EP3058290A2 - Refroidissement d'une machine électrique - Google Patents

Refroidissement d'une machine électrique

Info

Publication number
EP3058290A2
EP3058290A2 EP15702665.9A EP15702665A EP3058290A2 EP 3058290 A2 EP3058290 A2 EP 3058290A2 EP 15702665 A EP15702665 A EP 15702665A EP 3058290 A2 EP3058290 A2 EP 3058290A2
Authority
EP
European Patent Office
Prior art keywords
cooling medium
cooling
heat transfer
electrical machine
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15702665.9A
Other languages
German (de)
English (en)
Inventor
Horst KÜMMLEE
Frank Seibicke
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP15702665.9A priority Critical patent/EP3058290A2/fr
Publication of EP3058290A2 publication Critical patent/EP3058290A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B21/00—Machines, plants or systems, using electric or magnetic effects
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
    • F25B2321/002—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects
    • F25B2321/0022—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects with a rotating or otherwise moving magnet
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • the invention relates to an electrical machine comprising a first cooling section, in which a first cooling medium is provided for cooling the electric machine, and a second cooling section, in which a second cooling medium is provided.
  • the temperature difference between the cooling medium in the primary circuit inside the machine and the cooling medium in the secondary circuit outside the machine is a characteristic ⁇ shopping times for the cooling of the machine.
  • the output ⁇ temperature is in the primary circuit generally above the cold temperature of the secondary medium.
  • the output tempera ⁇ ture of the secondary medium, and this temperature difference loading the permissible heating of the electric machine to the maximum permitted winding temperature is right.
  • the object of the invention is to provide an alternative to known cooling systems for electrical machines.
  • an electric machine of the type mentioned at the outset a ⁇ characterized in that the electrical ma- machine comprising comprises at least one active part and at least one heat trans ⁇ port element a magnetocaloric material on ⁇ , wherein the beaufschlag at least one heat transfer element at ⁇ least partially and / or at least temporarily by means of the at least one active portion having a magnetic field ⁇ bar, wherein the at least one active part and a heat transport element are designed such at least that un ⁇ ter utilization of the magnetocaloric effect waste heat from the first cooling medium is transmitted to the second cooling medium.
  • magnetocaloric material examples para ⁇ magnetic salts such as Cermagnesiumnitrat, or gadolinium (Gd) and gadolinium alloys, such as GdDy, GdTb in question.
  • Further materials can be used which as GMCE (Giant magnetocaloric effect of English: “giant magnetocaloric effect") materials are known, such as the alloys Gds (Si x GeI x) 4,
  • the first cooling section can be designed as a closed cooling circuit or primary circuit, so that replacement or mixing of the first cooling medium with the second cooling medium is at least largely prevented.
  • the second cooling section can also be designed as a closed cooling circuit or secondary circuit independently of the first cooling section.
  • the first cooling section and / or the second cooling section are designed to be open, in the sense that the first cooling medium or the second cooling medium can mix with other cooling media and does not necessarily have to be in each case a closed circuit.
  • a gaseous or liquid fluid is preferably used, for example air, water or oil, being the same or different fluids may be used as the first cooling medium and as second cooling medium.
  • One aspect of the present invention is the initial or cold temperature of the first cooling medium in the first cooling section to reduce the electric machine by using the magnetic caloric effect. At the same time, the temperature of the second cooling medium in the second cooling section is increased, so that an increased temperature difference between the first cooling medium and the second cooling medium is achievable.
  • a suitable material is heated or cooled by an increase in an impingement or by a reduction in the application of a magnetic field.
  • the Materi ⁇ al has magnetic moments without the action of a magnetic field, which have no preferred direction.
  • the material is exposed to a magnetic field, whereby the magnetic moments align and the entropy associated with the order of the magnetic moments decreases. Since the process is adiabatic, the Ge ⁇ Sammlungentropie is maintained, so that the increased entropy associated with the temperature of the Ma terials ⁇ , resulting in a temperature rise of the material ⁇ .
  • the at least partial and / or at least temporary loading of the at least one heat transfer element can be carried out by means of the at least one active part.
  • the respective active part is electrically operable and designed as an electrical winding, coil or coil pair ⁇ staltet.
  • the respective active part can also be realized by means of permanent magnets or the like.
  • an arrangement may be provided in which at least one pair of magnets, for example a coil pair or permanent magnet pair, has a gap between the pair of magnets, wherein the heat transfer element is at least partially and / or at least temporarily located in the intermediate space.
  • the respective active part can be varied over time or switched on and off in order to achieve the at least partially and / or at least temporarily acting on the respective heat ⁇ transport element .
