發(fā)布時間：2018-03-25 01:27

  本文選題：永磁同步電機(jī)　切入點(diǎn)：軸向磁場　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：軸向磁場永磁同步電機(jī)軸向尺寸短、轉(zhuǎn)矩密度高,易于實(shí)現(xiàn)多盤模塊化及輕量化,一直備受對簧下質(zhì)量和軸向空間有極高要求的混合電驅(qū)動輪式車輛研究領(lǐng)域的關(guān)注。但該類電機(jī)因其表貼式永磁體結(jié)構(gòu),使其弱磁擴(kuò)速能力受到制約,影響了其在輪轂系統(tǒng)中的進(jìn)一步應(yīng)用。本文對軸向磁場反凸極永磁同步電機(jī)(NSAFPMSM)開展研究,通過分析轉(zhuǎn)子側(cè)軟磁材料和永磁材料的構(gòu)成比例和組合方式,研究凸極比的變化規(guī)律,給出了不同轉(zhuǎn)子磁極結(jié)構(gòu)對電機(jī)弱磁擴(kuò)速能力的影響,以期解決傳統(tǒng)軸向磁場永磁同步電機(jī)弱磁擴(kuò)速能力弱的問題。主要研究內(nèi)容包括以下幾個方面:首先,針對不同NSAFPMSM磁極結(jié)構(gòu)分析其磁路特點(diǎn),并仿真研究不同磁極結(jié)構(gòu)對電機(jī)磁場分布的影響。從理論上對比不同凸極性電機(jī)運(yùn)行特性之間的差異,分析其在控制上的異同。結(jié)合電機(jī)特點(diǎn)總結(jié)軸向磁場反凸極永磁同步輪轂電機(jī)的設(shè)計(jì)原則,并給出改變磁極結(jié)構(gòu)電機(jī)電壓方程和轉(zhuǎn)矩方程所發(fā)生的變化。其次,基于磁路法對分?jǐn)?shù)槽集中繞組NSAFPMSM的電感進(jìn)行理論推導(dǎo),給出不同磁極結(jié)構(gòu)電機(jī)交、直軸電感的計(jì)算公式,分析磁路不飽和與磁路飽和時電感表達(dá)式之間的差異,并利用有限元仿真進(jìn)行驗(yàn)證。仿真對比分?jǐn)?shù)槽集中繞組和整數(shù)槽分布繞組對電機(jī)電感的影響情況。再次,理論研究永磁同步電機(jī)電感、磁鏈等變化對電機(jī)功率輸出特性的影響,并從功率輸出特性角度指出不同凸極性電機(jī)的適用條件。借助有限元方法對比研究串、并聯(lián)轉(zhuǎn)子磁極結(jié)構(gòu)對NSAFPMSM弱磁擴(kuò)速范圍和輸出功率的影響,以及不同徑向并聯(lián)組合磁極對電機(jī)的影響情況。最后,分析影響反凸極永磁同步電機(jī)最大轉(zhuǎn)矩/電流運(yùn)行內(nèi)功率因數(shù)角的因素,并在此基礎(chǔ)上對電磁轉(zhuǎn)矩的成分進(jìn)行分析。對影響該類電機(jī)轉(zhuǎn)矩波動的齒槽轉(zhuǎn)矩和紋波轉(zhuǎn)矩分別進(jìn)行分析與抑制,提出新磁極結(jié)構(gòu)以達(dá)到更好的轉(zhuǎn)矩波動抑制效果。
[Abstract]:Axial magnetic field permanent magnet synchronous motor has short axial dimension, high torque density and easy to realize multi-disk modularization and lightweight. The research field of hybrid electric drive wheeled vehicles with extremely high requirements for underspring mass and axial space has been paid much attention to. However, due to its permanent magnet structure, the speed expansion ability of this kind of motor is restricted by its weak magnetic field. In this paper, the axial magnetic field inverse salient pole permanent magnet synchronous motor (NSAFPMSM) is studied. By analyzing the composition and combination of soft magnetic material and permanent magnet material in rotor side, the variation law of salient pole ratio is studied. The influence of different rotor pole structures on the weak magnetic expansion ability of the motor is given in order to solve the problem of the weak magnetic field expansion ability of the traditional axial magnetic field permanent magnet synchronous motor. The main research contents include the following aspects: first of all, The magnetic circuit characteristics of different NSAFPMSM magnetic pole structures are analyzed, and the effects of different magnetic pole structures on the magnetic field distribution of the motor are simulated, and the differences between the operating characteristics of different salient polarity motors are compared theoretically. The design principle of the axial magnetic field reverse salient permanent magnet synchronous hub motor is summarized, and the changes of voltage equation and torque equation of the motor with changing magnetic pole structure are given. Based on the magnetic circuit method, the inductance of fractional slot concentrated winding NSAFPMSM is derived theoretically, and the calculation formulas of alternating and straight axis inductance of motor with different magnetic pole structures are given, and the difference of inductance expression between magnetic circuit unsaturated and magnetic circuit saturation is analyzed. The effects of fractional slot concentrated winding and integer slot distributed winding on motor inductance are compared by finite element simulation. Thirdly, the influence of permanent magnet synchronous motor inductance and flux chain on motor power output characteristics is studied theoretically. The application conditions of different salient polarity motors are pointed out from the point of view of power output characteristics. By means of finite element method, the effects of magnetic pole structure of series and parallel rotor on NSAFPMSM weak magnetic expansion range and output power are studied. And the influence of different radial parallel combined poles on the motor. Finally, the factors affecting the maximum torque / current running power factor angle of the inverse salient permanent magnet synchronous motor are analyzed. On this basis, the composition of electromagnetic torque is analyzed. The slotting torque and ripple torque which affect the torque ripple of this kind of motor are analyzed and suppressed respectively, and a new magnetic pole structure is proposed to achieve better torque ripple suppression effect.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM341

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 梁臣;電動汽車用感應(yīng)電機(jī)關(guān)鍵技術(shù)的研究[D];哈爾濱工業(yè)大學(xué);2008年

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本文編號：1660942