EP3365902A1 - Ensemble enroulement - Google Patents

Ensemble enroulement

Info

Publication number
EP3365902A1
EP3365902A1 EP16805032.6A EP16805032A EP3365902A1 EP 3365902 A1 EP3365902 A1 EP 3365902A1 EP 16805032 A EP16805032 A EP 16805032A EP 3365902 A1 EP3365902 A1 EP 3365902A1
Authority
EP
European Patent Office
Prior art keywords
winding
disk
section
arrangement
conductor
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.)
Granted
Application number
EP16805032.6A
Other languages
German (de)
English (en)
Other versions
EP3365902B1 (fr
Inventor
Richard Sille
Tim-Felix Mai
Steffen Weinert
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 Energy Global GmbH and Co KG
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP3365902A1 publication Critical patent/EP3365902A1/fr
Application granted granted Critical
Publication of EP3365902B1 publication Critical patent/EP3365902B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/061—Winding flat conductive wires or sheets
    • H01F41/063—Winding flat conductive wires or sheets with insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/071—Winding coils of special form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/082—Devices for guiding or positioning the winding material on the former
    • H01F41/084—Devices for guiding or positioning the winding material on the former for forming pancake coils

Definitions

  • the invention relates to a winding arrangement having a number of spaced apart in the axial direction and electrically connected to form a series connection winding sections, each having a conductor which is wound from an inner end to an outer end of the respective winding section and thereby ⁇ ßert the winding portion in the radial direction magnification, at least one winding portion is electrically connected at its äuße ⁇ ren end to the inner end of the succeeding coil portion in the axial direction.
  • the invention further relates to a transformer and a coil or inductor with such a winding arrangement.
  • the above-mentioned winding arrangement is known, for example, from EP 2 251 877 B1.
  • the Wicklungsan ⁇ order shown there consists of a series connection of so-called disc windings, which are arranged at a distance from each other.
  • the outer end of each disc winding is connected to the inner end of each adjacent axially disposed disc winding.
  • a disadvantage is that the intermediate portion of the conductor which extends between the disc windings, not only the axial distance of the adjacent
  • Disk windings but also the radial extent of the winding must bridge.
  • the adjacent Scheibenwicklun- gene must therefore be arranged with a large distance from each other to make room for the said intermediate section.
  • so-called over windings from the Pra ⁇ tice are known.
  • camber windings the outer end of a disk winding is connected to the outer end of the axially succeeding disk winding, but this is wound from outside to inside. The change of the winding direction in the production, however, is complicated and leads to additional costs.
  • the object of the invention is to provide a winding arrangement of the type mentioned, which is inexpensive to produce and their winding sections are arranged me a relatively small distance from each other.
  • the invention solves this problem in that at least one subsequent winding section in the axial direction a
  • Stage region forms, in which its inner end is arranged in the radial direction at the height of the outer end of the Wicklungsab ⁇ section , with which it is electrically connected.
  • a coil assembly in which the connection of a winding section is achieved with the respective adjacent winding section by simply Kroep ⁇ fen of the conductor without the conductor must be carried out over longer distances away between adjacent Wicklungsabschnit ⁇ th.
  • all Windlungsabschnit ⁇ te the same direction of winding.
  • the winding direction thus does not change its scope of the invention.
  • the entire winding arrangement preferably consists of a single wound conductor. This continuous conductor is wound so that winding sections are formed, which are arranged successively in axi ⁇ aler direction. By spirally winding the conductor at certain intervals winding sections are formed.
  • the interconnects insulated from one another abut one another and, with increasing number of turns, increase the winding section in a direction which is referred to here as a radial direction.
  • a radial direction By winding are circumferential closed winding sections are formed, which limit an Ab ⁇ average area.
  • the section inner spaces of the winding sections are at least partially aligned in the axial direction, so that the stack of winding sections defines an inner contour, which is referred to below as the winding interior.
  • each winding section forms, with the exception of the first winding section of the series connection, an eccentric step area in which its inner winding layer has a greater distance from an imaginary central axis of the winding interior than outside level range.
  • This compared with the other portions of increased distance corresponds to the distance between the inner and externa ⁇ ßeren end of the adjacent winding section, thus corresponds in other words to the thickness of the winding. Therefore, the outer conductor need only laterally, ie in the axial tung RICH, are guided by the outer winding layer of the respective winding ⁇ portion to the inner winding layer of the adjacent winding portion.
  • the ⁇ rich so cranked in said conductor hencenbe then serves as an inner winding layer of said adjacent winding portion.
  • each winding section forms with the exception of the first winding ⁇ portion of the series circuit of a step portion.
  • the first winding section forms the so-called start of the winding arrangement, via which the winding arrangement is connected, for example, to the phase connection of a transformer or a choke.