  • a relative movement of the respective active part with respect to the respective heat transport element can be used to ⁇ that in order to achieve the above-mentioned application.
  • the translation or the rotation of the electric machine can be shared by a respective heat transfer element based on the magnetocaloric Ef ⁇ effect is operated for cooling electric machine, the respective heat transfer element, for example, via a mechanical translation with or builds on a be ⁇ Movable part of the electrical machine is connected.
  • a combination of the temporal variation of the magnetic field with the relative movement can also be used to ensure the at least partial and / or at least temporary loading of the respective heat transfer element.
  • the firstdeab ⁇ can cut and the second cooling section for this purpose suitably ⁇ staltet. It is preferably provided that the waste heat of the first cooling medium can be transferred to the respective heat transfer element when the respective heat transfer element has been cooled to ⁇ at least partially and / or at least temporarily by means of the magnetocaloric effect.
  • the waste heat from the respective heat transfer member to the second cooling medium is transferred, if the particular heat transfer element comprises at least vo was heated ⁇ over continuously by the magnetocaloric effect at least partially and / or.
  • the respective heat transport element is arranged around a rotation axis rotatable ⁇ bar and / or translationally movable in the electric machine, wherein a first element region of jewei ⁇ ligen heat transport element is arranged in a first machine area of the electric machine, which with ⁇ means of the one active part is acted upon at least with the magnetic field, wherein a second element region of the respective heat transfer element is arranged in a second machine area outside of the first machine section.
  • the axis of rotation may be the axis of rotation of a shaft or a rotor of the electric machine.
  • the respective heat transfer element is, for example, rotationally fixed or connected via a transmission with the shaft or the rotor.
  • the respective heat transfer element has a first ele ⁇ ment area and a second element region, which can be formed for example by the two halves of the respective heat transfer element.
  • the first element region is arranged in the first machine portion which at least one active part with the magnetic field can be acted upon by means of the ⁇ , so that the first Elementbe ⁇ is rich acted upon by the magnetic field.
  • the second Ele ⁇ management area is located in the second engine portion WEL rather outside of the first machine section is arranged.
  • the first machine region may be a region of the electrical machine which can be acted upon by a particularly strong magnetic field
  • the second machine region may be a region of the electric machine which is only exposed to or subjected to a comparatively weak or no magnetic field.
  • the first element region or the second element region is that region which is currently arranged in the first machine region or in the second machine region.
  • DIE ser respective to the rotational axis of the rotating transport element so located point during rotation thus temporarily in the first Ele ⁇ management area and temporarily in the second element region, depending on whether the point is currently in the first machine range or in the second Machine area is located.
  • an effective cycle can be obtained in which individual points of the respective heat transfer element to undergo the above-mentioned processes of adia ⁇ batic heating and adiabatic cooling and thus particularly well absorb waste heat of the first cooling medium and the second cooling medium can give.
  • adiabatic processes are already present at comparatively low speeds.
  • the electric machine may be configured such that the above-explained first and second machine spaces are present and that the respective heat Trans ⁇ port element, the above-explained first and second element regions has.
  • the electric machine may be configured such that the above-explained first and second machine spaces are present and that the respective heat Trans ⁇ port element, the above-explained first and second element regions has.
  • the translational and / or rotational movement generated by the electrical ⁇ specific machine can thus be used for the described heating or cooling of each heat transfer element, in particular if the respective Wär ⁇ metransportelement is driven by a rotor of the electric machine.
  • the respective active part is designed such that the magnetic field is aligned substantially along the axis of rotation.
  • the first element region and the second element region can be viewed in cross-section perpendicular to the axis of rotation, for example, two opposite halves of jewei ⁇ ligen heat transport element.
  • the respective active part can be designed such that the first element region, in particular one of the two halves can be beauf ⁇ beat with a particularly strong magnetic field in the direction of the axis of rotation, whereas the second element region, in particular the other half, with a comparatively weak or no magnetic field is acted upon or is acted upon.
  • the respective active part is such out ⁇ staltet that the magnetic field is substantially perpendicular to the rotation axis.
  • the first element region and said second element region can turn in cross section perpendicular to the rotation axis betrach ⁇ tet example, two opposing halves of the respective heat transfer element be.
