EP3384583A1 - Rotor device for an electric motor and/or generator, rotor, motor comprising such a rotor device, and production method - Google Patents
Rotor device for an electric motor and/or generator, rotor, motor comprising such a rotor device, and production methodInfo
- Publication number
- EP3384583A1 EP3384583A1 EP16801951.1A EP16801951A EP3384583A1 EP 3384583 A1 EP3384583 A1 EP 3384583A1 EP 16801951 A EP16801951 A EP 16801951A EP 3384583 A1 EP3384583 A1 EP 3384583A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- cover element
- net
- dad
- magnets
- 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.)
- Withdrawn
Links
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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- 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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
Definitions
- the invention relates to a rotor device for an electric motor and / or generator according to the preamble of claim 1. Furthermore, the invention relates to a rotor and a motor with such a rotor device and a manufacturing method for such a rotor device.
- An electric motor refers to an electromagnetic transducer that converts electrical energy into mechanical energy.
- a physical principle is exploited, wherein a current-carrying conductor generates a magnetic field and different magnetic fields exert forces on each other. These forces are also called Lorentz forces.
- An electric motor which can generate a rotational movement, generally has a rotatable component, also referred to as a rotor, and a fixed or fixed component, also referred to as a stator.
- independent magnetic fields are generated in the rotor and in the stator, wherein the magnetic fields of at least one of the components are generated by one or more current-carrying coils. It is also possible to generate one of the magnetic fields by permanent magnets or field magnets. These will / will z. B. used in a rotor in corresponding receiving pockets.
- a rotor device of the type mentioned is known for example from DE 20 2012 103 438 Ul.
- the previously known rotor device comprises a
- Rotor core of several axially interconnected rotor laminations wherein the rotor laminated core has receiving pockets in which permanent magnets are accommodated.
- the permanent magnets are held in the receiving pockets by a casting material.
- On one side are the
- Receiving pockets or the permanent magnets covered by a support ring Receiving pockets or the permanent magnets covered by a support ring.
- the controller needs information about the current orientation of the rotor. This is usually done via a pole wheel, which is attached to the front end of the rotor. Care must be taken to ensure that the rotor is exactly aligned with the rotor, so that correct information about the current position of the rotor is transmitted to the controller.
- the attachment and alignment of a pole wheel requires additional manufacturing steps, which increases the production costs of such rotor devices, in particular in mass production.
- the object of the invention is to provide an improved rotor device, which allows a simple and cost-effective attachment of a pole wheel. It is another object of the invention to provide a rotor with a motor with such a rotor device and a manufacturing method.
- the invention is based on the idea of a rotor device for a
- Electric motor and / or generator to provide a rotor body and a plurality of magnets, wherein the rotor body arranged a rotor shaft receiving and a plurality of coaxial with the rotor shaft receiving
- Magnetic recordings and the magnets are arranged in the magnetic recordings.
- the magnets are by means of one in the magnetic recordings injected plastic mass in the rotor body, in particular in the magnetic receptacles, rigidly positioned and fastened, wherein the plastic mass forms at least one cover element which covers openings of the magnetic recordings at least partially.
- the cover element has at least one pole wheel centering means and / or at least one pole wheel alignment means.
- the injected plastic results in the advantage of cost-effective process-reliable and permanent fixation of the block magnets in the rotor laminated core. At the same time up to two annular faces or
- Covering elements are formed on the at least one ball bearing on block, i. with press fit, can be pressed. There are one
- the Polradzentri mecanicsmittel serves to center a Polrads on the
- the pole wheel alignment means serves to align the pole wheel to provide correct commutation. This prevents an angular offset of the magnetic poles between the active rotor magnet and the pole wheel, which can lead to erroneous commutations.
- the rotor position can be interrogated by three switching Hall sensors via the orientation of the pole wheel.
- a rotor lamination stack usually designates a rotor body with a multiplicity of sheet-metal disks or layers which are arranged together and form the rotor body one on top of the other.
- the metal sheets are usually electrically isolated from each other by means of paint or laminate to pass through a
- the Polradzentri mecanicsstoff is integral as an insulating ring on
- the insulating ring has the advantage of being easy and inexpensive to produce.
- the insulating ring can be integrally formed during the formation of the cover member.
