模块化容错永磁游标直线电机的设计与分析

发布时间：2018-03-07 13:58

本文选题：永磁直线电机　切入点：游标电机　出处：《江苏大学》2017年硕士论文　论文类型：学位论文

【摘要】：现阶段,我国已经进入了城市轨道交通建设高速发展的时代,未来城市轨道交通的发展方向之一就是建立绿色环保的城市轨道交通系统。永磁直线电机因其高功率密度和效率受到广泛关注,其中,初级永磁型直线电机由于其绕组和永磁体都放置在初级短动子上,而长定子部分仅由齿槽结构的导磁材料构成,适用于长定子的轨道交通领域。本文以长定子永磁型游标直线电机为研究对象,提出一种模块化容错永磁游标直线电机。建立该电机的有限元仿真模型分析了其电磁特性;并且构建电机热仿真模型,分析了其热特性;设计加工了实验样机,验证了所提出电机性能,为进一步研究该型直线电机夯实了理论基础。本文所研究的主要内容如下:1.分析阐述了磁场调制型电机的结构特点以及工作原理,主要包括磁齿轮电机及永磁游标电机。通过对气隙磁导进行数学解析详细分析了磁场调制的原理,并通过定子永磁型游标电机进行仿真验证。2.针对现有的长定子永磁型游标直线电机的优缺点,提出一种模块化动子结构,实现了电机相邻相之间的磁解耦,降低了相间互感,提升了电机的容错性能。同时,采用新型永磁体阵列结构,降低了永磁体边缘漏磁,增加了气隙磁通密度,提高了永磁体的利用率,进一步提升了电机推力性能。3.分析研究了模块化容错永磁游标直线电机的模块化动子结构和新型永磁体阵列结构。介绍该电机基本结构,并阐述其工作原理。利用有限元仿真软件对电机的电磁特性进行分析,包括电机的永磁磁场特性、反电动势特性、电感特性、定位力特性及推力特性。4.针对本文所提出的电机结构,对其进行结构优化设计,包括不同槽极配比,永磁体结构参数优化设计,动定子结构参数优化设计,最终确定了样机加工的最佳结构,并且与现有电机结构性能进行对比分析。5.基于ANSYS Workbench对电机进行温度场有限元仿真计算,结合电机实际工作特性仿真计算得到电机各个部分的温度分布,并分析研究电机的温度特性。
[Abstract]:At this stage, China has entered the era of rapid development of urban rail transit construction. One of the development directions of urban rail transit in the future is to establish a green urban rail transit system. The permanent magnet linear motor (PMLM) has attracted wide attention because of its high power density and efficiency. Since the winding and permanent magnet of the primary permanent magnet linear motor are placed on the primary short actuator, the long stator part is only composed of the magnetic conductivity material of the tooth slot structure. This paper presents a modularized fault-tolerant permanent magnet Vernier linear motor based on permanent magnet Vernier linear motor with long stator. The finite element simulation model of this motor is established to analyze its electromagnetic characteristics. The thermal simulation model of the motor is constructed, and its thermal characteristics are analyzed, and the experimental prototype is designed and processed to verify the performance of the proposed motor. In order to further study the theoretical foundation of this type of linear motor, the main contents of this paper are as follows: 1. The structure characteristics and working principle of the magnetic field modulated motor are analyzed and expounded. It mainly includes magnetic gear motor and permanent magnet Vernier motor. The principle of magnetic field modulation is analyzed in detail through mathematical analysis of air gap magnetic conductance. According to the advantages and disadvantages of the existing long-stator permanent magnet Vernier linear motor, a modularized moving substructure is proposed, which realizes the magnetic decoupling between the adjacent phases of the motor and reduces the mutual inductance between phases. The fault tolerant performance of the motor is improved. At the same time, the new permanent magnet array structure is adopted, which reduces the flux leakage at the edge of the permanent magnet, increases the air gap flux density, and improves the utilization ratio of the permanent magnet. Furthermore, the thrust performance of the motor is improved. 3. The modularized moving substructure and the new permanent magnet array structure of the modularized fault-tolerant permanent magnet Vernier linear motor are analyzed and studied. The basic structure of the motor is introduced. The electromagnetic characteristics of the motor are analyzed by using the finite element simulation software, including the permanent magnet magnetic field characteristics of the motor, the characteristics of the back EMF, the inductance characteristics, According to the motor structure proposed in this paper, the structure optimization design is carried out, including the optimum design of structure parameters of permanent magnet, the optimum design of structure parameters of permanent magnet, the optimum design of structure parameters of moving stator, the optimum design of structure of permanent magnet, the optimum design of structure of permanent magnet, and the optimum design of structure of motor. Finally, the optimal structure of the prototype machining is determined, and compared with the existing motor structure. 5. The temperature field of the motor is simulated by finite element method based on ANSYS Workbench. The temperature distribution of each part of the motor is calculated by simulation combined with the actual working characteristics of the motor, and the temperature characteristics of the motor are analyzed and studied.
【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】：TM359.4

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