  • the respective active part can be designed such that the first Elementbe can be ⁇ rich, and in particular one of the two halves, beauf ⁇ beat with a particularly strong magnetic field perpendicular to the axis of rotation, whereas the second element region, in particular the other half, with a comparatively weak or no magnetic field can be acted upon or is acted upon.
  • the direction of the magnetic field may be uniform in x-direction.
  • the first cooling section is designed such that waste heat from the first cooling medium to the second element region is transferable, wherein the second cooling section is configured such that waste heat from the first element region to the second cooling medium is transferable.
  • the first cooling section or the primary circuit is for this purpose designed into ⁇ particular such that the first cooling medium to the respective said second element region is feasible and, after the first cooling medium has transferred its heat to the respective second element region, by the respective second element region of the parts to be cooled the electrical machine is feasible.
  • the second cooling section or the secondary circuit is configured so that the second cooling ⁇ medium to the first element region is feasible and, after the second cooling medium has absorbed the waste heat of the first element region, from the respective first element region, for example, to a heat sink feasible.
  • a turbomachine is provided in the first cooling section and / or in the second cooling section, by means of which the flow of the respective cooling medium can be driven.
  • the respective heat transfer element has at least four subregions, wherein for a given direction of rotation of the respective heat transfer element
  • the first sub-region within the first element region is located where a local temperature of the heat ⁇ transport element can be increased ⁇ netic order of the heat transfer element by means of a local increase of the like, - the second partial region within the first element preparation ⁇ ches in the rotational direction subsequent to the first subarea is arranged
  • waste heat from the respective heat transport element can be transmitted to the second cooling medium via the second subregion
  • the third portion is disposed within the second member preparation ⁇ ches where a local temperature of the heat transport element is erniedrigbar means of a local reduction of the magnetic order of the heat transfer element,
  • waste heat from the first cooling medium can be transferred to the respective heat transfer element via the fourth subregion.
  • the first portion is thus that portion of the respective heat transfer member that is exposed to the increase of the Magnetfel ⁇ , so that the magnetic moments are aligned in that region to a preferential direction, and arranged in order. Since the increase of the magnetic field in the general ⁇ my even at comparatively low speeds takes place within a short time, is generally in front of a Adiaba ⁇ genetic process, so that at the same time the local temperature ⁇ structure in that region, in addition increases.
  • the material of the second section has already passed through the step of adiabatic heating and thus has an additionally increased temperature.
  • the second cooling medium is connected to the second portion in thermal contact so that the waste heat of the second portion is transmitted to the second cooling ⁇ medium, whereby the second portion is cooled.
  • the respective heat transport element is exposed to the lowering of the magnetic field in the third subregion, as a result of which the magnetic moments in that region tend to lose their preferential direction and thus become more disordered. Since the lowering of the magnetic field usually within kur ⁇ space of time takes place, again there is an adiabatic process process, so that simultaneously the local temperature drops further in that region.
  • the material of the fourth sub region has already been subjected to the Adiaba ⁇ tables cooling and therefore has a further lowered temperature.
  • the first cooling medium which is in thermal contact with the fourth partial area, can therefore transfer a particularly large amount of waste heat to the fourth partial area, as a result of which the fourth partial area is heated.
  • the individual points of the respective heat transfer element pass through the steps explained above, so that a cyclic process is formed.
  • the first cooling section is configured in such a way that the first cooling medium can initially be guided to the fourth subregion and subsequently to the third subregion of the respective heat transfer element.
  • the fourth portion of the jeweili ⁇ gen heat transfer element to a temperature higher than the third portion, so that the first cooling medium is first performed for the fourth, warmer portion.
  • the first cooling medium is then guided to the third, cooler partial region, so that altogether a particularly effective heat exchange between the first cooling medium and the respective heat transfer element is made possible.
  • this realizes a kind of countercurrent principle.
  • the second cooling section is configured in such a way that the second cooling medium can initially be guided to the second subregion and then to the first subregion of the respective heat transport element.
  • the second cooling medium is thus guided to the second, cooler partial region of the respective heat transfer element, as explained above. Subsequently, the second cooling medium is guided to the first, warmer portion, whereby a particularly effective heat exchange between the respective heat transfer element and the second cooling medium is made possible.
