SI23980A - The rotor with permanent magnets of synchronous electro motor - Google Patents
The rotor with permanent magnets of synchronous electro motor Download PDFInfo
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- SI23980A SI23980A SI201200006A SI201200006A SI23980A SI 23980 A SI23980 A SI 23980A SI 201200006 A SI201200006 A SI 201200006A SI 201200006 A SI201200006 A SI 201200006A SI 23980 A SI23980 A SI 23980A
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Rotor s trajnimi magneti ima gred, jedro, po obodu jedra razporejeno množico trajnih magnetov, obdanih z ojačitvenim elementom, pri čemer rotor vsebuje jedro tvorjeno kot lamelasto jedro s pozicionirnimi lamelami in sidrnimi lamelami, ki ima po obodu razporejene vzdolžne utore tipa lastovičji rep. Pozicionirne lamele in sidrne lamele so združene v paket lamel tako, da se na obodu lamelastega jedra tvorijo vzdolžni utori tipa lastovičji rep, ki so prekinjeni v določenem razmiku s stojinami pozicionirnih lamel, in so na obodu lamelastega jedra med utori nameščeni trajni magneti, fiksno pritrjeni z ojačitvenim elementom v obliki ojačitvene kletke iz umetne mase.A rotor with permanent magnets has a shaft, a core, a plurality of permanent magnets arranged around the circumference of the core, surrounded by a reinforcing element, wherein the rotor contains a core formed as a lamellar core with positioning lamellae and anchor lamellae, which has longitudinal dovetail grooves arranged around the circumference. Positioning lamellas and anchor lamellas are combined into a package of lamellas in such a way that dovetail-type longitudinal grooves are formed on the perimeter of the lamella core, which are interrupted at a certain distance by the webs of the positioning lamellas, and permanent magnets, fixedly attached, are placed on the perimeter of the lamella core between the grooves with a reinforcing element in the form of a reinforcing cage made of plastic.
Description
Predmet izuma je rotor s trajnimi magneti kot del sinhronega elektromotorja, kot je na primer elektromotor stroja za belo tehniko npr. pralnega ali pomivalnega stroja, katerega rotor ima krožno na odmiku od svoje glavne osi razporejene trajne magnete, obdane z ojačitvenimi elementi, in je razporejen znotraj statorja istega elektromotorja.The subject of the invention is a permanent magnet rotor as part of a synchronous electric motor, such as the electric motor of a white goods machine, e.g. a washing machine or dishwasher whose rotor has a permanent magnet arranged circularly at a distance from its principal axis, surrounded by reinforcing elements, and arranged within a stator of the same electric motor.
Tehnični problemA technical problem
Tehnični problem, ki ga rešuje izum, je namestitev in pritrditev trajnih magnetov na rotorju na način, ki bo zagotavljala neprekinjeno fiksno pritrditev magnetov na rotor neodvisno od hitrosti vrtenja rotorja, še zlasti pri visokem številu vrtljajev, pri čemer pa se dimenzije in masa rotorja ne bodo povečale glede na do sedaj znane rotorje pri določenem številu vrtljajev in bo rešitev tudi enostavna in ekonomična za proizvodnjo.A technical problem solved by the invention is the installation and attachment of permanent magnets on the rotor in a manner that will provide continuous fixed attachment of the magnets to the rotor, regardless of the speed of rotation of the rotor, especially at high speeds, but without the dimensions and weight of the rotor will increase relative to known rotors at a certain speed and will also be easy and economical to manufacture.
