[go: up one dir, main page]

WO2019038958A1 - Machine électrique tournante - Google Patents

Machine électrique tournante Download PDF

Info

Publication number
WO2019038958A1
WO2019038958A1 PCT/JP2018/007317 JP2018007317W WO2019038958A1 WO 2019038958 A1 WO2019038958 A1 WO 2019038958A1 JP 2018007317 W JP2018007317 W JP 2018007317W WO 2019038958 A1 WO2019038958 A1 WO 2019038958A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
embedded
rotor core
central axis
magnetic pole
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.)
Ceased
Application number
PCT/JP2018/007317
Other languages
English (en)
Japanese (ja)
Inventor
松原　正克
久田　秀樹
佑将 松岡
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.)
Toshiba Corp
Toshiba Infrastructure Systems and Solutions Corp
Original Assignee
Toshiba Corp
Toshiba Infrastructure Systems and Solutions 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 Toshiba Corp, Toshiba Infrastructure Systems and Solutions Corp filed Critical Toshiba Corp
Publication of WO2019038958A1 publication Critical patent/WO2019038958A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • Embodiments of the present invention relate to a rotating electrical machine in which permanent magnets are provided on a rotor.
  • a permanent magnet type rotary electric machine using such a permanent magnet is being applied as a motor or a generator of a train or a car.
  • a permanent magnet type rotary electric machine includes a cylindrical stator and a cylindrical rotor rotatably supported inside the stator.
  • the rotor comprises a rotor core and a plurality of permanent magnets embedded in the rotor core.
  • a permanent magnet type rotary electric machine has been proposed that forms a magnetic circuit that can use reluctance torque in addition to magnet torque by arranging permanent magnets in the rotor so as to form a V shape that opens toward the outer peripheral surface side. ing.
  • a mounting space is small, and it is required to achieve high torque and high output in a limited space. Furthermore, it is desirable to be lighter if the torque is the same.
  • the present invention has been made in view of the above points, and its object is to provide a permanent magnet type rotary electric machine capable of reducing its weight while maintaining torque characteristics.
  • the rotating electrical machine includes a stator having a stator core and an armature winding, a shaft rotatable around a central axis, and a plurality of the shaft coaxially fixed to the shaft and arranged in the circumferential direction. And a rotor having a plurality of permanent magnets embedded in the rotor core and disposed for each of the magnetic poles.
  • the rotor core has an inner hole coaxially formed with the central axis and into which the shaft is fitted, and a plurality of magnetic pole central axes extending radially with respect to the central axis and passing through the centers of the magnetic poles.
  • Each of the embedded holes has an inner circumferential space and an outer circumferential surface extending to the inner circumferential side and the outer circumferential side of the permanent magnet in the loading region in which the permanent magnet is loaded and in the direction orthogonal to the magnetization direction of the permanent magnet.
  • the inner peripheral side gaps of the two embedded holes are located opposite to each other with the magnetic pole central axis interposed therebetween, and the outer peripheral side gaps of the two embedded holes are separated from the magnetic pole central axis And located adjacent to and adjacent to the outer circumferential air gap of the embedded hole of the adjacent magnetic pole.
  • the gap between the outer periphery of the buried hole and the outer gap of the buried hole of the adjacent magnetic pole is W1
  • the gap between the gap and the loading region of the buried hole is W2
  • the inner periphery of the gap and the buried hole Assuming that the distance from the air gap is W3 and the distance between the inner hole of the rotor core and the inner air gap of the embedded hole is W4, the rotor core is W1 ⁇ W2, W1 ⁇ W3, W1 ⁇ W4. Is formed.
  • FIG. 1 is a cross-sectional view showing a permanent magnet type rotary electric machine according to an embodiment.
  • FIG. 2 is an enlarged cross-sectional view of a part of a rotor of the permanent magnet type rotating electric machine.
  • FIG. 3 is a perspective view showing a rotor core and a permanent magnet of the rotary electric machine.
  • FIG. 4 is an enlarged cross-sectional view of a part of a rotor of a permanent magnet type rotary electric machine according to a modification;
  • FIG. 1 is a cross-sectional view of a permanent magnet type rotary electric machine according to an embodiment
  • FIG. 2 is a cross-sectional view showing a part of the rotor in an enlarged manner
  • FIG. 3 is a perspective view showing the rotor.
  • the rotary electric machine 10 is, for example, an inner rotor type rotary electric machine, and has an annular or cylindrical stator 12 supported by a fixed frame (not shown), and a central axis C inside the stator. And a rotor 14 rotatably supported coaxially with the stator 12.
  • the rotary electric machine 10 is suitably applied to, for example, a drive motor or a generator in a hybrid vehicle (HEV) or an electric vehicle (EV).
  • HEV hybrid vehicle
  • EV electric vehicle
  • the stator 12 includes a cylindrical stator core 16 and an armature winding 18 wound around the stator core 16.
  • the stator core 16 is configured by laminating a large number of annular magnetic steel plates such as a magnetic material such as silicon steel in a concentric manner.
  • a plurality of slots 20 are formed in the inner peripheral portion of the stator core 16. The plurality of slots 20 are arranged at equal intervals in the circumferential direction. Each slot 20 opens in the inner circumferential surface of the stator core 16 and extends radially from the inner circumferential surface. Each slot 20 extends over the entire axial length of the stator core 16.
