CS248251B1 - Electric machine rotor driven by permanent magnets with internal poles - Google Patents

Abstract

The solution concerns a rotor for an electric machine excited by permanent magnets with internal poles of the synchronous type, used mainly in three-phase drives with adjustable speeds. The purpose of the solution is to construct a simple, mechanically stable rotor, allowing the use of a simple shaft made of magnetic material, for the production of which proven technologies, common in the production of asynchronous machines, can be used. This task is solved by arranging the magnetic blocks in a magnetic order on both sides of the modified pole body so that only the segments of the gaps between the poles can perform the function of magnetic poles.

Description

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Ha3BaHHe_h306pβτεΗΗΗ

Ροτορ flJiH BO36y) KflaeMOň rt nocTOHHHbix μηγηητοβ anexTpHnecxoň ManiHHbí c BHyT-peHHHMH riOJBOCaMH 06naCTb ΠρΗΜεΗεΗΗΗ Η3θ6ρβΤβΗΗΗ H3o6peTěHne xacaeTCH deluge «on BO36y« flaeMoň οτ nocTOHHHbix μβγηητοβ an anion ΤρΗΊβΟΚΟή MaiDHHbl C ΒΗγτρβΗΗΗΜΗ nOJDOCHMH ΟΗΗΧΡΟΗΗΟΓΟ THna, ΠρΗΜβΗΗβΜΟήrnaBHbíM o6pa3OM b npHBOflax Tpex4> a3Horo Toxa c perymípyeMbiM hhcjiom o6opo-TOB.

XapaxTepHCTHKa H3BecTHbix TexHHnecxHx peměHHň H3BeCTHO, HTO ΠρΗΜβΗβΗΗβ HeflOpOm H BblCOXOXOSpiJHTHBHbIX XepaMHHeCXHXΜΗΓΗΗΤΟΒ (HanpHMep, φερρΗΤ 6apHH) flJIH φορΜΗρΟΒΗΗΗΗ ΠΟΛΗ BO36y «fleHHH B3JieKTpH« iecKnx MamHHax BCJieflCTBue manneb ocTaTowHoň MarHHTHoň HHflyxííHH 3ThxMarHHTOB TpeČyeT ΠΡΟΒεββΗΗΗ OCOĎblX MepOnpHHTHň flJIH flOCTHWeHHH, ΠΟ ΒΟ3ΜΟ5Κ-hocth, 6oJibmoro, OTHeceHHoro κ oflHOMy nonracHOMy mages, nonepenHoro ceneimaMarHHTOB. 3Ta Heo6xoflHMOCTb 3υτεκβετ H3 MexflyHapoflHon. TeHfleHpHH pa3BHTHH, HanpaBneH-Hoň Ha noBbímeHHoe Hcnonb3OBaHHe snexTpoMarHHTHoň axTHBHoň nacTH 3πεχτρΗ-necxoň MamHHbí, xoTopaa b 3HanHTenbHoň Hερε 3Hbhcht ot BenHHHHb MarHHTHoonHHflyKUHH B BO3flyraHOM 3β3θρε.

PaCnOJIOXOHHB MarHHTOB, yflOBJIBTBOPHIOIUHa ΤρεβοΒΗΗΗΗ B ΟΤΗΟΙΙίεΗΗΗ ČojlbmoronoToxa nómoca η ογρηηηηβηηη pa3MarHHHHBaionpix Harpy3OK, xapaxTepHayioTCHTBM, HTO MarHHTHblB 6JIOKH HaXOflHTCH MOJKfly ΟεΓΜΒΗΤβΜΗ JIHCTOBOH CTaJIH H3, H3 · KOTopbix coctoht naxeT cepflenHHxa. H3 sthx μβγηητοβ xax μηηημυμ «Ba Mar-HHTa 6noxa noflxmoneHbí napannenbHo.

