Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K9/00—Arrangements for cooling or ventilating
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K9/00—Arrangements for cooling or ventilating
  • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
  • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/46—Fastening of windings on the stator or rotor structure
  • H02K3/52—Fastening salient pole windings or connections thereto
• • 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
• • 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
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K9/00—Arrangements for cooling or ventilating
  • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
  • H02K9/227—Heat sinks
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
  • H02K2203/12—Machines characterised by the bobbins for supporting the windings
• • 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
• • 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 present invention relates to a pole piece of an electrical machine, in particular a rotor of an electrical generator of a wind turbine.
• the present invention relates to a generator, in particular a ring generator, as well as a Polschuhkühl redesign and a wind turbine.
• the present invention relates to a method for producing a pole piece and to a method for operating a power plant.
• a pole piece generally serves to guide a magnetic field and to let out and distribute the magnetic field lines in a defined shape.
• a pole piece consists of a material with a high permeability.
• pole shoes are arranged in the stator and / or in the rotor of the generator.
• a pole piece is in the following a Polschuhblechun, which is constructed to avoid or at least reduce eddy currents from many individual, mutually insulated laminations understood.
• Such a pole piece essentially consists of a pole shoe head and a pole shoe body.
• a generator cooling is known.
• the document relates to a power plant with a ring generator and a nacelle housing of the wind turbine surrounding the ring generator, the nacelle housing having a thermally conductive housing section in the region of the bovine generator and a predetermined distance being formed between the outer circumference of the ring generator and the thermally conductive housing section, so that the heat energy is above or below the wind turbine is transmitted through air.
• water cooling or combined air-water cooling are known.
• Such prior art solutions sometimes have a low cooling capacity or are very expensive and expensive due to design changes to the generator.
• the following publications are generally referred to: CH 425 984 A, US Pat. No. 6,774,504 B1 and EP 0 793 870 B1.
• Such a pole piece of an electrical machine in particular a rotor of an electrical generator of a wind turbine, has a pole shoe body for guiding a magnetic field and for receiving a winding for guiding an electric current, in particular an exciter current, for generating the magnetic field.
• the PolschuhSystem is either completely or partially surrounded by at least one heat sink, which can also be called Polschuhkühlvik, cooled to cool the pole piece.
• the heat sink is disposed between the pole piece and the Wcklung. The Wcklung can be part of the pole piece.
• the heat sink is preferably formed so that it receives the winding and thus forms a cooled, in particular water-cooled bobbin.
• the PolschuhSuper is for example laminated and made of iron.
• the pole shoe body is in the form of a cuboid, in which the corners are recessed.
• the recess material of the winding is saved.
• a pole piece is fastened, for example, in a rotor of a generator of a wind power plant, by arranging a cooling system, the excitation current which is fed into the winding and thus the power of the generator can be increased. Because the heat sink is located between the pole piece body and the winding, a close thermal contact between the heat sink and the heat source, ie the winding, is achieved and the heat source is cooled directly. The heat is thus dissipated before the pole piece is too warm, so that there is no damage due to overheating of the winding. Warming that occurs in the pole shoe body, such as by eddy current losses and iron losses can also get from the PolschuhMech to the heat sink and be removed in a simple manner.
• the heat sink is designed as a wound body.
• the winding body is preferably adapted to the PolschuhSystem and is pushed onto this.
• the winding is arranged on the winding body.
• the heat sink between the Polschuh- body and the winding and the heat of the heat source can be dissipated directly.
• a winding body and a heat sink could be arranged between the winding and the pole shoe body.
• the pole piece has an electrical insulation means to electrically insulate the heat sink against the winding and / or to conduct heat from the heat to the heat sink.
• the insulating means may comprise, for example, an insulating film, mica disks or ceramic plates.
• electrically insulating layers of oxides such as, for example, aluminum oxide, are also suitable as passivation layers.
• the heat sink is designed to be hollow for guiding a cooling medium.
• a cooling medium in particular a cooling liquid is used.
• a cooling liquid may include, for example, water.
• cooling liquid has an antifreeze agent such as glycol. This ensures that the cooling liquid does not freeze even when the electric machine is at a standstill.
• the cooling medium may also be gaseous or at least partially have solid substances or substance mixtures, or be formed for example as a gel.
• the heat sink is made of aluminum.
• Aluminum has the advantage that it is a good heat-conductive metal and thus the heat loss can be derived by heat conduction from the heat-generating component, so the winding.
• the heat sink could also be made of copper, which is also a good heat conductive metal.
