EP4264791A1 - Générateur segmenté, segment de rotor, segment de générateur et éolienne - Google Patents

Générateur segmenté, segment de rotor, segment de générateur et éolienne

Info

Publication number
EP4264791A1
EP4264791A1 EP21840581.9A EP21840581A EP4264791A1 EP 4264791 A1 EP4264791 A1 EP 4264791A1 EP 21840581 A EP21840581 A EP 21840581A EP 4264791 A1 EP4264791 A1 EP 4264791A1
Authority
EP
European Patent Office
Prior art keywords
segment
rotor
generator
section
separation interface
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.)
Pending
Application number
EP21840581.9A
Other languages
German (de)
English (en)
Inventor
Manuel FEITH
Wojciech GIENGIEL
Stephan Jöckel
Andreas Sattler
Lars Fischer
Alexander Philipp
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.)
Wobben Properties GmbH
Original Assignee
Wobben Properties GmbH
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 Wobben Properties GmbH filed Critical Wobben Properties GmbH
Publication of EP4264791A1 publication Critical patent/EP4264791A1/fr
Pending legal-status Critical Current

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
    • H02K1/28—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
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H02K7/1838—Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • 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
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791—Surface mounted magnets; Inset magnets
    • 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
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/70—Application in combination with
    • F05D2220/76—Application in combination with an electrical generator
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/12—Machines characterised by the modularity of some components
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention relates to a segmented generator for a wind turbine.
  • the invention also relates to a rotor segment and a generator segment of a segmented generator of a wind power plant.
  • the invention relates to a wind energy plant.
  • a wind turbine is a system that converts kinetic energy from wind into electrical energy and feeds it into a power grid.
  • the wind energy installation comprises a generator with a rotor, which is mounted so as to be rotatable about an axis of rotation relative to a stator.
  • a distinction is made between a horizontal and a vertical wind turbine. In the horizontal wind turbine, the axis of rotation is aligned horizontally.
  • the axis of rotation is aligned vertically.
  • Horizontal wind turbines are also known as horizontal-axis wind turbines and vertical wind turbines are also known as vertical-axis wind turbines.
  • Modern wind turbines generally relate to what are known as horizontal-axis wind turbines, in which the axis of rotation is arranged essentially horizontally and the rotor blades sweep over an essentially vertical rotor surface.
  • wind turbines have a nacelle which is arranged on a tower of the wind turbine so that it can rotate about a substantially vertical axis. When the wind energy installation is in an operating state, the wind causes the rotor blades to rotate, which drive the rotor of a generator which is coupled to the rotor blades.
  • the rotor blades and the rotor rotate relative to a stator of the generator. Due to the relative movement between rotor and stator, the (electrical) generator generates electrical energy.
  • the wind power plant In the operating state of the wind power plant, the wind power plant is set up at the installation site and is operated to convert the kinetic energy of the wind into electrical energy.
  • Wind turbines can be designed without a gear or with a gear.
  • gearless wind turbines have generators with a large diameter. It is quite common for the generators to have a diameter of 5 m and more.
  • These generators can be designed as so-called internal rotors or as so-called external rotors.
  • the rotor of the generator rotating with the rotor blades is arranged inside a fixed stator of the generator.
  • the rotor In the case of an external rotor, the rotor is arranged outside of the stator.
  • the stator is in particular arranged inside the rotor, preferably on the inside radially in relation to the rotor. Irrespective of the type of generator, generators are usually attached to the nacelle, in particular a machine carrier, of the wind turbine.
  • Generators can reach a mass of 150 t and more.
  • the transport of such generators is therefore always associated with a great deal of effort.
  • road transport may also be simply impossible.
  • generators as segmented generators.
  • Such a segmented generator has two or more generator segments.
  • the generator segments are usually designed in the form of a part ring or have a part ring-shaped geometry.
  • the generator segments are usually arranged to form a ring-shaped segmented generator.
  • Generator segments are usually transported individually to the installation site of a wind turbine.
  • the European Patent Office has searched the following prior art in the priority application for the present application: CN 112 018 968 A, AU 2018 431 391 A1, CN 108 964 301 A, EP 3 637 587 A1.
  • the object is achieved by a segmented generator for a wind turbine according to claim 14.
  • the axial direction corresponds to a direction parallel, i.e. along the axis of rotation.
  • the circumferential direction corresponds to a direction essentially tangential to the axis of rotation.
  • the radial direction corresponds to a direction radial to the axis of rotation.
  • the segmented generator for a wind turbine includes two or more generator segments.
  • the two or more generator segments are preferably arranged in a ring shape.
  • the two or more generator segments are coaxial with one another Arranged axis of rotation of the segmented generator.