Taxne MarHHTbi pacnonaraioTcn no OTHomeHKo x och ροτορβ jih6o 3Beafloj hjihTaHraHHHanbHo, πρκηεΜ hopmhjih noBepxHOCTb Bbixofla noToxa MarHHTOB pacno.no-κεΗΜ napnaHflHxynnpHO x sthm HanpaBneHHHM. Pa3flenHTenbHbiMH πιβημη Meaifly ot-flanbHblMH CBTMBHTaMH H3 HHCTOBOne CTaHH flO <% THraOTCH OnpCflCnBHHblH MarHHTHblbl πΟΤΟΧ paCCOHHHH. 248251 2 Πρ «TaHrenuMajibHOM pacnojioíKeHHH MarHHTHbix 6jiokob (DE-AS 1 173 178) b τ ο pe M M M M M M M M 3 J J J J J J..... 3TO BblTe-xae? Ha neoóxoflHMocTH ocBoeHHH ueHTpowHbix narpy3OK. flnn npeflOTBpamenHHpa3JieTaHHH This is what, xpoMe τογο, Heo6xoflHMbi cnenHanbHbie xpeneacHbie ane-ΜβΗΤΜ Η βθΜΠφβρΗΒΗ KJieTKa. Ban Potop fíOJIHCeH 6bITb Η3ΓΟΤΟΒηεΗ H3 floporo-CTOHmeň ΗΘΜΗΓΗΗΤΗΟΗ CTanH .. βΠΗ BO36y> K £, ehhh MHIUHH C BHyTpeHHHMH nOJHOCaMH NO paenOJIOMeHHbtMH B ροτορβ3Be3flOH MarHHTHblMH ÓHOXaMH H3B6CTHbI FLSA peuieHHH (DE-OS 2,412,307, DE-OS1763876). lime pacnoJioaceHH cornac DE-OS 2 412 307 (cm. Taxxe wypHan CHMCHca 49 (1975) 6, CTp. 368-374) Taxxe TepoyeTcn npHMeHSHne ηθμηγηητηογο Bana hjih, no xpHe Mepe, HeMarHHTHof BTynxH. 3tot Ban κπη BTynxa ημθθτ cjiojkhmhBHeiUHHII ΠρΟφΗΛΒ. OTfleJIhHbie cerMeHTbl H3 JIHCŤÓBOH CTanH, Meacfly XOTOpbIMHpacnojioaceHbí MarHHTHbie 6noxH, flonncHbí c3aflH 3axBaTbieaTb oTCToninHe προφκηΒ-Hbie nacTH Mine.

MarHHTHbie 6jiokh nonacHbí yflepjKHBaTbCH HeMarHHTHbíMH na3OBbiMH χπηηβημη, bxo-flamHMH b flEa npoTHBononoiKHbix cerMeHTa naxeTa cepfleiHHKa. Tax xax η npH.TaxoM pacnonoBceHHH ροτορ He irneeT cBHaaHHoro ochobhoto Tena naxeTa cep-fleHHKH, TO flJIH OCBOeHHH MeXaHHHeCKHX Harpy3OK flOmKHbl 6bITb npHHHTbl flo-nOJIHHTejIbHbie Mepbl aamHTbl. Η3ΓΟΤΟΒηβΗΗΘ TaKHX POTOPOB CBH33HO C ÓOHbHIHMH 33Τρ3Τ3Τ.

Bo btopom HSBecTHOM pacnonomeHHH (DE-OS 1 763 876) ocHOBHoe Teno poTopao6pa3yeTCH BTynxoň h nonoBHHoň Bcex nojnocoB. PacnonoaceHHbie Mencfly hhmh no-Jiioca, KOTopbie yftepxcHBaioT h MarHHTHbie ójiokh, xpenHTCa no. OTflenbHocra κ ny po pe 3 3 3 3 3 3 3 3 3 3 3 H H H H H H j H iace iace iace H H H H H H H OB OB OB OB OB OB OB OB npH T3KOM pacnojioaceHHHτεηο poTopa coctoht Tarace H3 HecxonbXHx oTflenbHbix pren. flanee cnenyeTOTMeTHTb, HTO OTHOCHTenbHO SOJIblUHe, oGyCnOBHeHHble H3rOTOBJieHHeM flOnyCKHraSapHTHbix pa3MepoB stHx MarHHTHbix 6jiokob πρκ thkom pacnonoaceHHH cxaabi-BaioTca ocoSeHHo oTpHixaTejibHo. OTflenbHbie nomoca, xoTppwe flonncHbí πρηοκημητβnojiHocTbio no noBepxHocra MarHHTbi c onpep; ejieHHbiM naBneHHeM κ Teny poTopa, HeOČxoflHMO noflorHaTb b OTflenbHocTH. Ilocjie οκοηηηηηη MOHTaxa b jiwSom cny-nae Tpe6yeTcn oÓTonxa Tena ροτορβ. ijenb Η3θ6ρετεΗΗΗ

