高转矩密度定转子双永磁游标电机的设计与分析

发布时间：2018-01-20 13:38

本文关键词： 永磁电机游标电机高转矩密度定转子双永磁混合磁材料低速大转矩　出处：《江苏大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着直驱技术在农业装备驱动领域受到越来越多的关注,具有低速大转矩能力的高性能电机成为国内外学者关注的焦点。传统的永磁游标电机分为定子型和转子型永磁游标电机。定子型永磁游标电机具有永磁体利用率不高的缺点,转子型永磁游标电机具有发热导致永磁体发生不可逆退磁的缺点。为改善原有永磁游标电机的问题,本文提出三相高转矩密度混合磁材料定转子双永磁游标电机,该电机在定子以及转子上均表嵌有永磁体,且采用混合磁材料,不仅充分利用电机内部的空间结构,而且提升永磁体利用率以及降低永磁体发生不可逆退磁的风险。本文的研究内容概括为以下几点:1.分析阐述磁场调制型磁齿轮的结构特点以及工作原理,并对永磁游标电机工作原理以及结构特点作出叙述。通过对气隙磁导进行数学解析分析磁场调制原理,最后通过对永磁游标电机模型的仿真结果对磁场调制原理进行说明。2.对电机基本模型的重要参数选择做出阐述,包括电机绕组类型、槽数选择、绕组极数以及调制齿数的确定。3.提出新型高转矩密度永磁游标电机。在不影响调制效应的基础之上,该电机在定子以及转子部分均表嵌有永磁体,定子以及转子部分的虚齿均参与调制效应。定子和转子部分的永磁体产生的磁场均经过调制齿调制。表嵌入定子部分的永磁体利用Halbach阵列的聚磁特性,该永磁体阵列能够减少漏磁以提高永磁体利用率,并且提出在Halbach聚磁阵列的底部引入磁障。4.基于基本模型的研究,提出外定子高转矩密度永磁游标电机,电机采用单层分数槽集中绕组。对电机优化过程作出详细介绍,对永磁体充磁方向的确定、混合磁材料组合类型、永磁体厚度和槽口宽度等进行优化说明。5.利用软件Maxwell和Simplorer对所设计样机模型进行联合仿真分析,联合仿真分析相比于Maxwell的仿真结果更贴合实际,利用联合仿真的结果对电机性能做出初步验证。6.完成设计方案,制造样机。搭建数字化实验平台,利用实验室现有设备对电机主要性能进行测试,通过实验结果验证理论仿真结果。
[Abstract]:With the development of direct-drive technology, more and more attention has been paid in the field of agricultural equipment driving. The high performance motor with low speed and large torque capability has become the focus of scholars at home and abroad. The traditional permanent magnet Vernier motor is divided into stator type and rotor type permanent magnet Vernier motor. Stator permanent magnet Vernier Motor has permanent magnet utilization ratio. Not too high. Rotor permanent magnet Vernier motor has the disadvantage of irreversible demagnetization caused by heating. In this paper, a three-phase high torque density hybrid magnetic material is proposed to predict the stator and rotor double permanent magnet Vernier motor. Permanent magnet is embedded in the stator and rotor of the motor, and mixed magnetic material is used. Not only make full use of the internal space structure of the motor. And improve the utilization ratio of permanent magnets and reduce the risk of irreversible demagnetization of permanent magnets. The research contents of this paper are summarized as follows: 1.The structure characteristics and working principle of magnetic gears with magnetic field modulation are analyzed. The working principle and structure characteristics of permanent magnet Vernier motor are described. The principle of magnetic field modulation is analyzed by mathematical analysis of air-gap magnetic conductance. Finally, through the simulation results of permanent magnet Vernier motor model, the principle of magnetic field modulation is explained. 2. The selection of important parameters of the basic model of the motor, including the type of motor winding, the selection of slot number. A novel high torque density permanent magnet Vernier motor is proposed. On the basis of no influence on modulation effect, permanent magnet is embedded in the stator and rotor parts of the motor. The magnetic fields generated by the permanent magnets of the stator and rotor are modulated by the modulated teeth. The permanent magnets embedded in the stator part use the Halbach array's special magnetic properties. Sex. The permanent magnet array can reduce magnetic flux leakage to improve the utilization rate of permanent magnet, and proposed the introduction of magnetic barrier at the bottom of the Halbach magnetic array. 4. Research based on the basic model. This paper presents a high torque density permanent magnet Vernier motor with a single-layer fractional slot winding. The optimization process of the motor is introduced in detail. The direction of magnetization of permanent magnet is determined and the combination type of mixed magnetic material is given. The thickness of permanent magnet and the width of slot are optimized. 5. The software Maxwell and Simplorer are used to simulate the prototype model. Compared with the simulation results of Maxwell, the joint simulation analysis is more practical, using the results of the joint simulation to make a preliminary verification of the performance of the motor .6. to complete the design. A digital experimental platform was built and the main performance of the motor was tested by using the existing equipment in the laboratory. The theoretical simulation results were verified by the experimental results.
【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】：S220.2

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