【摘要】：永磁無刷電機具有結(jié)構(gòu)簡單、高效率、高功率密度等優(yōu)點,廣泛應(yīng)用于各個領(lǐng)域。永磁形狀是永磁電機磁場分布的關(guān)鍵因素之一。研究永磁無刷電機的磁極結(jié)構(gòu)和電磁特性具有理論意義和工程價值。首先給出了從2段、3段到N段的Halbach陣列永磁電機的解析模型,獲得了氣隙磁密的波形。有限元法驗證了解析模型的正確性。然后對于無槽永磁電機,分析了等厚和不等厚磁極組合結(jié)構(gòu),通過分區(qū)域求解拉普拉斯和準泊松方程,根據(jù)磁場邊界條件,建立了等厚和不等厚永磁電機的氣隙磁密、感應(yīng)電動勢、電磁轉(zhuǎn)矩的解析法模型,分析了邊磁磁化角以及極對數(shù)對氣隙磁密的影響,并用解析法獲得了最優(yōu)邊磁磁化角和最優(yōu)永磁厚度。接著,在無槽電機的基礎(chǔ)上,利用保角變換的方法,求解了無槽電機到定子有矩形槽的相對磁導函數(shù),建立了等厚和不等厚有槽永磁電機的解析模型。并用解析法獲得了最優(yōu)邊磁磁化角。有限元法驗證了無槽電機和有槽電機解析模型的正確性。最后給出了不等厚不對稱磁極組合結(jié)構(gòu)的永磁電機,分析了極對數(shù)變化對氣隙磁密和永磁利用率的影響。分析結(jié)果表明,不等厚不對稱磁極組合結(jié)構(gòu)不僅能夠節(jié)約材料,還可以提高電機性能。為永磁電機的優(yōu)化設(shè)計提供了理論參考。
[Abstract]:Permanent magnet brushless motor is widely used in various fields because of its simple structure, high efficiency and high power density. Permanent magnet shape is one of the key factors in magnetic field distribution of permanent magnet motor. It is of theoretical significance and engineering value to study the magnetic pole structure and electromagnetic characteristics of permanent magnet brushless motor. Firstly, the analytical model of Halbach array permanent magnet motor from 2, 3 to N segments is given, and the air gap magnetic density waveform is obtained. The finite element method is used to verify the correctness of the analytical model. Then for slotless permanent magnet motor, the composite structure of equal-thickness and unequal-thickness magnetic poles is analyzed. The Laplace and quasi-Poisson equations are solved in different regions. According to the boundary conditions of magnetic field, the air-gap magnetic density of equal-thickness and unequal-thickness permanent magnet motors is established. The influence of edge magnetization angle and pole logarithm on air gap magnetic density is analyzed, and the optimal edge magnetization angle and optimal permanent magnet thickness are obtained by analytical model of induction electromotive force and electromagnetic torque. Then, on the basis of slotless motor, using conformal transformation method, the relative magnetic conductivity function from slotless motor to stator with rectangular slot is solved, and the analytical model of equal thickness and unequal thickness slotted permanent magnet motor is established. The optimal edge magnetization angle is obtained by analytical method. The analytical models of slotless motor and slotted motor are verified by finite element method. Finally, the influence of pole logarithm change on air gap flux density and permanent magnet utilization efficiency is analyzed for a permanent magnet motor with unequal thickness asymmetrical magnetic pole combination structure. The results show that the composite structure can not only save the material but also improve the performance of the motor. It provides a theoretical reference for the optimization design of permanent magnet motor.
【學位授予單位】：合肥工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM351

【參考文獻】

相關(guān)期刊論文 前10條

1 寇寶泉;曹海川;張曉晨;;新型結(jié)構(gòu)高速無槽永磁同步電機研究[J];電機與控制學報;2016年06期

2 耿偉偉;張卓然;;新型外轉(zhuǎn)子Halbach永磁陣列定子無鐵心電機設(shè)計與分析[J];電工技術(shù)學報;2015年14期

3 寇寶泉;曹海川;李偉力;張曉晨;;新型雙層Halbach永磁陣列的解析分析[J];電工技術(shù)學報;2015年10期

4 宋玉晶;張鳴;朱煜;;Halbach永磁陣列磁場解析求解及推力建模[J];電工技術(shù)學報;2014年11期

5 井立兵;章躍進;;Halbach陣列同心式磁力齒輪磁場全局解析法分析[J];電機與控制學報;2014年10期

6 劉大龍;;無槽永磁無刷直流電機的優(yōu)化設(shè)計模型研究[J];計算機仿真;2014年08期

7 李延升;竇滿峰;駱光照;;不同充磁方式的對轉(zhuǎn)永磁電機氣隙磁場性能研究[J];四川大學學報(工程科學版);2014年01期

8 張魯;寇寶泉;趙斌超;羅俊;;新型Halbach次級結(jié)構(gòu)永磁同步直線電機[J];電工技術(shù)學報;2013年07期

9 范堅堅;吳建華;李創(chuàng)平;周紅芳;;分塊式Halbach型磁鋼的永磁同步電機解析[J];電工技術(shù)學報;2013年03期

10 井立兵;章躍進;;同心式磁力齒輪磁場及轉(zhuǎn)矩全局解析法分析[J];中國電機工程學報;2012年30期

，

本文編號：2444836