IlejIbH) Η3θ6ρβΤβΗΗΗ HBJIHeTCH CO3flaHHe ΠρΟΟΤΟΓΟ, MexaHHHeCKH CTaÓHJIhHorOpoTopa, flonycxa »n? Ero npHMeHeHMe npocToro Baňa H3 μβγηητηογο MaTepnana H fljia npoH3BOflCTBa κοτοροΓΟ flies 6bino 6bi Hcnojib3OBaTb 3apeKOMeHfloBaBniHece6n τθχηοπογηη, oSbWHo npHMeHHeMbie NPH npoH3BOflCTBe acHHxpoHHbix ManiHH.

HanonceHne cygHOCTH Η3θ6ρετβΗΗΗ 3aflana H3o6peTeHHn coctoht b tom, ητο6ω co3flaTb Teno ροτορβ h paonononce-HHe MaTHHTOB, ΠΟ3ΒθηΗΚ »Π (OC flOCTHHb nejlb H3o6peTeHHH.

CornacHO H3o6peTeHHio 3TA 3aflana pemaeTcn τθμ, HTO MarHHTHbie Cjiokh pACN-b JiaraioTCH MarHHTHoň nocneflOBaTenbHocTH c οββΗχ ctopoh μοαηΦηιι; ηροβ3ηηογοTena nomoca Tax, ητο6μ τοηβχο cerMeHTbl npoMeacyTXOB Mencny nomocaMH μογηη6bl BbinOnHHTb φνΗΧΙΙ, ΗΙΟ MarHHTHbIX nOHIOCOB.

Meacfly ocHOBaHHeM Tena ροτορβ h hh »chhmh ctopohhmh xaxflbix nsyx μηγηητημχ 248251 3 ÓJIOKOB COCeflHHX ΜΟΑΗφΗΑΗρΟΒΗΗΗΜΧ nOJDOCOB, KPAH KOTOpbIX CTOJIKHyTCH B 3TOMMecTe, HaxoflHTCH o6pa3yioinHe pa3fleJiHTejibHbie πιβμ npoxnaflXH ηθμηγηητηογοMaTepHana H3. Ban ΒωποηΗβΗ H3 μηγηητηογο MaTepnana. Meacfly hhjkhhmh οτοροηβμηnOJHOCHblX SauimaKOB H BepXHHMH CTOp.OHaMH XaMCflblX flByx MaFHHTHblX Sjiokob pacno-JioJKeHbi BbiCTynaromne HeMarHHTHbie kjihhbh.

. npHMep OCymeCTBJiHHH H3O6peTeHHH

Bonee noflpočHO Η3θδρετβΗΗβ noncHHeTCH Ha npHBefleHHOM Pots npHMepe nčnon-ηθηηη. Ha rtpHJiaraeMbix HepTeacax noxa3aHbi: ΦΗΓ. .1: POTOP flBeHaftUaTHnOJHOCHOň CHHXpOHHOÍ ManiHHbl B nonepeHHOMpa3pe3e Φηγ. 2: npoflonbHbift pa3pe3 afterTop Φηγ. 3: pa3pe3 poTopa, -nonočTb 3anHTa HeMarHHTHbíM MaTepnanoM, IIoKa3aHHoe Ha Φηγ. 1 τβηο poTopa 1 coctoht H3 of lHoro Čnoxa, MaccHBHoroΗΠΗ CO6paHHOrO H3 HHCTOB CTaJIH.

Ban MamHHa 2 BbinonHeH H3 MarHHTHoň cTajiH.

