SE533879C2 - Rotary electric machine with improved rotor storage. - Google Patents
Rotary electric machine with improved rotor storage. Download PDFInfo
- Publication number
- SE533879C2 SE533879C2 SE0950897A SE0950897A SE533879C2 SE 533879 C2 SE533879 C2 SE 533879C2 SE 0950897 A SE0950897 A SE 0950897A SE 0950897 A SE0950897 A SE 0950897A SE 533879 C2 SE533879 C2 SE 533879C2
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- SE
- Sweden
- Prior art keywords
- rotor
- stator
- machine according
- electrical machine
- sections
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- 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
- H02K7/08—Structural association with bearings
- H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
- H02K7/088—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly radially supporting the rotor directly
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
533 879 2 häri genom referens. Sammanfattningsvis så lär MixedPole-principen ut använd- ningen av poler med ett påskjutande kant i form av en permanentmagnetdel och en glest laminerad dragande kant. Detta leder till flera fördelar, såsom besparing av permanentmagnetmaterial, låg inducerad spänning i strömlöst tillstånd, reducerade kortslutningsströmmar och enkel fältförsvagning. 533 879 2 herein by reference. In summary, the MixedPole principle teaches the use of poles with a projecting edge in the form of a permanent magnet part and a sparsely laminated pulling edge. This leads to several advantages, such as saving permanent magnet material, low induced voltage in the de-energized state, reduced short-circuit currents and simple field attenuation.
[0007] Den internationella patentpublikationen WO 2004/068678 Al beskriver en roterande elektrisk maskin, vid vilken rotorn år roterbart lagrad till statorn medelst lageranordningar anordnade i eller intill ett luftgap mellan rotorn och statorn. I utföringsformen med en inre rotor år rotorn en ringformad kropp med hög styvhet.The international patent publication WO 2004/068678 A1 describes a rotating electric machine, in which the rotor is rotatably mounted to the stator by means of bearing devices arranged in or next to an air gap between the rotor and the stator. In the embodiment with an internal rotor, the rotor is an annular body with high rigidity.
Sammanfattning av uppfinningen Summary of the invention
[0008] Ett ändamål med föreliggande uppfinning är att åstadkomma en roterande elektrisk maskin, vid vilken luftgapet mellan statorn och rotorn kan hållas betydligt mindre ån vid kända maskiner. An object of the present invention is to provide a rotating electric machine, in which the air gap between the stator and the rotor can be kept considerably smaller than in known machines.
[0009] Enligt uppfinningen åstadkommas en elektrisk maskin innefattande en stator med en öppning, en väsentligen cirkulär rotor monterad i statorns öppning, varvid rotorn är roterbart lagrad till statorn medelst hjul, varvid den elektriska maskinen kännetecknas av att rotorn innefattar åtminstone fyra rotorsektioner, där varje rotorsektion har åtminstone ett par hjul, varvid intilliggande rotorsektioner är ledbart sammankopplande i rotorns perifeririktning. According to the invention there is provided an electric machine comprising a stator with an opening, a substantially circular rotor mounted in the stator opening, the rotor being rotatably mounted to the stator by means of wheels, the electric machine being characterized in that the rotor comprises at least four rotor sections, each rotor section has at least one pair of wheels, adjacent rotor sections being articulated interconnecting in the circumferential direction of the rotor.
[00] 0] Genom att förse rotorn med ett flertal vridbart hopkopplade rotorsektioner följer rotorn enkelt statorns krökning, varigenom luftgapet mellan statorn och rotorn hålls litet.By providing the rotor with a plurality of rotatably connected rotor sections, the rotor easily follows the curvature of the stator, whereby the air gap between the stator and the rotor is kept small.
[OOl l] l en föredragen utföringsform år varje rotorsektion försedd med ett rotorok, som möjliggör slutna magnetiska flödesbanor mellan statorn och respektive rotorsektion. 533 879 3 In a preferred embodiment, each rotor section is provided with a rotor shaft, which enables closed magnetic flow paths between the stator and the respective rotor section. 533 879 3
[0012] I en föredragen utföringsform innefattar den elektriska maskinens rotor ett flertal ekrar som förbinder var och en av rotorsektionerna och en axel. Det föredras att nämnda flertal ekrar är eftergivligo för att ta upp variationer i statorns diameter och eventuell excentrisk position för turbinaxeln. Detta avlastar också axellagret fràn eventuella obalanserade radiella mognetkrafter som verkar pä rotorn, särskilt i samband med permanentmagneter. In a preferred embodiment, the rotor of the electrical machine comprises a plurality of spokes connecting each of the rotor sections and a shaft. It is preferred that said plurality of spokes are resilient to accommodate variations in the diameter of the stator and any eccentric position of the turbine shaft. This also relieves the shaft bearing from any unbalanced radial magnetic forces acting on the rotor, especially in connection with permanent magnets.
