NL2021175B1 - Power Coupler - Google Patents

Power Coupler Download PDF

Info

Publication number
NL2021175B1
NL2021175B1 NL2021175A NL2021175A NL2021175B1 NL 2021175 B1 NL2021175 B1 NL 2021175B1 NL 2021175 A NL2021175 A NL 2021175A NL 2021175 A NL2021175 A NL 2021175A NL 2021175 B1 NL2021175 B1 NL 2021175B1
Authority
NL
Netherlands
Prior art keywords
ring
power coupler
coupler according
core
rings
Prior art date
Application number
NL2021175A
Other languages
Dutch (nl)
Inventor
De Vries Eize
Original Assignee
Vervent B V
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 Vervent B V filed Critical Vervent B V
Priority to NL2021175A priority Critical patent/NL2021175B1/en
Priority to PCT/NL2019/050386 priority patent/WO2020005057A1/en
Application granted granted Critical
Publication of NL2021175B1 publication Critical patent/NL2021175B1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/64—Devices for uninterrupted current collection
    • H01R39/646—Devices for uninterrupted current collection through an electrical conductive fluid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/30—Liquid contacts

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Abstract

The invention provides an electrical power coupler for electrically coupling a first and second part having a different rotational speed with respect to one another about a power coupler rotational axis, comprising at least one first contact coupled to a first ring and a second contact coupled to a second ring, said first and second ring from an electrically conductive material and functionally concentric, said first and second ring having rotational symmetry axes that functionally coincide with said power coupler rotational axis and said first and second rings rotatable with respect to one another and having a gap between them and which in use is filled with a conductive material that in use allows said first and second ring to rotate with respect to one another and to conduct electrical power from said contact and said second contact.