  • a kind of countercurrent principle is realized.
  • the respective heat transfer element on its Oberflä ⁇ che at least one convex element for heatnvergrêt ⁇ tion on.
  • This serves at least a convex element ofmechanicalnver ⁇ enlargement, whereby the exchange with the first cooling medium and the second cooling medium particularly effectively be ⁇ can be staltet.
  • this can increase the amount of heat transferable to the respective heat transfer element waste heat or heat transferable from the respective heat transfer element.
  • the respective convex element comprises the magnetocaloric material.
  • the respective convex element is designed as a rib, web or propeller blade.
  • the rib can be designed to extend in particular in the circumferential direction umlau ⁇ fend or along the axial direction, wherein also mixed forms a Ausgestal ⁇ processing may be provided in sheet form and in particular screws.
  • the web can be designed as a protruding mandrel or the like.
  • the configuration of the respective convex element as a propeller blade the properties of the heat exchange available surface is firstly increased, so that the increase of ⁇ exchangeable amount of heat, and on the other the respective propeller blade can be used to drive the flow of the respective cooling medium.
  • a plurality of propeller blades may be provided, so that a total of, for example, a radial fan or an axial fan are simulated, in particular if a DC cooling is realized in each case with respect to the two cooling media.
  • good cooling results can also be achieved by providing countercurrent cooling with respect to the two cooling media.
  • At least one deflecting element is provided, by means of which in each case the first cooling medium and / or the second cooling medium can be guided to the respective heat transport element or from respective heat transfer element is feasible away and by means of which in each case the first cooling section is fluidically separated from the second cooling section substantially.
  • a depending ⁇ looms flow element can be used, by means of which slows the flow of the respective cooling medium in the flow direction before or after the respective element region and accelerated by the space available Strö ⁇ flow cross-section of the through a diffuser-like or nozzle-like configuration respective flow element in the flow ⁇ direction increases or decreases.
  • the per ⁇ stays awhile flow element can be guided in particular as a deflection from ⁇ .
  • the at least one deflecting element can be used in particular for the coolant guide from or to the four partial areas explained above.
  • the first cooling medium can first be led to the fourth, warmer portion by a suitable molded Umlenkele ⁇ element is provided at least and in particular a suitable Seastal ⁇ Teter channel is formed. Subsequently, the first cooling ⁇ medium is passed through the at least one deflection to the third, cooler portion and finally, in particular to be cooled parts of the electric machine.
  • the second cooling medium, at least one order ⁇ steering member or a suitably configured channel to the second, cooler portion of the respective heat transport element are guided through the. Thereafter, the second cooling medium is guided by means of the at least one deflection to the first, heat ⁇ ren sub-area and finally fed in particular a heat sink.
  • the electric machine has a rotor and a stator on, wherein at least a part of the rotor and / or the Stän ⁇ DERS is formed as the active part.
  • the rotor is also referred to as a rotor and the stator as a stator.
  • the electrical machine is designed for example to produce ei ⁇ nes torque or for generating electrical energy, wherein the rotor and the stator are designed accordingly ⁇ .
  • the rotor and / or the stator, or at least a part of the rotor and / or the stator act as the above-mentioned active part which can be ⁇ least propose a heat transfer element with the magnetic field acted upon.
  • an offshoot of a main excitation field of electrical ⁇ rule engine can thus be used to generate the necessary magnetic field ⁇ .
  • the stand is designed to provide a main exciter field in which the armature ⁇ chemically arranged.
  • the stator or a part of the stand is the illustrated active ⁇ part.
  • the corresponding electrical Ma ⁇ machine is configured as a synchronous machine.
  • the rotor is designed as a foreign-excited or permanently excited rotor, which is arranged coaxially to the stator.
  • the rotor has a greater axial extent than the stator or the stator core, so that a part of the rotor, the stator in the axial
  • the at least one heat transfer element is preferably arranged in the axial extension of the stator or of the stator lamination stack such that it can interact with the projecting part of the rotor.
  • stator can also have a greater axial extent than the rotor or the rotor core, wherein the at least one heat transfer element is arranged, for example, in the axial extension of the rotor so that it can interact with the projecting part of the stator.
  • the electric machine is designed as an external rotor, in particular as a wind power generator.
  • the rotor arranged radially on the outside has at least one active part, which is configured in each case in ⁇ example, as a permanent magnet or electrical winding for a foreign-excited rotor.
  • the radially internally positioned stator and / or more radially outward disposed housing part has at least one on the Wär ⁇ metransportelement.
  • the electric machine is designed as a generator or electric motor.
  • the electric machine with a capacity of more than 1 MW, in particular more than 10 MW, operable.
