外转子磁通切换永磁电机的设计与研究

发布时间：2018-03-21 18:06

本文选题：磁通切换永磁电机　切入点：外转子　出处：《江苏大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着经济的快速发展,汽车产销量逐年增加,它在给人类生活带来便利的同时,也造成了环境的污染和资源的短缺。因此,节能环保的电动汽车(electric vehicles,简称EVs)成为了汽车行业发展的趋势。其中,四轮驱动(four-wheel drive,简称4WD)电动汽车由于高稳定性和舒适性等优点在汽车工业领域得到了广泛关注。作为电动汽车4WD系统的重要组成部分,轮毂电机由于高效率、控制灵活等优点,在车用驱动电机领域成为了新兴的研究方向之一。作为永磁无刷(permanent magnet brushless,简称PMBL)电机种类之一,磁通切换永磁(flux-switching permanent magnet,简称FSPM)电机,由于高转矩密度、高效率、转子结构简单等优点,在轮毂电机直驱应用场合具有潜在的应用前景。本文将轮毂电机的概念融入到了FSPM电机中,对两台具有创新性结构的外转子轮毂FSPM电机进行了深入研究。主要研究成果包括以下几个方面:1.提出了两台外转子轮毂FSPM电机的基本结构,包括:“I”型FSPM电机和“V”型FSPM电机,并阐述了该类电机的基本运行原理;2.建立了外转子FSPM电机设计的一般性方法,特别是推导出了输出转矩、定子槽面积和永磁体利用率之间的一般关系,为设计高转矩密度的外转子FSPM电机提供了理论依据;3.针对外转子FSPM电机结构复杂,设计变量较多等特点,提出一种基于电机设计变量“敏感度分层”的多目标优化策略,该策略将设计变量分为两层,并对这两层设计变量采用不同的优化方法,实现了电机的输出转矩、转矩脉动和定位力矩多个设计目标之间的综合最优解;4.在确定两台电机最优尺寸之后,详细分析了两台电机的基本性能。此外,为了更加系统的评估两台电机的结构特点,本文从相同电密与相同槽满率、相同铜耗以及相同相电流三个方面,全面比较分析了两个电机的转矩特性和永磁体利用率。研究揭示出,“V”型外转子磁通切换永磁电机具有更高的转矩密度和永磁体利用率。5.加工了两台原理样机,并搭建了实验平台,实验验证了理论分析和有限元仿真结果的准确性,为该类外转子FSPM电机实用化研究提供了理论和实验基础。
[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.
【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM351

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