论文总字数：25587字

摘 要

自上世纪八十年代以来，多相感应电机具有结构简单、成本低、运行性能可靠、能够实现大容量、低电压、小电流，以及电机的脉动转矩小，谐波分量少等特点。当多相感应电机定子绕组缺失一相或者多相时，其仍可以继续起动和运行，针对这种多相感应电机在平衡与非平衡状态下的起动和运行特性，众多专家学者产生了研究的兴趣。

本文是以双三相感应电机作为研究对象，由广义的两相实变换分别推导出双三相感应电机定子绕组一相和两相开路时的变换阵，从而得出双三相感应电机缺相时在静止坐标系下的广义模型，在三相感应电机的模型基础上，采用MATLAB/SIMULINK建立双三相感应电机定子绕组一相和两相开路时的动态仿真模型。

通过对计算机仿真图形的分析，研究双三相感应电机在定子缺失第一相以及缺失第一相和第六相时的动态特性。当缺失第一相和第六相时，其在子空间定子电压轨迹为圆形，分析研究表明，其余各定子的相电流均相等，并且没有转矩和速度脉动。通过对比定子相一相开路与两相开路的仿真结果，得出随着定子相开路相数的增加和开路相相位的不同，电机起动和运行特性存在较大的差异。

关键词：双三相感应电机；定子开路；子空间

Abstract

Since the eighties of the last century, with the development of power electronics and motor drives, the limitation of the number of phases of the drive being equal to that of the power supply was removed and opened the scope of exploring the multiphase motor. Multiphase machine has many advantages over the traditional three-phase motor drives such as reducing the amplitude and increasing the frequency of torque pulsation, reducing the stator current per phase without increasing the voltage per phase, lowering the dc link current harmonics and higher reliability. For that multiphase machine with capabilities to start and run even with one or more of its stator phases open-circuited when the winding structure is multiphase, recently, several papers studying the performance of multi- phase machine concerning when one or more stator phase open- circuited have been published.

In this paper, the author presents the modeling of dual-three-phase induction machine with two stator phase windings opened using vector space decomposition method. The model can be used analysis and control of the machine. The dynamic performance of the machine with structure unbalance is simulated with the help of MATLAB/SIMULINK.

To study the dynamical performance of dual-three-phase induction machine under two stator windings open-circuited, simulations by means of MATLAB/SIMULINK are implemented using the model presented in this paper. For the sake of making comparison, two cases of the machine with lost a phase and lost two phase stator windings are simulated. The trace of stator voltage vector in subspace is a circle, which means the shape of the air-gap flux is also a circle. So, there not exists torque or speed ripple in steady state when 1st and 6th phase windings opened. Compared with dual-three-phase induction machine under two stator windings open-circuited and one stator windings open-circuited, diverse space place of lost stator phase has different influence on machine.

Keywords：Dual three-phase induction machine; Stator phase open-circuited; subspace

目 录

摘 要 2

Abstract 3

目 录 4

第一章 绪 论 5

1.1 多相感应电机调速系统概述 5

1.1.1多相感应电机调速系统的分类与优缺点 5

1.1.2多相电机调速系统国内外的发展现状 6

1.1.3多相电机调速系统的应用与前景展望 8

1.2 本文研究意义与主要内容 9

1.2.1本文研究的背景与意义 9

1.2.2 本文研究的主要内容和工作 9

第二章 多相感应电机的基本理论 10

2.1 多相感应电机概述 10

2.1.1 多相感应电机的基本结构 10

2.1.2 多相感应电机绕组连接方式与相数定义 11

2.2 多相感应电机静止坐标下数学模型 12

2.2.1 电压方程 13

m相多相感应电机定子、转子的电压方程分别为： 13

2.2.2 电磁转矩方程 14

2.2.3 运动方程 15

2.3 双三相感应电机数学模型 15

第三章 多相感应电机的缺相仿真模型 22

3.1 双三相感应电机缺两相数学模型 22

3.1.1 缺两相时的电机模型 22

3.1.2 缺两相时的转换矩阵 24

3.1.3 新坐标下的α-β矢量空间 25

3.2 双三相感应电机缺相SIMULINK仿真模型搭建 27

3.3 本章小结 29

第四章 多相感应电机缺相运行状态的分析 30

4.1 双三相感应电机缺相运行时动态性能分析 30

4.1.1 缺相运行时转矩特性和稳态性能的分析与研究 30

4.1.2 缺相运行状态的仿真对比研究 30

4.2 本章小结 33

第五章 结束语 35

5.1 本文工作总结 35

5.2 进一步工作展望 35

参考文献 36

第一章 绪 论

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