  • the electric machine is designed as sinläu ⁇ fer, in particular as a wind power generator.
  • FIG. 7 shows a fifth embodiment of the electric machine according to the invention.
  • FIG. 1 shows a first exemplary embodiment of the electric machine according to the invention.
  • the electric machine has a first cooling section 1 and a second cooling section 2, wherein in the first cooling section 1, a first cooling medium is provided for cooling the electric machine. Between the first cooling section 1 and the second cooling section 2, a Cyprustrans ⁇ port element 4 is arranged, which comprises a magnetocaloric Ma ⁇ material.
  • the electrical machine has a Ak ⁇ tivteil 3, by means of which the heat transfer member 4 at ⁇ least partially and / or at least temporarily with a Magnetic field 5 can be acted upon.
  • the arrows provided with the reference numeral 5 are intended to indicate the magnetic field lines of the magnetic field 5 in FIG.
  • the active part 3 and the heat transfer element 4 are designed such that, utilizing the magnetocaloric effect, waste heat from the first cooling medium can be transferred to a second cooling medium provided in the second cooling section 2.
  • Figure 2 shows a second embodiment of the inventive electric machine, wherein a cross section through the electric machine is shown. Same speedszei ⁇ chen as in Figure 1 denote the same objects.
  • the heat transport element 4 is arranged around a shaft 16, which is rotatable about a rotation axis 6 of the electric machine.
  • a first element region 11 of the heat transport element 4 is located in a first machine region of the electric machine, which can be acted upon by the magnetic field 5 by means of the active part 3.
  • the active part 3 is positioned relative to the heat transfer member 4 so that the half of the heat transport element 4 shown in Fi gur ⁇ 2 below can be acted upon with the magnetic field. 5
  • This can be acted upon with the Mag ⁇ netfeld 5 half of the heat transport element 4 illustrates the first element region 11.
  • a second element region 12 of the heat transfer member 4 is arranged in a second machine area outside of the first machine section, said second element region is not acted upon by the magnetic field 5.
  • the first or second cooling medium is guided along the heat transport element 4 in such a way that a coolant flow is formed, as indicated by the arrow provided with the reference symbols 9 and 10.
  • deflecting elements 8 are provided for guiding the respective cooling medium deflecting elements 8 are provided.
  • a DC cooling is thus shown with respect to one of the cooling media and a countercurrent cooling with respect to the other of the cooling media.
  • the active part 3 can, as shown in Figure 2, be arranged on ⁇ such that a magnetic field 5 can be generated, which is substantially perpendicular to the axis of rotation 6 of the electric machine.
  • the active part 3 can be configured such that the magnetic field 5 is substantially parallel to the axis of rotation 6 or mixed forms are present.
  • FIG. 3 shows an alternative view of the second Auspar ⁇ tion example, wherein a longitudinal section through the electric machine is shown.
  • the arrangement shown in FIG. 2 is indicated in the right half of FIG. For the sake of clarity, some details have been omitted.
  • the electric machine has a rotor 13 designed as a rotor 13, which is rotatably connected to the shaft 16 and which is arranged within a stanchion ⁇ th stator 14 ⁇ th.
  • the first cooling section 1 with the first cooling medium can, for example, serve the stand 14 and / or to cool the rotor 13, the can be removed effectively from the first cooling medium ⁇ taken waste heat by means of the heat transfer element.
  • Figure 4 shows a third embodiment of the Invention ⁇ proper electrical machine.
  • the heat transfer element 4 has four subregions I, II, III and IV, which are represented as follows for a given direction of rotation 15.
  • the first subregion I is arranged within the first element region 11 where a local temperature of the heat transporting element 4 can be increased by means of a local increase in the magnetic order of the heat transporting element 4.
  • the first portion I is thus that portion of the respective heat transfer member 4 wel ⁇ cher at a rotation of the heat transport element 4 an increase in the magnetic field 5 is exposed.
  • the second part ⁇ area II is arranged in the direction of rotation 15 following the first portion I, wherein on the second portion II waste heat from the heat transfer element 4 to the seconddeme ⁇ dium transferable.
  • the third subregion III is arranged within the second element region 12 where a local temperature of the heat transporting element 4 can be lowered by means of a local lowering of the magnetic order of the heat transporting element 4.
  • the third portion 3 is where the heat transfer element 4 is exposed in a rotation of a decrease in the magnetic field 5.
  • the fourth subregion IV is arranged in the direction of rotation 15 following the third subregion III, wherein waste heat from the first cooling medium can be transferred to the heat transfer element 4 via the fourth subregion IV.
  • the first cooling section 1 is configured such that the first cooling medium is conducted first to the fourth sub-area IV and then to the third sub-region III, wherein the second cooling medium in such a manner ge ⁇ leads in the second cooling section 2 is that first the second portion II and then in the first portion I in thermal contact with the heat transfer element 4.
  • Cooling media realized a countercurrent cooling.