  • the inner peripheral portion of the stator core 16 constitutes a plurality of (for example, 48 in the present embodiment) stator teeth 21 facing the rotor 14.
  • An armature winding 18 is embedded in the plurality of slots 20 and wound around each stator tooth 21. By passing a current through the armature winding 18, a predetermined flux linkage is formed on the stator 12 (the stator teeth 21).
  • the rotor 14 is fixed to a cylindrical shaft (rotary shaft) 22 rotatably supported at its both ends by bearings (not shown) and substantially at the axial center of the shaft 22
  • a cylindrical rotor core 24 and a plurality of permanent magnets 26 embedded in the rotor core 24 are provided.
  • the rotor 14 is coaxially disposed inside the stator 12 with a slight gap. That is, the outer peripheral surface of the rotor 14 faces the inner peripheral surface of the stator 12 with a slight gap.
  • the rotor core 24 has an inner hole 25 formed coaxially with the central axis C.
  • the shaft 22 is inserted and fitted in the bore 25 and extends coaxially with the rotor core 24.
  • the rotor core 24 is configured as a laminated body in which a large number of magnetic materials, for example, annular electromagnetic steel plates 24 a such as silicon steel, are concentrically stacked.
  • the rotor 14 is set to a plurality of magnetic poles, for example, eight poles.
  • an axis extending radially and radially through the center of each magnetic pole relative to the central axis C is electrically and magnetically 90 ° with respect to the d axis (magnetic pole central axis) and the d axis.
  • the spaced apart axes are referred to as the q-axis.
  • the direction in which the flux linkage formed by the stator 12 easily flows is referred to as the q-axis.
  • the d axis and the q axis are provided alternately in the circumferential direction of the rotor core 24 and in a predetermined phase.
  • the one magnetic pole portion of the rotor core 24 refers to a region between q axes (a circumferential angle region of 1 ⁇ 8 circumference). For this reason, the rotor core 24 is configured to have eight poles (magnetic poles). The circumferential center of one magnetic pole is the d axis.
  • embedded holes 34 magnet embedded holes having a shape corresponding to the shape of permanent magnet 26 are formed on both sides of each d axis, and a line Is located in Permanent magnets 26 are respectively disposed in the embedded holes 34.
  • Each embedding hole 34 extends through the rotor core 24 in the axial direction.
  • the embedded holes 34 have a substantially rectangular cross-sectional shape and are each inclined with respect to the d-axis.
  • the two embedded holes 34 are arranged, for example, substantially in a V-shape. That is, the inner circumferential ends of the two embedding holes 34 are respectively adjacent to the d-axis and face each other with a slight gap.
  • a narrow magnetic path narrowing portion (bridge portion) 36 is formed between the inner peripheral side ends of the two embedded holes 34.
  • the outer circumferential ends of the two embedded holes 34 are spaced apart from the d-axis along the circumferential direction of the rotor core 24 and located near the outer circumferential surface of the rotor core 24 and near the q-axis. Thereby, the end on the outer peripheral side of the embedded hole 34 is opposed to the outer peripheral end of the embedded hole 34 of the adjacent magnetic pole with the q axis interposed therebetween.
  • a narrow magnetic path narrowing portion (bridge portion) 38 is formed between the outer peripheral side end of each embedded hole 34 and the outer peripheral edge of the rotor core 24.
  • the two embedding holes 34 are arranged such that the distance from the d-axis gradually increases from the inner circumferential end toward the outer circumferential end.
  • each embedded hole 34 has a rectangular loading area 34 a corresponding to the cross-sectional shape of the permanent magnet 26 and the longitudinal direction of this loading area 34 a (direction perpendicular to the magnetization direction of the permanent magnet 26).
  • Two air gaps inner space side space 34b and outer space side space 34c) extending to both sides, and a pair of protruding into the embedded hole 34 from the inner peripheral end face of the embedded hole 34 at both ends in the longitudinal direction of the loading region 34a.
  • a locking projection 34d a locking projection 34d.
  • the inner space 34 b and the outer space 34 c function as a flux barrier that suppresses the leakage of magnetic flux from the longitudinal ends of the permanent magnet 26 to the rotor core 24.
  • a plurality of air gap holes (cavity portions) 30 are formed in the rotor core 24.
  • the air holes 30 extend through the rotor core 24 in the axial direction, respectively.
  • the air gap holes 30 are located approximately at the radial center of the rotor core 24 on the q-axis, respectively, and are provided between two embedded holes 34 of adjacent magnetic poles.
  • the void hole 30 has a polygonal, for example, triangular cross-sectional shape.
  • the cross section of the air gap hole 30 has one side 30a orthogonal to the q-axis, and two sides 30b and 30c facing each other at intervals in the buried hole 34.
  • Each air gap hole 30 functions as a flux barrier that makes it difficult to pass the magnetic flux, and regulates the flow of the interlinking magnetic flux of the stator 12 and the flow of the magnetic flux of the permanent magnet 26. Further, by forming the air gap hole 30, the weight reduction of the rotor core 24 can be achieved.
  • the permanent magnet 26 is loaded in the respective embedding holes 34 and embedded in the rotor core 24.
  • the permanent magnet 26 is formed in, for example, an elongated flat plate having a rectangular cross section, and has a length L1 substantially equal to the axial length of the rotor core 24.