Description

Field of the invention
The invention relates to an electrical power coupler and its application in a wind turbine.
Background of the invention
US6582237 according to its abstract provides a “..full-rotational freedom conductor assembly for conducting electricity between a pair of coaxial electrically conductive members. The conductive members are provided with complementary, planar tracks and are relatively rotatable about a common axis thereof. The invention includes a pair or pairs of opposing coupler halves having a planetary axis, with trackadapted profiles. The pairs of coupler halves are rotatably confined between the tracks enabling electrical contact between the tracks of the conductive members. The invention further includes a force source located at least partially between the coupler halves. The force source applies force to each of the coupling halves in a direction substantially parallel to the second common axis.; The force is applied to the pairs of coupler halves in a manner that enables the coupler halves to be flexibly retained between the tracks.” The assembly relates to large currents. The pairs of coupler halves have a narrow circular gap in between, for instance 0.5 - 1 mm.
Summary of the invention
It is an aspect of the invention to provide an alternative power coupler. In particular, a power coupler which preferably further at least partly obviates one or more of above-described drawbacks.
There is provided an electrical power coupler for electrically coupling a first and second part having a different rotational speed with respect to one another about a power coupler rotational axis, comprising at least one first contact coupled to a first ring and a second contact coupled to a second ring, said first and second ring from an electrically conductive material and functionally concentric, said first and second ring having rotational symmetry' axes that functionally coincide with said power coupler rotational axis and said first and second rings rotatable with respect to one another and having a gap between them and which in use is filled with a conductive material that in use allows said first and second ring to rotate with respect to one another and to conduct electrical power from said contact and said second contact.
It was found that the power coupler can be provided in a large current rotary transmitter (LCRT) can be used in large constructions that require large electrical power transmission, like for instance offshore oil & gas constructions in an explosionprone operating environment. Such an LCRT is in particular used in wind turbines, for instance wind turbines that have an output of between 1 and 20 MW.
The conductive material that is used in the gap in particular comprises a powder, semi-liquid or fully fluid conductive material. In that sense, graphite is also considered a useful conductive fluid. An example is graphite powder sold by Griffon :
In particular, a copper paste can be used. An example is the Marston-Domsel copper paste, which is specified as having the following main characteristics: ‘High application temperature range from -30°C to +1300°C, optimum dismantling prerequisites even after long periods of time, high pressure resistance, good electrical conductivity, excellent lubricating and separating effect, prevents cauterisation and seizing up of steel components, excellent heat dissipation, sulphur, lead and nickelfree, very low friction coefficient, extremely adhesive, water and corrosion-resistant, excellent separation and lubrication effect, sealing effect against corrosive gases and liquids.’ A further suitable copper past is for instance described in US4789411, which is incorporated by reference as if fully set forth.
Alternative conductive materials could for instance be lithium-based paste, mercury, silver-based, gold-based, aluminum-based (see table)
Table of Resistivity and Conductivity at 20°C
Material p (Q*m) at 20 °C Resistivity σ (S/m) at 20 °C Conductivity
Silver 1.59x10“® 6.30x107
Copper 1.68* 108 5.96x107
Annealed copper 1.72*10“® 5.80x10''
Gold 2.44x10“® 4.10x107
Aluminum 2.82x10“® 3.5x107
Calcium 3.36x10~8 2.98x10
Tungsten 5.60x10“® 11.79x10'
Zinc 5.90x10“® i1.69x107
Nickel 6.99χ10“δ d.43x107
Lithium 9.28x10“® d.08x10”
iron 1.0x10“7 h.ooxio7
Platinum 1.06x10“7 9.43x10®
Tin 1.09x10“7 9.17x106
Carbon steel (1010) d.43x10“7
Lead 2.2x10“ 4.55x10®
Titanium 4.20x10“7 2.38x10®
Grain oriented electrical steel 4.60x10“7 2.17x10®
Manganin 4.82x10“” 2.07x10®
Constantan 4.9x10“7 2.04x10®
Stainless steel 6.9*10~7 11.45x10®
Mercury 9.8x10~7 d.02x10®
Nichrome 1.10x10“® 9.09x10®
GaAs 5x10“7 to 10x10“3 5x10“® to 108
Carbon (amorphous) 5x10“4 to 8x10“4 il .25 to 2x103
Carbon (graphite) 2.5x10~6 to 5.0x10“®//basal plane 3.0x10”3 ± basal plane 2 to 3x10s //basal plane 3.3χ102 ± basal plane
In particular, such an LCRT is suitable for a counter-rotating generator applied in the applicants drivetrain which comprises two generator rotors instead of one generator-rotor and one stator with conventional generator topologies. This is 5 describes in patent applications NL 2019335, NL 2019518, EP18160789.6.
The electric power or current generated such a counter-rotating generator must therefore be transmitted from a rotating body to a stationary body. The generator part with coils in the current generator layout forms the inner rotor, while the outer rotor contains electro magnets. This generator outer rotor in another arrangement could 10 contain permanent magnets, while in again another alternative arrangement de electrically excited or permanent magnets could be incorporated in the inner rotor and the outer rotor equipped with the coils. Thus, in such a specific counter-rotating generator, there will be a rotating part that needs to be electrically coupled with a stationary' part.
In a particular arrangement, the inner part of the power coupler rotatingly coupled to the rotating generator part with the inner part rotating and the outer part stationary. In an alternative arrangement the outer part is rotating and the inner part is stationary.
In an embodiment, the two concentric rings are at substantially the same axial position. In particular, the at least one first ring is functionally coaxially with respect to the at least one second ring.
