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1、2014年3月電工技術(shù)學(xué)報(bào)Vol.29No.3第29卷第3期TRANSACTIONSOFCHINAELECTROTECHNICALSOCIETYMar.2014分?jǐn)?shù)槽集中繞組永磁同步電機(jī)的電感計(jì)算陳益廣(天津大學(xué)電氣與自動(dòng)化工程學(xué)院天津300072)摘要在少槽多極的分?jǐn)?shù)槽集中繞組永磁同步電機(jī)中,存在幅值較大的次諧波和與基波繞組系數(shù)相同的高次諧波,特別是存在與基波繞組系數(shù)相同、轉(zhuǎn)向相反、幅值很大、極對(duì)數(shù)與基波相差僅幾對(duì)極的諧波。使得電機(jī)的電樞反應(yīng)諧波磁場(chǎng)很強(qiáng),與之相對(duì)應(yīng)的諧波漏抗很大,電機(jī)的總漏電感
2、很大,其基波勵(lì)磁電感與傳統(tǒng)短距分布繞組電機(jī)相比小很多。一般情況下,漏電感都比勵(lì)磁電感還大。在對(duì)電機(jī)磁路進(jìn)行理想假定的條件下,針對(duì)不同槽極數(shù)組合的單元電機(jī),推導(dǎo)出該類電機(jī)電感參數(shù)的計(jì)算公式。其中,電樞反應(yīng)基波勵(lì)磁電感計(jì)算公式與傳統(tǒng)的交流繞組相同,而電樞反應(yīng)總電感和諧波漏電感計(jì)算不同于傳統(tǒng)的交流繞組。關(guān)鍵詞:永磁同步電機(jī)分?jǐn)?shù)槽集中繞組電感計(jì)算中圖分類號(hào):TM340InductanceCalculationofPermanentMagnetSynchronousMachinesWithFractiona
3、l-SlotConcentratedWindingChenYiguang(TianjinUniversityTianjin300072China)AbstractBigamplitudesub-harmonicsandhigherorderharmonicswithsamewindingcoefficientasfundamentalcomponent,especiallytheharmonicswithsamefundamentalwindingcoefficient,differentdire
4、ctionrotation,bigamplitudeandsmallpolenumberdifference,allexistsinthefractional-slotconcentratedwindingpermanentmagnetsynchronousmachine(PMSM)withfewslotsandmultiplepoles.Thesecanleadtoastrongarmaturereactionharmonicfield,consequentlywithasignificanth
5、armonicleakagereactanceandoverallleakageinductance.Further,itcanbefoundthatthefundamentalcomponentmagnetizinginductanceismuchlowerthanthatofthetraditionalshortpitchdistributedwindingPMSM,andtheleakageinductanceisbiggerthanthemagnetizinginductance.Then
6、theinductancecalculationformulasarederivedforsuchmachineswithvariednumberofslotsandpolesunderidealcondition.TheresultsshowthattheformulaforthefundamentalcomponentofarmaturereactionmagnetizinginductanceissameasthatforthetraditionalACmachines.However,th
7、eformulasforthearmaturereactionoverallinductanceandtheharmonicleakageinductancearechanged.Keywords:Permanentmagnetsynchronousmachine,fractionalslot,concentratedwinding,inductancecalculation圈繞制在1個(gè)定子齒上,節(jié)距為1,即1個(gè)線圈鑲1引言嵌在2個(gè)相鄰的定子槽中,槽距接近于1個(gè)極距,越來(lái)越多的低速永磁同步電動(dòng)機(jī)定
8、子采用少槽線圈端部短,省銅,銅耗少;定子槽數(shù)少,槽利用多極的分?jǐn)?shù)槽集中繞組;分?jǐn)?shù)槽集中繞組的每個(gè)線率高;嵌線工藝簡(jiǎn)化,可以采用自動(dòng)繞線,勞動(dòng)生產(chǎn)率高;定、轉(zhuǎn)子不用斜槽、斜極或其他措施,齒收稿日期2012-03-10改稿日期2012-12-10槽轉(zhuǎn)矩就能降至很小,轉(zhuǎn)矩波動(dòng)?。欢ㄗ永@組的永120電工技術(shù)學(xué)報(bào)2014年3月磁電動(dòng)勢(shì)波形好??傊来磐诫姍C(jī)采用分?jǐn)?shù)槽Z0Nq??(5)[1-2]2mpd集中繞組能提高效率和功率密度,節(jié)約成本。但0是,電機(jī)內(nèi)部還存在幅值較大的次諧波以及繞組系