• the heat sink at least two connection points for connection to a cooling system, so that the cooling system can form a cooling circuit together with the heat sink.
• one or the cooling medium is introduced via one of the connection points and the cooling medium is discharged via one of the other connection points.
• the cooling medium flows into the heat sink with an inlet temperature which is lower than the temperature of the heat source, and there is a heat transfer from the warmer to the colder medium, ie to the cooling medium.
• the heated cooling medium is removed and introduced after cooling again in the cooling circuit.
• the cooling takes place for example by means of a recooler, which emits the dissipated heat to the environment.
• Such a recooler is arranged, for example, in a wind turbine in or on the nacelle of the wind turbine. If the pole shoe body is provided with recesses at its corners, as already described above, the connection points of the heat sink can be arranged in these recesses, or in two of these recesses, and thereby make efficient use of the space.
• the pole piece is prepared for use in a salient pole machine, in particular a ring generator.
• a salient pole machine is a three-phase synchronous machine designed for low speeds, which is used as a generator, for example, in wind turbines.
• a ring generator is characterized by a high number of rotor and stator poles, which are arranged annularly along the air gap. Due to the large number of poles, for example, 30, 40, in particular 48, 50 and more rotor poles can be provided, a very slowly rotating operation is made possible, in which the generator with less than 30, 20, 15 and in particular less than 10 U per minute turns.
• the invention comprises a generator, in particular a ring generator, for converting kinetic energy into electrical energy with a stator and a rotor.
• the stator and / or the rotor at least two pole pieces according to the invention.
• a ring generator for example a wind energy plant
• the excitation of the magnetic field takes place via the pole shoes attached to the rotor. If these pole pieces are cooled directly, the power of the wind turbine can be increased thereby or an increase can be made possible by the fact that power loss generated by a high excitation current is dissipated.
• the life of the wind turbine can be increased by a good cooling and therefore by avoiding too high temperatures.
• liquid cooling instead of cooling by ambient air, exposure to the ambient air can be avoided. Moisture and dirt can be kept away from the system.
• the at least two pole pieces on the rotor or the stator in each case a so arranged around the respective heat sink winding, that the heat sink between PolschuhSystem and winding is arranged. Direct cooling of the heat source is thus possible.
• the invention proposes a Polschuhksselêtêtterrorism for cooling a pole piece and for use with a pole piece according to the invention.
• a Polschuhksselêtêtterrorism is designed as a rigid body and adapted to a pole piece, in particular to the Polschuhscale a pole piece.
• the Polschuhksselêtterrorism can be used for various embodiments of the pole piece, such as various sizes or shapes. In this case, the pole piece learns even little or no structural changes.
• the pole shoe body After mounting the heat sink and the insulating foil, the pole shoe body can be provided with the winding and introduced into the electrical machine. Only the connections for the cooling circuit and the associated cooling system result in a different structural design compared to generators without or with other cooling.
• a receiving space for receiving a Polschuh moments has or forms.
• a receiving space is understood to be a space defined by the shape of the heat sink, which is intended to receive at least the part of the pole shoe body which is separated from the body Polschuhkühlmaschine should be surrounded.
• the heat sink which is preferably designed as a rigid body, can be pushed without great effort, for example, on the pole piece.
• a wind turbine with a generator according to the invention is proposed according to the invention.
• the required heat output can be dissipated by a cooling system and thus the performance can be increased.
• a method for producing a pole piece according to the invention comprises the following steps: 1. First, one or the heat sink is arranged on one or the pole shoe body for cooling the pole piece. This can be done for example by pushing on the pole piece.
• the heat sink is arranged on the pole shoe body in such a way that it completely or partially surrounds the pole shoe body and is arranged between the heat sink and the pole shoe body.
• the general manufacturing method of a pole piece is supplemented only by the arrangement of the heat sink.
• the generator is cooled by means of a cooling medium, in particular by a cooling liquid which is pumped through at least one Polschuhkühlmaschine.
• the medium for cooling the generator is preferably routed via a connection point or points to a recooler.
• This recooler is located in or on the nacelle of the wind turbine, preferably on at least one outer side of the nacelle.
• Such a recooler for example, exposed to an air flow and has a sufficiently large surface area to ensure a required heat dissipation.
• the cooling medium in the recooler can be cooled and fed via one or more connection terminals. be pumped back into the Polschuhkühlmaschine to continue to dissipate the heat loss of the pole piece can.
• Figure 1 shows a wound body with a Polschuhkühl redesign invention.
• Figure 2 shows an embodiment of a Polschuhkühl stressess.
• Figure 3 shows another embodiment of a Polschuhkühl stressess.
• FIG. 4 shows a connection region of a pole shoe cooling body according to a further embodiment.
• FIG. 5 shows a pole shoe cooling body with a pole shoe body of a pole shoe according to a further embodiment.