  • the permanent magnet 26 may be configured by combining a plurality of divided magnets in the axial direction (longitudinal direction), in which case the total length of the plurality of magnets is approximately equal to the axial length of the rotor core 24 It is formed in the same way.
  • Each permanent magnet 26 is embedded over substantially the entire length of the rotor core 24.
  • the magnetization direction of the permanent magnet 26 is orthogonal to the front and back surfaces of the permanent magnet 26.
  • the permanent magnet 26 is loaded in the loading area 34 a of the embedded hole 34 and fixed to the rotor core 24 by an adhesive or the like. Further, in the permanent magnet 26, a pair of corner portions respectively abut on the locking convex portion 34d. Thereby, the permanent magnet 26 is positioned in the loading area 34a.
  • Two permanent magnets 26 located on both sides of each d-axis are arranged substantially in a V-shape. That is, the two permanent magnets 26 are arranged such that the distance from the d-axis gradually increases from the inner circumferential end toward the outer circumferential end.
  • Two permanent magnets 26 located on both sides of each d axis that is, two permanent magnets 26 constituting one magnetic pole, are arranged such that the magnetization directions are the same.
  • two permanent magnets 26 located on both sides of each q axis are arranged such that the magnetization directions are opposite to each other.
  • the rotary electric machine 10 is a single layer distributed winding with eight poles (four pole pairs) and 48 slots, in which the front and back of the N pole and the S pole of the permanent magnet 26 are alternately arranged for each adjacent magnetic pole 40.
  • the distance between the outer peripheral side air gaps 34c of two adjacent magnetic poles is W1
  • the distance between the air gap holes 30 and the loading region 34a of the embedded holes 34 is W2
  • the inner peripheries of the air gap holes 30 and the embedded holes 34 Let W3 be the distance from the side air gap 34b, and W4 be the distance between the shaft 22, ie, the inner hole 25 of the rotor core 24 and the inner space 34b of the embedded hole 34.
  • the rotor core 24 is formed to satisfy the relationship of W1 ⁇ W2, W1 ⁇ W3, and W1 ⁇ W4.
  • the interval W1 is the narrowest and forms the narrowest magnetic path.
  • W2 ⁇ W4 and W3 ⁇ W4, and a magnetic path with the widest distance W4 is formed between the inner space 34b of the embedded hole 34 and the inner hole 25.
  • the intervals W2 and W3 may be either W2 ⁇ W3 or W3 ⁇ W2, and the width of the magnetic path formed between the embedded hole 34 and the air gap hole 30 is larger than the interval W1 and larger than the interval W4. It should be small.
  • the rotary electric machine 10 when the armature winding 18 is energized, the flux linkage from the armature winding 18 and the generated magnetic field of the permanent magnet 26 The interaction causes the rotor 14 to rotate about the shaft 22. In addition to the magnet torque caused by the attractive force and the repulsive force generated between the stator 12 and the permanent magnet 26, the rotary electric machine 10 uses the total torque of the reluctance torque to minimize the magnetic path through which the magnetic flux passes. It is rotationally driven. The rotary electric machine 10 can output electrical energy to be supplied as electrical energy as mechanical energy from the shaft 22 integrally rotating with the rotor 14.
  • the intervals W1, W2, W3 and W4 of each part of the rotor 14 are respectively magnetic flux Corresponds to the width of the magnetic path through which By setting these intervals to W1 ⁇ W2, W1 ⁇ W2 and W1 ⁇ W4, that is, by narrowing the interval W1 of the outer peripheral side air gaps 34c of the embedded holes 34 of the adjacent magnetic poles 40, the magnetic path of this portion The width of the As a result, the flow of the magnetic flux can be restricted, the leakage of the magnetic flux to the adjacent magnetic pole can be prevented, and the magnetic flux can efficiently flow in the magnetic path on the magnetic pole central axis (d axis) side.
  • the magnetic flux flowing from the armature winding 18 into the rotor 14 and the magnetic flux of the permanent magnet 26 can effectively contribute to torque generation, and torque characteristics of the rotary electric machine can be improved. Furthermore, the weight of the rotor core 24 can be reduced and the weight reduction of the rotary electric machine 10 can be contributed by providing a plurality of the air gaps 30 to set the above-described interval, that is, the magnetic path width. By setting the intervals W1 ⁇ W2, W1 ⁇ W2 and W1 ⁇ W4, the substantially triangular air gap 30 can be maximized while minimizing the reduction in torque due to the reduction in the q-axis magnetic flux. As described above, according to the present embodiment, a permanent magnet type rotary electric machine capable of reducing the weight while maintaining the torque characteristics can be obtained.
  • the present invention is not limited to the above-described embodiment as it is, and at the implementation stage, the constituent elements can be modified and embodied without departing from the scope of the invention.
  • various inventions can be formed by appropriate combinations of a plurality of constituent elements disclosed in the above embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, components in different embodiments may be combined as appropriate.
  • the number of magnetic poles of the rotor, the size, the shape, and the like are not limited to the above-described embodiment, and can be variously changed according to the design.
  • the cross-sectional shape of the air gap hole 30 is not limited to a triangle, and various shapes can be selected.
  • the air gap hole 30 may be a hole having a pentagonal cross sectional shape.
  • the void hole 30 may have a shape having at least two sides 30 a and 30 b facing each other at predetermined intervals in the embedding hole 34.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