  • the segmented generator includes a segmented rotor and a segmented stator.
  • the segmented rotor includes two or more rotor segments.
  • the segmented stator includes two or more stator segments.
  • the respective generator segment or the respective rotor segment and/or the respective stator segment are preferably designed in the form of a partial ring in relation to the axis of rotation in a circumferential direction.
  • the generator segment or the rotor segment and/or the stator segment have a partially annular geometry.
  • the two or more generator segments or the two or more rotor segments and/or two or more stator segments preferably extend with the same degree of arc in the circumferential direction.
  • the generator segments or the rotor and/or stator segments extend, depending on the number of the respective segments, according to the following formula: 3607(number of segments).
  • the generator segments of a segmented generator which comprises two generator segments, extend in the circumferential direction by 180°, with three generator segments it would be 120°, with four generator segments it would be 90° etc. This can apply accordingly to the rotor segments and/or stator segments .
  • the generator segments from which a segmented generator is assembled extend in the circumferential direction with a different degree of arc.
  • a segmented generator can be formed from three generator segments.
  • a first generator segment can extend in the circumferential direction at 180°
  • a second generator segment at 120°
  • a third generator segment at 60°.
  • Any other extensions in the circumferential direction of the generator segments are conceivable, provided they result in an extension of 360° in the circumferential direction.
  • the explanations regarding the generator segment can correspondingly apply to a rotor segment of a segmented rotor and/or a stator segment of a segmented stator.
  • the first and second separation interfaces extend substantially orthogonally to the circumferential direction.
  • the first and second separation interfaces define a first and second separation interface level, within which the axis of rotation extends.
  • the first and/or second separating interface extend in such a way that the first and/or second separating interface plane extend in a radial direction in relation to the axis of rotation.
  • the first and/or second parting interface planes which extend in the radial direction with respect to the axis of rotation, intersect in an axis that is or defines the axis of rotation.
  • the axis of rotation lies in the first and/or second separation interface planes, which extend in the radial direction in relation to the axis of rotation.
  • the first and/or second separation interface of a generator segment has a connection device.
  • the connection device at the first and/or second separation interface is designed to connect adjacent generator segments that are arranged to form a segmented generator to one another.
  • the connecting device of the first and/or second disconnection interface is designed in particular to mechanically connect adjacent generator segments.
  • the mechanical connection can be designed as a non-positive and/or material-to-material and/or form-fitting connection.
  • the first and/or second separating interface preferably has a flange connection and/or a screw connection as a connecting device for fastening adjacent generator segments in the circumferential direction.
  • the segmented generator is designed as a permanently excited segmented generator.
  • one or more permanent magnets are arranged on the rotor.
  • a permanent magnet also known as a permanent magnet, is a magnet that has a constant magnetic field that is not generated by electrical power, as is the case with electromagnets.
  • the permanent magnet consists of a magnetized material. Examples of magnetized materials of a permanent magnet are alloys of iron, cobalt, nickel, etc.
  • the segmented generator is preferably designed as an external rotor.
  • the stator or segmented stator is located on the inside in relation to the axis of rotation in the radial direction in relation to the rotor or segmented rotor.
  • its segmented rotor lying radially on the outside usually encloses the segmented stator lying radially on the inside.
  • segmented generators can also be transported to installation sites of wind turbines that are difficult to access and mounted on the tower of the wind turbine on the pod by transporting the generator segments individually.
  • no large and expensive special cranes are required for the assembly of a segmented generator.
  • the generator segments can be positioned individually on the nacelle or the machine carrier with a small crane, which only has to carry the mass of a single generator segment and reach the assembly height. This saves costs that would otherwise be incurred for the much more expensive large cranes.
  • large cranes are generally only available to a limited extent, so that the segmented generator gives you more flexibility with regard to the assembly time and also the assembly location.
  • the generator according to the invention is designed to take on a stiffening effect for the nacelle as soon as the generator is mounted on the nacelle.
  • a flange of the nacelle, to which the generator is fastened is made comparatively small, and the flange for mounting the generator on the nacelle is made comparatively large. This advantageously reduces the weight of the nacelle without negatively influencing the rigidity of the wind turbine when the generator is mounted on the nacelle.
  • this has the advantage that the nacelle can be installed more easily, quickly and cost-effectively using conventional and therefore readily available cranes.
  • the object is achieved by a rotor segment of a segmented generator for a wind turbine according to claim 1.
  • the rotor segment is a rotor segment for a rotor, in particular for a segmented rotor.
  • the rotor is a rotor for a generator, in particular for a segmented generator.