- Polradzentri mecanicsmittel is in particular an encapsulation around the rotor shaft. It has also been found to be advantageous that the insulating ring can preferably serve both as Polradzentri réellesstoff and as Polradaus exercisessstoff when z. B. the outer surface is formed with alignment elements. This is the case when the insulating ring is not a body of revolution, but has indentations and / or edges as in a hexagonal screw. As a result, a pole can only be mounted in a specific orientation on the insulating ring.
- the Polradaus therapiessmittel can be integrally formed as at least one pin element on the cover element.
- a pin element is simple and inexpensive to produce and can be integrally formed in particular during the formation of the cover member.
- the cover element has a bore that is congruent to the rotor shaft receptacle.
- Rotor shaft and cover element is created.
- the cover element is disc-shaped and / or annular.
- the disc shape is a circular and flat plane formed, no imbalance and only a small adds additional weight to the rotor.
- the ring shape has the same advantages as the disc shape and has even less weight.
- the cover element has a toothed edge, wherein each tooth of the toothed edge is in each case arranged between two magnetic receptacles. Due to the teeth, there is good contact between the plastic compound injected into the rotor and the cover element. Thus, the attachment of the cover member on the rotor and the injected plastic material is reinforced and improved. In addition, can
- the rotor body is in one piece or in several pieces, in particular as a rotor laminated core, formed, wherein the magnetic recordings completely absorb the magnets.
- Iron cores made of solid material as a rotor body may indeed be cheaper, but have the disadvantage of generators and machines, especially in transformers, that under the influence of variable
- a multi-piece iron core in particular a laminated core, z.
- a rotor body avoids this problem, since the pieces or sheets are electrically insulated from each other by means of a varnish or laminate and thus no or only small
- the rotor device according to the invention forms with a in the
- Rotor shaft mounted rotor shaft and a flywheel, which is connected to the cover member, a rotor.
- the present invention relates to a motor with an inventive
- Rotor device in particular with a previously mentioned rotor.
- the inventive manufacturing method of a rotor device according to the invention comprises the following steps:
- Cover element is formed, the openings of the magnetic recordings at least partially covers.
- This method has the advantage that the process steps can be implemented easily and thus on a large scale in businesses. Furthermore, the
- the magnets when injecting a plastic mass, are encapsulated in such a way that the magnets are fixed within the magnetic recordings. It is preferably observed that the magnets have no play in the recordings and can not be solved or fall out of these. Thus, the magnets can be either partially or completely encapsulated. In a partial encapsulation z. B. only the side surfaces of the magnet in particular partially in contact with the plastic, while the top and / or bottom of the magnets is completely or partially free / are. The magnets or the end faces of the rotor are therefore partially free and form corresponding indentations or edges, since these subregions are occupied by tool parts during the injection of the plastic.
- the injected plastic can under
- Pre-positioning ensures that the magnets are correctly aligned and fixed in a specific position by means of the plastic.
- the magnetic or rotating field generated by the magnets is thus formed uniformly and uniformly, except for its alternating polarity.
- a pole wheel centering means and / or a pole wheel alignment means are preferably formed on the cover element. Furthermore, a pole wheel is preferably placed, centered and / or positioned on the pole wheel centering means and / or on the pole wheel alignment means.
- the pole wheel is preferably connected to the pole wheel centering means and / or the pole wheel alignment means by ultrasonic welding, hot pressing and / or gluing.
- the pole wheel is molded directly onto the cover element by means of a two-component injection molding process.
- Liquid crystal polymers consist, include this or be made of it. Especially due to the strong anisotropic geometry of the FKP, a strong intermolecular cohesion is created, resulting in high
- the rotor shaft before or after the fixation of the magnets in the receptacles by means of the plastic and the
- the invention in particular the rotor device according to the invention and the method according to the invention, are particularly suitable for use in BLDC motors, i. H. brushless DC motors.
- the invention is suitable for use in brushless DC motors, which are used to drive pumps for Olêt, but also for the promotion of other, viscous media.
- a particularly advantageous application results for brushless DC motors in oil pumps of motor vehicles.
- Figure 1 is a perspective view of a rotor body of the rotor device according to the invention according to a preferred embodiment with inserted magnets and rotor shaft.
