直线永磁同步电机定位力的优化设计--原创.doc

直线永磁同步电机定位力的优化设计

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摘要 与旋转电机类似，根据工作原理的差别，直线电机也存在着许多类型，在这其中应用比较多的有直线同步电机与直线感应电机两大类。本课题主要围绕直线永磁同步电机的定位力优化进行研究。定位力作为直线永磁同步电机不可避免的特性之一，严重影响了整个直线驱动系统的性能。因此，本文根据直线永磁同步电机的运行原理，对直线永磁同步电机定位力的产生机理、优化设计方法进行了研究，主要包括齿极配比、初级齿形状、永磁体形状以及边齿位置四个方面，力图寻找有效降低直线永磁同步电机定位力的方法。
定位力作为推力波动的重要组成部分，在创建以齿槽效应和端部效应为参数的磁路分析模型的基础上，利用有限元的方法对直线永磁同步电机(PMLSM)进行了二维建模，从而分析了影响定位力大小的关键因素，得出合适的初级齿形状、边齿位置、齿极配比、永磁体形状来有效减小定位力。通过有限元仿真，总结了直线永磁同步电机定位力的变化规律，证明了磁路分析模型的正确性。
本文考虑了不同参数下直线永磁同步电机的设计方案，以优化定位力，详细的内容如下：
首先，阐述了直线永磁同步电机的研究背景，国内外研究状况，然后介绍了直线电机的发展趋势，直线永磁同步电机的应用前景以及定位力分析与优化方法的现状。
其次，介绍了直线永磁同步电机的定义、工作原理，对影响定位力主要因素进行阐述。
然后，介绍有限元分析软件JMAG，建立了直线永磁同步电机的有限元仿真模型。
最后，基于上述有限元模型，根据直线永磁同步电机的特点，针对定位力这一参数进行了优化设计，分析了几种典型定位力优化方法的效果，并最终得到了优化方案。
关键词：直线永磁同步电机 定位力 边端效应 齿槽效应 有限元分析


Detent Force Optimization for Permanent Magnet Linear Synchronous Motor
Abstract Similar with the rotary motor, according to the different working principle of linear motor, there are many types of linear motors, in which linear synchronous motor and linear induction motor are the most popular in different applications. This paper focuses on detent force optimization of the permanent magnet linear synchronous motor (PMLSM). Detent force is one of the inevitably characteristics of the PMLSM, which is seriously affected the performances of the linear drive system. Therefore, in this paper, according to the operation principle of PMLSM, the optimization design of PMLSM Detent force is investigated including four aspects such as the tooth pole ratio, primary tooth shape, the shape of the permanent magnet and the additional tooth position, to find effective methods to reduce the detent force of permanent magnet linear motor.
Detent force as the main part of the thrust fluctuation is an important performance of the permanent magnet linear synchronous motor. Based on magnetic circuit analysis model, the detent force and the end effect force analysis model is established. And the two-dimensional finite element method model is built, based on which the key factors influence on the detent force are analyzed, including the primary tooth shape, tooth position, tooth appropriate additional pole ratio, the shape of the permanent magnet.
This paper designed the different parameters of permanent magnet linear synchronous motor design, in order to optimize the detent force, the specific contents are as follows:
Firstly, the research background of the PMLSM, the development trend of the linear motor and PMLSM applications and the analysis and optimization of the detent force are summarized.
Secondly, the definition, working principle of PMLSM and the main factors that affect the detent force are introduced.
Then, the finite element analysis (FEA) software JMAG is introduced and the FEA analysis model of the PMLSM is built.
Finally, considering the characteristics of the PMLSM, the design optimization of the detent force is carried out. And the optimized parameters are obtained based on the analyses of several typical design methods.

Key words: permanent magnet linear synchronous motor (PMLSM); detent force; end effect; slot effect; Finite Element Analysis (FEA)