• FIG. 6 shows an embodiment of a pole piece according to the invention.
• Figure 7 shows a section of a pole piece according to another embodiment.
• FIG. 1 shows a winding body 100 for a pole piece with a heat sink in the form of a Polschuhkühlianus 101, two connection points 102 and a receiving space 103.
• the Polschuhkühlterrorism 101 which consists of three via the connection points 102 interconnected part bodies 106, already on the winding body 100th appropriate.
• a receiving space 103 is provided to accommodate a pole piece.
• the heat sink 101 encloses the receiving space 103 and thus completely after insertion of the Polschuhworkss the Polschuhoasa, so that a uniform cooling is ensured.
• connection points 102 on the heat sink 101.
• the cooling medium is admitted, for example, via one of the connection points 102 led a recooler and cooled there. Via the second connection point 102, the cooling medium is pumped back into the heat sink 101.
• the illustrated winding body 100 is pushed onto a pole shoe body of a pole piece.
• an insulation means not shown here is applied, on which in turn a winding is arranged.
• the thus prepared pole piece can then be attached to the appropriate location of the electrical machine.
• FIG. 2 shows a rigid heat sink 201, which encompasses three likewise rigid partial bodies 206.
• the heat sink 201 defines a receiving space 203 for receiving a PolschuhMechs.
• the three partial heat sinks each form a rigid, circumferential and hollow band-like element, can be passed through the water as a cooling liquid. If the pole shoe body is inserted into the receiving space 203, the heat sink 201 encloses this almost completely, so that a uniform cooling is ensured.
• connection points 202 can be seen in FIG. As a result, the cooling medium can be introduced or removed into the heat sink 201.
• FIG. 3 shows a further embodiment of a heat sink 301 with three part bodies 306.
• the latter also has a receiving space 303 for receiving a pole shoe body and two connection points 302 for supplying or discharging a cooling medium.
• the heat sinks 201 according to FIGS. 2 and 301 according to FIG. 3 differ essentially by the size of the pole piece or pole shoe body of the pole piece to be accommodated.
• FIG. 4 shows a partial section of a heat sink 401, which consists of three partial bodies 406 brought together at the connection points 402.
• the connection points 402 are tubular. Within the tubular connection points 402, connecting points 405 to the hollow partial bodies 406 can be seen. In this way, the cooling medium can be pumped from one of the connection points 402 via the connection points 405 into the heat sink 401, in order to flow through the latter and dissipate the heat. By the other of the two connection points 402, the cooling medium is discharged via the connection points 405 again.
• a receiving space 403 for receiving a pole piece body is partially shown in FIG.
• FIG. 5 shows a pole shoe body 504 of a pole shoe. Furthermore, a heat sink 501 with three partial bodies 506, which encloses the pole shoe body 504, can be seen.
• the pole piece body 504 is made of a material having a high permeability such as iron. In addition, it is made of laminated mesh to avoid or reduce eddy currents within the pole piece.
• the pole shoe body 504 is formed in the shape of a cuboid, in which the respective corners 507 are flattened. In the area of these flattened corners, connections for connecting the heat sink to a cooling circuit can be arranged.
• connection points 502 for guiding the cooling medium to or from a recooler can be seen.
• the pole piece may also comprise a package, not shown here, which is attached to the heat sink 501.
• the pole piece can be installed in the electric machine, for example in a rotor of a generator of a wind turbine.
• FIG. 6 shows an embodiment of a pole shoe 600 according to the invention.
• the pole shoe 600 is designed in the shape of an arrow in the region of its pole shoe head 610.
• the illustrated pole shoe head 610 and pole shoe body 620 together form the pole shoe 600.
• the pole shoe 600 is preferably produced from individual sheet metal laminations which are insulated from one another. Therefore, the pole piece 600 is also referred to as a Polschuhblechb.
• Polschuhkühlève is arranged, which surrounds the Polschuh Sciences 620 wholly or partially. Then a winding is attached, which is directly cooled by the close thermal contact with the heat sink.
• FIG. 7 shows a pole shoe body 704 of a pole shoe. Furthermore, a heat sink 701 can be seen, which is not divided into partial bodies, but is formed as a body. The heat sink 701 encloses the pole shoe body 704 substantially from three sides. The cutout of the pole shoe body 704 shows two corner regions 707, which respectively have a recess 717. In one of these two recesses 717, a connection 727 in the form of a connection pipe is provided for connecting the heat sink 701 in order to connect the heat sink 701 to a cooling circuit. In the region of the further recess, a corresponding connection 727 is still missing and guide channels 730 can be seen, which are designed to guide a cooling medium in the cooling body 701.
• connection 727 is to be provided on completion, which is arranged in one of the recesses 717 and is thereby at least partially integrated into the pole shoe body 704.
• the heat sink can here, possibly supplemented by insulation, take a winding and thereby form a cooled bobbin.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Energy (AREA)
• Sustainable Development (AREA)
• Motor Or Generator Cooling System (AREA)
• Iron Core Of Rotating Electric Machines (AREA)
• Wind Motors (AREA)
• Synchronous Machinery (AREA)
• Insulation, Fastening Of Motor, Generator Windings (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=45937265