  • the rotor segment of the segmented generator includes a magnet carrier segment with a rotor peripheral surface.
  • the rotor peripheral surface is in particular a rotor outer peripheral surface.
  • the magnet carrier segment extends in a circumferential direction between first and second separation interfaces with a segment length.
  • the rotor peripheral surface has a first disconnection interface portion, a second disconnection interface portion, and a connection portion.
  • the first separation interface portion extends a first length from the first separation interface in the circumferential direction toward the second separation interface.
  • the second separation interface portion extends a second length from the second separation interface in the circumferential direction toward the first separation interface.
  • the connecting portion extends a third length between the first and second disconnect interfaces.
  • a stiffening device for stiffening the magnet carrier segment is arranged on the circumferential surface of the rotor in the area of the first and second separation interface section.
  • the rotor segment preferably extends in the radial direction between a radially inner flange for fastening the rotor segment to the rotor base body flange of a bearing unit and the radially outer magnet carrier segment.
  • the rotor segment preferably extends with a rotor support section between the radially inner flange for fastening the rotor segment to the rotor base body flange of the bearing unit and the radially outer magnet carrier segment.
  • the rotor segment can be of multi-part or integral design. In particular, it should be understood that the rotor segment can be formed integrally from individual rotor segments welded to one another.
  • the rotor segment has in particular the magnet carrier segment with a ring-shaped or part-ring-shaped geometry, at least one laminated rotor core and a rotor inner peripheral surface.
  • the at least one rotor laminated core is connected to the magnet carrier segment in a material-to-material and/or non-positive and/or positive-locking manner.
  • a plurality of magnet units are preferably arranged on the rotor laminated core at a distance from one another in the circumferential direction and form and/or define the inner circumferential surface of the rotor.
  • two or more magnet units are arranged at a distance from one another in the axial direction, the magnet units arranged adjacent in the axial direction defining a circumferential gap with a gap width for supplying and distributing a cooling medium.
  • the at least one magnet unit is in particular materially connected to the laminated rotor core.
  • the magnet units are also known as rotor active parts.
  • the magnet carrier segment preferably extends in the axial direction along the axis of rotation with a magnet carrier segment width.
  • the width of the magnet carrier segment is preferably constant over its circumference.
  • the first and second separation interface sections have first and second widths and the connecting section has a third width.
  • the first and second widths are identical.
  • the third width preferably corresponds to the first and/or second width.
  • the third width is preferably smaller than the first and/or second width.
  • the magnet carrier segment preferably has an extension in the radial direction orthogonal to the axis of rotation with a magnet carrier segment height.
  • the height of the magnet carrier segment is preferably constant over its circumference.
  • the first and second separation interface sections have first and second heights and the connecting section has a third height.
  • the first and second heights are identical.
  • the third height preferably corresponds to the first and/or second height.
  • the third height is preferably smaller than the first and/or second height.
  • the details of the first and/or second and/or third length and/or width and/or height are preferably to be understood as details of an average first and/or second and/or third length and/or width and/or height.
  • the first and/or second separation interface section and/or the connection section can each have a length and/or width and/or height that differs from the first and/or second and/or third length and/or width and/or height .
  • the details of the first and/or second and/or third length and/or width and/or height include details of a maximum first and/or second and/or third length and/or width and/or are height.
  • the stiffening device has a length in the circumferential direction, a width in the axial direction and a height in the radial direction. Preferably, the stiffening device is longer than it is wide and/or wider than it is high.
  • the length of the stiffening device corresponds to the first and/or second length of the respective separation interface section.
  • the length of the stiffening device is different from the first and/or second length of the respective separation interface section.
  • the length of the stiffening device is shorter than the first and/or second length of the respective separation interface section. It may also be preferred that the length of the stiffening device is longer than the first and/or second length of the respective severing interface section.
  • the width of the stiffening device corresponds to the first and/or second width of the respective separation interface section.
  • the width of the stiffening device differs from the first and/or second width of the respective separation interface section.
  • the width of the stiffening device is shorter than the first and/or second width of the respective separation interface section. It may also be preferred that the width of the stiffening device is wider than the first and/or second width of the respective separation interface section.
  • the stiffening device protrudes in the circumferential direction beyond the first and/or second separation interface section. It can be preferred that the stiffening device protrudes beyond the first and/or second separation interface. In particular, it can be preferred that the stiffening device projects beyond the first and/or second separation interface section in the axial direction.
  • the respective stiffening device is preferably mechanically connected to the magnet carrier segment.
  • the respective stiffening device is non-positively and/or materially and/or positively connected to the magnet carrier segment.
  • the respective stiffening device is mechanically connected to the outer peripheral surface of the rotor.
