磁悬浮感应电机结构设计与动态性能分析

发布时间：2018-09-09 19:00

【摘要】：结合了电机旋转与轴承支撑功能的磁悬浮电机是国际高速化电机研发课题新的方向。其在我国也有着很广阔的应用前景,几乎遍布制药产业、化工产品、半导体产品、食品产业,制造业等各个领域。积极开展磁悬浮电机的研发和实践应用也对交通能源、航空航天、军工、农工业生产和日常生活的各个范畴的发展都有着积极的现实意义和研究价值。感应型磁悬浮电机是一种典型的机电一体化产品,其研究领域涉及到电机学、空气动力学、流体力学、电磁学和机电能量转换等多学科的知识,这毫无疑问是极富挑战性的研究课题。本文基于电磁轴承悬浮技术与传统感应电机原理,构建了一种新型磁悬浮感应电机。这种磁悬浮感应有转速快、结构简单、体积小、较高的稳定性和控制精度等优点。另外,本文突出的一点是对磁悬浮感应电机的气隙压力分布做了流体场的仿真研究。因为到目前为止,对这方面的研究还局限于计算分析。本文主要分为以下几个部分： 1.介绍了磁悬浮电机的国内外发展、研究现状、应用前景与发展趋势,提出了磁悬浮感应电机的研究方向及意义； 2.首先提出了磁悬浮感应电机的理论并对其加以论述阐明。其次以定、转子气隙分布数学模型为联系对气隙磁感应强度、电磁转矩、电磁悬浮力的数学模型进行推导与建立。最后基于电感原理建立了磁链方程； 3.完成磁悬浮感应电机的整体和相关主要结构设计,并对电机各结构参数和性能进行核算； 4.利用ANSOFT仿真软件对某时刻转子处于中心位置和转子偏心情况下进行电磁场仿真。同时用MATLAB拟合不同偏心下的仿真数据,得到了悬浮力、转矩、气隙承载能力与偏心位移的关系。 5.基于气体动压轴承理论,对不同偏心率和转速下气隙压力分布情况做了Fluent仿真,并给定一微小扰动量仿真气隙压力分布情况。对仿真数据进行分析,得出了气隙压力与偏心率、转速的关系同时计算出了气隙在流体场作用下的承载能力。最后,结合气隙磁场刚度和流体场气隙刚度初步拟合总的气隙承载能力。
[Abstract]:Maglev motor, which combines the function of motor rotation and bearing support, is a new direction in the research and development of high speed motor in the world. It also has a broad application prospect in China, almost all over the pharmaceutical industry, chemical products, semiconductor products, food industry, manufacturing and other fields. Active research and development and practical application of maglev motor also have positive practical significance and research value for the development of transportation energy, aerospace, military industry, agro-industrial production and daily life. Induction maglev motor is a typical mechatronics product. Its research field involves many subjects, such as electromechanics, aerodynamics, hydrodynamics, electromagnetism, electromechanical energy conversion and so on. This is undoubtedly a very challenging research topic. Based on the theory of electromagnetic bearing suspension and traditional induction motor, a new type of magnetic suspension induction motor is constructed in this paper. The magnetic levitation induction has the advantages of fast rotating speed, simple structure, small volume, high stability and control precision. In addition, the air gap pressure distribution of maglev induction motor is simulated. So far, the research has been limited to computational analysis. This paper is divided into the following parts: 1. This paper introduces the development of maglev motor at home and abroad, research status, application prospect and development trend, and puts forward the research direction and significance of maglev induction motor. 2. Firstly, the theory of magnetic levitation induction motor is put forward and expounded. Secondly, the mathematical models of magnetic induction intensity, electromagnetic torque and electric magnetic suspended buoyancy of air gap are deduced and established with the mathematical model of air gap distribution of stator and rotor. Finally, based on the inductance principle, the flux chain equation is established. Complete the whole and related main structure design of maglev induction motor, and calculate the structure parameters and performance of the motor; 4. ANSOFT software is used to simulate the electromagnetic field of the rotor in the center position and the rotor eccentricity at a certain time. At the same time, the simulation data of different eccentricity are fitted by MATLAB, and the relationship between suspension force, torque, air gap bearing capacity and eccentric displacement is obtained. Based on the theory of gas dynamic bearing, the air gap pressure distribution under different eccentricity and rotation speed is simulated by Fluent, and a small disturbance is given to simulate the air gap pressure distribution. By analyzing the simulation data, the relationship between air gap pressure, eccentricity and rotational speed is obtained, and the bearing capacity of air gap under the action of fluid field is also calculated. Finally, the total air gap bearing capacity is preliminarily fitted by combining the air gap magnetic field stiffness with the air gap stiffness of the fluid field.
【学位授予单位】：扬州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM346

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