  • the outer end of the first Wick ⁇ coupling portion is then in the step portion with the in- connected to the lower end of the subsequent winding section in the axial direction, so that this is then the first winding ⁇ section having a step area. This applies correspondingly to the subsequent winding sections in the axial direction.
  • each coil portion is a disk shape configured ticket ⁇ benwicklung.
  • the individual winding layers are wound precisely above one another, so that they extend disc-shaped virtually in a common layer or "Layer".
  • the coil assembly is formed even more compact.
  • each disc winding circumferentially ge ⁇ closed and defines a is interior portion. the portion inner spaces of the disc windings overlap in the stack, resulting from the juxtaposition of the disc winding in the axial direction, so that space for a leg of a transformer or inductor coreurge ⁇ represents.
  • each disk winding outside the step region forms an annular ring section.
  • the disk windings arranged next to one another in the axial direction define a circular-cylindrical interior, which has a center axis, wherein the first winding layer of each disk winding in the step area is at a greater distance from one another
  • each disk winding is arranged in alignment with the next but one disk winding.
  • the entire winding arrangement forms eccentric bulges only at two locations. This also simplifies the adjustment of the winding arrangement and their subsequent handling.
  • the angle ⁇ is 180 degrees.
  • the bulges lie opposite one another on different sides of the coil assembly. Deviating from this, the angle ⁇ is in the range of 10 to 30 degrees.
  • both bulges are arranged on the same side of the winding arrangement, for example in front. In this way it is possible to limit a Lei ⁇ terfreiraum, which serves to receive inlets or outlets.
  • any type of conductor can be used in the context of the invention.
  • the conductor is a drawn wire conductor or a flat foil conductor.
  • the conductor is a strip-shaped strip conductor.
  • a strip conductor material for example
  • the conductor or here the band-shaped band conductor is surrounded by an insulating layer at least in sections.
  • the Insulating layer may be an isolate ⁇ de lacquer layer or an insulating film, for example.
  • the Isolierfo ⁇ lie is placed in winding between successive wraps.
  • the band conductor is bent twice in the step area. Due to the double bending, the strip conductor can be guided in a particularly simple manner in the axial direction from the respective one winding section to the following winding section.
  • the winding arrangement is part of a transformer or a coil or choke.
  • FIG. 2 shows an embodiment of the invention
  • FIG. 3 shows a perspective view of a ⁇ exporting approximately example of the winding arrangement according to the invention
  • FIG. 4 shows the winding arrangement according to FIG. 3 in the production process
  • FIG. 5 shows a further embodiment of a winding arrangement OF INVENTION ⁇ to the invention in a partial view
  • FIG. 6 shows the winding arrangement according to FIG. 5 during the production process
  • FIG. 7 shows the winding arrangement according to FIG. 3 in a schematic plan view
  • Figure 8 show a further embodiment of an inventions ⁇ to the invention winding arrangement in a schematic representation.
  • FIG. 1 shows a winding arrangement 1 according to the prior art.
  • the winding assembly 1 shows a winding of a conductor 2, which is electrically insulated to the next layer, for example by interposing an insulating film or by an insulating paint.
  • Said conductor 2 is wound, so that the layers of the conductor 2 in a layer are spirally stacked. These spirally superimposed interconnects are referred to here as winding layers.
  • the first winding layer therefore limits a winding interior, which is referred to here as section interior 11.
  • the superposed winding layers lie one above the other in a layer. In other words, the winding layers form disk-shaped disk windings 3a, 3b, 3c... 3n as a winding section.
  • the winding sections are arranged one behind the other in the axial direction 4.
  • the disc windings 3a, 3b, 3c ... 3n are all arranged at a distance D from each other, wherein the distance D may be different.
  • the distance between the disk windings 3a and 3b is smaller than the distance between the disk windings 3b and 3c.
  • Each of said disc windings 3a, 3b, 3c ... 3n has an inner end 5a, 5b, 5c be ⁇ relationship as 5n and an outer end 6a, 6b, 6c relationship ⁇ example 6n.
  • FIG. 2 shows an embodiment of the winding assembly 8 according to the invention, the winding assembly 1 according to Figure 1 according to an electrical series circuit Wick ⁇ ment sections, here disc windings 3a, 3b, 3c ... 3n, is formed.
  • all the disk windings 3a, 3b, 3c... 3n have the same winding direction 7, that is, they are from the inner end 5a, 5b, 5c... 5n to the respective outer end 6a, 6b, 6c. 6n of each disc winding 3a, 3b,
  • the outer end 6a, 6b, 6c ... 6n-l of the disc windings 3a, 3b, 3c ... 3n-l are each connected to the inner end of another disc winding 3b, 3c directly or immediately following in the axial direction , 3d connected except for the last partial winding 3n of the series connection.
  • This is connected in the embodiment shown with its outer end 6n at a high voltage connection of the said transformer, not shown figuratively.
  • the inner end 5a of the first disc winding 3a is connected to another high voltage terminal of said transformer.
  • the disk winding 3b is raised relative to the disk winding 3a in the radial direction 9 in the region of the connection from 6a to 5b so that its inner end 5b is at the same "radial" height as the outer Therefore, in the context of the invention, the conductor 2 only has to be bent or bent in the axial direction 4 out of the "layer" of the disk winding 3a in order to form the layer of the to be transferred to adjacent disc winding 3b. There it forms the first winding layer.