  • the respective stiffening device is preferably welded to the magnet carrier segment. It can also be preferred that the respective stiffening device is screwed to the magnet carrier segment. Additionally or alternatively, in a preferred embodiment of the rotor segment, the respective stiffening device can be positively connected to the magnet carrier segment by correspondingly provided projections and recesses.
  • a stiffening device arranged in the area of the first separating interface section is preferably configured identically to a stiffening device arranged in the area of the second separating interface section.
  • the arrangement of the stiffening device according to the invention in the area of the first and/or second separation interface section is to be understood in particular as additional stiffening.
  • a stiffening is to be understood that the connecting section does not have.
  • the rotor segment can have stiffening arrangements which have both the first and/or second separation interface section and the connection section. In such a stiffening arrangement, preferably no stiffening device can be seen, which is arranged in the area of the first and/or second separation interface section.
  • a stiffening arrangement is designed differently from the stiffening device according to the invention.
  • the stiffening device arranged in the area of the first and/or second separation interface section has the advantage that the rotor segment stiffens the rotor segment in these sections, in particular in the area of the first and/or second separation interface.
  • the stiffening device has the particular effect that in the area of the first and/or second separation interface section the air gap between a rotor segment and a stator segment of a generator segment of a segmented generator corresponds to an air gap between the rotor segment and the stator segment in the area of the connecting section.
  • the air gap “set” for operation of the segmented generator can be maintained with the stiffening device.
  • the stiffening device prevents the formation of dents in the area of the first and/or second separation interface section, in particular when the generator segments of a segmented generator are stored or transported separately from one another and are not assembled as a ring-shaped segmented generator.
  • the stiffening device facilitates the assembly or assembly of the generator segments to form a segmented generator, since the connecting devices at the first and/or second separation interface of adjacent generator segments are aligned flat with respect to one another.
  • the stiffening device locally stiffens the magnet carrier segment in the area of the first and/or second separation interface section compared to the area of the magnet carrier segment in the connection section.
  • the magnet carrier segment with the stiffening device in the area of the first separation interface section has a first stiffness
  • the magnet carrier segment with the stiffening device in the area of the second separation interface section has a second stiffness
  • the connecting section has a third stiffness
  • the third stiffness of the connecting portion is less than the first and/or second stiffness of the first and/or second severing interface portion
  • the third stiffness of the connecting portion corresponds to the first and/or second stiffness of the first and/or second severing interface portion
  • the third stiffness of the connection section is greater than the first and/or second stiffness of the first and/or second separation interface section.
  • first stiffness varies between a first minimum and maximum stiffness.
  • second rigidity varies between a second minimum and maximum rigidity.
  • third stiffness varies between a third minimum and maximum stiffness.
  • first and/or second and/or third stiffness of the respective section varies in the circumferential direction and/or the axial direction and/or the radial direction.
  • first and/or second separation interface section and/or the connection section, the first and/or second and/or third stiffness of which varies have a first and/or second and/or third average stiffness.
  • the respective average stiffness lies between the respective minimum and maximum stiffness.
  • the respective stiffness is an average of the stiffnesses of a respective section.
  • the respective mean stiffness corresponds to the mean value of the respective minimum and maximum stiffness of a respective section.
  • the first and/or second stiffness in the area of the first and/or second separation interface section is at least 105%, 110%, 120%, 130%, 140%, 150%, 200% or more.
  • the first and/or second stiffness in the area of the first and/or second separation interface section is at most 500%, 400%, 300%, 200%, 150%, 140%, 130%, 120%, 110% or 105%.
  • the first and/or second mean stiffness in the region of the first and/or second separation interface section is at least 105%, 110%, 120%, 130%, 140%, 150%, 200% or more.
  • the first and/or second average stiffness in the area of the first and/or second separation interface section is at most 500%, 400%, 300%, 200%, 150%, 140%, 130%, 120%, 110% or 105% .
  • the rigidity of the magnet carrier segment without the stiffening device is lower in the area of the first and/or second separation interface section than in the area of the connection section.
  • the rigidity of the respective sections describes in particular the resistance of the respective sections to elastic deformation, for example dent formation, which can be caused by the arrangement of permanent magnets.
  • the rigidity of the respective sections should be selected such that the magnetic force acting between the rotor segment and stator segment due to the arrangement of permanent magnets causes only a deformation of the rotor segment, in particular the magnet carrier segment, within specified tolerances.
  • the rigidity of the respective sections includes an extensional rigidity and/or a shearing rigidity and/or a bending rigidity and/or a torsional rigidity.
  • the first separation interface section and the second separation interface section are of essentially the same design.
  • the rotor segment can be manufactured particularly cost-effectively.