Family Applications (1)

Country Status (13)

Families Citing this family (9)

Family Cites Families (20)

• 2011
  • 2011-04-01 DE DE102011006681A patent/DE102011006681A1/de not_active Ceased
• 2012
  • 2012-03-26 AU AU2012234318A patent/AU2012234318B2/en not_active Ceased
  • 2012-03-26 RU RU2013148723/07A patent/RU2013148723A/ru not_active Application Discontinuation
  • 2012-03-26 CA CA2830803A patent/CA2830803A1/en not_active Abandoned
  • 2012-03-26 KR KR1020137028530A patent/KR101546175B1/ko not_active IP Right Cessation
  • 2012-03-26 EP EP12713017A patent/EP2572442A2/de not_active Withdrawn
  • 2012-03-26 MX MX2013011321A patent/MX2013011321A/es not_active Application Discontinuation
  • 2012-03-26 US US14/007,936 patent/US20140091650A1/en not_active Abandoned
  • 2012-03-26 CN CN2012800172581A patent/CN103460567A/zh active Pending
  • 2012-03-26 BR BR112013024947A patent/BR112013024947A2/pt not_active IP Right Cessation
  • 2012-03-26 WO PCT/EP2012/055350 patent/WO2012130814A2/de active Application Filing
  • 2012-03-26 JP JP2014501565A patent/JP5746417B2/ja not_active Expired - Fee Related
• 2013
  • 2013-09-27 CL CL2013002800A patent/CL2013002800A1/es unknown

Non-Patent Citations (1)

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