MarHHTHbie δποχκ 3.4 pacnonoaceHbí nOFL μοαηΦηαηροββηημμ nojnocHOM 6amMaxoM 5.MarHHTHbie δηοχΗ 3.4 η μοαηΦηαηροββηημθ cerMeHTbi npoMeacyTxoB Mexfly nojnocaMH 6 ΠΠΟΤΗΟ 3aJKHMaiOTCH HeMarHHTHblMH npOKJiaflKaMH OCHOBaHHH nojnocah 7 y 8 y KJiHHbHMH MOflHflHflHpOBaHHoro noniocHoró 6amMaxa fifth IIoBepxHócTb cerium MeHTOB 6 npoMewyTKOB Meacfly nojnocaMH BhinojiHena Tax, nonynaeTCH CHHy-coHflajibHaa XapaxTepHCTHxa nojia BO36yacfleHHH. KpoMe · foro, Ha Φηγ. 1 noxa3aHbi xapaxTepHCTHHecxHe πηηηη ποπη none3Horo noTOxa Φ · Ν h npoxoflnmero nepe3HeMarHHTHbie npoxnaflXH 7 χπηηβη 8 μβγηητηογο noToxa paccenHHH <Pg. BBHfly Toro, HTO-φνΗχμΗΟΗβ ίΠιΗΗε 3aflawH nojnocoB Teji deluge Taxoro poflaCBOflHTCH JiHmb ocBoeHHK x) MexaHHnecxHX Havpý3ox (ΜΟΑΗφΗΗΗροΒβΗΗωβ nonioca) OHH Ballad 6bITb BbinOJIHeHbl SXCTpeMaJlbHO TOHXHMH, 6narOflapH hemY Ballad 6bITbHCnOJlb3OBaHbI MarHHTHbie δΠΟΧΗ C ÓOJIbUIOH nOBepXHOCTbH) BbIXOfla NOTOX. HyHX-flHIO. MarHHTHbIX nOJHOCOB XΠΟΠΗΗΙΟΤ HaXOflHmHeCH B ΜΟΑΗφΗΑΗρΟΒΒΗΗΜΧ npOMe «yTXaXMeiKfly nojnocaMH οθγμθητμ, BbinojiHeHHbie MaccHBHo hjih coópaHHbie H3 nHCTosonCTajiH. *. ·

Ha φΗΓ. 2 nOXa3aH POTOP, 6JIOXH nOCTOHHHbIX ΧΟΤΟΡΟΓΟ ΧΟΤΟΡΟΓΟ B OCeBOM Ha-npaBJiHHH coctoht H3 flByx nacTHHHbix δποχοΒ. OcHOBHoe Teno Potop η moah-φΗΗΗρΟΒΗΗΗΜε ΟΘΓΜΘΗΤΜ npOMeSCyTXOB MejKfly nojnocaMH COĎpaHbl H3 JIHCTOB CTajiH.CoeflHHeHHe naxeTa cepflenHHxa b oceeoM HanpaBjíeHHH, BxmonaH 6jioxh ποοτοηη-HblX MarHHTOB, npOH3BCtflHTCH XAX H y HOpMajIbHbIX POTOPOB nHJIHHflpHHeCXOrOTHna. EoxoBbie nnacTHHbi 9aojekhm 6biTb oflnaxo> BbinojiHeHbi H3 ηθμηγηητηογο Ma-Tepnana. 3ηποπηητβ npn bt H3BecTHbiM o6pa3OM Becb naxeT H3 HecxonbXHxOTflenbHbix naXeTOB, OTflenneMbix flpyr ot flpyra ηθμβγηητημμη manyoMH, He Hyac-ho. HaflejKHoe eoeflHHeHHe cerMeHTOB H3 SouthToeTCH πρΗΜΘΗβΗΗβΜ flByx OTJIHHaiOtUHXCH no flJIHHe ΤΗΠΟΒ Mar-HHTHbix 6jioxob, xoTopbie, nepeflyncb, pacnojioaceHbí b ocBOM HanpaBjíeHHH hno oxpyacHocTH.

Ha Φηγ. 3 noxa3aH qacTHHHbift pa3pe3 poTopa, y xoToporo Tejio poTopa coÓpaHo, H3 JIHCTOB CTaJIH.

IοΑΗφΗΑΗροΒβΗΗωβ nojnocHbie SaniMaxH 5, BxmonaH HeMarHHTHbie xjihhh 8, ηθχοαητ-ch B Φοοηημχ fleTanHx 14, xoTopbie BbinojiHeHM, HanpHMep, H3 amoMHHHH. 6o C-KOBblX CTOPOH HaXOflHTCH TOpfleBbie XOJIbfla 12th EcJIH COOTBeTCTBHH B C 248 251 yCJIOBHHMH SKcnjiyaTaqHH TpeSyeTCH BCTpoňKa κομπηθετηοη ΛβΜπφβρΗοή κηβτκκ, το certifi- iμθητη προΜβχγτκοΒ Mewpy nomocaMH Ballad cHafíjKáTbCH KaHaBKaMH ρ 13, ηα κρεπ-JlfeHHfl K.TICTKH.