  • the use of identical parts allows economies of scale to be achieved when purchasing identical parts.
  • the essentially identical design of the first and/or second separation interface section minimizes the susceptibility to errors in the manufacture of the rotor segment.
  • a rotor segment designed in this way facilitates assembly at the installation site of the segmented generator.
  • the magnet carrier segment and the stiffening device in the first and/or second separation interface section form a cross-section with a cross-sectional area and/or a cross-sectional shape that differs from a cross-sectional area and/or a cross-sectional shape of a cross-section of the magnet carrier segment in the connection section.
  • the cross-sectional area of the first and/or second separation interface section is larger than the cross-sectional area of the connection section; and/or the cross section of the first and/or second separation interface section has a moment of inertia of area and/or a moment of torsional inertia which is greater than a moment of inertia of area and/or a moment of torsional inertia of the cross section of the connection section.
  • this has the effect that the first and/or second stiffness of the first and/or second separation interface section is greater than the third stiffness of the connection section.
  • the stiffening device has a material with a modulus of elasticity or consists of the material with the modulus of elasticity that is greater than a modulus of elasticity of a material that has the magnet carrier segment or from which the magnet carrier segment consists .
  • the first and/or second length of the first and/or second separation interface section corresponds to at least 10%, preferably at least 20%, and at most 50%, preferably at most 40%, of the segment length; and/or the magnet carrier segment has a segment width along an axis of rotation and the stiffening device has a width that corresponds to at least 30%, preferably at least 50%, and at most 80%, preferably at most 100%, of the segment width.
  • the first and/or second height of the first and/or second separation interface section corresponds to at least 110%, preferably at least 120%, preferably at least 150%, preferably at least 200%, and at most 500%, preferably at most 400%. preferably maximum 300%, the third height of the connecting portion of the magnet carrier segment.
  • the first and/or second height of the first and/or second separation interface section preferably corresponds to a height of the magnet carrier segment and/or the height of the stiffening device.
  • the first and/or second width and/or height in the circumferential direction of the first and/or second separating interface section, in particular of the magnet carrier segment and/or the stiffening device in the area of the first and/or second separating interface section, starting from the first and /or second separation interface varies in the direction of the connecting portion, preferably decreases.
  • the first and/or second width and/or height continuously, preferably linearly and/or convexly and/or concavely decreases in the circumferential direction.
  • the first and/or second width and/or height of the first and/or second separation interface section at the transition to the connection section preferably corresponds to the third width and/or height of the connection section. It can also be preferred that the height and/or width of the connecting section to the first and/or second separation interface section changes discontinuously, in particular in steps.
  • a continuous transition from the first and/or second separation interface section to the connection section preferably minimizes the notch effect.
  • the stiffening device has a flat stiffening element; and/or one or more axial webs, which have a main extent along the axis of rotation; and/or one or more circumferential webs having a main extension in the circumferential direction orthogonal to the axis of rotation; and/or one or more diagonal webs, which have a main extension diagonal to the circumferential direction and the axis of rotation.
  • the planar stiffening element preferably extends over the first and/or second length and/or width of the first and/or second separation interface section.
  • the axial webs and/or circumferential webs and/or diagonal webs preferably have an I-shaped and/or U-shaped and/or Z-shaped and/or L-shaped cross-sectional profile. It may also be preferred that the axial webs and / or circumferential webs and / or Diagonal webs form a hollow profile in cross section.
  • the hollow profiles can be rectangular and/or square and/or tubular hollow profiles.
  • two flat stiffening elements and two circumferential webs and/or two axial webs can also form a box-shaped profile.
  • the axial webs of a stiffening device with a plurality of axial webs have a different length and/or width and/or height. It can be preferred that the peripheral webs of a stiffening device with a plurality of axial webs have a different length and/or width and/or height. It can be preferred that the diagonal webs of a stiffening device with a plurality of axial webs have a different length and/or width and/or height.
  • a plurality of axial webs are arranged equidistantly from one another in the circumferential direction; and/or a plurality of circumferential webs arranged equidistantly from one another in the axial direction; and/or the planar stiffening element is arranged spaced parallel to the circumferential surface of the rotor.
  • the stiffening device is welded and/or screwed to the peripheral surface of the rotor.
  • the stiffening device can be adhesively bonded to the peripheral surface of the rotor.
  • the rotor segment comprises a stiffening ring segment, which has an essential main direction of extension in the circumferential direction and/or a radial direction, for stiffening the rotor segment.
  • the stiffening ring segment is also known as a stiffening disk.
  • the stiffening ring segment is preferably arranged between the magnet carrier segment and the rotor base body flange of a bearing unit.