In an embodiment, the first ring is centred within said second ring.
In an embodiment, the power coupler comprises a series of first contacts and a series of second contacts, each first contact coupled to one first ring and each second contact coupled to one second ring, wherein each time a first and second ring for a pair having said gap, and said pairs are electrically insulated from one another.
In an embodiment, the power coupler further comprising a core having a substantially circle cylindrical shape having a rotation symmetry' axis that is functionally coinciding with said power coupler rotational axis, and a. circle cylindrical jacket concentrically about said core.
In an embodiment, the core holds said first ring.
In an embodiment, the jacket holds said second ring.
In an embodiment, the core comprised at least two core discs. In particular, the at least two core disks are of an insulating material. In a more particular embodiment, the at least two core disks are of an electronically insulating ceramic, an electronically insulating polymer or other insulating material, wherein two subsequent core discs hold a said ring between then.
In an embodiment, the jacket comprises at least two jacket rings, in particular insulating jacket rings, having a second ring between them.
In an embodiment, the jacket rings comprise at least one electrically insulating sealing ring sealing against an outer surface of said core part.
In an embodiment, the core part comprised at least one sealing ring at opposite axial position with respect to each ring, said sealing rings sealing against said inner surface of said jacket, in particular for defining ring-shaped chambers in fluid communication with said gap.
In an embodiment, the first and second ring provide facing ring surfaces having a surface area of one ring of facing rings is at least 10 cm2· In particular, the facing ring surface of one ring is at least 100 cm2. In an embodiment, the surface area is less than 1 m2.
In an embodiment, the gap having a distance between said facing ring surfaces of less than 2 mm, in particular said gap provides a spacing of 0.3 - I mm between nearest surfaces of said first and second ring.
In an embodiment, the conductive material is selected from cupper paste, lithium past, silver past, aluminium past, gold paste, and a combination thereof.
In an embodiment, in use said at least one first ring rotates and said at least one second ring is stationary.
In an embodiment, in use said at least one second ring rotates and said at least one first ring is stationary'.
In an embodiment, the power coupler further comprising a cooling mantle provided around the outer part of the power coupler, in particular comprising a closed cooling air circuit, an air-air or air-liquid heat exchanger, and more in particular a temperature control strategy based upon regulating air volume and air velocity through said power coupler.
In an embodiment, the power coupler further comprising an insulating disk between each pair of a said first ring and a said second ring for providing an additional electrical barrier, in particular against high-voltage ‘phase bridging’.
In an embodiment, the conductive material for in use filling said gap is selected from a low-friction powder-type conductive material, a semi-liquid conductive material, a liquid conductive material, a conductive paste, and a combination thereof.
In an embodiment, the power coupler is provided for coupling an at least two phase electrical powder, wherein each phase is coupled to a separate first ring. In an embodiment, the power coupled comprises three first rings and three corresponding rings for coupling a three-phase current.
The invention further pertains to an electrical power coupler for electrically coupling a first and second part having a different rotational speed with respect to one another about a rotational axis, said electrical power coupler comprising at least one first contact electrically coupled to a first ring and a second contact electrically coupled to a second ring, said first ring and said second ring concentric with respect to said rotational axis, said first and second ring having a mutual spacing, said first ring held in a substantially circle cylindrical core of an electrically insulating material which is coaxially with respect to said rotational axis, said second ring held in a substantially circle cylindrical jacket and which is coaxially with respect to said rotational axis, said circle cylindrical core and said circle cylindrical jacket rotatable with respect to one another with respect to said rotational axis, at least one of said circle cylindrical core and said circle cylindrical jacket holding a first and second sealing at an axial distance from one another and at axially opposite distance from said first and second ring, said mutual spacing and an axial spacing between said first and second sealing and a spacing between said circle cylindrical core and said circle cylindrical jacket defining a circular chamber for in use holding an electrically conductive fluid for electrically coupling said first and second ring.
The invention further pertains to a wind turbine comprising said electrical power coupler.
The invention further pertains to an offshore installation comprising said electrical power coupler.
The term “substantially” herein, such as in “substantially all emission” or in “substantially consists”, will be understood by the person skilled in the art. The term “substantially” may also include embodiments with “entirely”, “completely”, “all”, etc. Hence, in embodiments the adjective substantially may also be removed. Where applicable, the term “substantially” may also relate to 90% or higher, such as 95% or higher, especially 99% or higher, even more especially 99.5% or higher, including 100%. The term “comprise” includes also embodiments wherein the term “comprises” means “consists of”.