La présente invention concerne une machine électrique tournante pourvue d'un stator (12) et d'un rotor (14). Le rotor comprend un noyau de fer de rotor (24) et de multiples aimants permanents (26) intégrés dans le noyau de fer de rotor et formant de multiples pôles magnétiques. Le noyau de fer de rotor comprend deux trous d'insertion (34) qui sont disposés sur les deux côtés de chaque axe central de pôle magnétique (d) et dans lesquels les aimants permanents sont chargés, et de multiples entrefers (30) qui sont disposés entre des axes centraux de pôles magnétiques adjacents et qui font face aux trous d'intégration à un certain intervalle. En définissant W1 comme l'intervalle entre l'entrefer côté périphérie externe (34c) d'un trou d'insertion et l'entrefer côté périphérie externe (34c) du pôle magnétique adjacent, W2 comme l'intervalle entre l'entrefer et la région de chargement du trou d'insertion, W3 comme l'intervalle entre l'entrefer et l'entrefer côté périphérie interne (34b) du trou d'insertion, et W4 comme l'intervalle entre le trou interne du noyau de fer de rotor et l'entrefer côté périphérie interne (34b), le noyau de fer de rotor est formé de telle sorte que W1 ≤ W2, W1 ≤ W3 et W1 ≤ W4.
PCT/JP2018/007317 2017-08-22 2018-02-27 Machine électrique tournante Ceased WO2019038958A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-159789 2017-08-22
JP2017159789A JP6755840B2 (ja) 2017-08-22 2017-08-22 回転電機