Stanje tehnikeThe state of the art
Pri elektromotorjih, ki za ustvarjanje navora uporabljajo na rotorju razporejene trajne magnete, obstaja problem namestitve zlasti pa pritrditve magnetov na rotorjevo jedro. Ta problem je še zlasti očiten pri rotorjih, ki obratujejo z višjimi ali zelo visokimi hitrostmi, kot so rotorji elektromotorjev v sodobnih strojih bele tehnike. Najpogostejša rešitev je lepljenje magnetov na jedro rotorja in dodatno utrjevanje z različnimi objemnimi elementi kot so objemni obročki ali objemni plašč na obodu rotorja Da se zagotovi konstanten krožni presek rotorja po celotni dolžini, je rotor skupaj z objemnimi elementi običajno obdan še z umetno maso ali drugim podobnim materialom, da se zagotovi konstantna in gladka površina plašča in konstanten presek po celotni dolžini rotorja. Zaradi dodatnih elementov na rotorju se reža med statorjem in rotorjem oz. magneti veča s čimer se zmanjšuje magnetni pretok s tem pa tudi učinkovitost motorja. Objemni elementi morajo biti izdelani iz nemagnetnih materialov, kot je na primer nerjavno jeklo ali ojačitvena vlakna, da ne vplivajo na magnetni pretok med rotorjem in statorjem, hkrati pa morajo imeti zadostno trdnost, da zagotavljajo fiksno pritrditev. Da je reža med magneti rotorja in statorjem čimmanjša, se uporabljajo rotorju soosni ločni magneti, ki pa izkazujejo velik samodržni vrtilni moment, ki ima za posledico neenakomerno delovanje motorja pri povišani stopnji hrupa.For electric motors that use permanent magnets arranged on the rotor to create torque, there is a problem of mounting, in particular, the attachment of magnets to the rotor core. This problem is particularly apparent in rotors operating at higher or very high speeds, such as rotors of electric motors in modern home appliances. The most common solution is to bond magnets to the rotor core and further consolidate it with various clamping elements such as clamping rings or clamping sleeve at the rotor circumference. To ensure a constant circular cross-section of the rotor along its entire length, the rotor, together with the clamping elements, is usually surrounded by plastic or other. similar materials to ensure a constant and smooth surface of the jacket and a constant cross-section over the entire length of the rotor. Due to the additional elements on the rotor, the gap between the stator and the rotor is cut. magnets increase, thus reducing the magnetic flux and thus the motor efficiency. The clamping elements must be made of non-magnetic materials, such as stainless steel or reinforcing fibers, so as not to interfere with the magnetic flux between the rotor and the stator, while having sufficient strength to provide a fixed attachment. To minimize the gap between the rotor magnets and the stator, coaxial separate magnets are used for the rotor, which, however, exhibit high self-holding torque resulting in uneven motor operation at elevated noise levels.
Pri rotorjih z visokim številom vrtljajev je centrifugalna sila, ki je posledica vrtenja rotorja, tako velika, da pritrditev magneta z lepljenjem na površino jedra rotorja nikakor ne zadošča. Zato se magneti vlagajo v za to prirejene izreze v lamelah oz. jedru rotorja. Kovinske lamele, ki so v paketu nameščene na osi rotorja, imajo obliki prečnega prereza magneta prirejene izreze, v katere so vstavljeni magneti. Del vsakokratne lamele, ki se nahaja nad magnetom, deluje nasproti centrifugalni sili pri vrtenju rotorja in tako preprečuje odmik magneta v radialni smeri. Tak način fiksiranja magneta je sicer učinkovit vendar lamele, ki so izdelane iz kovinskega materiala, povzročijo stik magnetnih polov sosednjih magnetov in s tem zmanjšajo gostoto magnetnega polja. Posledično, morajo biti za doseganje enakega učinka, magneti večji in močnejši, kar pa ni zaželeno tako iz prostorskega kot tudi ekonomskega vidika.For high-speed rotors, the centrifugal force due to rotation of the rotor is so large that the attachment of the magnet by gluing it to the surface of the rotor core is by no means sufficient. Therefore, the magnets are inserted into the cutouts made in the slats. the rotor core. The metal blades, which are bundled on the rotor axis, have cutouts in the form of a cross section of the magnet, with cutouts into which the magnets are inserted. The part of the louver located above the magnet acts against the centrifugal force when rotating the rotor, thus preventing the magnet from moving in the radial direction. This method of fixing a magnet is effective, but the blades made of metal material cause the magnetic poles of adjacent magnets to contact and thus reduce the density of the magnetic field. Consequently, to achieve the same effect, the magnets must be larger and stronger, which is not desirable from a spatial or economic point of view.
