本文選題：磁通切換永磁電機　切入點：外轉子　出處：《江蘇大學》2017年碩士論文　論文類型：學位論文

【摘要】：隨著經(jīng)濟的快速發(fā)展,汽車產(chǎn)銷量逐年增加,它在給人類生活帶來便利的同時,也造成了環(huán)境的污染和資源的短缺。因此,節(jié)能環(huán)保的電動汽車(electric vehicles,簡稱EVs)成為了汽車行業(yè)發(fā)展的趨勢。其中,四輪驅動(four-wheel drive,簡稱4WD)電動汽車由于高穩(wěn)定性和舒適性等優(yōu)點在汽車工業(yè)領域得到了廣泛關注。作為電動汽車4WD系統(tǒng)的重要組成部分,輪轂電機由于高效率、控制靈活等優(yōu)點,在車用驅動電機領域成為了新興的研究方向之一。作為永磁無刷(permanent magnet brushless,簡稱PMBL)電機種類之一,磁通切換永磁(flux-switching permanent magnet,簡稱FSPM)電機,由于高轉矩密度、高效率、轉子結構簡單等優(yōu)點,在輪轂電機直驅應用場合具有潛在的應用前景。本文將輪轂電機的概念融入到了FSPM電機中,對兩臺具有創(chuàng)新性結構的外轉子輪轂FSPM電機進行了深入研究。主要研究成果包括以下幾個方面:1.提出了兩臺外轉子輪轂FSPM電機的基本結構,包括:“I”型FSPM電機和“V”型FSPM電機,并闡述了該類電機的基本運行原理;2.建立了外轉子FSPM電機設計的一般性方法,特別是推導出了輸出轉矩、定子槽面積和永磁體利用率之間的一般關系,為設計高轉矩密度的外轉子FSPM電機提供了理論依據(jù);3.針對外轉子FSPM電機結構復雜,設計變量較多等特點,提出一種基于電機設計變量“敏感度分層”的多目標優(yōu)化策略,該策略將設計變量分為兩層,并對這兩層設計變量采用不同的優(yōu)化方法,實現(xiàn)了電機的輸出轉矩、轉矩脈動和定位力矩多個設計目標之間的綜合最優(yōu)解;4.在確定兩臺電機最優(yōu)尺寸之后,詳細分析了兩臺電機的基本性能。此外,為了更加系統(tǒng)的評估兩臺電機的結構特點,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方面,全面比較分析了兩個電機的轉矩特性和永磁體利用率。研究揭示出,“V”型外轉子磁通切換永磁電機具有更高的轉矩密度和永磁體利用率。5.加工了兩臺原理樣機,并搭建了實驗平臺,實驗驗證了理論分析和有限元仿真結果的準確性,為該類外轉子FSPM電機實用化研究提供了理論和實驗基礎。
[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.
【學位授予單位】：江蘇大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM351

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