 5d a fifth embodiment of the switching arrangement 1 is shown schematically. This embodiment is similar to the fourth embodiment, so that below all the differences are explained in detail.
  • FIG. 6 a sixth embodiment of the switching arrangement 1 is shown schematically. This embodiment is similar to the first embodiment, so that below all the differences are explained in detail.
  • the first winding 2 is formed as a control winding and the second winding 3 as a parent winding and the second tap 3.4 is arranged by way of example at one point in the lower third of the second winding 3, wherein the part between the taps 3.3 and 3.4 as a coarse stage winding or coarse stage 54 denotes becomes.
  • the switching arrangement 1 fulfills the function of a coarse selector.
  • the second tap 3.4 can also be arranged at any other point of the second winding 3.
  • FIG. 7 a seventh embodiment of the switching arrangement 1 is shown schematically. This embodiment is similar to the sixth embodiment, so that below all the differences are explained in detail.
  • the switching arrangement 1 comprises a fourth connection terminal 3.6, which can be connected to a third tap 3.5 of the second winding 3 between the first tap 3.3 and the second tap 3.4, preferably in the middle.
  • the fourth terminal 3.6 similar to the fifth embodiment, connected to ground potential 9 electrically connected series circuit of resistor 10, switch 11 and vacuum interrupter 12 is connected.
  • the resistor 10 serves as a polarity resistor when switching the switching arrangement 1.
  • the release switch 11 and / or vacuum interrupter 12 can also be omitted.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Slide Switches (AREA)
  • Keying Circuit Devices (AREA)

Claims (10)

  1. Dispositif de commutation (1), en particulier présélecteur destiné à un transformateur de réglage (4) qui comporte un premier enroulement (2) et un second enroulement (3) avec une première prise et une seconde prise (3.3, 3.4), comprenant :
    - une première borne de connexion (2.1) pouvant être reliée au premier enroulement (2),
    - une seconde borne de connexion (3.1) pouvant être reliée à la première prise (3.3),
    - une troisième borne de connexion (3.2) pouvant être reliée à la seconde prise (3.4),
    - un premier contact fixe, un second contact fixe, un troisième contact fixe et un quatrième contact fixe (5.1, 5.2, 5.3, 5.4),
    - un tube de commutation à vide (6),
    - un premier contact mobile (7) qui peut être sélectivement mis en contact avec le premier contact fixe ou avec le second contact fixe (5.1, 5.2),
    - un second contact mobile (8) qui peut être sélectivement mis en contact avec le troisième contact fixe ou avec le quatrième contact fixe (5.3, 5.4),
    dispositif dans lequel :
    - le second contact fixe et le quatrième contact fixe (5.2, 5.4) sont reliés à la seconde borne de connexion (3.1),
    - le premier contact fixe et le troisième contact fixe (5.1, 5.3) sont reliés à la troisième borne de connexion (3.2),
    - le premier contact mobile (7) est relié par l'intermédiaire du tube de commutation à vide (6) avec la première borne de commutation (2.1),
    - le second contact mobile (8) est relié à la première borne de connexion (2.1),
    - le tube de commutation à vide (6) est monté stationnaire ou fixe par rapport au premier contact mobile et au second contact mobile (7, 8).
  2. Dispositif de commutation (1) conforme à la revendication précédente, dans lequel :
    - le tube de commutation à vide (6) est monté stationnaire sur au moins une barre de contact (20) entre un support supérieur (22) et un support inférieur (23).
  3. Dispositif de commutation (1) conforme à la revendication précédente, dans lequel :
    - dans le support supérieur (22) est monté un levier basculant (31) permettant d'ouvrir et de fermer le tube de commutation à vide (6).
  4. Dispositif de commutation (1) conforme à la revendication précédente, dans lequel :
    - les contacts mobiles (7, 8) sont montés parallèlement l'un sur l'autre sur un tube de commutation (21),
    - le tube de commutation (21) est monté mobile en rotation,
    - les contacts mobiles (7, 8) effectuent un mouvement de pivotement sous l'action de la rotation du tube de commutation (21).
  5. Dispositif de commutation (1) conforme à la revendication précédente, dans lequel :
    - un disque à came (30) est monté sur le tube de commutation (21),
    - le disque à came (30) effectue un mouvement de pivotement sous l'action de la rotation du tube de commutation (21),
    - le disque à came (30) coopère mécaniquement avec le levier basculant (31) monté dans le support supérieur (22) et ouvre ou ferme le tube de commutation à vide (6).
  6. Dispositif de commutation (1) conforme à l'une des revendications précédentes, dans lequel :
    - chaque contact mobile (7, 8) comporte un boîtier (50) avec des doigts de contact (51) qui sont reliés à une première extrémité (52) de manière mécaniquement coulissante et électriquement conductrice à une bague conductrice de dérivation (24, 25) associée au contact mobile respectif (7, 8), et peuvent sélectivement être reliés à une seconde extrémité (53) au contact fixe respectif (5.1, 5.2, 5.3, 5.4).
  7. Dispositif de commutation (1) conforme à l'une des revendications précédentes dans lequel :
    - la première prise (3.3) et la seconde prise (3.4) sont respectivement positionnées à une extrémité du second enroulement (3).
  8. Dispositif de commutation (1) conforme à l'une des revendications précédentes, comprenant :
    - une quatrième borne de connexion (3.6) qui peut être reliée à une troisième prise (3.5) du second enroulement (3) située entre la première prise (3.3) et la seconde prise (3.4),
    - une résistance (10) qui est reliée à la quatrième borne de connexion (3.6).
  9. Dispositif de commutation (1) conforme à la revendication précédente, comprenant :
    - un disjoncteur (11) qui est relié en série sur la résistance (10) avec la quatrième borne de connexion (3.6) et/ou un tube de commutation à vide (12) qui est relié en série sur la résistance (10) avec la quatrième borne de connexion (3.6).
  10. Dispositif de commutation (1) conforme à la revendication précédente, réalisé sous la forme d'un présélecteur ou d'un transducteur ou d'un sélecteur à réglage grossier.
EP15753056.9A 2014-09-04 2015-08-21 Dispositif de commutation pour un transformateur de réglage, en particulier un présélecteur Active EP3189534B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014112763.3A DE102014112763A1 (de) 2014-09-04 2014-09-04 Schaltanordnung für einen Regeltransformator, insbesondere Vorwähler
PCT/EP2015/069240 WO2016034438A1 (fr) 2014-09-04 2015-08-21 Système de circuit pour un transformateur de réglage, notamment présélecteur

