电动汽车用双层永磁体内置式永磁同步电机优化设计与试验研究

发布时间：2018-03-12 19:31

本文选题：电动汽车　切入点：双层永磁体　出处：《江西理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着环境污染与能源危机逐渐凸显,环保、零污染的电动汽车受到越来越多的人青睐,而实现高功率密度驱动电机是制约电动汽车行业发展的一大难题。双层永磁体内置式永磁同步电机(Interior Permanent Magnet Synchronous Machine with Double-layer PMs,IPMSM-DPM)是一类利用转子内置双层永磁体而改善功率密度的新型电机。本文以电动汽车用IPMSM-DPM为研究目标,在掌握电机运行机理和转子结构特征的基础上,采用有限元方法对电机进行了优化设计,校验了最高转速下的转子机械强度,并对额定负载下的电机各部件温度场分布进行了数值计算,加工制作了一台试验样机,展开了样机试验以验证理论分析的有效性。本文研究所取得成果对电动汽车用驱动电机的发展具有较为重要的理论依据和工程应用价值。本文主要研究工作及成果如下:1.电机结构优化设计。详细分析了内置式永磁同步电机结构特点;采用有限元软件Ansoft Maxwell对转子结构进行优化,借助Toolkit对采用不同定子槽数的电机全工作区域下的铁耗、铜耗、功率因数、转矩脉动及效率进行了数值计算;并与单层永磁体转子结构下的电机电感、输出转矩、损耗及效率进行了对比分析,获得了电机优化设计方案。2.转子应力校验。采用Solid Works建立了IPMSM-DPM转子模型,导入ANSYSWorkbench中定义材料属性,计算了最高转速下转子机械应力分布,验证了转子设计的合理性。3.磁热耦合模型数值计算。采用Ansoft Maxwell软件,对额定负载下IPMSM-DPM电枢绕组损耗、铁耗进行计算,并以此为热源,借助ANSYS Workbench仿真平台,建立了电机三维磁热耦合仿真模型,深入分析了电机温度场分布规律。4.样机制作与试验研究。确定电机基本参数,绘制加工图纸,制作了一台试验样机;搭建了样机测试平台,测试了样机电阻、电感及感应电动势基本特性,验证了电机设计的合理性和理论分析的有效性。
[Abstract]:With the environmental pollution and energy crisis gradually prominent, environmental protection, zero pollution electric vehicles are more and more popular. The realization of high power density drive motor is a difficult problem that restricts the development of electric vehicle industry. Interior Permanent Magnet Synchronous Machine with Double-layer PMM-DPMM is a kind of IPMSM-DPMM, which uses the double layer permanent magnet built in the rotor to improve the power. This paper focuses on IPMSM-DPM for electric vehicles. On the basis of mastering the running mechanism of the motor and the characteristics of the rotor structure, the optimum design of the motor is carried out by using the finite element method, and the rotor mechanical strength at the highest rotational speed is checked. The temperature field distribution of each part of the motor under rated load is numerically calculated, and a test prototype is made. Prototype test was carried out to verify the validity of theoretical analysis. The results obtained in this paper have important theoretical basis and engineering application value for the development of electric vehicle drive motor. The results are as follows: 1. Optimum design of motor structure. Structure characteristics of built-in permanent magnet synchronous motor are analyzed in detail. The rotor structure is optimized by the finite element software Ansoft Maxwell. The iron loss, copper consumption, power factor, torque ripple and efficiency of the motor with different stator slots are numerically calculated by Toolkit. Compared with the single layer permanent magnet rotor structure, the motor inductance, output torque, loss and efficiency are compared and analyzed. The optimum design scheme of motor .2.The rotor stress check is obtained. The IPMSM-DPM rotor model is established by using Solid Works. The material properties are defined in ANSYSWorkbench, and the mechanical stress distribution of rotor at the highest speed is calculated, which verifies the rationality of rotor design .3. numerical calculation of magnetocaloric coupling model. The loss of IPMSM-DPM armature winding under rated load is calculated by Ansoft Maxwell software. Based on the calculation of iron consumption, and with the aid of ANSYS Workbench simulation platform, the three-dimensional magneto-thermal coupling simulation model of the motor is established, and the temperature field distribution law of the motor is deeply analyzed .4.The prototype is made and the experimental research is carried out, and the basic parameters of the motor are determined. A prototype was built, and the basic characteristics of resistance, inductance and induction electromotive force were tested. The rationality of motor design and the validity of theoretical analysis were verified.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341;U469.72

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