双定子多自由度永磁同步电机研究

发布时间：2018-03-04 13:49

本文选题：多自由度　切入点：永磁同步电机　出处：《哈尔滨工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着科技的不断发展,机电系统日趋复杂化,简单的单自由度电机已很难满足需求,多自由度电机越来越受到工业界的欢迎。本文提出了一种新型多自由度电机方案,该电机集成旋转电机、径向磁轴承和直线电机于一体,可以有效实现六自由度控制,提高电机的弱磁扩速能力,拓宽恒功率范围。本文将从以下几个方面对双定子多自由度永磁同步电机展开研究:首先,在总结常见的几种多自由度电机结构及其耦合问题的基础上,提出了双定子多自由度永磁同步电机方案。之后针对本研究所提出的电机,从结构及功能出发,对其总体配置方案及各部分结构特点进行分析。主要包括外部旋转电机定转子结构及配置方式,内部直线电机初次级结构及配置方式,悬浮单元的结构及其径向力的产生机理和影响因素分析。其次,双定子多自由度永磁同步电机气隙磁场分布不同于传统电机,本文采用解析法分别对外部旋转电机及内部直线电机进行数学建模,对他们产生的旋转磁场及行波磁场分布进行解析计算,在此基础上,研究不同充磁方式时内外气隙磁场的分布规律,并利用有限元法进行仿真验证。然后,针对双定子多自由度电机中的耦合问题,对旋转磁场对内部气隙和行波磁场对外部气隙的耦合特性进行研究。采用解析法对内外永磁体不同充磁方式,极对数及转子材料对磁场耦合特性的影响进行定量研究,并利用有限元法进行仿真验证。在此基础上,提出双定子多自由度永磁同步电机的抗耦设计原则。最后研究双定子多自由度永磁同步电机的运行性能。在外部旋转电机方面,对弱磁扩速时外部旋转电机的空载反电势和转矩特性进行理论研究和仿真验证,并对该电机的弱磁扩速方式进行研究;在内部直线电机方面,在考虑磁场耦合的前提下,对其正位力,空载反电势和轴向电磁力进行解析研究和仿真验证,这些研究对本研究所提出电机的运行特性具有重要意义。
[Abstract]:With the development of science and technology, the electromechanical system is becoming more and more complicated, the simple single-degree-of-freedom motor is difficult to meet the demand, and the multi-degree-of-freedom motor is more and more popular in the industry. This paper presents a new type of multi-degree-of-freedom motor scheme. The motor integrates rotating motor, radial magnetic bearing and linear motor, which can effectively realize the control of six degrees of freedom and improve the speed expansion ability of the motor. In this paper, we will study the double stator multi-degree-of-freedom permanent magnet synchronous motor from the following aspects: firstly, on the basis of summing up the common structures of multi-degree-of-freedom motors and their coupling problems, The scheme of double stator multi-degree-of-freedom permanent magnet synchronous motor (PMSM) is proposed. The overall configuration scheme and structural characteristics of each part are analyzed, including the structure and configuration of stator and rotor of external rotating motor, the primary structure and configuration mode of internal linear motor. The structure of suspension unit, the mechanism of radial force and the influencing factors are analyzed. Secondly, the air-gap magnetic field distribution of double-stator multi-degree-of-freedom permanent magnet synchronous motor is different from that of traditional motor. In this paper, the external rotating motor and the internal linear motor are modeled by the analytical method, and the distribution of the rotating magnetic field and the traveling wave magnetic field generated by them are calculated analytically. The distribution law of internal and external air gap magnetic field in different magnetizing modes is studied and verified by finite element method. Then, the coupling problem in the double stator multi-degree-of-freedom motor is discussed. The coupling characteristics of rotating magnetic field to internal air gap and traveling wave magnetic field to external air gap are studied. Based on the finite element method, the anti-coupling design principle of double-stator multi-degree-of-freedom permanent magnet synchronous motor is proposed. Finally, the performance of double-stator multi-degree-of-freedom permanent magnet synchronous motor is studied. The characteristics of no-load reverse EMF and torque of external rotating motor with weak magnetic field expansion are theoretically studied and simulated, and the weak magnetic expansion mode of the motor is studied. In the case of internal linear motor, the coupling of magnetic field is considered. The analysis and simulation of its positive force, no-load reverse EMF and axial electromagnetic force are carried out. These studies are of great significance to the research on the operating characteristics of the motor.
【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】：2015
【分类号】：TM341

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