Publications (2)

Publication Number Publication Date
EP3189534A1 EP3189534A1 (fr) 2017-07-12
EP3189534B1 true EP3189534B1 (fr) 2019-06-05

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Application Number Title Priority Date Filing Date
EP15753056.9A Active EP3189534B1 (fr) 2014-09-04 2015-08-21 Dispositif de commutation pour un transformateur de réglage, en particulier un présélecteur

Country Status (10)

Country Link
US (1) US10692664B2 (fr)
EP (1) EP3189534B1 (fr)
JP (1) JP6611791B2 (fr)
KR (1) KR20170048522A (fr)
CN (1) CN106716578B (fr)
BR (1) BR112017003804A2 (fr)
DE (1) DE102014112763A1 (fr)
RU (1) RU2672856C2 (fr)
UA (1) UA123259C2 (fr)
WO (1) WO2016034438A1 (fr)

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EP4002409A1 (fr) * 2020-11-13 2022-05-25 Hitachi Energy Switzerland AG Commutateur à prise de réglage

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Publication number Publication date
RU2017111029A (ru) 2018-10-04
KR20170048522A (ko) 2017-05-08
RU2017111029A3 (fr) 2018-10-04
JP2017527996A (ja) 2017-09-21
DE102014112763A1 (de) 2016-03-10
RU2672856C2 (ru) 2018-11-20
BR112017003804A2 (pt) 2018-01-23
WO2016034438A1 (fr) 2016-03-10
EP3189534A1 (fr) 2017-07-12
UA123259C2 (uk) 2021-03-10
US20170236658A1 (en) 2017-08-17
US10692664B2 (en) 2020-06-23
JP6611791B2 (ja) 2019-11-27
CN106716578A (zh) 2017-05-24
CN106716578B (zh) 2019-08-20

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