V US 2008/0307635 Al (Marioni) je opisan rotor s trajnimi magneti, ki vsebuje valjasto jedro, obdano z množico trajnih magnetov, pozicioniranih z lončastim telesom in fiksiranih z umetno maso. Lončasto telo ima na plašču množico stopničasto oblikovanih vzdolžnih utorov, ki v notranjosti telesa tvorijo segmente za sprejem magnetov. Magneti imajo stopničasto oblikovane robove, ki se ujemajo s stopničastimi utori lončastega telesa, katerih naloga je radialno pozicioniranje magnetov na rotorju. Za pravilno namestitev magnetov na rotorski del ima valjasto jedro po obodu oblikovane poglobitve za sprejem magnetov, medsebojno ločene z vzdolžnimi grbinami. Po vstavitvi valjastega jedra in magnetov v lončasto telo, so vzdolžne grbine soležne utorom lončastega dela, prazni prostori med posameznimi elementi pa so zapoljneni z umetno maso, katere naloga je medsebojno fiksiranje delov rotorja. Umetna masa, ki obdaja magnete in delno tudi lončasto telo, fiksira posamezne magnete, ne zagotavja pa zadostne protisile centrifugalni sili, ki med delovanjem deluje na magnete. Zato so magneti dodatno obdani z lončastim delom, ki zagotavlja konstrukcijsko stabilnost zlasti med obratovanjem. Slabost opisane rešitve je tudi v številnih oblikovnih elementih, ki jih vsebujejo posamezni elementi za namene pozicioniranja, ki omogočajo oblikosklepne zveze, kar pomeni zahtevnejšo predvsem pa neekonomično izdelavo.US 2008/0307635 Al (Marioni) describes a permanent magnet rotor comprising a cylindrical core surrounded by a plurality of permanent magnets positioned with a crucible body and fixed with plastic. The pot body has a plurality of stepwise longitudinal grooves on the mantle that form segments for receiving magnets inside the body. The magnets have stepped shaped edges that match the stepped grooves of the potted body, whose task is to radially position the magnets on the rotor. For the correct placement of the magnets on the rotor part, the cylindrical core around the circumference has shaped recesses for receiving the magnets, separated from each other by longitudinal humps. After inserting the cylindrical core and magnets into the earthen body, the longitudinal humps are positioned by the grooves of the earthen part, and the empty spaces between the individual elements are filled with plastic material, which is tasked with fixing the parts of the rotor with one another. The plastic that surrounds the magnets, and partly the earthen body, fixes the individual magnets, but does not provide sufficient counter-force to the centrifugal force acting on the magnets during operation. Therefore, the magnets are additionally surrounded by a potted part, which guarantees structural stability especially during operation. The disadvantage of the described solution is also in the many design elements contained in the individual elements for positioning purposes, which allow for form-locking connections, which means more difficult, especially uneconomical production.
Rešitev tehničnega problemaThe solution to a technical problem
Opisani tehnični problem je rešen z rotorjem s trajnimi magneti kot del sinhronega elektromotorja, kot je na primer elektromotor stroja za belo tehniko, npr. pralnega ali pomivalnega stroja, ki ima gred, katere os sovpada z glavno osjo motorja, jedro v bistu valjaste oblike, po obodu jedra razporejeno množico trajnih magnetov, obdanih z vsaj enim ojačitvenim elementom, pri čemer rotor vsebuje jedro, ki ima po obodu razporeje vzdolžne utore tipa lastovičji rep, ki so medsebojno enakomerno razmaknjeni, da tvorijo ležišča za magnete, pri čemer je jedro tvorjeno iz pozicionimih lamel in sidrnih lamel lamel, trajne magnete lečaste oblike s polmerom stranice, ki gleda proti zunanjosti, manjšim od polmera rotorja in ojačitveno kletko iz umetne mase kot ojačitveni element.The described technical problem is solved by a permanent magnet rotor as part of a synchronous electric motor, such as the electric motor of a white goods machine, e.g. washing machine or dishwasher having a shaft whose axis coincides with the main axis of the engine, a substantially cylindrical core, a plurality of permanent magnets arranged around the periphery of the core, surrounded by at least one reinforcing element, the rotor having a core having a circumferential arrangement along the circumference swallow-type grooves spaced evenly to form magnet beds, the core being formed of positional lamellae and anchor lamellae, permanent magnets of a lens shape with a side radius facing less than the radius of the rotor and a reinforcing cage plastic as a reinforcing element.
Podrobneje bo izum pojasnjen v nadaljevanju z opisom izvedbenega primera in priloženih skic, ki kažejo:The invention will be explained in more detail below with a description of an embodiment and the accompanying drawings showing:
slika 1 rotor s trajnimi magneti po izumu v delnem prerezu, slika 2 detajl rotorja po izumu s slike 1, slika 3 rotor s trajnimi magneti po izumu s pozicionimo ojačitvenimi lamelami v delnem prerezu, slika 4 detajl rotorja po izumu s slike 1, slika 5 rotor s trajnimi magneti s prečnimi utori.figure 1 rotor with permanent magnets according to the invention in partial section, figure 2 detail of the rotor according to the invention from figure 1, figure 3 rotor with permanent magnets according to the invention with positioning reinforcing lamellae in partial cross section, figure 4 detail of the rotor according to the invention from figure 1, figure 5 permanent magnet rotor with transverse grooves.