BbHlOJIHeHHaH H3 amOMHHHH φβΟΟΗΗβΗ fleTaJIb 14, CTepHCHH, HaXOflHIUHeCH B Κ3Η3Β —Kax 13, h ToppeBbie Konbija 12 o6pa3yioT COMNNKTHyio ρβΜπφερΗϊπο KneTKy, koto-pan Μοκετ H3roTaBnHBaTbcn cnocofioM jiHTba nofl paBneHHeM.

OcTaBJíeHHaa Hanan what ctopohm BO3aymHoro 3a3opa nepeMbWKa (nyHKTHpHanJIHHHH Ha φΗΓ. 3) CJIJOKamaH NPH Η3ΓΟΤΟΒηβΗΗΗ JIHCTOBOH CT3J1H deluge FL-ΠΗ COE-ΑΗΗθηηη οοηοβηογο Tena deluge 1 c μο, ρηΦηρηροββηημμη cerMeHTaMH 6 npoMeacyT-Cob Mewfly noniocaMH, night c6opkh h 3Hjihbkh POROPAT ycTpaHneTcn oStohkoh , floBoflHome Tejio poTopa κ ero OKomaTenbitoMy pa3Mepy.

,ΟρΜν, ΙΉ HSOĎpeTCHHH 1. τοτορ fljiH BO36ywp; aeMOH οτ ποοτοηηημχ μηγηητοβ aneKTpHnecKOH ManiHHb cBHyTpeHHHMH noniocaMH CHHxpoHHoro THna, cocTOHmHn H3 οοηοβηογο TenapoTopa, BblHOJIHGHHOrO B BHfle. Potop C BblCTynaroiUHMH nOmOCaMH H3 BTyJIKH, ΜΟΑΗφΗΙίΗρΟΒβΗΗΗΧ TCJI HOJBOCOB H Μ0ΡΗφΗΗΗρθΒ3ΗΗΜΧ nOJHOCHMX SaHIMaKOB, ΠΡΗΗΘΜ MarHHTHbie SjIOKH, HOpMaJIH nOBepXHOCTeň BblXOfla nOTOKa KOTOpbIX on-pannenbHbí KacaTenbHbíM Bana MamHHbí, nepeayncb, oTfleneHH flpyr οτ pyr MOflP ^ HHupoBaHHbíM τβηοΜ nojnoca h cerMeHTOM npoMeacyTKa Me "ny noniocaMH , oTjiHHaromuňCH τβΜ, ητο HaxoflHmuécfl c o6enx ctopoh μοαηΦηιχηροβηηηογοTena nomoca MarHHTHbie ójiokh pacnonoaceHbí b μηγηητηοΑ nocnenoBaTenbHoc-TH H3-3a Hero φyHK ^ HIO MarHHTHbIX nOJBOCOB BbmOJlHHIOT TOJIbKO CerMeHTbl MeiKyTKOB NPO-Me) K nojnocaMH QY. . "2. Ροτορ fljifl BO36yjKflaeMoň οτ ποοτοηηημχ μηγήητοβ aneKTpHnecKoň MamHHbí cBHyTpeHHHMH noniocaMH Comach nyHKTy 1 oTnHnaromHňcn τθμ MTO μο ^ ηΦη-UHpoBaHHbie npoMeacyTKH Mexfly noniocaMH 3anonHeHbi BbinojiHeHHbíMH H3 jihctobCTaJIH ΗΠΗ MaCCHBHblMH ΜΒΓΗΗΤΗΜΜΗ ΜΟΑΗφΗΙίΗρΟΒΗΗΗΜΜΗ CerMeHTaMH npOMexyT-kob Meacfly noraocaMH (6) c oSpasyromeň BO3flyniHbiň 3a3op noBepxHOCTbio. Third Ροτορ fljin BO36yxflaeMOň οτ ποοτοηηημχ MarHHTOB aneKTpHHecKOH MamHHbí c BHyTpeHHHMH noniocaMH cornacHo nyHKTy 1 oTnnnaioinHHCH τβΜ, ητο MeacpyocHOBaHHeM οοηοβηογο Tena flood (1) h ^ ηη κηθη cropoHoň flByx coceflHHxMarHHTHbix βηοκοΒ, Kpan kotopmx οτοηκΗγτοη b btom MECT, HaxoflHTcn 06 pa3yioinHe pa3flenHTenbHbie πιβμ npoKnaflKH (7) H3 ηθμηγηκτηογο MaTepnana h ητο Ban BbinonHeH H3 μβγηητηογο MaTepHana. '4 · .Ροτορ PNN BO36yxaaeMoň οτ ποοτοηηημχ μηγηητοβ aneKTpHnecKoň MamHHbí cBHyTpeHHHMH noniocaMH cornacHO nyHKTy 1 OTnHnaiomHňcH τθμ, HTO HeMarHHTHbie KnHHbl (8) HHH HeMarHHTHbie φ3ΟΟΟΗΜβ fleTanH ( 14), B KOTOpbIX o6beaH-HeHbí ΜθβΗφΗΗΗροΒ3ΗΗΗθ noraocHbie SamMaKH (5), BKraonan HeMarHHTHbie κπηημ (8), b MecTe c τορηεβμμη KonbaaMH (12) oSpasyioT ΑεΜπφβριινιο KneTKy.