  • the other Wick can ⁇ development were to be wound in the same direction by simply wrapping Next. A long conductor connection between the winding sections 3a, 3b, 3c... 3n as in FIG. 1 is therefore avoided in the context of the invention.
  • the winding direction 7 is the same for all disk windings 3a, 3b, 3c... 3n.
  • the disc windings 3a, 3b, 3c ... 3n can be arranged with a small distance D to each other, whereby the production of the winding assembly 8 remains cost-effective.
  • FIG. 3 shows the winding arrangement 8 according to FIG. 2 in a perspective view.
  • the ticket ⁇ benwicklungen 3a, 3b, 3c disposed in the axial direction 4, one behind the other at a small distance from each other.
  • the disk winding 3a faces the observer.
  • each disk winding 3 a, 3 b, 3 c... 3 n has a circumferentially closed configuration and thus a section interior 13 is delimited.
  • the ge ⁇ entire stack of disc windings 3a, 3b, 3c ... 3n, that is, the winding assembly 8 defines an internal cavity, which is referred to herein as inner space 14.
  • the interior 14 contains quasi the aligned portion interior 13th
  • the interior 14 is used to receive a magnetizable material which is adapted to guide a magnetic field with low magnetic resistance.
  • the individual ticket ⁇ benwicklept 3a, 3n 3b, 3c ... are not circular in plan view and, therefore, limit individually not have a circular section inner chamber 13. Rather, each disc winding 3a, 3b, 3c ... 3n has an eccentric staged portion 10a, 10b, 10c ... 10 ⁇ on, which has a larger distance to an imaginary central axis of the circular cylindrical interior space 14 of the winding assembly 8 ⁇ than the verblei ⁇ Bende portion of each disc winding 3a, 3b, 3c ... 3n, which follows in a plan view of a circular shape.
  • step region 10a is not arranged in alignment with the step region 10b of the disk winding 3b, which immediately follows the first disk winding 3a in the axial direction. Rather, the step portion 10b is circumferentially offset with respect to the step portion 10a, so that the two centers of the stepped portions 10a and 10b with each other be ⁇ xx the imaginary center axis of the inner space 14 of the winding assembly 8 to split an angle. Furthermore, it can be seen that the step region 10c of the next but one disk winding 3c is arranged in alignment with the step region 10a of the first disk winding 3a. This applies correspondingly to the step areas 10b and 10d. Each disk winding 3a, 3b, 3c ... 3n is therefore provided with its step portion 10a, 10b,
  • 10c ... 10 ⁇ are arranged in alignment with the respective next but one disk winding 3a, 3b, 3c... 3n, wherein the step sections 10a, 10b, 10c... 10n of disk windings 3a, 3b, 3c. are twisted against each other. Therefore, a total of two eccentric bulges 15, 16 can be seen in the winding arrangement 8, which are formed by the step areas 10a, 10c, 10e ... 10n-l or the step areas 10b, 10d, 10f ... 10n. If the numbered ticket ⁇ benwicklept 3a, 3b, 3c ... 3n by integers starting with 1, the a bulge 15 of the disc windings 3a, 3d, 3e ... having an even number and other bulge 16 of the 3n-l Disk windings 3b, 3d, 3f ... 3n formed with an odd number.
  • FIG. 4 illustrates in a perspective illustration during the manufacturing process how the conductor 2 of the disk winding 3b is bent in the step region 10b of the subsequent disk winding 3c to be wound. Furthermore, the step region 3a of the first disk winding can be seen, with which it is connected to the housing of the transformer on the side remote from the observer.
  • FIG. 5 shows in a partial view a further exemplary embodiment of the winding arrangement according to the invention in a perspective representation.
  • the wound to the pulley windings 3a, 3b, 3c ... 3n strip conductor 2 is formed in the example shown in comparison with Figure 3 strip conductor 2 slightly wider and thinner, the aluminum-made tape ⁇ conductor 2 is covered by an insulating film.
  • the step areas 10a, 10b, 10c... 10 ⁇ can be seen, wherein the respectively next-to-disk windings 3a,
  • FIG. 6 shows the winding arrangement according to FIG. 5 during the production process. Here it can be seen how the strip conductor 2 is bent during manufacture.
  • the conductor 2 illustrated in FIGS. 5 and 6 is designed to be bendable so that it can be bent twice in the step area 10.
  • FIG. 7 shows a further embodiment of the OF INVENTION ⁇ to the invention winding assembly 8. In this view it can be seen particularly well in that the disc windings are arranged in alignment to each other. In FIG. 7, it can be seen that the step regions 10 ⁇ and 10n-1 of the disk windings 3n and 3n-1 form an angle with one another with respect to the center of the circular-cylindrical internal space 14.
  • the circular cylindrical interior 14 is schematically indicated by a dashed circle ⁇ te. It can be seen that the interior 14 is not completely circular cylindrical. Rather, due to the angle between here 20 degrees, an additional routing space 19 is formed, which can serve to receive conductors, cables, terminals and the like, when, for example, an underwinding and a leg of a core extends in the circular cylindrical interior.
  • Figure 8 shows a further embodiment of the OF INVENTION ⁇ to the invention winding assembly 8, which differs from that shown in Figure 7 embodiment in that the angle which the step portions 10 ⁇ and 10n-l span with respect to the center axis of the circularly cylindrical inner space 14 MITEI ⁇ Nander, 180 ° is. It can be seen that in this embodiment, the inner contour of the disc windings together limit the circular cylindrical interior, so that a more compact winding arrangement without additional space, as shown in Figure 7, for cable management.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

