基于MATLAB的永磁同步电机动态磁网络分析软件的开发与联合仿真

发布时间：2018-02-23 19:35

本文关键词： 永磁同步电机动态磁网络冻结磁导率最大转矩-电流比控制　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：针对电机初步设计与验证阶段的需求,基于动态磁网络的电机电磁性能分析方法结合了传统等效磁路方法和有限元方法的优势。以等效磁网络剖分为基础,避免了等效磁路方法中大量的经验公式和假设的应用,有效提高了计算精度；以等效磁通管为基本单元,相对于有限元分析方法减小了网格剖分的数量,缩短了计算所需的时间,节约了计算资源。本文以一台600kW永磁同步电机为研究对象,基于动态磁网络原理,建立了永磁同步电机动态磁网络模型,分析了非均匀气隙等效磁导的几何求解方法,并在MATLAB编程环境中设计开发了永磁同步电机动态磁网络仿真分析软件。利用该分析软件,对永磁同步电机空载特性进行仿真,比较分析转子分段斜极对削弱定子齿谐波的作用,并与有限元分析结果进行比较,验证了动态磁网络分析软件的高效性与准确性。基于冻结磁导率方法,利用该分析软件对永磁同步电机交直轴感应电感随电机饱和程度的变化进行了研究,分析了电机不同工况下电枢交直轴电流变化对电感的影响。在动态参数的基础上,对电机负载稳态运行特性进行了分析. 在动态磁网络分析软件的基础上,设计了该软件与永磁同步电机Simulink控制系统模型的接口,并分别采用id=0矢量控制方法与最大转矩-电流比矢量控制方法进行了联合仿真,论述了最大转矩-电流比控制在凸极同步电机控制中的优势,并对动态参数模型与恒定参数模型的结果进行了比较分析。
[Abstract]:According to the requirements of the preliminary design and verification of the motor, the electromagnetic performance analysis method based on the dynamic magnetic network combines the advantages of the traditional equivalent magnetic circuit method and the finite element method. The application of many empirical formulas and hypotheses in the equivalent magnetic circuit method is avoided, and the calculation accuracy is improved effectively, and the number of mesh generation is reduced compared with the finite element analysis method, and the equivalent flux tube is used as the basic element. The time required for calculation is shortened and computing resources are saved. In this paper, a 600kW permanent magnet synchronous motor (PMSM) is studied. Based on the principle of dynamic magnetic network, the dynamic magnetic network model of PMSM is established, and the geometric solution method of non-uniform air-gap equivalent magnetic conductance is analyzed. The simulation software of permanent magnet synchronous motor (PMSM) dynamic magnetic network is designed and developed in MATLAB programming environment. By using this analysis software, the no-load characteristics of PMSM are simulated, and the effect of rotor segment inclined pole on weakening stator tooth harmonics is compared and compared with the finite element analysis results. The efficiency and accuracy of the dynamic magnetic network analysis software are verified. Based on the method of frozen permeability, the variation of induction inductance of PMSM with the saturation of PMSM is studied by using the software. The influence of armature current variation on inductance under different operating conditions is analyzed. On the basis of dynamic parameters, the steady operation characteristics of motor load are analyzed. Based on the dynamic magnetic network analysis software, the interface between the software and the Simulink control system model of PMSM is designed, and the id=0 vector control method and the maximum torque / current-current ratio vector control method are used to carry out the joint simulation, respectively. The advantages of maximum torque to current ratio control in salient synchronous motor control are discussed, and the results of dynamic parameter model and constant parameter model are compared and analyzed.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM341

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