- Fig. 2 shows a rotor device according to the invention according to a preferred
- Fig. 3 shows the rotor device of Fig. 2 with Polradzentri mecanicsmittel
- FIG. 4 shows a rotor with the rotor device according to the invention from FIG. 3;
- Fig. 5a is another perspective view of the rotor of Fig. 4;
- Fig. 5b shows the rotor of Fig. 5a, with attached and fixed pole wheel
- Fig. 6 shows an arrangement of a rotor of Fig. 5b in one
- Rotor bearing holder in particular in a printed circuit board with
- Fig. 7 is a cross section of a BLDC motor with the arrangement of Fig. 6 and a stator;
- a rotor device according to the invention according to a preferred
- FIG. 8b shows the rotor device from FIG. 8a with an attached pole wheel
- Fig. 9a a rotor according to the invention according to a preferred
- Fig. 9b is a side view of the rotor of Fig. 9a.
- FIG. 1 shows a perspective view of a cylindrical rotor body 2 having a plurality of disks with six magnets 3 inserted in the magnet receivers 5 and one inserted in a rotor shaft receiver 4 Rotor shaft 15.
- six holes 18 are concentric around the
- Rotor shaft receptacle 4 is formed, which, like the rotor shaft receptacle 4 and the magnetic receptacles 5, from the top to the bottom of the rotor body 2 réellecken.
- the rotor body 2 has three planes of symmetry, wherein the common cutting line of all three planes forms a rotor shaft axis.
- the rotor shaft axis extends centrally in the rotor shaft 15 and forms its
- the magnets 3 are cuboid and have a rectangular cross-section. The six
- Magnetic recordings 5 essentially form at the edge of the rotor body 2
- Circular sectors with a maximum angle of 60 °, each sector being bounded by an imaginary chord.
- Adjacent magnetic recordings 5 are each delimited from one another by a wall 17. Between one
- Magnetic receptacle 5 and the rotor shaft receptacle 4 is in each case a bore 18 is arranged.
- the holes 18 serve as an adjustment and receiving means for an injection molding tool to the plastic in position in and on the
- FIG. 2 shows the rotor body 2 from FIG. 1 with an additionally formed cover element 7, in particular as rotor device 1 according to the invention with rotor shaft 15.
- the cover element 7 is disc-shaped on the upper side of the rotor body 2 and, like the rotor body 2, has the same three Symmetry axes or planes on. Three holes 21 are on the
- Cover element 7 concentric to the rotor axis at 120 ° angle to each other and congruent to three holes of the rotor body 2 is formed.
- the cover element 7 additionally has a toothed edge 10 with six teeth 11 and six recesses 19, wherein the teeth 11 are arranged directly above the intermediate walls (17, not visible) of the magnetic receptacles 5 and extend to the edge of the rotor body 2.
- the recesses 19 are each semicircular between two teeth 11, in particular such that a part of the top of a magnet 3 is visible.
- a further cover member 20 is arranged, which is like the first cover member 7 formed of plastic, but has no toothed edge.
- Fig. 3 shows the rotor device 1 of Fig. 2 with an additionally molded Polradzentri mecanicsstoff in the form of an insulating ring 12 and a
- the pins 13 are bolt or cylindrical and arranged concentrically around the rotor axis at an angle of 120 ° to each other.
- the lower cover member 20 has a toothed edge which is congruent with the edge 10 of the upper cover member 7.
- FIG. 4 shows the rotor device 1 from FIG. 3 with a mounted pole wheel 16, in particular as a rotor 14 according to the invention.
- the pole wheel 16 is disc-shaped or annular and has the same diameter as the rotor body 2.
- the pole wheel has a center formed hole or breakthrough, in which the rotor shaft 15 is used with the insulating ring 12 for centering the flywheel.
- three holes 22 are formed in the flywheel, in which all three pin elements 13 are used to align the flywheel.
- FIG. 5 a shows a further perspective view of the rotor 14 from FIG. 4.
- the insulating ring 12 and the pin elements 13 have a height that is greater than the thickness of the pole wheel 16.
- Fig. 5b shows the rotor 14 of Fig. 5a, wherein the patch wheel is fixed by deformed pin members 13.
- the deformation of the pin elements 13 takes place by ultrasonic welding or hot pressing. In this case, the pin elements 13 lose their original height and form similar to a rivet a head of the rotor 16 to the rotor device, in particular to the
- Fig. 6 shows an arrangement of a rotor 14 of Fig. 5b in one
- Rotor bearing holder 23 in particular in a printed circuit board or measuring electronics 25 with Hall sensors 26.