  • the stiffening ring segment is arranged at a distance from the rotor support section in the axial direction.
  • a stator segment is arranged between the rotor support portion and the stiffening ring segment in the axial direction.
  • the stiffening ring segment prevents deformation of the rotor segment, in particular of the magnet carrier segment, in the radial direction. In particular, this allows a set for operation air gap between the Rotor segment and the stator segment of a generator segment of a segmented generator are held in the circumferential direction. Furthermore, the higher rigidity of the rotor segment resulting from the stiffening ring segment leads to a better ability to assemble adjacent rotor segments to form an annular segmented rotor.
  • the object is achieved by a generator segment of a segmented generator for a wind turbine according to claim 12. It is to be understood that the generator segment is a generator segment for a segmented generator for a wind turbine.
  • Such a generator segment of a segmented generator of a wind energy plant comprises, as already described above, a rotor segment of a rotor.
  • the rotor segment is a rotor segment according to the invention as described above and/or a preferred development of the rotor segment as described above.
  • the generator segment includes a stator segment of a stator.
  • the stator segment is arranged radially on the inside of the rotor segment in relation to the axis of rotation.
  • the rotor segment encloses the stator segment. This advantageously leads to a more powerful generator.
  • the object is achieved with a wind energy plant according to claim 15.
  • Such a wind energy installation comprises a segmented generator according to the invention, in particular a segmented generator according to one of the previously described embodiments or a combination thereof.
  • FIG. 1 shows a schematic, three-dimensional view of an exemplary embodiment of a wind energy plant in an operating state
  • FIG. 2 shows a schematic, three-dimensional view of an exemplary embodiment of a generator segment with a preferred embodiment of a stiffening device
  • FIG. 3 shows a schematic, three-dimensional view of an exemplary embodiment of a segmented generator with a further preferred embodiment of a stiffening device
  • 5a, b, c a two-dimensional front, side and plan view of a connecting section of the generator segment shown in FIG. 4;
  • Fig. 6a,b,c a two-dimensional front, side and plan view of a first and second separation interface section of the generator segment shown in Fig. 4;
  • Fig. 7 a schematic, three-dimensional view of a further example
  • Embodiment of a generator segment Embodiment of a generator segment.
  • FIG. 1 shows a schematic, three-dimensional view of an exemplary embodiment of a wind energy plant.
  • FIG. 1 shows in particular a wind energy plant 100 with a tower 102 and a nacelle 104.
  • a rotor 106 with three rotor blades 108 and a spinner 110 is arranged on the nacelle 104.
  • the rotor 106 is in operation rotated by the wind and thereby drives a generator in the nacelle 104.
  • the tower 102 has, in particular, wind turbine steel tower ring segments with flange segments. As a result, the tower 102 is constructed using components that are easy to transport and that can also be connected with great precision and with little effort.
  • FIG. 3 shows a schematic, three-dimensional view of a preferred embodiment of a generator segment 10 of a segmented generator 1 composed of two generator segments 10 .
  • the generator segments 10 have a rotor segment 200 and a stator segment 300 .
  • the generator segments 10 shown in FIGS. 2 and 3 are designed for a segmented generator designed as an external rotor.
  • the stator segment 300 is arranged within the rotor segment 200 .
  • the generator segments 10 or the rotor segments 200 and stator segments 300 extend in a circumferential direction U between a first separating interface T1 and a second separating interface T2.
  • the first and second separation interface T1, T2 define a first and second separation interface plane, within which the axis of rotation D extends.
  • the first and second separating interfaces T1, T2 of the generator segment 10 have a connecting device which is designed to connect adjacent generator segments 10, which are arranged to form a segmented generator 1, to one another.
  • the connecting device of the first and second separation interfaces T1, T2 is designed to mechanically connect adjacent generator segments 10, ie adjacent rotor segments 200 and adjacent stator segments 300.
  • the first and second separation interfaces T1, T2 have a flange connection and a screw connection as a connecting device. From the generator segment 10 shown schematically in FIG. 2, a connection device designed with flange connections at the first and second separation interface T1, T2 can be seen.
  • the two generator segments 10 are connected to one another at the respective separation interfaces T1, T2 via the corresponding flange connections with screw connections in the circumferential direction.
  • the rotor segments 200 shown in FIGS. 2 and 3 have a magnet carrier segment 210 with a circumferential rotor surface 212 .
  • a stiffening device 400 is arranged on the rotor peripheral surface 212, in particular the rotor outer peripheral surface, in the area of the first and second separation interface section A1, A2.
