径向磁场双转子永磁电机的设计及研究

发布时间：2018-04-05 07:12

本文选题：双转子电机　切入点：磁场解耦　出处：《长春理工大学》2014年硕士论文

【摘要】：双转子电机是一种新型特殊结构的电机,其结构紧凑,转矩密度和效率都高于传统电机。径向磁场双转子永磁同步电动机是双转子电机中的其中一种,因其结构与传统电机不同,故设计方法和研究内容也与传统电机存在着差异。为了提高电机的性能,改善电机结构,本文主要进行了以下几方面的研究。首先对径向磁场双转子永磁同步电机的特殊结构和运行原理进行了分析。针对不同的永磁体充磁方向,提出了不同的磁路结构模型,为后续磁场解耦的研究打下基础。其次,根据传统电机的设计原则和步骤,建立了双转子电机的结构模型。利用等效磁路法,分别对充磁方向相同和充磁方向相反时的磁路结构进行了分析,推导出内外电机气隙磁通密度的计算公式,提出了磁场解耦的必要性。再次,运用有限元仿真分析软件Ansys的电磁分析模块Ansoft Maxwell对电机进行了仿真分析。在电机空载情况下,通过给内外电机永磁体赋予不同的充磁方向,对内外电机气隙的磁通密度进行了计算,重点对减小内外电机磁场之间的耦合方法作了深入的分析,得出了永磁体充磁方向相反时减少内外电机磁场相互耦合的条件。最后,分析了当电机带有负载时,电机绕组电流产生的磁场与电机在空载情况下产生的主磁场之间的关系。根据通入内外电机电流大小的不同,对交轴电枢反应、直轴电枢反应在电机中的不同存在形式对电机磁场的影响进行了理论分析,提出了不同电枢反应条件下避免定子铁心发生磁场饱和的方法。
[Abstract]:The double rotor motor is a new type of motor with special structure, compact structure, high torque density and efficiency are higher than that of traditional motor. The radial magnetic field of dual rotor permanent magnet synchronous motor is a double rotor motor in one, because of its structure and the traditional motor is different, therefore the design method and the research content and the traditional motor exists the difference. In order to improve the motor performance, improve the structure of the motor, this paper mainly research on the following aspects. Firstly, the special structure and operation principle of the radial magnetic field of dual rotor permanent magnet synchronous motor is analyzed. According to the permanent magnet magnetization direction different, put forward the magnetic structure of different models, and lay the foundation for the study the magnetic field decoupling. Secondly, according to the design principles and steps of traditional motor, establish the structure model of double rotor motor. Using the equivalent circuit method, respectively, on the same magnetizing direction and magnetization direction Anti magnetic structure is analyzed, the calculation formula of the motor and push the air gap magnetic flux density, magnetic field and puts forward the necessity of decoupling. Thirdly, using electromagnetic finite element simulation analysis software Ansys analysis module of Ansoft Maxwell simulation analysis of the motor. The motor no-load condition, through to the permanent magnet motor given the different magnetizing direction, the magnetic flux density in the air gap and the motor are calculated, the study focuses on the analysis of the method reduces the coupling between internal and external magnetic field, the permanent magnet in the opposite direction when the magnetic field inside and outside conditions reduce motor coupling. Finally, analyzed when the motor with load, the relationship between the main magnetic field generated by the motor winding current and the motor under no-load condition. According to the size and pass into the motor current, the q-axis armature reaction, direct axis armature The influence of different forms of reaction on the magnetic field of motor is theoretically analyzed, and the method of avoiding magnetic saturation of stator core under different armature reaction conditions is put forward.

【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM351

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