- the rotor 14 is rotatably mounted in the holder 23.
- electrical connections 24 are arranged to receive one or more control signals and to send one or more measuring signals.
- the circuit board 25 On the underside of the holder 23, the circuit board 25 as
- Hall sensors 26 are arranged at 60 ° to each other concentrically about the rotor axis.
- the twelve at the bottom of the bracket 23 concentric at the edge arranged electrical contacts serve the power supply of the electric coils of the stator described below.
- Fig. 7 shows a cross section of a BLDC electric motor with the arrangement of Fig. 6 and a stator 27.
- the stator is fixed to the holder 23 and has a certain number of coils which generate a magnetic field to the Rotor 14, in particular the rotor device, to set in rotation.
- the rotor 14, in particular the rotor shaft 15, is rotatably attached to the holder 23 by means of a ball bearing 28, the ball bearing having a plurality of balls 29.
- Good recognizable is the injected plastic compound, which forms, inter alia, the cover member 7, in a bore of the
- Rotor body 2 extends and missing in the opposite bore 18.
- the pole wheel 16 is spaced from the bracket 23 to prevent friction.
- Fig. 8a shows a rotor device 1 according to the invention with a rotor shaft 15 and a circular cover member 7, which is formed in comparison to the cover member of Fig. 2 without toothed edge. Otherwise, the cover elements 7 of Fig. 8a and Fig. 2 are identical. Good recognizable is the injected into the magnetic receptacles 5 plastic mass 6, which is arranged between each wall 17 and each magnet 3. It is the
- Plastic compound 6 integrally formed with the cover member 7.
- the diameter of the cover member 7 is formed such that the magnets 3 are partially covered.
- Fig. 8b shows the rotor device 14 of Fig. 8a with a mounted pole wheel 16, wherein the pin members 13 of the cover member 7 inserted into the holes 22 of the flywheel 16, but not yet formed.
- FIG. 9 a shows a rotor 14 according to the invention according to FIG. 5 b with a ball bearing 28 placed on the rotor shaft 15.
- the diameter of the ball bearing 28 is smaller than the diameter of the pole wheel 16 or of the rotor body 2.
- Fig. 9b shows a side view of the rotor 14 of Fig. 9a. Good to see the pin elements 13, which are already formed as soon as the ball bearing 28 is placed on the shaft 15. Furthermore, the ball bearing 28 is spaced from the flywheel 16 to allow free rotation of the rotor assembly
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015121102.5A DE102015121102B4 (en) | 2015-12-03 | 2015-12-03 | Rotor device for an electric motor and / or generator, rotor and motor with such a rotor device and manufacturing method |
PCT/DE2016/200507 WO2017092741A1 (en) | 2015-12-03 | 2016-11-09 | Rotor device for an electric motor and/or generator, rotor, motor comprising such a rotor device, and production method |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3384583A1 true EP3384583A1 (en) | 2018-10-10 |
Family
ID=57421592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16801951.1A Withdrawn EP3384583A1 (en) | 2015-12-03 | 2016-11-09 | Rotor device for an electric motor and/or generator, rotor, motor comprising such a rotor device, and production method |
Country Status (5)
Country | Link |
---|---|
US (2) | US11081915B2 (en) |
EP (1) | EP3384583A1 (en) |
CN (1) | CN108370207A (en) |
DE (1) | DE102015121102B4 (en) |
WO (1) | WO2017092741A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10958137B2 (en) * | 2016-08-09 | 2021-03-23 | Nidec Corporation | Drive device |
DE102018202597A1 (en) | 2018-02-21 | 2019-08-22 | Robert Bosch Gmbh | Bearing arrangement for an electric motor, method for forming the bearing assembly and electric motor with the bearing assembly |
SE542616C2 (en) * | 2018-09-27 | 2020-06-16 | Leine & Linde Ab | Rotary encoder and method for manufacturing a rotary encoder |
