电动汽车用对转双转子电机的设计与开发

发布时间：2018-07-02 19:37

本文选题：对转双转子电机 + 电磁场分析　；参考：《华南理工大学》2014年硕士论文

【摘要】：驱动电机是电动汽车的心脏，其设计合理与否直接影响电动汽车的性能。因此，驱动电机技术一直被视为电动汽车的关键技术之一，受到世界各国研究者的重视。对转双转子电机是一种新型的电机，它具有两个相互反向旋转的机械轴，可以同时从两轴输出动力，因而理论上较传统电机具备更高的功率密度，适合用作电动汽车驱动电机。此外，只要经过合理的减速（变向），对转双转子电机就可以直接驱动车轮，这样可以省去传统驱动桥中的机械差速器，使驱动桥结构更简单。本文根据一套具有自主知识产权的油-电混合动力汽车的多桥驱动系统方案，进行了行星齿轮减速对转双转子电机的设计及稳定性研究工作。论文的主要工作如下：（1）根据课题项目给定的技术指标，确定双转子电机和行星减速器的基本参数，并完成行星减速器的配齿设计。接着进行双转子电机和行星减速器的初步结构设计。（2）在Ansoft/Maxwell软件环境下建立对转双转子电机的二维电磁场有限元分析模型，并分别进行电机空载、满载、过载工况以及齿槽转矩分析，，验证电机的各项电磁性能。仿真结果表明该双转子电机的设计比较合理，能满足设计技术指标。（3）利用Ansoft/Maxwell软件分析了内转子铁芯设计域外边界尺寸对气隙平均磁密、磁桥处平均磁密、平均电磁转矩和内转子铁芯涡流损耗等关键电磁性能参数的影响，确定了内转子铁芯结构优化的边界尺寸。运用Hyperworks/Optistruct软件分别对内转子铁芯以及减速器关键零件进行应力约束下的拓扑优化。优化后，内转子铁芯减重20.68%，减速器零件平均减重30%以上。最后根据结构优化结果修改图纸，进行功能样机试制。（4）根据小信号法，分别进行对转双转子电机在开环和闭环（包括在恒转矩区及弱磁扩速区下）的稳定性分析。结果显示对转双转子电机在开环状态下存在不稳定的工作点，然而采取一定的闭环控制方案可以使电机始终保持稳定。利用Matlab/Simulink软件进行双转子电机的开环及闭环仿真，验证了分析结果。计算系统矩阵特征值的灵敏度，阐述了在不同控制模式下系统参数对稳定性的影响。（5）对功能样机进行台架试验，测试系统空载特性与部分负载特性。
[Abstract]:Drive motor is the heart of electric vehicle, its design is reasonable or not directly affect the performance of electric vehicle. Therefore, driving motor technology has been regarded as one of the key technologies of electric vehicles, and has been paid attention to by researchers all over the world. Dual rotor motor is a new type of motor. It has two opposite rotating mechanical shafts, which can output power from two axes at the same time. Therefore, it has a higher power density than traditional motor, so it is suitable for electric vehicle driving motor. In addition, the dual rotor motor can drive the wheel directly after reasonable deceleration, which can save the mechanical differential in the traditional drive axle and make the structure of the drive axle simpler. According to the scheme of multi-bridge drive system of oil-electric hybrid electric vehicle with independent intellectual property rights, the design and stability research of the planetary gear deceleration double-rotor motor is carried out in this paper. The main work of this paper is as follows: (1) the basic parameters of the double rotor motor and the planetary reducer are determined according to the technical specifications given in the project, and the gear matching design of the planetary reducer is completed. Secondly, the structure design of double rotor motor and planetary reducer is carried out. (2) the finite element analysis model of two dimensional electromagnetic field is established in Ansoft / Maxwell software. The electromagnetism performance of the motor is verified by the analysis of the overload condition and the torque of the tooth slot. The simulation results show that the design of the double-rotor motor is reasonable and can meet the design technical requirements. (3) using Ansoft / Maxwell software, the average magnetic density to the air gap and the average magnetic density at the magnetic bridge are analyzed by using Ansoft / Maxwell software. The influence of the key electromagnetic performance parameters such as the average electromagnetic torque and the eddy current loss of the inner rotor iron core is obtained and the boundary size of the inner rotor core structure optimization is determined. The topology optimization of the inner rotor core and the key parts of the reducer is carried out by using Hyperworks / Optistruct software under stress constraints. After optimization, the inner rotor core weight loss is 20.68%, the average weight loss of reducer parts is more than 30%. Finally, the drawings are modified according to the structural optimization results. (4) according to the small signal method, the stability of the rotor motor in open loop and closed loop (including constant torque region and weak magnetic expansion region) is analyzed respectively. The results show that there are unstable operating points in the open loop state of the dual rotor motor. However, a certain closed loop control scheme can keep the motor stable all the time. The open-loop and closed-loop simulation of double-rotor motor is carried out by Matlab / Simulink software, and the results are verified. The sensitivity of the eigenvalue of the system matrix is calculated, and the influence of system parameters on stability under different control modes is discussed. (5) bench tests are carried out on the functional prototype to test the no-load and partial load characteristics of the system.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U469.72;U463.6

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