The term functionally” will be understood by, and be clear to, a person skilled in the art. The term “substantially” as well as “functionally” may also include embodiments with “entirely”, “completely”, “all”, etc. Hence, in embodiments the adjective functionally may also be removed. When used, for instance in “functionally parallel”, a skilled person will understand that the adjective “functionally” includes the term substantially as explained above. Functionally in particular is to be understood to include a configuration of features that allows these features to function as if the adjective “functionally” was not present. The term “functionally” is intended to cover variations in the feature to which it refers, and which variations are such that in the functional use of the feature, possibly in combination with other features it relates to in the invention, that combination of features is able to operate or function. For instance, if an antenna is functionally coupled or functionally connected to a communication device, received electromagnetic signals that are receives by the antenna can be used by the communication device. The word “functionally” as for instance used in “functionally parallel” is used to cover exactly parallel, but also the embodiments that are covered by the word “substantially” explained above. For instance, “functionally parallel” relates to embodiments that in operation function as if the parts are for instance parallel. This covers embodiments for which it is clear to a skilled person that it operates within its intended field of use as if it were parallel.
Furthermore, the terms first, second, third and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other sequences than described or illustrated herein.
The devices or apparatus herein are amongst others described during operation. As will be clear to the person skilled in the art, the invention is not limited to methods of operation or devices in operation.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. Use of the verb to comprise and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. The article a” or an preceding an element does not exclude the presence of a plurality of such elements. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
The invention further applies to an apparatus or device comprising one or more of the characterising features described in the description and/or shown in the attached drawings. The invention further pertains to a method or process comprising one or more of the characterising features described in the description and/or shown in the attached drawings.
The various aspects discussed in this patent can be combined in order to provide additional advantages. Furthermore, some of the features can form the basis for one or more divisional applications.
Brief description of the drawings
Embodiments of the invention will now be described, by way of example only, with reference to the accompanying schematic drawings in which corresponding reference symbols indicate corresponding parts, and in which:
Figure 1 schematically depicts an perspective view, having a pie part cut away, of an embodiment of the power coupler, and
Figure 2 a cross section of the power coupler of figure 1.
The drawings are not necessarily on scale
Description of preferred embodiments
Figure 1 schematically depicts an perspective view, having a pie part cut away, of an embodiment of the power coupler 1, and figure 2 a cross section of the power coupler 1 similar to figure 1.
The powder coupler 1 comprises a series of first contacts 2, 2’, 2”, and a series of second contacts 4, 4’, 4”. The power coupler electrically couples these respective contacts for providing an electrical connection between contact 2 and 4, 2’ and 4’, and 2” and 4”. The first contacts 2, 2’, 2” are coupled to a first part of for instance a wind turbine, and the second contacts 4, 4’, 4” are coupled to a second part of this wind turbine. The first and second part can rotate with respect to one another around a rotational axis R. Usually, large electrical currents can be transmitted, for instance up to 500 - 1000MW per contact and 11 --- 13.8kV generator voltage level.
The power coupler 1 comprises a series of first rings 3, 3’ and 3”. Each of these first rings 3, 3’, 3”, is coupled to a respective first contact 2 2’, 2”. The power coupler further comprises a series of second rings 5, 5’, 5”. Each of these second rings 5, 5’, 5” is coupled to a respective second contact 4, 4’, 4”. Each of the first rings 3, 3’, 3”, is concentrically with respect to a respective second ring 5, 5’, 5”. Each first ring 3,
3’, 3” and second ring 5, 5’, 5” comprises a gap G between them. In operation, this gap G is substantially filled with a conductive material that allows the rings to rotate with respect to one another around their rotational axes which coincides with power coupler rotational axis R.
In the current embodiment, each first rings 3, 3’, 3” are centered within respective second rings 5, 5’, 5”.
In figures I and 2, the power coupler 1 comprises a core 6 and a jacket 7. The core and jacket are rotatable with respect to one another around the power coupler rotational axis R. In the current embodiment, the first rings 3, 3’, 3” are held in the core 6, and the second rings 5, 5’, 5” are held in the jacket 7. For a simple and efficient construction, the core 6 comprises a series of core cylinders 8-8’”. In an embodiment, two core cylinders 8-8”’ hold a first ring 3, 3’, 3” between then. The core cylinders can be made from an insulating material. For instance, a high-performance insulating ceramic or polymer material can be used. In the embodiment of figure I, the core cylinders 8-8’” are held together using a series of core mounting bars 19. In the embodiments of figure 1 and 2, the first contacts 2, 2’, 2” each comprises an axial lead that connects to one of the respective first rings 3, 3’, 3”. The axial leads run though the core 6. The axial leads can comprise lead ends incorporated in core cylinders 8-8’”.
For easy construction, the jacket 7 comprises a series of jacket rings 9. These jacket rings 9 are stacked and hold second rings 5, 5’, 5”. In the illustrated embodiment, the jacket rings 9 are identical. The jacket rings 9 are in an embodiment substantially made from an electrically insulating material.
Each set of one of the first rings 3, 3’, 3” and one of the corresponding second rings 5, 5’, 5” is electrically separated from one another through sealing rings 10, 11 between the core 6 and jacket 7.