[0013] i en annan föredragen utföringsform innefattar statorn skenor, som företrädesvis är fixerade till statorhuset, varvid hjulen är anpassade för att rulla pä skenorna. Detta tillförsäkrar mjuk förflyttning av rotorsektionerna. In another preferred embodiment, the stator comprises rails, which are preferably fixed to the stator housing, the wheels being adapted to roll on the rails. This ensures smooth movement of the rotor sections.
[0014] Ytterligare föredragna utföringsformer definieras av de beroende patentkraven.Further preferred embodiments are defined by the dependent claims.
Kortfattad beskrivnincLav ritninqarna Brief description of the drawings
[0015] Uppfinningen kommer nu att beskrivas, såsom exempel, med hänvisning till bifogade ritningar, på vilka: The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
[0016] Fig. l är en översiktlig sidovy av en elektrisk maskin enligt uppfinningen, [OOl 7] Fig. 2 är en detaljerade sektionsvy som visar nägra av de rotorsektioner som utgör rotorn som visas i Fig. i, [OOl 8] Fig. 3a-c är en sidovy, en toppvy respektive en frontvy av en rotorsektion innefattad i den elektriska maskinen i Fig. l.Fig. 1 is a general side view of an electric machine according to the invention, [OOl 7] Fig. 2 is a detailed sectional view showing some of the rotor sections constituting the rotor shown in Fig. I, [OOl 8]. 3a-c are a side view, a top view and a front view, respectively, of a rotor section included in the electrical machine in Fig. 1.
Beskrivnina av utförinqsformer [OOl 9] l det följande kommer en detaljerad beskrivning av utföringsformer av en elektrisk maskin enligt uppfinningen att ges. 533 879 The Description of Embodiments [10] 9 In the following, a detailed description of embodiments of an electrical machine according to the invention will be given. 533 879
[0020] I denna beskrivning görs referens till ”elektrisk maskin". Detta uttryck skall tolkas som att det täcker elektriska maskiner som fungerar både som generatorer och som motorer. In this description reference is made to “electric machine.” This term is to be construed as covering electrical machines that function both as generators and as motors.
[0021] Fig. l är en översiktlig sidovy av en elektrisk maskin i med en stator, allmönt betecknad l0, och en väsentligen cirkulär rotor, allmänt betecknad 20.Fig. 1 is a schematic side view of an electric machine with a stator, generally designated 10, and a substantially circular rotor, generally designated 20.
Statorn lO innefattar ett statorhus, lamíneríngar och líndningar, såsom kommer att ytterligare förklaras nedan. Spelet eller luftgapet mellan statorn l0 och rotorn 20 betecknas 12 i figuren. The stator 10 includes a stator housing, laminates and windings, as will be further explained below. The clearance or air gap between the stator 10 and the rotor 20 is designated 12 in the figure.
[0022] Statorn l0 uppvisar en öppning 14, i vilken rotorn 20 ör roterbart anordnad. Till den änden är öppningens 14 vägg, dvs. den radiellt inre delen av statorn l0, försedd med åtminstone två skenor ló, av vilka en visas i Fig. l, som sträcker sig omkretsmässigt 360 grader hela vägen runt öppningens l4 periferi. The stator 10 has an opening 14, in which the rotor 20 is rotatably arranged. To that end is the wall of the opening 14, i.e. the radially inner part of the stator 10, provided with at least two rails 10, one of which is shown in Fig. 1, which extends circumferentially 360 degrees all the way around the periphery of the opening 14.