AHHOTaHHH H3o6peTeHHe KacaeTCH deluge flna BO36yacaaeMoň οτ ποοτοηηημχ μηγηητοβ 3ηεκτ- * PHnecKoň MamHHbí c BHyTpeHHHMH noniocáMH CHHxpoHHoro THna, πρημθηηθμοη rnaB-hmm o6pa3QM b npHBopax τρεχφΒ3ΗθΓο Tokai c perynHpyeMbiM and HHcnoM οδοροτοΒ. Henbio Η3θ6ρβτβΗΗ · «ηβ, πηθτοι C03aaHHe 'npocToro, MexaHHnecKH CTaSHnbHoro O- Topa, flonycKaiomero npHMeHeHHe npocToro Bana H3 μβγηητηογο MaTepHana h pnanpoH3BoacTBa κοτοροΓο mojkho δωπο 6 m Hcnonb3OBaTb 3apeKOMeHaoBaBniHe ce6n ΤβΧΗΟΠΟΓΗΗ 5 248 251, 06bIMH0 ΠρΗΜβΗΗβΜΜβ ItpH npOH3BOflCTBe aCHHXpOHHblX ΜθΠΙΗΗ.CornacHo Η3θ6ρβτβΗΜο 3TA sanaua pemaeTca τβΜ, ίτο μβγηητημθ Ojiokh pacnonavťawTcn b MarHHTHoft nocJiefloBaTenbHocTH c o6enx ctopoh μοαηΦηπμροββηηογοTena nonioca Tax , ητοθω Tonbxo cerMeHTbi npoMexyTKOB Mexfly noraocaMH μογπη βω BblTIOJIHHTb φγΗΚΒ, ΜΚ) ΜβΓΗΗΤΗΜΧ n OJDOCOB. ΠρΗ3Η3ΗΟ Η3θ6ρβΤβΗΗβΜ ΠΟ pesyjlbTaTaM 3KCnepTH3bl, OCymeCTBJeHHOft BeflOMCTBOMno pfin &amp; M H3o6peTeHHn h.naTeHTOB TflP. 2 nepTexa 248251

Claims (4)

OBJECT OF THE INVENTION A rotor for an electric machine driven by permanent magnets with internal poles of synchronous type, consisting of a basic body made as a rotor with expressed poles, of a housing, of modified pole bodies and of modified pole pieces, whereby the magnetic blocks, whose output flow areas are parallel to the tangential shafts of the machine are alternately separated by a modified pole body and a pole gap segment, characterized in that the magnetic blocks located on both sides of the modified pole body are spaced apart in a magnetic sequence so that only the segments of the gaps fulfill the magnetic pole positions between the poles. 2. An internal machine-driven electric machine-driven rotor according to claim 1, wherein the polysigned gaps between the poles are filled with segments of steel sheets or massive magnetic modified segments between poles (6) with the air gap forming surface. 5. An internal machine-driven electric machine driven rotor according to claim 1, wherein inserts are disposed between the base of the rotor base (1) and the lower side of two adjacent magnetic blocks whose ends rest at this location. (7) a non-magnetic material forming separating gaps, wherein the shaft is of magnetic material. 248 251 4. Rotor for electric machine driven by permanent magnets β by internal poles according to claim 1, characterized in that the female magnetic wedges (8) or non-magnetic shaped elements (14) which contain modified pole pieces (5), including non-magnetic wedges (8) together with the front rings (12) form a damping cage.