La présente invention a pour objet un ensemble enroulement (8) ayant un certain nombre de segments d'enroulement (3a, 3b, 3c...3n) disposés écartés les uns des autres dans une direction axiale et reliés électriquement entre eux par la formation d'un câblage série, qui comprennent chacun un conducteur (2) qui est enroulé d'une extrémité interne (5a, 5b, 5c...5n) à une extrémité externe (6a, 6b, 6c...6n) du segment d'enroulement concerné (3a, 3b, 3c...3n) et qui agrandit le secteur d'enroulement (3a, 3b, 3c...3n) dans une direction radiale, au moins un segment d'enroulement (3a, 3b, 3c...3n) étant relié électriquement à son extrémité externe (6a, 6b, 6c...6n) à l'extrémité interne (5a, 5b, 5c...5n) du segment d'enroulement (3a, 3b, 3c...3n) suivant dans la direction axiale, qui peut être fabriqué de manière économique et dont les segments d'enroulement sont disposés à une distance relativement petite les uns des autres. Selon l'invention, au moins un segment d'enroulement (3a, 3b, 3c...3n) suivant dans la direction axiale forme une zone à paliers (10a, 10b, 10c...10n) dans laquelle son extrémité interne (5a, 5b, 5c...5n) est disposée dans la direction axiale à la hauteur de l'extrémité externe (6a, 6b, 6c...6n) du segment d'enroulement (3a, 3b, 3c...3n) avec lequel celui-ci est électriquement relié.
EP16805032.6A 2015-12-18 2016-11-23 Ensemble enroulement Not-in-force EP3365902B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015226097.6A DE102015226097B3 (de) 2015-12-18 2015-12-18 Wicklungsanordnung, Transformator und Spule
PCT/EP2016/078500 WO2017102269A1 (fr) 2015-12-18 2016-11-23 Ensemble enroulement

