本文選題：磁通切換永磁電機(jī)　切入點(diǎn)：外轉(zhuǎn)子　出處：《江蘇大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著經(jīng)濟(jì)的快速發(fā)展,汽車產(chǎn)銷量逐年增加,它在給人類生活帶來(lái)便利的同時(shí),也造成了環(huán)境的污染和資源的短缺。因此,節(jié)能環(huán)保的電動(dòng)汽車(electric vehicles,簡(jiǎn)稱EVs)成為了汽車行業(yè)發(fā)展的趨勢(shì)。其中,四輪驅(qū)動(dòng)(four-wheel drive,簡(jiǎn)稱4WD)電動(dòng)汽車由于高穩(wěn)定性和舒適性等優(yōu)點(diǎn)在汽車工業(yè)領(lǐng)域得到了廣泛關(guān)注。作為電動(dòng)汽車4WD系統(tǒng)的重要組成部分,輪轂電機(jī)由于高效率、控制靈活等優(yōu)點(diǎn),在車用驅(qū)動(dòng)電機(jī)領(lǐng)域成為了新興的研究方向之一。作為永磁無(wú)刷(permanent magnet brushless,簡(jiǎn)稱PMBL)電機(jī)種類之一,磁通切換永磁(flux-switching permanent magnet,簡(jiǎn)稱FSPM)電機(jī),由于高轉(zhuǎn)矩密度、高效率、轉(zhuǎn)子結(jié)構(gòu)簡(jiǎn)單等優(yōu)點(diǎn),在輪轂電機(jī)直驅(qū)應(yīng)用場(chǎng)合具有潛在的應(yīng)用前景。本文將輪轂電機(jī)的概念融入到了FSPM電機(jī)中,對(duì)兩臺(tái)具有創(chuàng)新性結(jié)構(gòu)的外轉(zhuǎn)子輪轂FSPM電機(jī)進(jìn)行了深入研究。主要研究成果包括以下幾個(gè)方面:1.提出了兩臺(tái)外轉(zhuǎn)子輪轂FSPM電機(jī)的基本結(jié)構(gòu),包括:“I”型FSPM電機(jī)和“V”型FSPM電機(jī),并闡述了該類電機(jī)的基本運(yùn)行原理;2.建立了外轉(zhuǎn)子FSPM電機(jī)設(shè)計(jì)的一般性方法,特別是推導(dǎo)出了輸出轉(zhuǎn)矩、定子槽面積和永磁體利用率之間的一般關(guān)系,為設(shè)計(jì)高轉(zhuǎn)矩密度的外轉(zhuǎn)子FSPM電機(jī)提供了理論依據(jù);3.針對(duì)外轉(zhuǎn)子FSPM電機(jī)結(jié)構(gòu)復(fù)雜,設(shè)計(jì)變量較多等特點(diǎn),提出一種基于電機(jī)設(shè)計(jì)變量“敏感度分層”的多目標(biāo)優(yōu)化策略,該策略將設(shè)計(jì)變量分為兩層,并對(duì)這兩層設(shè)計(jì)變量采用不同的優(yōu)化方法,實(shí)現(xiàn)了電機(jī)的輸出轉(zhuǎn)矩、轉(zhuǎn)矩脈動(dòng)和定位力矩多個(gè)設(shè)計(jì)目標(biāo)之間的綜合最優(yōu)解;4.在確定兩臺(tái)電機(jī)最優(yōu)尺寸之后,詳細(xì)分析了兩臺(tái)電機(jī)的基本性能。此外,為了更加系統(tǒng)的評(píng)估兩臺(tái)電機(jī)的結(jié)構(gòu)特點(diǎn),本文從相同電密與相同槽滿率、相同銅耗以及相同相電流三個(gè)方面,全面比較分析了兩個(gè)電機(jī)的轉(zhuǎn)矩特性和永磁體利用率。研究揭示出,“V”型外轉(zhuǎn)子磁通切換永磁電機(jī)具有更高的轉(zhuǎn)矩密度和永磁體利用率。5.加工了兩臺(tái)原理樣機(jī),并搭建了實(shí)驗(yàn)平臺(tái),實(shí)驗(yàn)驗(yàn)證了理論分析和有限元仿真結(jié)果的準(zhǔn)確性,為該類外轉(zhuǎn)子FSPM電機(jī)實(shí)用化研究提供了理論和實(shí)驗(yàn)基礎(chǔ)。
[Abstract]:With the rapid development of economy, automobile production and sales increase year by year. It not only brings convenience to human life, but also causes environmental pollution and shortage of resources. Electric vehicles, or EVss, have become the trend of the automobile industry. The four-wheel drive (4WD) electric vehicle has been widely concerned in the automotive industry because of its high stability and comfort. As an important part of the 4WD system of electric vehicle, the hub motor has the advantages of high efficiency and flexible control. As a kind of permanent magnet brushless permanent magnet permanent magnet permanent magnet brushless motor, flux switching permanent magnet flux-switching permanent permanent (FSPMN) motor has become one of the new research directions in the field of automobile driving motor, because of its high torque density and high efficiency. In this paper, the concept of hub motor is integrated into FSPM motor because of its advantages such as simple rotor structure and potential application prospect in direct-drive application of hub motor. Two outer rotor hub FSPM motors with innovative structure are studied in this paper. The main research results include the following aspects: 1.The basic structure of two outer rotor hub FSPM motors is proposed, including: "I" type FSPM motor and "V" type FSPM motor. The general design method of outer rotor FSPM motor is established, especially the general relationship among output torque, stator slot area and permanent magnet utilization ratio is derived. This paper provides a theoretical basis for the design of outer rotor FSPM motor with high torque density. In view of the complex structure and many design variables of the outer rotor FSPM motor, a multi-objective optimization strategy based on the "sensitivity stratification" of the motor design variable is proposed. The strategy divides the design variables into two layers and adopts different optimization methods to realize the output torque of the motor. After determining the optimal size of the two motors, the basic performance of the two motors is analyzed in detail. In addition, in order to evaluate the structural characteristics of the two motors more systematically, In this paper, there are three aspects: the same electric density and the same tank full rate, the same copper consumption and the same phase current. The torque characteristics and permanent magnet utilization ratio of the two motors are compared and analyzed comprehensively. The results show that the "V" type external rotor flux switching permanent magnet motor has higher torque density and permanent magnet utilization ratio .5. two principle prototypes are machined. An experimental platform is built to verify the accuracy of theoretical analysis and finite element simulation results, which provides a theoretical and experimental basis for the practical research of this kind of outer rotor FSPM motor.
【學(xué)位授予單位】：江蘇大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM351

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