[0023] Rotorn 20 innefattar åtminstone fyra rotorsektioner 30, i utföringsformen i Fig. l l5 rotorsektioner, varvid intill varandra liggande rotorsektioner ör vridbart hopkopplade i rotorns 20 perifeririktning. Rotorsektionerna 30 innefattar hjul 32, vilka rullar på skenorna ló. Därigenom bildar rotorsektionerna 30 tillsammans ett ändlöst tög, som dras mot skenorna ló av magnetkrafter som typiskt uppgär till 20 ton/ m? av luftgapsyta. Dessa rotorsektioner ersätter därigenom den permanent- magnetrotor som påträffas i konventionella roterande maskiner. The rotor 20 comprises at least four rotor sections 30, in the embodiment in Fig. 15 rotor sections, adjacent rotor sections being rotatably connected in the circumferential direction of the rotor 20. The rotor sections 30 comprise wheels 32, which roll on the rails 10. Thereby, the rotor sections 30 together form an endless rope, which is pulled against the rails 10 by magnetic forces which typically amount to 20 tons / m? of air gap surface. These rotor sections thereby replace the permanent magnet rotor found in conventional rotary machines.
[0024] Rotorn kan valfritt innefatta ett flertal eftergivliga element i form av ekrar 22, som överför vridkraften hos en axel 24 till det ändlösa töget av rotorsektioner 30. Till lölid av de magnetkrafter som drar rotorsektionerna 30 till statorn krävs ingen eller nästan ingen kraft från ekrarna för att hålla hjulen 32 i kontakt med skenorna ló. lstöllet är ekrarna 22 företrädesvis eftergivliga så att det upptar variationer i statorns l0 diameter. Med andra ord, om en rotorsektion 30 tvingas radiellt inåt till följd av minskande diameter hos statorn skall längden för motsvarande eker minska, såsom genom fiöderverkan. Omvänt, om en rotorsektion 533 879 30 tvingas radiellt utöt till följd av ökande diameter hos statorns skall löngden för mostsvarande eker öka, företrädesvis också genom fjöderverkan. The rotor may optionally comprise a plurality of resilient elements in the form of spokes 22, which transmit the torsional force of a shaft 24 to the endless train of rotor sections 30. To lolid of the magnetic forces which pull the rotor sections 30 to the stator, no or almost no force is required from the spokes to keep the wheels 32 in contact with the rails ló. Instead, the spokes 22 are preferably resilient so as to accommodate variations in the diameter of the stator 10. In other words, if a rotor section 30 is forced radially inward due to decreasing diameter of the stator, the length of the corresponding spokes should decrease, such as by fi impact. Conversely, if a rotor section 533 879 is forced radially ejected due to increasing diameter of the stator, the length of must-corresponding spokes should increase, preferably also by spring action.
[0025] De elastiska elementen 22 kan vara i form av gummielement, vilka ör eftergivliga i en radiell riktning och öven i viss utsträckning i en tangentiell riktning. The elastic elements 22 may be in the form of rubber elements, which are resilient in a radial direction and also to some extent in a tangential direction.
[0026] Fig. 2 visar en detaljerad sektionsvy av de fyra nedersta rotorsektionerna 30 i Fig. l. Man ser hör att varje rotorsektíon 30 ör försedd med ett par hjul 32 (av vilka ett i varje par visas i figuren) och att intill varandra liggande rotorsektioner ör vridbart hoppkopplade vid en hjulaxel 36. Fig. 2 shows a detailed sectional view of the four lower rotor sections 30 in Fig. 1. It can be seen that each rotor section 30 is provided with a pair of wheels 32 (one of which in each pair is shown in the figure) and that next to each other horizontal rotor sections are rotatably coupled to a wheel axle 36.
[0027] Fig, 3a<: visar en av de ovannämnda rotorsektionerna 30, vilka samtliga ör identiska. Varje rotorsektíon innefattar ett chassi eller en ram 34, till vilken paret hjul 32 ör roterbart lagrat medelst en hjulaxel 36 som ströcker sig genom lagerboxar 44, se Fig. 3b och 3c. Fig. 3a <: shows one of the above-mentioned rotor sections 30, all of which are identical. Each rotor section comprises a chassis or frame 34, to which the pair of wheels 32 are rotatably mounted by means of a wheel axle 36 extending through bearing boxes 44, see Figs. 3b and 3c.
[0028] Återigen med hönvisning till fig. 3a ör ett rotorok 38 föst till en krökt nedre yta av ramen 34. Krökningen hos den krökta nedre ytan ör anpassad till krökningen hos statorns inneryta. Pö rotoroket 38 ör ett flertal rotorpoler 40 fösta. Dessa rotorpoler kan vara konventionella permanentmagnetpoler men ör företrädesvis av den ovannömnda MixedPole-typen. Again, with reference to Fig. 3a, a rotor hook 38 is attached to a curved lower surface of the frame 34. The curvature of the curved lower surface is adapted to the curvature of the inner surface of the stator. A plurality of rotor poles 40 are attached to the rotor rocket 38. These rotor poles may be conventional permanent magnet poles but are preferably of the above-mentioned MixedPole type.