Sinhroni elektromotor vsebuje stator (neprikazano) in znotraj njega soosno razporejen rotor 100, ki ima gred 1, katere os sovpada z glavno osjo motorja, jedro 2, ki je v bistvu valjaste oblike in ima središčno luknjo za sprejem gredi 1 in po obodu jedra 2 razporejeno množico trajnih magnetov 7.The synchronous electric motor comprises a stator (not shown) and a rotor 100 coaxially arranged therein, having a shaft 1 whose axis coincides with the main axis of the motor, a core 2 which is substantially cylindrical and has a central hole for receiving the shaft 1 and around the circumference of the core 2 distributed array of permanent magnets 7.
Jedro 2 ima po obodu razporeje vzdolžne utore 21 tipa lastovičji rep, najmanj dva vzdolžna utora, ki so medsebojno enakomerno razmaknjeni. Razmik med sosednjima vzdolžnima utoroma 21 je določen z dimenzijo trajnega magneta 7, ploskev med utoroma 21 tvori ležišče 22 magneta 7 in je prilagojeno spodnji ploskvi magneta 7. Jedro 2 je tvorjeno iz kovinskih lamel 3 diskaste oblike, ki so na znan način medsebojno povezane v paket lamel tako, da tvorijo t. im. lamelasto jedro 2. Lamelasto jedro 2 sestoji iz dveh vrst lamel, iz pozicionimih lamel 4 in sidrnih lamel 5, pri čemer je število pozicionimih lamel 4 manjše od števila sidrnih lamel 5.The core 2 has circumferential grooves 21 of the swallowtail type around the circumference, at least two longitudinal grooves that are evenly spaced from one another. The distance between adjacent longitudinal grooves 21 is determined by the dimension of the permanent magnet 7, the surface between the grooves 21 forms a bearing 22 of the magnet 7 and is adapted to the lower surface of the magnet 7. The core 2 is formed of metal blades 3 of disc shape, which are in a known manner interconnected in bundle bundles so that they form t. im. lamella core 2. Lamella core 2 consists of two types of lamellae, positional blades 4 and anchor blades 5, wherein the number of positional blades 4 is less than the number of anchor blades 5.
Pozicionima lamela 4 ima po obodu razporejene stojine 41, ki se razširajajo v smeri radia navzven. Število stojin 41 na obodu posamezne pozicionime lamele 4 je enako številu magnetov 7, širina stojine 41 pa je odvisna od dimenzije magnetov 7 oz. od zahtevanega njihovega medsebojnega razmika. Število, oblika in razporeditev stojin 41 je enaka na vseh pozicionimih lamelah 4.The slats 4 are positioned around the circumference by the webs 41 extending in the direction of the radio outwards. The number of webs 41 on the perimeter of each positional louver 4 is equal to the number of magnets 7, and the width of the web 41 depends on the dimension of the magnets 7 and. from the required spacing of them. The number, shape and arrangement of the stands 41 are the same on all positional blades 4.
Sidrna lamela 5 ima po obodu razporejene zareze 51, katerih bočne stranice 52 so tvorjene v obliki lastovičjega repa z zaobljenimi robovi. Razporeditev zarez 51 na sidrni lameli 5 sovpada z razporeditvijo stojin 41 na pozicionimi lameli 4. Pozicionime lamele 4 in sidrne lamele 5 so medsebojno združene v paket lamel in tvorijo lamelasto jedro 2 tako, da zareze 51 sidrnih lamel 5 tvorijo na obodu lamelastega jedra 2 vzdolžne utore 21 tipa lastovičji rep, pri čemer je vsakokratni utor 21 v določenem razmiku prekinjen s stojinami 41 pozicionimih lamel 4.The anchor blade 5 has notches 51 arranged around the circumference, the lateral sides 52 of which are formed in the shape of a swallowtail with rounded edges. The arrangement of the notches 51 on the anchor blade 5 coincides with the arrangement of the webs 41 on the positional lamellae 4. The positional lamellae 4 and the anchor lamellae 5 are interconnected in a package of lamellae and form a lamella core 2 such that the notches 51 anchor lamellae 5 form at the circumference of the lamella nucleus 2 grooves of the swallow tail type 21, each groove 21 being interrupted at a certain distance by the webs 41 of the positioning blades 4.