Publications (2)

Publication Number Publication Date
EP3365902A1 true EP3365902A1 (fr) 2018-08-29
EP3365902B1 EP3365902B1 (fr) 2021-02-17

Family

ID=57460478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16805032.6A Not-in-force EP3365902B1 (fr) 2015-12-18 2016-11-23 Ensemble enroulement

Country Status (8)

Country Link
US (1) US20180350510A1 (fr)
EP (1) EP3365902B1 (fr)
CN (1) CN108369854B (fr)
BR (1) BR112018012061A2 (fr)
CA (1) CA3006608C (fr)
DE (1) DE102015226097B3 (fr)
RU (1) RU2686721C1 (fr)
WO (1) WO2017102269A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018109565A1 (de) * 2018-04-20 2019-10-24 Block Transformatoren-Elektronik Gmbh Spulenanordnung
DE102018213661A1 (de) 2018-08-14 2020-02-20 Siemens Aktiengesellschaft Wicklungsanordnung mit Feldglättung und Armierung
CN222356079U (zh) * 2024-04-03 2025-01-14 比亚迪股份有限公司 绕组结构、定子组件、悬浮电机、电磁悬架及车辆

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188591A (en) * 1963-01-17 1965-06-08 Ite Circuit Breaker Ltd Transformer disk windings formed of a continuous conductor
US3467931A (en) * 1966-09-23 1969-09-16 Gen Electric Continuous disk winding and integral radial coil connector for electric transformer and the like
DE2628524C2 (de) * 1976-06-24 1982-06-09 Siemens AG, 1000 Berlin und 8000 München Hochspannungswicklung aus mehreren Teilspulen für Spannungswandler,
EP0605412B1 (fr) * 1991-09-26 1995-07-19 Siemens Aktiengesellschaft Procede de fabrication d'enroulements de bobines
CA2119879C (fr) * 1991-09-26 2001-07-24 Walter Muller Procede de fabrication d'enroulements
DE10323099B4 (de) * 2003-05-19 2005-08-11 Siemens Ag Verfahren zum Herstellen einer Wicklung
US7719397B2 (en) * 2006-07-27 2010-05-18 Abb Technology Ag Disc wound transformer with improved cooling and impulse voltage distribution
FI121098B (fi) * 2008-03-04 2010-06-30 Abb Technology Ag Laippakäämi
PL2251877T3 (pl) * 2009-05-14 2013-08-30 Abb Schweiz Ag Sposób wytwarzania uzwojenia krążkowego
JP5534442B2 (ja) * 2009-10-16 2014-07-02 スミダコーポレーション株式会社 コイル
JP5490186B2 (ja) * 2012-05-31 2014-05-14 株式会社エス・エッチ・ティ コイルの巻線方法及び変圧器
JP5761167B2 (ja) * 2012-12-05 2015-08-12 スミダコーポレーション株式会社 コイル巻線、コイル部品およびコイル巻線の製造方法

Also Published As

Publication number Publication date
CN108369854A (zh) 2018-08-03
BR112018012061A2 (pt) 2018-12-04
US20180350510A1 (en) 2018-12-06
WO2017102269A1 (fr) 2017-06-22
CA3006608A1 (fr) 2017-06-22
CN108369854B (zh) 2021-03-16
EP3365902B1 (fr) 2021-02-17
DE102015226097B3 (de) 2017-03-16
RU2686721C1 (ru) 2019-05-06
CA3006608C (fr) 2020-10-27

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