[0029] Ramen 34 ör försedd med en föstkrok 42, vilken ör anpassad för att göra ingrepp med en ingreppsdel 46 av en intilliggande rotorsektíon 30. I den utförings- form som visas i figurerna så ör denna ingreppsdel en del av den ram 34 som omger den centrala delen av hjulaxeln 36. The frame 34 is provided with a fastening hook 42, which is adapted to engage an engaging portion 46 of an adjacent rotor section 30. In the embodiment shown in the figures, this engaging portion is a part of the surrounding frame 34. the central part of the wheel axle 36.
[0030] Nu med hönvisning till fig. 3c visas dör ett tvörsnitt genom statorn l0 med ett statorhus 19 och ett statorpaket 18. Man ser hör att luftgapet mellan statorpaketet l 8 och rotorpolerna 40 kan höllas till ett minimum tack vare att 533 879 rotorpolerna ör anordnade på en rotorsektion 30, som ör vridbart hopkopplad med de intilliggande rotorsektionerna. Referring now to Fig. 3c, a cross-section through the stator 10 with a stator housing 19 and a stator package 18 dies. It can be seen that the air gap between the stator package 18 and the rotor poles 40 can be kept to a minimum due to the fact that the 533 879 rotor poles arranged on a rotor section 30, which is rotatably coupled to the adjacent rotor sections.
[0031] En föredragen utföringsform av en elektrisk maskin enligt uppfinningen har beskrivits. Fackmannen inom teknikområdet inser dock att denna kan varieras inom ramen för de bifogade patentkraven utan att man awiker frön uppfinningsidén.A preferred embodiment of an electric machine according to the invention has been described. However, those skilled in the art will appreciate that this may be varied within the scope of the appended claims without departing from the spirit of the invention.
Sålunda kan de elastiska element som förbinder rotorsektionerna och axeln anta varie lämplig form, sö lönge som de tar upp variationer i rotordiametern och överför rörelsen hos rotorsektionerna till vridning av axeln.Thus, the elastic members connecting the rotor sections and the shaft can take any suitable shape, as long as they absorb variations in the rotor diameter and transmit the movement of the rotor sections to rotation of the shaft.
Claims (9)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0950897A SE533879C2 (en) | 2009-11-25 | 2009-11-25 | Rotary electric machine with improved rotor storage. |
| PCT/SE2010/051244 WO2011065893A1 (en) | 2009-11-25 | 2010-11-12 | Rotating electrical machine with improved rotor bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0950897A SE533879C2 (en) | 2009-11-25 | 2009-11-25 | Rotary electric machine with improved rotor storage. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE0950897A1 SE0950897A1 (en) | 2011-02-22 |
| SE533879C2 true SE533879C2 (en) | 2011-02-22 |
Family
ID=43535816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE0950897A SE533879C2 (en) | 2009-11-25 | 2009-11-25 | Rotary electric machine with improved rotor storage. |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE533879C2 (en) |
| WO (1) | WO2011065893A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012138725A1 (en) * | 2011-04-04 | 2012-10-11 | Columbia Power Technologies, Inc. | A mechanical assembly for maintaining an air gap between a stator and rotor in an electro-mechanical energy converter |
| US9590468B2 (en) | 2012-10-08 | 2017-03-07 | Exro Technologies Inc. | Electrical machines such as generators and motors |
| CN107959360A (en) * | 2016-10-18 | 2018-04-24 | 李岳翰 | Salient pole structure |
| EP4372971A1 (en) | 2021-07-14 | 2024-05-22 | Optimized Generators, SL | Direct drive wind turbine |
| NL1044109B1 (en) * | 2021-08-02 | 2023-02-17 | Patrick Ronald Tack Ing | Rotary assembly |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9311634D0 (en) * | 1993-06-03 | 1993-07-21 | Spooner Edward | Electromagnetic machine |
| SE526286C2 (en) * | 2003-01-27 | 2005-08-16 | Aegir Konsult Ab | Rotary electric machine with bearing means arranged in or adjacent to the air gap, and power plant with such machine |
-
2009
- 2009-11-25 SE SE0950897A patent/SE533879C2/en unknown
-
2010
- 2010-11-12 WO PCT/SE2010/051244 patent/WO2011065893A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| SE0950897A1 (en) | 2011-02-22 |
| WO2011065893A1 (en) | 2011-06-03 |
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