Po obodu lamelastega jedra 2 je v vsakokratnem odseku med dvema sosednjima utoroma 21 oz. med vsakokratnima vzdolžnima nizoma sosednjih stojin 41 nameščen trajni magnet 7, ki ima spodnjo stranico skladno ležišču 22 na lamelastem jedru 2, v izvedbenem primeru je zaradi ekonomičnosti spodnja stranica ravna ploskev, in ima nasprotno, zgornjo stranico lečasto oblikovano s polmerom manjšim od polmera rotorja, pri čemer sta drugi dve nasprotni si stranici medsebojno vzporedni. Lečasta oblika magneta omogoča blažje prehode med posameznimi magneti, kar zelo pripomore k zmanjšanju samodržnega vrtilnega momenta, to pa pomeni tudi manjši hrup.Following the circumference of the lamellar core 2, there are 21 and 2 in each section between the two adjacent grooves respectively. a permanent magnet 7 is mounted between the respective longitudinal rows of adjacent stands 41, having a lower side in accordance with the bearing 22 on the lamella core 2, in the embodiment, the lower side is a flat face and, on the contrary, the upper side is lens-shaped with a radius smaller than the radius of the rotor, with the other two opposite sides being parallel. The lens shape of the magnet allows for smoother transitions between the individual magnets, which greatly helps to reduce the self-sustaining torque, which also means less noise.
Tako pozicionirani magneti so obdani z umetno maso zahtevanih lastnosti. Umetna masa, ki zapolni vmesne prostore med posameznimi magneti, prekrije magnete in tvori ojačitveno kletko 8, ki sestoji iz valjastega trdnostnega plašča 81 in prioblikovanih ojačitvenih obročev 82 na vsakokratnem koncu magnetov. Debelina trdnostnega plašča 81 se po obodu spreminja zaradi lečastega preseka magnetov. V območju nad lastovičjim utorom med magnetoma se umetna masa dejansko zasidra v vsakokratnem vzdolžnem utoru 21 in tvori z njim oblikosklepno zvezo, s čimer se sila umetne mase, ki nasprotuje centifugalni sili magnetov, med delovanjem rotorja poveča do take mere, da ni potrebna dodatna utrditev v obliki zunanje ojačitve. Umetna masa, ki zapolni področje nad utorom 22, se širi v smeri radiusa in tvori utrditveni klin, ki sega preko vsakokratnega magneta 7 in mu s tem preprečuje, da bi zaradi centrifugalne sile zdrsel v smeri radiusa skozi umetno maso. V območju nad vrhom magneta je debelina plašča iz umetne mase minimalna, s čimer se zagotavlja minimalna zračna reža med magneti in statorjem. Debelina trdnostnega plašča 81 je sorazmerna vrtilni hitrosti in s tem velikosti centrifugalne sile med obratovanjem in obratno sorazmerna zahtevani razdalji med rotorjem in statorjem. Kot umetne mase se lahko uporabjajo različne vrste termoplastov ali duroplastov, ki imajo zadostno trdnost in temperaturno obstojnost, da so sposobne prenašati visoke obremenitev med obratovanjem. Taka vrsta rotorjev je namenjena za srednje do visoke hitrosti vrtenja.The magnets positioned in this way are surrounded by plastic of the required properties. The plastic that fills the spaces between the individual magnets covers the magnets and forms a reinforcement cage 8 consisting of a cylindrical strength sheath 81 and shaped reinforcement rings 82 at each end of the magnets. The thickness of the sheath 81 varies around the circumference due to the lens cross section of the magnets. In the area above the swallow groove between the magnets, the plastic is actually anchored in each longitudinal groove 21 and forms a joint with it, thereby increasing the plastic force, which opposes the centrifugal force of the magnets, during the operation of the rotor, so that no additional hardening is required. in the form of external reinforcement. The plastic that fills the area above the groove 22 extends in the radius direction, forming a hardening wedge that extends through the respective magnet 7, thereby preventing it from sliding in the radius direction through the plastic due to centrifugal force. In the area above the top of the magnet, the thickness of the plastic sheath is minimal, thus ensuring a minimum air gap between the magnets and the stator. The thickness of the sheath 81 is proportional to the rotational speed and thus the magnitude of the centrifugal force during operation and inversely proportional to the required distance between the rotor and the stator. Different types of thermoplastics or duroplasts can be used as plastics, having sufficient strength and temperature resistance to withstand high loads during operation. This type of rotors is designed for medium to high speed rotation.