Insulating disks are provided between each set of a first and second ring, The insulating disks 15 are made of a high-performance electrically insulating material and their main function is creating an electrical barrier against high-voltage leaks between the individual sets of rings. Each set of rings can for instance be coupled to a different electrical phase.
The jacket 7 comprises an upper disk 12 which in the current embodiment rests on the core 6 via a bearing 18. This construction simplified the construction.
In the embodiment of figures 1 and 2, the upper disk 12 radially extends from the jacket 7, and the jacket 7 further comprises a lower disk 13 which also radially extends from the jacket 7. The upper and lower disks 12, 13 are connected via a cooling jacket 14, to provide a cylindrical cooling space between the jacket 7 and cooling jacket 14. The cooling jacket 44 comprises a cooling fluid inlet 16 and a cooling fluid outlet 17. In this embodiment, the cooling fluid is air.
The cooling air circulates in a closed circuit (not impacted by the harsh marine environment). The air flow passes through an air/air or air-water heat exchanger with an air flow controlled or alternative control strategy for precise internal LCRT temperature management during all operating conditions including full load. This can be in individual cooling arrangement, or be integrated with the turbine cooling system.
In the current embodiment, each second ring 5, 5’, 5” comprises a channel 20 which couples the radial outer surface and the radial inner surface and is coupled to a source of conductive material. The channel is in communication with the gap G and allows (keeping) the gap G and in the current embodiment conductive fluid chamber to be fluidly coupled to the source of conductive fluid.
Each first ring 3, 3’, 3” and second ring 5, 5’, 5” provide facing surfaces that partly bound the gap G. These facing surfaces have an area which are here defined by D x 2 x Rr x π, with D the (axial) thickness of the first and second rings (which here almost correspond) and Rr the outer radius or the first rings which almost corresponds to the inner radius of the second rings. The relative large surface area reduces the current per amount of area. The first and second rings are usually from a conductive material, for instance copper.
Currently, there are five specific embodiments that may be considered for electrically coupling said first and second ring or firs and second rings in ring pairs.
Below, several embodiments for electrically coupling the first ring and second ring are discussed. These embodiments may be combined.
Option 1 - Conventional slip ring and brushes.
Electrical power is coupled to one or more first rings via one or more brushes. In case of electrical power in several phases, each electric phase (for instance three in total) is coupled to one first ring and is coupled via at least one brush unit per first ring.
Option 2 - Concentric rings with minimal vertical air gap.
Electric generator current (for instance three phases) is transmitted from individual inner first rings to a matching second rings via a minimal air gap and with the aid of an electrical conductive powder (graphite), semi-liquid (copper paste) or liquid that (completely) fills the gap.
Option 3 - Concentric rings with minimal air gap in inclined position (relative to a horizontal plane, or a plane that is normal to the rotational axis of the power coupler)
Electric generator current (e.g., three phases) is transmitted from individual inner rotating inclined first rings to a matching stationary' opposed second ring s via a minimal air gap and with the aid of an electrical conductive powder (graphite), semiliquid (copper paste) or liquid that (completely) fills the gap.
Option 4 - Concentric rings with multiple V-shaped rollers.
Electric generator current (e.g., three phases) is transmitted from individual inner rotating inclined first rings to a matching opposed second rings with the aid of Vshaped rollers equally interspaced and incorporated in a roller cage. In an embodiment, a spiral spring incorporated in the stationary’ outer housing provides adequate pressure to the rollers for ensuring efficient current transmission. In a further embodiment, an electrically conductive powder (e.g., graphite), an electrically conductive semi-liquid (e.g., copper paste) or electrically conductive liquid with additional excellent lubrication characteristics enhances electric power transmission and ensures adequate lubrication and long service life of all moving components and surfaces.
Option 5 - Silver-fibre brushes and silver-lined copper ring
Generator power induced is coupled to one or more first rings and silver-fibre brushes. Each electric phase (three in total) contains one first ring and at least one brush unit per first ring. The individual metal fibres are very’ thin and could be described as a ‘wire brush’ containing wires of a specific metal alloy with silver coating. The copper first rings are also silver coated, and due to the relative movement of the brushes at the silver-lined first ring, the latter surface becomes patinated and shiny. Once this stage is reached, further w’ear stops and optimal silver-silver contact between brushes and first ring is ensured.
It will also be clear that the above description and drawings are included to illustrate some embodiments of the invention, and not to limit the scope of protection. Starting from this disclosure, many more embodiments will be evident to a skilled person. These embodiments are within the scope of protection and the essence of this invention and are obvious combinations of prior art techniques and the disclosure of this patent.
Reference Numbers
1. Power coupler
2. First contact
3. Firstring
4. Second contact
5. Second ring
6. Core
7. Jacket
8. Core cylinder
9. Jacket ring
10. Sealing ring
11. Further sealing ring
12. Upper disc
13. Lower disc
14. Cooling jacket
15. Insulating disk
16. Cooling inlet
17. Cooling outlet
18. Bearing
19. Core mounting bar
20. Conductive material inlet
R power coupler rotational axis
G gap between first and second ring
P100297NL00