  • deflecting elements can be provided be, which are designed in particular as a nozzle or diffuser.
  • the active part 3 can, as shown in FIG. 4, be arranged such that a magnetic field 5 can be generated which is substantially perpendicular to the axis of rotation 6 of the electric machine.
  • the active part 3 can be configured such that the magnetic field 5 is substantially parallel to the axis of rotation 6 or mixed forms are present.
  • Figure 5 shows a fourth embodiment of the Invention ⁇ proper electrical machine. Since some similarities to the present second embodiment, differences ⁇ de will be explained between the fourth embodiment and the second embodiment.
  • the active part 3 is realized by two of the stator windings 17, by means of which the heat transfer element 4 can be acted upon by the magnetic field 5 partially or predominantly.
  • Figure 6 shows an alternative view of the fourth Auspen ⁇ tion example, wherein a longitudinal section through the electric machine is shown. For the sake of clarity, some details have been omitted.
  • the electrical machine has a rotor as being ⁇ stalteten rotor 13 which is rotatably connected with the shaft 16 and which is disposed within a stator announced sometimese- than ten stator fourteenth
  • a stator usually, the Läu ⁇ fer on a laminated core, to which is adjoined in the axial direction of the heat transfer element. 4
  • the rotor 13 with its laminated core and parts of the heat transport ⁇ elements 4 can be acted upon by the stator winding 17 with the magnetic field 5, wherein two of the stator windings 17 act in the axial region of the heat transfer element 4 as the active part 3, as indicated in Figure 5.
  • Figure 7 shows a fifth embodiment of the invented ⁇ proper electrical machine.
  • the electric machine is designed as an external rotor, with radially inside a stator 14 with a towntransportele ⁇ ment 4 and radially outwardly a rotor 13 is arranged coaxially to the stator 14, wherein the rotor 13 is rotatable about an axis of rotation 6 in the direction of rotation 15.
  • the rotor 13 has a plurality of active parts 3, which may be designed, for example, as a permanent magnet, as well as deflecting elements 8, which are connected in a rotationally fixed manner to the rest of the rotor 13.
  • the deflection elements 8 are arranged in pairs such that each ⁇ wells a first cooling section 1 and a seconddeab ⁇ section 2 are formable in each of which a first cooling medium and a second cooling medium is feasible, as indicated by the pointing out of the drawing plane, or in white send ⁇ arrow with the reference numeral 9 or 10 is indicated.
  • a respective first element region 11 of the heat transport element 4 acted upon by a magnetic field 5 by means of each ⁇ bib active portion 3, wherein a respective second element region 12 of the heat transport element 4 adjoined in the direction of rotation 15 to the respective first element region 11 and not, or less pronounced with the magnetic field 5 can be acted upon.
  • the second cooling medium is such feasible that the second cooling medium is tes 4 is always in thermal contact with the jewei ⁇ then additionally heated region of the cherriestransportelemen-, wherein said first cooling medium by means of the
  • mitrotierenden deflecting elements 8 is feasible such that the first cooling medium always in thermal contact with the jewei ⁇ ligen additionally cooled region of the plantesportele- Mentes 4 is. Overall, therefore, a particularly wholesomesvol ⁇ ler transfer the waste heat of the first cooling medium is made possible at the second cooling medium.
  • the invention relates to an electrical Ma ⁇ machine comprising a first cooling section, in which a first cooling medium is provided for cooling the electric machine, and a second cooling section, in which a second cooling medium is provided.
  • the electrical machine at ⁇ least one active part and at least one heat transfer element comprising a magnetocaloric material, wherein the at least one heat transfer element at least partially and / or at least temporarily by means of at least an active part can be acted upon by a magnetic field, wherein the at least one active part and the at least one réelletrans ⁇ port element are configured such that by utilizing the magnetocaloric effect waste heat from the first cooling medium to the second cooling medium is transferable.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne une machine électrique, comprenant une première portionsection de refroidissement (1) dans laquelle se trouve un premier fluide de refroidissement destiné à refroidir la machine électrique, et une deuxième portionsection de refroidissement (2) dans laquelle se trouve un deuxième fluide de refroidissement. Selon l'invention, en vue de fournir une alternative aux systèmes de refroidissement connus pour les machines électriques, la machine électrique possède au moins une partie active (3) et au moins un élément de transport de chaleurcaloporteur (4) comprenant un matériau magnétocalorique. Ledit élément de transport de chaleurcaloporteur (4) peut être exposé au moins partiellement et/ou au moins temporairement à un champ magnétique (5) par l'intermédiaire de ladite partie active (3). Ladite partie active (3) et ledit élément de transport de chaleurcaloporteur (4) sont configurés de telle sorte que la chaleur perdue peut être transférée du premier fluide de refroidissement au deuxième fluide de refroidissement en exploitant l'effet magnétocalorique.
EP15702665.9A 2014-02-19 2015-01-21 Refroidissement d'une machine électrique Withdrawn EP3058290A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15702665.9A EP3058290A2 (fr) 2014-02-19 2015-01-21 Refroidissement d'une machine électrique