V primerih visokih hitrosti vrtenja, ko nastopajo velike centrifugalne sile na magnete, oblikosklepna zveza med umetno maso in utorom 21 lamelastega jedra 2 in utrditveni klin umetne mase ne zadostujeta več. V takih primerih je potrebno magnete dodatno fiksirati. V ta namen ima vsakokratna stojina 41 pozicionime lamele 4 na svojem prostem koncu prioblikovana roglja 42, ki sta nasprotno usmerjena in se razširjata v obodni smeri tako, da vsak na svoji strani segata preko magneta proti sredini. S tem je magnet dodatno fiksiran v določeni legi in preprečen mu je premik v radialni smeri. Ker roglja 42 ne segata preko sredine magneta, prednostno ne preko tretjine širine magneta, je preprečena možnost kratke sklenitve magnetnega pola sosednjih magnetov. Oblika rogljev 42 je taka, da skupna višina stojine 41 in rogljev 42 ne presega višine h lečastega magneta 7, kar omogoča izvedbo minimalne debeline trdnostnega plašča 81, pri čemer prečni prerez rotorja ostaja konstanten in okrogel. Ker sta roglja 42 nameščena na vsakokratni stojini 41 pozicionime lamele 4 in ne na vsaki lameli, je vpliv na jakost magnetnega polja zanemrljiv, medtem ko je prispevek k fiksiranju magnetov 7 na jedro 2 rotorja, zelo velik. Tako utrjeni magneti na rotorju ne potrebujejo dodatne utrditve v obliki dodatnih zunanjih ojačitvenih elementov. Zaradi boljše medsebojne povezljivosti in večje trdnosti umetne mase so v stojinah 41 izvedene ojačitvene luknje 43, ki se zapolnijo z umetno maso in s tem še dodatno ojačijo sestav.In the case of high rotational speeds when large centrifugal forces are applied to the magnets, the form-locking connection between the plastic and the groove 21 of the lamella core 2 and the plastic fixing pin is no longer sufficient. In such cases, the magnets must be further fixed. For this purpose, the respective web 41 of the positional blades 4 has at its free end shaped blades 42 which are opposite in orientation and extend in a circumferential direction so that each on its side extends through a magnet towards the center. This further locks the magnet in a certain position and prevents it from moving radially. Since the tines 42 do not extend beyond the center of the magnet, preferably not over a third of the width of the magnet, the possibility of short-circuiting the magnetic pole of adjacent magnets is prevented. The shape of the tines 42 is such that the total height of the stand 41 and the tines 42 does not exceed the height h of the lens magnet 7, which allows the minimum thickness of the sheath 81 to be realized, leaving the cross section of the rotor constant and round. As the blades 42 are mounted on the respective stand 41 of the positioning blade 4 rather than on each blade, the influence on the magnetic field strength is negligible, while the contribution to fixing the magnets 7 on the core 2 of the rotor is very large. Such magnetized magnets on the impeller do not require additional hardening in the form of additional external reinforcement elements. Due to better interconnectivity and greater strength of the plastic, reinforcement holes 43 are made in the webs 41, which are filled with plastic and thus further reinforce the assembly.
