三相4、6极混相变极电动机设计

毕业设计说明书

题 目： 三相4/6极混相变极电动机设计

专业班级： 电气工程及其自动化 学生姓名： 学 号：

完成日期：

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湖南工程学院毕业设计 目 录

摘要 ...................................................................... I Abstract ................................................................. II 第1章 绪 论 ............................................................. 1

1.1 研制混相变极多速电机的现实意义 .................................... 1 1.2 国内外的混相变极电动机的发展状况 .................................. 1 1.3 混相变极电动机的调速方式 .......................................... 2 1.4 论文主要研究的内容 ................................................ 3 第2章 混相及混相变极原理 ................................................ 4

2.1 混相原理简介 ...................................................... 4 2.2 混相变极原理 ...................................................... 5

2.2.1变极的基本原理 ............................................... 5 2.2.2变极调速原理 ................................................. 7 2.2.3非倍极比调速原理 ............................................. 8

第3章 混相变极定子绕组的确定 ........................................... 10

3.1 定子绕组 ......................................................... 10

3.1.1绕组的一般概念 .............................................. 10 3.1.2绕组选用的一般要求 .......................................... 10 3.1.3方案确定 .................................................... 10 3.2 混相法变极方案的分析 ............................................. 11

3.2.1槽号向量图法 ................................................ 11 3.2.2用槽号向量图排列绕组 ........................................ 12 3.3 匝比理论问题 ..................................................... 13 3.4 磁势分析和谐波计算 ............................................... 13

3.4.1 磁势的普遍表达式和绕组系数一般计算公式 ...................... 14 3.4.2整数槽混相绕组系数的计算 .................................... 15

第4章 电机电磁设计及其参数分析 ......................................... 16

4.1 主要尺寸与额定功率及转速的关系 ................................... 16 4.2 两种极对数下气隙磁密、功率、转矩的关系 ........................... 17 4.3 细长比的选择 ..................................................... 19 4.4 主要尺寸和空气隙的确定 ........................................... 19

湖南工程学院毕业设计 4.5 磁路的计算 ....................................................... 20 4.6 工作性能的计算 ................................................... 21

4.6.1定子电流的计算 .............................................. 21 4.6.2功率因数的计算 .............................................. 22 4.6.3效率的计算 .................................................. 22 4.6.4额定转差率的计算 ............................................ 23 4.6.5最大转矩倍数 ................................................ 23 4.7 起动性能的计算 ................................................... 23

4.7.1感应电机起动时漏磁路饱和效应及其对漏抗的影响 ................ 24 4.7.2集肤效应及其对转子参数的影响 ................................ 26 4.7.3起动电流和起动转矩的计算 .................................... 27

第5章 实例计算 ......................................................... 29

5.1 主要参数的确定 ................................................... 29 5.2 定子绕组及定子铁心的确定 ......................................... 29 5.3 转子冲片的确定 ................................................... 29 5.4 计算过程 ......................................................... 30 结束语 ................................................................... 55 参考文献 ................................................................. 56 致 谢 .................................................... 错误！未定义书签。 附 录

湖南工程学院毕业设计 三相4/6极混相变极电动机设计

摘要：单绕组多速电动机，其转子为笼型绕组，通过改变定子绕组的接法，从而改变其极对数，从而达到调速的目的。具有结构简单、运行可靠、成本低廉等优点而被广泛应用。在本文采用的是混相变极原理对单绕组变速电动机进行设计。

本文首先要介绍单绕组多速电动机在现在社会生产的应用和发展，让我们有明确的设计方向和意义。同时在以前的生产经验的基础和我们查阅资料的前提下，确定用混相法设计定子绕组的方案并做出分析，画出槽号相位图和绕组接线图。同时把在设计过程中，我们需要了解的变极调速原理有深入的介绍，各种变极调速的方法原理及绕组排列，清楚单绕组变速电动机运行时的各种特性及设计特点。然后在电机的设计部分，先详尽的叙述了电机设计程序及各主要参数的意义，同时通过给定的数据进行电机设计的计算。

关键词：混相变极； 多速电动机； 槽号相位图； 电磁计算

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湖南工程学院毕业设计 A mixed phase change motor design of Three-phase 4 / 6

Abstract ：The motor of many speeds of single winding, its rotor is a cage type winding, through change law of connecting , stator of winding , change logarithm very much its , thus achieve the goal of adjusting speed. Have of simple structure operating reliable , cost advantaging such as being cheap extensive application. In literary grace this it spends to be to is it become principle change speed to single winding the motor is designed very much to mix.

This text should introduce the motor of many speeds of single winding in the application and development of social production now first, let us have clear design direction and meaning. At the same time the foundation and we of former production experience are consulted under the prerequisite of the materials, confirm that draws the picture of phase place of brass-wind instrument of trough and winding wiring diagram by mixing the scheme of designing the stator winding of the looks law and making analysis. In the course of designing at the same time, we need understand is it transfer speed principle have deep introductions very much to become, various kinds of is it transfer method principle and winding of speed arrange , clear single winding change speed motor operate various kinds of characteristics when and design the characteristic very much to become. Then some designs in the electrical machinery, exhaustive narration electrical machinery design program first and every main meaning of parameter, at the same time through carrying on the calculation that the electrical machinery is designed for the data definitely.

Key word: Mixes pole-changing; multispeed electromotor; slot number phase diagram; electromagnetism computation.

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