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP14155749.6A EP2910873A1 (fr) 2014-02-19 2014-02-19 Refroidissement d'une machine électrique
EP15702665.9A EP3058290A2 (fr) 2014-02-19 2015-01-21 Refroidissement d'une machine électrique
PCT/EP2015/051110 WO2015124360A2 (fr) 2014-02-19 2015-01-21 Refroidissement d'une machine électrique

Publications (1)

Publication Number Publication Date
EP3058290A2 true EP3058290A2 (fr) 2016-08-24

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EP14155749.6A Withdrawn EP2910873A1 (fr) 2014-02-19 2014-02-19 Refroidissement d'une machine électrique
EP15702665.9A Withdrawn EP3058290A2 (fr) 2014-02-19 2015-01-21 Refroidissement d'une machine électrique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14155749.6A Withdrawn EP2910873A1 (fr) 2014-02-19 2014-02-19 Refroidissement d'une machine électrique

Country Status (5)

Country Link
US (1) US20170067670A1 (fr)
EP (2) EP2910873A1 (fr)
CN (1) CN106063092B (fr)
RU (1) RU2668266C2 (fr)
WO (1) WO2015124360A2 (fr)

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EP3165115A1 (fr) 2015-11-04 2017-05-10 Ecco Sko A/S Tige tricotée pour une chaussure avec une semelle orthopédique et chaussure
EP3232539A1 (fr) 2016-04-14 2017-10-18 Siemens Aktiengesellschaft Rotor pour une machine tournante electrique
JP2018199860A (ja) * 2017-05-30 2018-12-20 株式会社フジクラ ガドリニウム線材、それを用いた金属被覆ガドリニウム線材、熱交換器及び磁気冷凍装置
WO2019038719A1 (fr) 2017-08-25 2019-02-28 Astronautics Corporation Of America Appareil de réfrigération magnétique de type tambour à anneaux de lit multiples
US11125477B2 (en) * 2017-08-25 2021-09-21 Astronautics Corporation Of America Drum-type magnetic refrigeration apparatus with improved magnetic-field source
CN110864471B (zh) * 2019-11-27 2021-06-08 横店集团东磁股份有限公司 一种自带传动动力的磁制冷装置及方法和用途
GB2603158B (en) 2021-01-28 2023-01-18 Rolls Royce Plc Electrical Machine and Power Electronics Converter
CN114142675B (zh) * 2021-12-07 2022-12-27 黄瑞疏 一种节能电动机

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Also Published As

Publication number Publication date
WO2015124360A3 (fr) 2015-10-29
US20170067670A1 (en) 2017-03-09
CN106063092B (zh) 2018-10-30
RU2016129171A3 (fr) 2018-03-28
RU2668266C2 (ru) 2018-09-28
RU2016129171A (ru) 2018-03-20
WO2015124360A2 (fr) 2015-08-27
CN106063092A (zh) 2016-10-26
EP2910873A1 (fr) 2015-08-26

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