V primeru potrebe po dodatnem fiksiranju magnetov 7 se uporabi znan način utrjevanja z ojačitvenimi vlakni 72, pri čemer se z ojačitvenimi vlakni neposredno ovije magnete 7 po celotni njihovi dolžini in se jih nato skupaj z magneti obda z omenjeno umetno maso. Ojačitvena vlakna 72 lahko magnete 7 ovijajo tudi mestoma na v naprej določenih mestih, ki so tvorjena kot prečni utori 71 na zunanji, lečasti ploskvi vsakokratnega magneta 7 in so nato skupaj z magneti 7 obdana z umetno maso. Ojačitvena vlakna so lahko različnih vrst, npr. kevlarsko, karbonsko, stekleno ali drugo vlakno ustreznih lastnosti. Prednost takega učvrščevanja v primerjavi s klasičnim utrjevanjem na zunanjem plašču rotorja je v konstantnosti prečnega prereza rotorja tako po njegovi velikosti kot tudi obliki.In the case of the need for additional fixation of magnets 7, a known method of hardening with reinforcement fibers 72 is used, whereby the reinforcing fibers directly wrap magnets 7 along their entire length and are then enclosed with said plastic together with the magnets. The reinforcement fibers 72 may also be wrapped in places at predetermined locations, which are formed as transverse grooves 71 on the outer, lens surface of the respective magnet 7 and are then surrounded by plastic together with the magnets 7. Reinforcing fibers can be of different types, e.g. Kevlar, carbon, glass or other fibers of the corresponding characteristics. The advantage of such a fixture compared to the classical fixing on the outer casing of the rotor lies in the constant cross-section of the rotor, both in size and shape.
Umetna masa v celoti obdaja magnete, ki so razporejeni po obodu rotorja tako, da tvori plašč konstantnega premera tudi na njihovi sprednji oz. zadnji strani tako, da se tvori kletka 9 iz umetne mase, ki trdno drži trajne magnete 7 v njihovih legah ves čas delovanja rotorja.The plastic is completely encircled by magnets arranged around the periphery of the impeller so as to form a constant-diameter sheath also on their front or front. the rear to form a plastic cage 9 that holds the permanent magnets 7 firmly in their positions throughout the rotor's operation.
Razumljivo je, da lahko strokovnjak s tega področja na osnovi poznavanja piša izuma izvede tudi drugačne posamezne izvedbne spremembe, ne da bi obšel bistvo izuma, kot je opredeljeno v sledečih patentnih zahtevkih.It is to be understood that one skilled in the art may, on the basis of knowledge of the invention, also make other individual variations without circumventing the essence of the invention as defined in the following claims.
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI201200006A SI23980A (en) | 2012-01-10 | 2012-01-10 | The rotor with permanent magnets of synchronous electro motor |
| PCT/IB2013/000544 WO2013104998A2 (en) | 2012-01-10 | 2013-03-06 | Permanent-magnet rotor for a synchronous electric motor |
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| SI201200006A SI23980A (en) | 2012-01-10 | 2012-01-10 | The rotor with permanent magnets of synchronous electro motor |
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| EP3076520B1 (en) * | 2015-03-31 | 2017-11-01 | Siemens Aktiengesellschaft | Rotor for an electric machine and production method |
| DE102015206100A1 (en) * | 2015-04-02 | 2016-10-06 | Bühler Motor GmbH | Permanent magnet rotor |
| KR102452163B1 (en) * | 2017-08-03 | 2022-10-11 | 엘지이노텍 주식회사 | Motor |
| DE102020209212A1 (en) * | 2020-07-22 | 2022-01-27 | Vitesco Technologies GmbH | Arrangement of individual magnet holders on a rotor or stator, electric motor, rotor, stator and joining process |
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| GB2217924B (en) * | 1988-04-25 | 1992-10-07 | Matsushita Electric Works Ltd | Permanent magnet rotor |
| JP2006109676A (en) * | 2004-10-08 | 2006-04-20 | Jtekt Corp | Rotor and manufacturing method therefor |
| JP2006136132A (en) * | 2004-11-05 | 2006-05-25 | Toyota Motor Corp | Rotor and motor |
| US20060127253A1 (en) * | 2004-12-10 | 2006-06-15 | Ekberg Andrew M | Inner drive for magnetic drive pump |
| ATE467938T1 (en) | 2005-11-18 | 2010-05-15 | Askoll Holding Srl | METHOD FOR PRODUCING A PERMANENT MAGNETIC ROTOR FOR A SYNCHRONOUS MOTOR, IN PARTICULAR FOR A WASHING MACHINE PUMP FOR DOMESTIC USE AND INDUSTRIAL APPLICATIONS AND THE LIKE, AND CORRESPONDING ROTOR |
| JP5501572B2 (en) * | 2008-04-25 | 2014-05-21 | 株式会社ジェイテクト | Motor rotor and electric power steering device |
| JP5454753B2 (en) * | 2008-04-21 | 2014-03-26 | 株式会社ジェイテクト | Motor rotor and electric power steering device |
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| WO2013104998A3 (en) | 2014-02-20 |
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