Claims (23)

ConclusiesConclusions 1. Een elektrische vermogenskoppelaar voor het elektrisch koppelen van een eerste en tweede deel met een verschillende rotatiesnelheid ten opzichte van elkaar om een rotatie-as van een vermogenskoppeldeel, omvattende ten minste een eerste contact gekoppeld aan een eerste ring en een tweede contact gekoppeld aan een tweede ring, de eerste en tweede ring van een elektrisch geleidend materiaal en functioneel concentrisch, waarbij de eerste en tweede ring rotatiesymmetrie-assen hebben die functioneel samenvallen met de rotatie-as van de vermogenskoppelaar en de eerste en tweede ringen roteerbaar ten opzichte van elkaar en met een opening daartussen en die in gebruik is gevuld met een geleidend materiaal dat tijdens gebruik de eerste en tweede ring toestaat ten opzichte van elkaar te roteren en elektrische energie van het contact naar het tweede contact te geleiden.An electrical power coupler for electrically coupling a first and second part with a different rotational speed relative to each other about an axis of rotation of a power coupling part, comprising at least a first contact coupled to a first ring and a second contact coupled to a second ring, the first and second ring of an electrically conductive material and functionally concentric, the first and second ring having axes of rotation symmetry which functionally coincide with the axis of rotation of the power coupler and the first and second rings rotatable with respect to each other and with an opening therebetween and filled in use with a conductive material that allows the first and second rings to rotate with respect to each other during use and to conduct electrical energy from the contact to the second contact. 2. De vermogenskoppelaar volgens conclusie 1, waarbij de twee concentrische ringen op in hoofdzaak gelijke axiale positie zijn, in het bijzonder functioneel coaxiaal.The power coupler according to claim 1, wherein the two concentric rings are at substantially the same axial position, in particular functionally coaxial. 3. De vermogenskoppelaar volgens conclusie 1 of 2, waarbij de eerste ring gecentreerd is binnen de tweede ring.The power coupler according to claim 1 or 2, wherein the first ring is centered within the second ring. 4. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, waarbij de vermogenskoppelaar een reeks eerste contacten en een reeks tweede contacten omvat, waarbij elk eerste contact is gekoppeld aan één eerste ring en elk tweede contact is gekoppeld aan één tweede ring, waarbij elke keer een eerste en tweede ring van een paar de opening omvat, en de paren elektrisch van elkaar geïsoleerd zijn.The power coupler according to one or more of the preceding claims, wherein the power coupler comprises a series of first contacts and a series of second contacts, wherein each first contact is coupled to one first ring and each second contact is coupled to one second ring, each time a first and second ring of a pair comprises the opening, and the pairs are electrically insulated from each other. 5. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, verder omvattende een kern met een in hoofdzaak cirkel-cilindrische vorm met een rotatie symmetrie as die functioneel samenvalt met de rotatie-as van de vermogenskoppelaar, en een cirkel cilindrische mantel die concentrisch om de kern is.The power coupler according to one or more of the preceding claims, further comprising a core with a substantially circular cylindrical shape with a rotation symmetry axis that functionally coincides with the rotation axis of the power coupler, and a circular cylindrical shell concentrically around the core. 6. De vermogenskoppelaar volgens conclusie 5, waarbij de kern de eerste ring houdt.The power coupler according to claim 5, wherein the core holds the first ring. 7. De vermogenskoppelaar volgens conclusie 5 or 6, waarbij de mantel de tweede ring houdt.The power coupler according to claim 5 or 6, wherein the jacket holds the second ring. 8. De vermogenskoppelaar volgens een der conclusies 5-7, waarbij de kern ten minste twee kernschijven omvat, in het bijzonder van een isolerend materiaal, meer in het bijzonder van een elektronisch isolerend keramiek, een elektronisch isolerend polymeer of een ander isolerend materiaal, waarbij twee opvolgende kern schijven een van de ringen tussen zich houden.The power coupler according to any one of claims 5-7, wherein the core comprises at least two core disks, in particular of an insulating material, more in particular of an electronic insulating ceramic, an electronic insulating polymer or another insulating material, two consecutive core disks hold one of the rings between them. 9. De vermogenskoppelaar volgens een der conclusies 5-8, waarbij de mantel ten minste twee mantelringen omvat, in het bijzonder isolerende mantelringen, met een tweede ring tussen zich.The power coupler according to any one of claims 5-8, wherein the casing comprises at least two casing rings, in particular insulating casing rings, with a second ring between them. 10. De vermogenskoppelaar volgens conclusie 9, waarbij de mantelringen ten minste een elektrisch isolerende afdichtende ring omvatten die afdicht tegen een buitenoppervlak van de kern.The power coupler according to claim 9, wherein the casing rings comprise at least one electrically insulating sealing ring that seals against an outer surface of the core. 11. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, waarbij de kern ten minste een afdichtende ring omvat op een tegenoverliggende axiale positie ten opzichte van elke ring, waarbij de afdichtende ring afdicht tegen het binnenoppervlak van de mantel, in het bijzonder voor het definiëren van ringvormige kamers die in fluïdum communicatie zijn met de spleet.The power coupler according to one or more of the preceding claims, wherein the core comprises at least one sealing ring at an opposite axial position with respect to each ring, the sealing ring sealing against the inner surface of the jacket, in particular for defining of annular chambers that are in fluid communication with the slit. 12. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, waarbij de eerste en tweede ring een tegenoverliggend ringoppervlak verschaffen van de eerste en tweede ring met een oppervlak van ten minste 10 cm2 The power coupler according to one or more of the preceding claims, wherein the first and second ring provide an opposite ring surface of the first and second ring with a surface of at least 10 cm 2 13. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, waarbij de spleet een afstand tussen de tegenoverliggende ring oppervlakken heeft van minder dan 2 mm, in het bijzonder verschaft de spleet een ruimte van 0.3 - 1 mm tussen meest nabije oppervlakten van de eerste en tweede ring.The power coupler according to one or more of the preceding claims, wherein the gap has a distance between the opposite ring surfaces of less than 2 mm, in particular the gap provides a space of 0.3 - 1 mm between the nearest surfaces of the first and second ring. 14. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, waarbij het geleidende materiaal gekozen is uit koperpasta, lithiumpasta, zilverpasta, aluminiumpasta, goudpasta, en een combinatie daarvan.The power coupler according to one or more of the preceding claims, wherein the conductive material is selected from copper paste, lithium paste, silver paste, aluminum paste, gold paste, and a combination thereof. 15. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, waarbij in gebruik de ten minste ene eerste ring roteert en de ten minste ene tweede ring stationair is.The power coupler according to one or more of the preceding claims, wherein in use the at least one first ring rotates and the at least one second ring is stationary. 16. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, waarbij in gebruik de ten minste ene tweede ring roteert en de ten minste ene eerste ring stationair is.The power coupler according to one or more of the preceding claims, wherein in use the at least one second ring rotates and the at least one first ring is stationary. 17. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, verder omvattende een koelmantel om het buitendeel van de vermogenskoppelaar, in het bijzonder omvattende een gesloten luchtkoelcircuit, een lucht-lucht of luchtvloeistof warmtewisselaar, en meer in het bijzonder een temperatuurregelstrategie gebaseerd op het regelen van lucht volume en luchtsnelheid door de vermogenskoppelaar.The power coupler according to one or more of the preceding claims, further comprising a cooling jacket around the outer part of the power coupler, in particular comprising a closed air cooling circuit, an air-to-air or air-liquid heat exchanger, and more particularly a temperature control strategy based on control of air volume and air speed through the power coupler. 18. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, verder omvattende een isolerende schijf tussen elk paar gevormd door een eerste ring en een tweede ring voor het verschaffen van een aanvullende elektrische barrière, in het bijzonder tegen hoogspannings fasebruggen (‘high-voltage phase bridging’).The power coupler according to one or more of the preceding claims, further comprising an insulating disk between each pair formed by a first ring and a second ring to provide an additional electrical barrier, in particular against high-voltage phase bridges bridging '). 19. De vermogenskoppelaar volgens een of meer der voorgaande conclusies, waarbij het geleidende materiaal voor het in gebruik vullen van de spleet gekozen is uit een laag-wrijving poeder-type geleidend materiaal, een semi-vloeibaar geleidend materiaal, een vloeibaar geleidend materiaal, een geleidende pasta, en een combinatie daarvan.The power coupler according to one or more of the preceding claims, wherein the conductive material for filling the gap in use is selected from a low-friction powder-type conductive material, a semi-liquid conductive material, a liquid conductive material, a conductive paste, and a combination thereof. 20. De vermogenskoppelaar volgens een of meer der voorgaande conclusies voor het koppelen van een ten minste twee-fase elektrisch vermogen, waarbij elke fase is gekoppeld aan een separate eerste ring.The power coupler according to one or more of the preceding claims for coupling an at least two-phase electrical power, each phase being coupled to a separate first ring. 21. Een elektrisch vermogenskoppelaar voor het elektrisch koppelen van een eerste en tweede deel die een verschillende rotatiesnelheid hebben ten opzichte van elkaar om een rotatie-as, de elektrisch vermogenskoppelaar omvattende ten minste een eerste contact dat elektrisch gekoppeld is aan een eerste ring en een tweede contact dat elektrisch gekoppeld is aan een tweede ring, de eerste ring en de tweede ring concentrisch ten opzichte van de rotatie-as, de eerste en tweede ring met een onderlinge tussenruimte, de eerste ring in een in hoofdzaak cirkel cilindrische kern van een elektrisch isolerend materiaal dat coaxiaal is ten opzichte van de rotatie-as, de tweede ring gehouden in een in hoofdzaak cirkel cilindrische mantel en die coaxiaal is ten opzichte van de rotatie-as, de cirkel cilindrische kern en de cirkel cilindrische mantel roteerbaar ten opzichte van elkaar ten opzichte van de rotatieas, ten minste een van de cirkel cilindrische kern en de cirkel cilindrische mantel die een eerste en tweede afdichting op een axiale afstand ten opzichte van elkaar houden en op axiaal tegenoverliggende afstand van de eerste en tweede ring, waarbij de onderlinge tussenruimte en een axiale tussenruimte tussen de eerste en tweede afdichting en een tussenruimte tussen de cirkel cilindrische kern en de cirkel cilindrische mantel jacket een cirkelvormige kamer definiëren voor het in gebruik houden van een elektrisch geleidend fluïdum voor het elektrisch koppelen van de eerste en tweede ring.An electric power coupler for electrically coupling a first and second part having a different rotational speed with respect to each other about a rotation axis, the electric power coupler comprising at least a first contact electrically coupled to a first ring and a second contact electrically coupled to a second ring, the first ring and the second ring concentric with respect to the axis of rotation, the first and second ring with a mutual gap, the first ring in a substantially circular cylindrical core of an electrically insulating material coaxial with respect to the axis of rotation, the second ring held in a substantially circular cylindrical sheath and coaxial with respect to the axis of rotation, the circular cylindrical core and the circular cylindrical sheath rotatable with respect to each other with respect to the axis of rotation, at least one of the circular cylindrical core and the circular cylindrical shell forming a ee first and second seal at an axial distance from each other and at an axially opposite distance from the first and second ring, the mutual gap and an axial gap between the first and second seal and a gap between the circle cylindrical core and the circle cylindrical jacket jacket define a circular chamber for keeping an electrically conductive fluid in use for electrically coupling the first and second ring. 22. Een windturbine omvattende de elektrisch vermogen koppeling volgens een der voorgaande conclusies.A wind turbine comprising the electric power coupling according to any one of the preceding claims. 23. Een offshore installatie omvattende de elektrisch vermogen koppeling volgens een der voorgaande conclusies.An offshore installation comprising the electric power coupling according to any one of the preceding claims. -o-o-o-o-o1-o-o-o-o-o1
NL2021175A 2018-06-25 2018-06-25 Power Coupler NL2021175B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL2021175A NL2021175B1 (en) 2018-06-25 2018-06-25 Power Coupler
PCT/NL2019/050386 WO2020005057A1 (en) 2018-06-25 2019-06-24 Current coupler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2021175A NL2021175B1 (en) 2018-06-25 2018-06-25 Power Coupler