Publications (1)

Publication Number Publication Date
WO2019038958A1 true WO2019038958A1 (fr) 2019-02-28

Family

ID=65438667

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/007317 Ceased WO2019038958A1 (fr) 2017-08-22 2018-02-27 Machine électrique tournante

Country Status (2)

Country Link
JP (1) JP6755840B2 (fr)
WO (1) WO2019038958A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019109714A1 (de) * 2019-04-12 2020-10-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rotor einer elektrischen Maschine
CN113036965A (zh) * 2020-12-31 2021-06-25 上海大学 降低全钕铁硼永磁电机高速下磁钢涡流损耗的方法及电机结构
WO2022017712A1 (fr) * 2020-07-22 2022-01-27 Valeo Siemens Eautomotive Germany Gmbh Tôle de rotor, noyau de rotor stratifié, rotor, machine électrique et véhicule
WO2023135693A1 (fr) * 2022-01-13 2023-07-20 株式会社 東芝 Rotor et machine électrique tournante

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007104888A (ja) * 2005-09-07 2007-04-19 Toshiba Corp 回転電機
WO2009069575A1 (fr) * 2007-11-28 2009-06-04 Kabushiki Kaisha Toshiba Rotor de machine rotative
JP2010178535A (ja) * 2009-01-30 2010-08-12 Toshiba Industrial Products Manufacturing Corp 永久磁石式回転電機の回転子及びその回転電機
CN102355071A (zh) * 2011-09-28 2012-02-15 苏州和鑫电气股份有限公司 内置式永磁电机转子和包含该转子的电机
JP2013042596A (ja) * 2011-08-16 2013-02-28 Toshiba Corp 永久磁石型回転電機およびその製造方法
JP2016063650A (ja) * 2014-09-18 2016-04-25 株式会社東芝 永久磁石型回転電機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007104888A (ja) * 2005-09-07 2007-04-19 Toshiba Corp 回転電機
WO2009069575A1 (fr) * 2007-11-28 2009-06-04 Kabushiki Kaisha Toshiba Rotor de machine rotative
JP2010178535A (ja) * 2009-01-30 2010-08-12 Toshiba Industrial Products Manufacturing Corp 永久磁石式回転電機の回転子及びその回転電機
JP2013042596A (ja) * 2011-08-16 2013-02-28 Toshiba Corp 永久磁石型回転電機およびその製造方法
CN102355071A (zh) * 2011-09-28 2012-02-15 苏州和鑫电气股份有限公司 内置式永磁电机转子和包含该转子的电机
JP2016063650A (ja) * 2014-09-18 2016-04-25 株式会社東芝 永久磁石型回転電機

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019109714A1 (de) * 2019-04-12 2020-10-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rotor einer elektrischen Maschine
WO2022017712A1 (fr) * 2020-07-22 2022-01-27 Valeo Siemens Eautomotive Germany Gmbh Tôle de rotor, noyau de rotor stratifié, rotor, machine électrique et véhicule
CN113036965A (zh) * 2020-12-31 2021-06-25 上海大学 降低全钕铁硼永磁电机高速下磁钢涡流损耗的方法及电机结构
WO2023135693A1 (fr) * 2022-01-13 2023-07-20 株式会社 東芝 Rotor et machine électrique tournante
JP7318138B1 (ja) * 2022-01-13 2023-07-31 株式会社東芝 回転子および回転電機

Also Published As

Publication number Publication date
JP2019041450A (ja) 2019-03-14
JP6755840B2 (ja) 2020-09-16

Similar Documents

Publication Publication Date Title
JP7293371B2 (ja) 回転電機の回転子
US11183893B2 (en) Rotary electric device
CN108352744B (zh) 永磁型马达
JP5382156B2 (ja) 回転電機
US20060284507A1 (en) Axial air gap-type electric motor
JP6539004B1 (ja) 回転子および回転電機
JP3280896B2 (ja) 永久磁石式リラクタンス型回転電機
JP2020022335A (ja) 回転電機の回転子
JPWO2013129022A1 (ja) ハイブリッド励磁式回転電機
CN104011972A (zh) 混合动力励磁式旋转电机
US11837919B2 (en) Rotary electric machine
CN111466066B (zh) 旋转电机
WO2019038958A1 (fr) Machine électrique tournante
KR100680201B1 (ko) 영구자석형 모터
JP6466612B1 (ja) 回転電機
JP4500843B2 (ja) アキシャルギャップ型モータ
JP2022105865A (ja) 回転子およびその回転子を備えた回転電機
JP2020182358A (ja) 回転電機の回転子
JP2008187802A (ja) 回転電機の回転子及び回転電機
JP2014050253A (ja) 永久磁石回転電機用ロータ及び永久磁石回転電機
JP7224986B2 (ja) 回転電機
WO2023132011A1 (fr) Rotor
JP2021048682A (ja) 回転子
JP2021027742A (ja) 回転子

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18849254

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18849254

Country of ref document: EP

Kind code of ref document: A1