  • the stiffening devices 400 in FIG. 2 as well as in FIG. 3 extend in the first and second separation interface section A1, A2 with a first and second length L1, L2. In particular, the stiffening devices 400 extend with the same length in the first and second separation interface sections A1, A2.
  • the stiffening devices 400 arranged in the area of the first and second separation interface sections A1 , A2 are of identical design.
  • the first and second length L1, L2 of the first and second separation interface section A1, A2 corresponds to one sixth of the segment length of the rotor segment 200 in the preferred embodiments of the generator segments 10 shown in Figures 2 and 3.
  • the third length L3 of the connecting sections A3 of these preferred embodiments of the generator segments 10 correspond to four sixths of the segment length of the rotor segment 200.
  • the preferred embodiment of the stiffening device 400 shown in FIG. 2 has three circumferential webs which are arranged parallel to one another and spaced apart in the axial direction A and which are fastened to the magnet carrier segment 210 with screw connections.
  • FIG. 3 shows the stiffening device 400 in a further preferred embodiment as a flatly extending stiffening element which is connected to the magnet carrier segment 210 by means of a welded connection.
  • the stiffening device 400 arranged in the region of the first separation interface section A1 has a length in the circumferential direction U and a width in the axial direction A that corresponds to the first length and first width of the first separation interface section corresponds to A1.
  • FIG. 4 shows a schematic, two-dimensional view of a further exemplary embodiment of a generator segment 10.
  • the rotor segment 200 has a first and second separation interface section A1, A2, between which a connecting section A3 extends.
  • the first and second separating interface sections A1, A2 extend, starting from a first and second separating interface T1, T2, in the direction of the connecting section A3.
  • the first and second lengths L1, L2 of the first and second separation interface sections A1, A2 and the third length L3 of the connection section A3 each correspond to one third of the segment length of the rotor segment 200.
  • the first and second separation interface portions A1, A2 and the connection portion A3 extend in the circumferential direction with the same length.
  • the stiffening devices 400 arranged in the region of the first and second separation interface section A1, A2 extend with the first or second length of the respective separation interface section A1, A2.
  • FIGS. 5a, b, c A schematic two-dimensional front, side and top view of the connection section of the generator segments 10 shown in FIG. 3 is shown in FIGS. 5a, b, c.
  • FIGS. 5a, b, c is a schematic two-dimensional front, side and top view of the first and second separation interface section A1, A2 of the generator segments 10 shown in Figure 3 is shown.
  • Circumferential webs which extend in the circumferential direction U, and axial webs, which extend in the axial direction A along the axis of rotation D, are arranged on the rotor outer circumferential surface 212 of the magnet carrier segment 210 . These are arranged both in the area of the connecting section A3 and in the area of the first and second separation interface section A1, A2. This can be seen, for example, from the two generator segments 10 shown in FIG. Corresponding axial webs and circumferential webs are arranged in the upper generator segment 10 in the view of FIG. 3 in the region of the connecting section A3. These are covered by the stiffening device 400 in the first separation interface section A1. In the lower generator segment 10 shown in FIG.
  • the stiffening device for the second separation interface section A2 is not shown, so that the arrangement of the axial webs and circumferential webs can be seen here.
  • the axial and circumferential webs which extend uniformly in the circumferential direction between the first and second separation interfaces T1, T2 and are arranged on the rotor circumferential surface 212, can also be seen schematically in FIGS.
  • FIG. 7 shows a schematic, three-dimensional view of a further exemplary embodiment of a segmented generator 1 or of two generator segments 10 .
  • the two generator segments 10 extend through 180° in the circumferential direction.
  • the two generator segments 10 have a connecting device at the first and second separation interfaces T1, T2, via which the two generator segments 10 arranged adjacent in the circumferential direction are connected to one another.
  • both generator segments 10 have two circumferential webs as a stiffening device 400 , which have a main direction of extension in the circumferential direction U.
  • the two circumferential webs are arranged between three webs running in the circumferential direction, which extend from the first to the second separation interface on the rotor outer circumferential surface 212 of the magnet carrier segment 210.
  • both the two separating interface sections A1 , A2 and the connecting section A3 which extends between the two separating interface sections A1 , A2 , have the three circumferential webs on the rotor outer circumferential surface 212 of the magnet carrier segment 210 .
  • the stiffening device 400 according to the invention cannot be seen in these three webs, which extend from the first to the second separation interface T1, T2. Rather, the stiffening device according to the invention can only be seen in the two circumferential webs, which are arranged exclusively in the first and second separating interface section A1, A2, which stiffens the first and second separating interface section A1, A2 of the generator segment 10 in relation to the connecting section A3, in particular locally stiffens it.
