轴向磁通永磁同步电机轻量化设计及其相关技术研究

发布时间：2018-06-08 04:32

本文选题：轴向磁场 + 轻量化设计　；参考：《哈尔滨工业大学》2017年硕士论文

【摘要】：轴向磁通永磁同步电机(axial flux permanent magnet synchronous machine,AFPMSM)相对其他结构电机具有较高的功率密度和转矩密度,又由于其扁平的结构有着良好地空间适应性。因此AFPMSM在交通、风电以及航天等领域有着广阔的应用前景。在电机结构设计时,进一步减少AFPMSM的重量,可以有效提升其运行特性。本文便以AFPMSM作为研究对象,对电机结构进行轻量化设计,以及对轻量化后电机可能存在的相关问题进行研究。主要研究内容如下:首先,从单定子单转子轴向磁通永磁同步电机(single-stator single-rotor AFPMSM,SSSR AFPMSM)入手。在性能指标给定的前提下,给出传统电机结构的设计方法,并结合有限元仿真研究轭部结构的优化方法,使其转矩密度达到最高。同时对AFPMSM轭部磁路进行研究,分析轭部材料的利用率,在此基础上探究电机的轻量化结构设计方法,并给出理论验证。其次,结合提出的轻量化设计方法,对SSSR AFPMSM进行轻量化设计,并对优化前后电机输出性能进行对比。同时对单定子双转子轴向磁通永磁同步电机(single-stator double-rotor AFPMSM,SSDR AFPMSM)和双定子单转子轴向磁通永磁同步电机(double-stator single-rotor AFPMSM,DSSR AFPMSM)的轻量化结构设计进行探究,给出优化前后的性能对比。并横向比较不同结构AFPMSM的输出性能,分析其规律。再次,针对轴向磁通永磁同步电机在装配过程中容易产生定转子静偏心的结构属性,从理论层面对AFPMSM静偏心进行描述和研究。分析其静偏心特性对电机磁场求解边界条件的影响。并基于磁场解析对标量磁位进行运算,求解静偏心磁场的解析表达式。并将解析结果与三维有限元方法进行对比验证。同时对多盘电机以及考虑到定子开槽时的AFPMSM的静偏心磁场进行研究。最后,对SSDR AFPMSM和DSSR AFPMSM结构电机机壳、转轴和端盖等结构的机械强度进行研究。给出不同类型轴向磁通永磁同步电机各部件之间的装配方法,然后对电机各机械部件在负载工况下的实际受力情况进行描述,并建立应力模型对其机械强度进行计算,综合其形状和材料属性探究出满足电机负载工况下机械强度的最小尺寸值,实现机壳、转轴和端盖等机械结构的轻量化设计。
[Abstract]:Axial flux permanent magnet synchronous motor (PMSM) has higher power density and torque density than other motor structures, and has good spatial adaptability due to its flat structure. Therefore, AFPMSM has a broad application prospect in the fields of transportation, wind power and spaceflight. In the design of motor structure, the weight of AFPMSM can be further reduced, which can effectively improve the performance of AFPMSM. In this paper, AFPMSM is taken as the research object, the structure of the motor is designed to be lightweight, and the related problems of the motor after lightweight are studied. The main research contents are as follows: firstly, single-stator single-rotor AFPMSMM-SSSR AFPMSM (single-stator single-rotor axial flux permanent magnet synchronous motor AFPMSM) are introduced. On the premise of the performance index, the design method of the traditional motor structure is given, and the optimization method of the yoke structure is studied by the finite element simulation, which makes the torque density reach the highest. At the same time, the magnetic circuit of AFPMSM yoke is studied, and the utilization ratio of yoke material is analyzed. On this basis, the lightweight structure design method of motor is explored, and the theoretical verification is given. Secondly, combined with the proposed lightweight design method, the SSSR AFPMSM is designed to be lightweight, and the output performance of the motor before and after optimization is compared. At the same time, the lightweight structure design of single-stator double-rotor AFPMSM SSDR AFPMSM and double-stator single-rotor axial flux permanent magnet synchronous motor double-stator single-rotor AFPMSM- DSSR AFPMSM are studied, and the performance comparison before and after optimization is given. The output performance of AFPMSM with different structures is compared and its rule is analyzed. Thirdly, the static eccentricity of AFPMSM is described and studied theoretically in view of the structure property of stator and rotor static eccentricity that is easy to occur in the assembly process of axial flux permanent magnet synchronous motor (PMSM). The influence of static eccentricity on the boundary condition of the motor magnetic field is analyzed. Based on the magnetic field analysis, the scalar magnetic potential is calculated, and the analytical expression of the static eccentric magnetic field is solved. The analytical results are compared with the three-dimensional finite element method. At the same time, the static eccentric magnetic field of multi-disk motor and AFPMSM considering stator slot are studied. Finally, the mechanical strength of SSDR AFPMSM and DSSR AFPMSM are studied. The assembly methods of different types of axial flux permanent magnet synchronous motor (PMSM) components are given, and then the actual force of the mechanical components under the load condition is described, and the mechanical strength is calculated by establishing the stress model. By synthesizing its shape and material properties, the minimum size value of mechanical strength is found to meet the load condition of motor, and the lightweight design of mechanical structures such as housing, rotating shaft and end cover is realized.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341

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