无轴承永磁同步电机结构设计及控制系统研究

发布时间：2018-06-07 20:46

本文选题：无轴承永磁同步电机 + 数学模型　；参考：《江苏大学》2017年硕士论文

【摘要】：无轴承永磁同步电机是一种集成了永磁同步电机和磁轴承两者优点的新型电机。该电机既具有永磁同步电机的结构简单、转矩密度高、功率因数高、效率高等优良特性,同时又具有磁轴承的无摩擦、无磨损、无需润滑、免维护、使用寿命长等优点。随着电力电子技术、微处理器技术以及控制理论的迅速发展,使得无轴承永磁同步电机相关理论和应用技术取得长足进步,在飞轮储能、航空航天、医疗器械、化工工业、精密机械加工等领域具有广泛的应用前景。本文在江苏省重点研发计划项目、江苏省“333工程”以及江苏省“青蓝工程”的支持下,对无轴承永磁同步电机的基本原理及数学模型、本体结构设计与分析、控制系统硬件设计、软件设计以及实验等方面进行了较为深入的研究。本论文的主要内容包括:1.阐述了无轴承电机的研究背景与研究概况,总结了无轴承永磁同步电机的发展趋势和应用前景。同时分析了无轴承永磁同步电机内存在的各种电磁力,阐述了无轴承永磁同步电机的运行原理,应用麦克斯韦张量法推导了径向悬浮力的数学模型,此外还推导了电磁转矩的数学模型。借助Ansoft/Maxwell软件建立有限元仿真模型,对无轴承永磁同步电机的径向悬浮力数学模型进行验证,仿真结果验证了数学模型的正确性。最后设计了基于SVPWM的无轴承永磁同步电机转子磁场定向控制的策略,并给出了具体的控制框图。2.在无轴承永磁同步电机的基础上,对其结构进行改进设计,提出一种新型的外转子Halbach阵列定子无铁心无轴承永磁同步电机,使其能够更好地应用于飞轮储能系统。详细阐述了Halbach阵列永磁转子的结构和性能,同时给出新型无轴承永磁电机的本体结构,详细设计电机本体的参数,对该电机的各种电磁特性进行分析。对多种结构的无轴承永磁同步电机的转子涡流损耗进行有限元分析,分析结果表明外转子Halbach阵列定子无铁心无轴承永磁电机的转子涡流损耗是最小的。仿真结果表明该新型无轴承永磁同步电机非常适合于飞轮储能系统。3.详细设计了无轴承永磁同步电机控制系统的硬件电路,主要包括DSP最小系统板、功率驱动电路以及接口电路等。设计了无轴承永磁同步电机控制系统的软件部分,给出了详细的软件流程图。最后,整合硬件和软件部分构建完整的实验平台,并进行了软硬件部分的测试以及相关的实验研究,实验样机实现了稳定悬浮。
[Abstract]:Bearingless permanent magnet synchronous motor (BMSM) is a new type of motor which integrates the advantages of PMSM and magnetic bearings. The motor not only has the advantages of simple structure, high torque density, high power factor and high efficiency, but also has the advantages of no friction, no wear, no lubrication, no maintenance and long service life of magnetic bearing. With the rapid development of power electronics technology, microprocessor technology and control theory, the theory and application technology of bearingless permanent magnet synchronous motor (PMSM) have made great progress, such as flywheel energy storage, aerospace, medical equipment, chemical industry, etc. Precision machining and other fields have a wide range of application prospects. With the support of Jiangsu key R & D project, Jiangsu "333 Project" and Jiangsu "Green Blue Project", the basic principle and mathematical model of bearingless permanent magnet synchronous motor (PMSM) are analyzed and analyzed in this paper. The hardware design, software design and experiment of the control system are studied deeply. The main contents of this thesis include: 1. The research background and research situation of bearingless permanent magnet synchronous motor (BMSM) are introduced, and the development trend and application prospect of bearingless permanent magnet synchronous motor (PMSM) are summarized. At the same time, all kinds of electromagnetic forces existing in bearingless permanent magnet synchronous motor are analyzed, and the operating principle of bearingless permanent magnet synchronous motor is expounded. The mathematical model of radial suspension force is derived by Maxwell Zhang Liang method. In addition, the mathematical model of electromagnetic torque is derived. The finite element simulation model of bearingless permanent magnet synchronous motor (PMSM) is established by using Ansoft / Maxwell software, and the mathematical model of radial suspension force of bearingless permanent magnet synchronous motor is verified. The simulation results verify the correctness of the mathematical model. Finally, the strategy of rotor flux oriented control for bearingless permanent magnet synchronous motor based on SVPWM is designed, and the control block diagram. 2. Based on the design of bearingless permanent magnet synchronous motor, a new type of outer rotor Halbach array stator core free permanent magnet synchronous motor is proposed, which can be better applied to the flywheel energy storage system. The structure and performance of Halbach array permanent magnet rotor are described in detail. At the same time, the body structure of a new bearingless permanent magnet motor is given, the parameters of the motor body are designed in detail, and various electromagnetic characteristics of the motor are analyzed. The rotor eddy current loss of bearingless permanent magnet synchronous motor (PMSM) with various structures is analyzed by finite element method. The results show that the rotor eddy current loss of outer rotor Halbach array stator bearingless permanent magnet motor is minimum. The simulation results show that the new bearingless permanent magnet synchronous motor is very suitable for flywheel energy storage system. The hardware circuit of the bearingless permanent magnet synchronous motor control system is designed in detail, including DSP minimum system board, power drive circuit and interface circuit. The software part of the control system of bearingless permanent magnet synchronous motor is designed, and the detailed software flow chart is given. Finally, the hardware and software parts are integrated to build a complete experimental platform, and the hardware and software part of the test and related experimental research, the experimental prototype to achieve a stable suspension.
【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】：TM341;TP273

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