  • stator segment 400 stiffening device A axial direction A1 first separation interface section A2 second separation interface section A3 connection section D axis of rotation L1 first length L2 second length L3 third length R radial direction

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne un segment de rotor d'un générateur segmenté (1), en particulier d'un générateur rotatif segmenté (1) excité en permanence, d'une éolienne, un segment de support d'aimant qui présente une surface périphérique de rotor (212), en particulier une surface périphérique extérieure de rotor (212), étant fourni et s'étendant dans une direction circonférentielle entre une première et une deuxième interface de séparation (T1,T2) sur une longueur de segment donnée, la surface périphérique de rotor (212) comprenant une première partie d'interface de séparation (Al) présentant une première longueur (LI) à partir de la première interface de séparation (TI) vers la deuxième interface de séparation (T2) dans la direction circonférentielle ; et une deuxième partie d'interface de séparation (A2) présentant une deuxième longueur à partir de la deuxième interface de séparation (T2) vers la première interface de séparation (TI) dans la direction circonférentielle ; et une partie de liaison (A3) présentant une troisième longueur, qui s'étend entre les première et deuxième interfaces de séparation (T1,T2) ; des dispositifs de rigidification (400) pour rigidifier le segment support d'aimant étant respectivement disposés sur la surface périphérique du rotor (212), dans la zone de la première partie d'interface de séparation (A1) et dans la zone de la deuxième partie d'interface de séparation (A2).
EP21840581.9A 2020-12-18 2021-12-17 Générateur segmenté, segment de rotor, segment de générateur et éolienne Pending EP4264791A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20215468.8A EP4016804A1 (fr) 2020-12-18 2020-12-18 Générateur segmenté, segment de rotor, segment de générateur et éolienne
PCT/EP2021/086448 WO2022129496A1 (fr) 2020-12-18 2021-12-17 Générateur segmenté, segment de rotor, segment de générateur et éolienne

Publications (1)

Publication Number Publication Date
EP4264791A1 true EP4264791A1 (fr) 2023-10-25

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Application Number Title Priority Date Filing Date
EP20215468.8A Withdrawn EP4016804A1 (fr) 2020-12-18 2020-12-18 Générateur segmenté, segment de rotor, segment de générateur et éolienne
EP21840581.9A Pending EP4264791A1 (fr) 2020-12-18 2021-12-17 Générateur segmenté, segment de rotor, segment de générateur et éolienne

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EP20215468.8A Withdrawn EP4016804A1 (fr) 2020-12-18 2020-12-18 Générateur segmenté, segment de rotor, segment de générateur et éolienne

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US (1) US20240097515A1 (fr)
EP (2) EP4016804A1 (fr)
CN (1) CN116601849A (fr)
WO (1) WO2022129496A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1779494A4 (fr) * 2004-07-19 2016-09-07 Switch Electrical Machines Oy Machine electrique
DE102009032885A1 (de) 2009-07-13 2011-02-03 Siemens Aktiengesellschaft Ringförmiger Rotor für eine elektrische Maschine
US9154024B2 (en) * 2010-06-02 2015-10-06 Boulder Wind Power, Inc. Systems and methods for improved direct drive generators
EP2661553B1 (fr) * 2011-01-05 2017-09-27 Vestas Wind Systems A/S Générateur à entraînement direct
DK2508749T3 (da) * 2011-04-04 2013-12-16 Siemens Ag Fremgangsmåde til montering af en elektrisk maskine
EP2731232B1 (fr) * 2012-11-08 2019-01-30 GE Renewable Technologies Wind B.V. Générateur pour éolienne
DE102017206873A1 (de) * 2017-04-24 2018-10-25 Siemens Wind Power A/S Stützstruktursegment für einen Generator einer Windturbine
CN108964301B (zh) * 2018-06-06 2020-03-03 新疆金风科技股份有限公司 转子、电机及风力发电机组
CN108923557B (zh) * 2018-08-13 2020-06-26 中车株洲电机有限公司 一种永磁电机及其模块式转子结构
EP3637587A1 (fr) * 2018-10-10 2020-04-15 youWINenergy GmbH Générateur pour installation d'éolienne
EP3926792A1 (fr) * 2020-06-15 2021-12-22 Siemens Gamesa Renewable Energy A/S Structure de support de segment pour générateur d'éolienne
CN112018968B (zh) * 2020-07-31 2022-12-20 西安中车永电捷力风能有限公司 抗磁力结构

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Publication number Publication date
CN116601849A (zh) 2023-08-15
WO2022129496A1 (fr) 2022-06-23
EP4016804A1 (fr) 2022-06-22
US20240097515A1 (en) 2024-03-21
WO2022129496A8 (fr) 2022-09-01

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