Publications (1)

Publication Number Publication Date
NL2021175B1 true NL2021175B1 (en) 2020-01-06

Family

ID=63878748

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2021175A NL2021175B1 (en) 2018-06-25 2018-06-25 Power Coupler

Country Status (1)

Country Link
NL (1) NL2021175B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1459517A (en) * 1965-12-06 1966-04-29 Caterpillar Tractor Co Slip rings for high speed
US5866967A (en) * 1996-11-12 1999-02-02 Kabushiki Kaisha Toshiba Slip ring mechanism of non-sliding type
DE102009018655A1 (en) * 2009-04-23 2010-10-28 Siemens Aktiengesellschaft Liquid metal-rotary transmitter for use in e.g. wind turbine for rotation of wing, has electric current transmission equalization unit provided across circumference of gap that is formed between contact rings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1459517A (en) * 1965-12-06 1966-04-29 Caterpillar Tractor Co Slip rings for high speed
US5866967A (en) * 1996-11-12 1999-02-02 Kabushiki Kaisha Toshiba Slip ring mechanism of non-sliding type
DE102009018655A1 (en) * 2009-04-23 2010-10-28 Siemens Aktiengesellschaft Liquid metal-rotary transmitter for use in e.g. wind turbine for rotation of wing, has electric current transmission equalization unit provided across circumference of gap that is formed between contact rings

Similar Documents

Publication Publication Date Title
WO2020005057A1 (en) Current coupler
JP7026685B2 (en) High current and high RPM slip ring assembly
TWI577096B (en) Slip ring assembly
CN115699231B (en) Rotary electrical transformer with preferential lubricant
US20240063695A1 (en) Collection device for collecting electrical currents, and machine comprising a collection device of this kind
US7898140B2 (en) Brushless slip ring for a wind turbine and method of assembly
US5588843A (en) Rotary electrical connector
CZ190099A3 (en) Rolling-contact bearing with current bridge
AU2011359891A1 (en) Internally exicted synchronous motor comprising a permanent magnet rotor with multiple corrosion protection
NL2021175B1 (en) Power Coupler
JP2003065006A (en) Insulated structure rotor coupling
KR20230042349A (en) Active magnetic bearings for use in can-type rotational power flow machines for molten salt nuclear reactors and flow machines for molten salt nuclear reactors
RU2351044C2 (en) Multichannel sliding collector
US20060049711A1 (en) Homopolar multi-frames (cylinders) generator-motor
CN209045971U (en) Collector ring component and wind power generating set
CN111211649A (en) Brushless motor
CN102859121A (en) Arrangement for detecting axial movement of a shaft
KR101433765B1 (en) Non-contact slip-ring type motor
US1944952A (en) Homopolar generator
CN117083781A (en) Electric motor with integrated cooling
RU2498485C1 (en) Multi-disc unipolar dc electric machine
KR20210007095A (en) Ball rectifying bearing
CN110571995A (en) AC generator
AU2021284218B2 (en) Rotary electrical transformer with preferred lubricant
US20240097530A1 (en) Electric machine with open coil winding for direct cooling

Legal Events

Date Code Title Description
MM Lapsed because of non-payment of the annual fee

Effective date: 20210701