磁场调制式同心齿轮的设计研究

发布时间：2018-02-27 16:24

本文关键词： 磁力齿轮磁场调制有限元分析优化设计　出处：《兰州理工大学》2012年硕士论文　论文类型：学位论文

【摘要】：作为一种新型的传动装置，磁力齿轮主要依靠磁场的耦合来传递力矩和转速，输入和输出之间没有机械接触，因此，磁性齿轮具有低噪音、高效率、便于维护、高可靠性以及过载保护等优点。磁力齿轮传动装置的研究，为传动产业提供了一个新的发展方向。但是磁力齿轮转动装置也有其固有的缺点，转矩密度低一直是制约磁力齿轮发展的主要因素。近年来，，由于稀土永磁体材料的出现，磁力齿轮的传递转矩有所提高，但传统径向式磁力齿轮主要是相互靠近的一小部分永磁体磁场参与转矩传递，所以永磁体的利用率低，磁力齿轮转矩密度不高。磁场调制式同心齿轮所有的永磁体磁场都参与转矩的传递，因此转矩密度可以达到100kN.m/m3。在对该种拓扑结构磁力齿轮进行原理分析的基础上，对外转子改进式的磁力齿轮拓扑结构进行研究，对该种拓扑结构的磁力齿轮进行静态磁场分析，分析外转子结构的改变对气隙磁场的影响，并与结构未改进时的磁力齿轮性能进行对比。找出结构改进后对磁力齿轮传动转矩影响较大的参数，主要有调磁环铁心宽度、外转子永磁体宽度和高度等，对这些参数进行计算分析，找出各参数变化对最大静态转矩的影响。按照排列组合的优化方法，制定出磁力齿轮的计算方案，根据内外转子最大静态转矩、损耗和平均转矩密度等指标确定出最优的设计方案。然后按照不均匀气隙设计的方法，改变内转子磁钢结构，来提高外转子气隙中有效谐波含量。另外与兰州电机厂合作，制作了外转子改进型磁场调制式同心齿轮样机，设计了磁力齿轮在空载、负载、突加负载以及过载情况下的动态特性仿真实验，对磁力齿轮进行动态仿真研究。仿真结果验证了磁力齿轮的动态特性，为磁力齿轮的应用研究打下了基础。
[Abstract]:As a new type of transmission device, magnetic gears mainly rely on the coupling of magnetic field to transfer torque and speed, and there is no mechanical contact between input and output. Therefore, magnetic gears have low noise, high efficiency and easy maintenance. The research of magnetic gear transmission provides a new development direction for transmission industry. But the magnetic gear rotation device also has its inherent shortcomings, the low torque density has been the main factor restricting the development of magnetic gear. In recent years, due to the appearance of rare earth permanent magnet, the transmission torque of magnetic gear has been improved. However, the traditional radial magnetic gear is mainly a small part of the magnetic field that is close to each other and the permanent magnet takes part in the torque transfer, so the utilization ratio of the permanent magnet is low. The torque density of magnetic gear is not high. All permanent magnets of magnetic field modulation concentric gear are involved in the transmission of torque, so the torque density can reach 100 kN. m / m ~ (3). Based on the principle analysis of this kind of topological magnetic gear, In this paper, the topology of the magnetic gear with improved outer rotor is studied. The static magnetic field of the magnetic gear with this topology is analyzed, and the influence of the change of the structure of the outer rotor on the air-gap magnetic field is analyzed. And compared with the performance of magnetic gear when the structure is not improved, find out the parameters that have great influence on the torque of magnetic gear transmission after the structure improvement, such as the width of the adjusting magnetic ring iron core, the width and height of the permanent magnet of the outer rotor, etc. These parameters are calculated and analyzed to find out the influence of each parameter change on the maximum static torque. According to the optimization method of arrangement and combination, the calculation scheme of magnetic gear is worked out, according to the maximum static torque of inner and outer rotor, According to the method of non-uniform air gap design, the magnetic steel structure of the inner rotor is changed to increase the effective harmonic content in the air gap of the outer rotor. In addition, the effective harmonic content in the air gap of the outer rotor is increased by using the method of non-uniform air gap design. A prototype of the modified magnetic field modulated concentric gear with external rotor is made, and the simulation experiment of the dynamic characteristics of magnetic gear under the condition of no load, load, sudden loading and overload is designed. The dynamic simulation of magnetic gear is carried out. The simulation results verify the dynamic characteristics of magnetic gear and lay a foundation for the application of magnetic gear.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.41

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