EP3829041A1 (en) * | 2019-11-29 | 2021-06-02 | Hilti Aktiengesellschaft | Hall board within winding heads |
DE102020116849A1 (en) | 2020-06-26 | 2021-12-30 | Schaeffler Technologies AG & Co. KG | Rotary electric machine rotor, method of manufacturing the rotor, and rotary electric machine |
DE102020131410A1 (en) * | 2020-11-26 | 2022-06-02 | Nidec Motors & Actuators (Germany) Gmbh | Electric motor with an injection-molded rotor having an axial support for a ball bearing |
DE102021107768A1 (en) | 2021-03-26 | 2022-09-29 | Elringklinger Ag | Laminated core and manufacturing process |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS62254649A (en) * | 1986-04-25 | 1987-11-06 | Isuzu Motors Ltd | Generator for turbocharger |
US4896754A (en) * | 1988-08-25 | 1990-01-30 | Lord Corporation | Electrorheological fluid force transmission and conversion device |
DE59305082D1 (en) * | 1993-08-26 | 1997-02-20 | Siemens Ag | Shaft with magnetic body held concentrically on it |
DE19625478A1 (en) * | 1996-06-05 | 1997-12-11 | Teves Gmbh Alfred | Magnetic ring |
JP3672775B2 (en) * | 1999-10-18 | 2005-07-20 | 松下エコシステムズ株式会社 | Brushless motor |
DE10261574A1 (en) | 2002-12-23 | 2004-07-01 | Robert Bosch Gmbh | Claw pole |
DE102004017716A1 (en) * | 2004-04-10 | 2005-10-20 | Bosch Gmbh Robert | Rotor of an electric machine |
JP2006014473A (en) * | 2004-06-25 | 2006-01-12 | Aisin Seiki Co Ltd | Motor |
JP4715280B2 (en) * | 2005-04-13 | 2011-07-06 | アイシン精機株式会社 | Permanent magnet embedded motor, pump device, and method of manufacturing permanent magnet embedded motor |
US7679252B2 (en) * | 2005-04-13 | 2010-03-16 | Aisin Seiki Kabushiki Kaisha | Magnet embedded motor, rotor unit, and method for manufacturing rotor unit |
JP2008154391A (en) * | 2006-12-19 | 2008-07-03 | Mitsubishi Electric Corp | Magnet generator |
DE102007015249A1 (en) * | 2007-03-27 | 2008-10-02 | Miele & Cie. Kg | Rotor, in particular for an electric motor of a circulating pump |
JP5442388B2 (en) * | 2009-10-22 | 2014-03-12 | 株式会社日立産機システム | Magnetic iron core and manufacturing method thereof, axial gap type rotating electric machine, stationary machine |
DE102010031399A1 (en) * | 2010-07-15 | 2012-01-19 | Hilti Aktiengesellschaft | Rotor for an electric motor, electric motor and manufacturing method for an electric motor |
CN103003481A (en) * | 2010-07-21 | 2013-03-27 | 松下电器产业株式会社 | Brushless motor for washing machine, drum-type washing machine provided with same and manufacturing method of brushless motor for washing machine |
DE102011089243A1 (en) * | 2011-12-20 | 2013-06-20 | Continental Automotive Gmbh | magnetic wheel |
DE202012103438U1 (en) * | 2012-09-10 | 2012-09-28 | Hanning Elektro-Werke Gmbh & Co. Kg | Rotor for an electric machine |
JP6153826B2 (en) * | 2013-09-05 | 2017-06-28 | 株式会社三井ハイテック | Rotor with permanent magnet and manufacturing method thereof |
JP2015104244A (en) * | 2013-11-26 | 2015-06-04 | ファナック株式会社 | Rotor having resin hole for resin filling and manufacturing method of rotor |
-
2015
- 2015-12-03 DE DE102015121102.5A patent/DE102015121102B4/en not_active Expired - Fee Related
-
2016
- 2016-11-09 CN CN201680070739.7A patent/CN108370207A/en active Pending
- 2016-11-09 EP EP16801951.1A patent/EP3384583A1/en not_active Withdrawn
- 2016-11-09 WO PCT/DE2016/200507 patent/WO2017092741A1/en unknown
-
2018
- 2018-05-30 US US15/992,759 patent/US11081915B2/en active Active
-
2019
- 2019-04-11 US US16/381,753 patent/US11081916B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20190238015A1 (en) | 2019-08-01 |
US11081916B2 (en) | 2021-08-03 |
DE102015121102B4 (en) | 2019-11-07 |
WO2017092741A1 (en) | 2017-06-08 |
US11081915B2 (en) | 2021-08-03 |
US20180278103A1 (en) | 2018-09-27 |
CN108370207A (en) | 2018-08-03 |
DE102015121102A1 (en) | 2017-06-08 |
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