单绕组多速电动机的研究及控制线路设计

电气自动化论文编号:ZD403  论文字数:23880,页数:53，有开题报告，任务书，文献综述

目   录
摘  要  
Abstract 
第1章 单绕组多速电动机的概况 1
第2章 定子绕组方案的确定及分析 4
2.1 绕组构造和绕组图 4
2.2槽电势矢量图及用槽电矢量图排列绕组的方法 4
 2.2.1槽电势矢量图 4
 2.2.2用槽电势矢量图排列绕组的方法 5
2.3分布系数、短距系数和绕组系数 6
 2.3.1分布系数 Kd的意义和计算 7
 2.3.2短距系数Ky的意义和计算 7
 2.3.3绕组系数Kdy的意义和计算 8
2.4槽电流表和绕组磁势图 8
 2.4.1槽电流表 8
 2.4.2绕组磁势图 9
 2.4.3本人绕组方案 9
第3章 多速电动机的变极原理及设计特点 12
3.1变极调速的原理 12
3.2反向变极法的原理和绕组排列 12
 3.2.1反向变极原理 12
 3.2.2应用槽矢量图排列多速电动机绕组 14
3.3换相变极法 18
3.4不同节距变极法 18
3.5设计特点 19
第4章 多速电动机电磁设计程序分析及电磁设计 23
4.1额定数据和主要尺寸 23
4.2磁路计算 27
4.3参数计算 29
4.4工作性能计算 34
4.5起动性能计算 36
第5章 控制线路的设计 40
5.1双速电动机控制 40
致  谢 46
参考文献 47

摘  要：本文研究了三相变极调速异步电动机不断电切换绕组的设计原理，所研究的绕组均只有六个出线头，控制方法非常简单，提高了变速不断电切换的可靠性，降低了变速切换的成本。这种电机在结构上与普通笼型感应电动机基本相同，但对定、转子绕组进行了特殊设计，采用不同的连接方式，满足了起动和运行性能的要求。介绍了该类电机绕组的设计基本原则，通过实例说明了绕组的设计方法。提出了提高感应电动机起动性能的一种新方案。感应电动机的起动性能由起动转矩和起动电流大小来衡量，起动转矩与起动电流的比值称为起动品质因数。为了提高感应电动机的起动性能，常采用的方式有，2，4：改变定子绕组结构、改变转子结构、绕线型感应电动机转子外串电组、采用特殊结构型式等。采用这些方法虽然能在一定程度上改善电动机的起动性能，但会带来运行性能变差、结构变复杂(需附加电刷、滑环等装置)进而导致运行可靠性差等问题。本文提出一种新的方案，并介绍具体设计方法。
关键词：变极绕组；变速切换；感应电动机；磁势；绕组；电动机；起动品质因数

Research Of Single-Coil Multiple-Speed Induction Motor
ABSTRACT：The design principle of pole-changing windings without interruption of power supply for three-phase induction motor is studied in this paper. All the windings studied have six terminals. The method of controlling speed-changing switchover is very simple, and the reliability of speed-changing switchover is improved while the cost of switch of pole-changing windings is decreased.A new type of induction motor with quick-starting quality factor is studied in this paper. This type of motor is similar to the cage induction motor in structure, but its stator and rotor winding is designed particularly and a different connecting method is adopted ,which meets the demand of starting and operating properties. The basic designing principle of this type of motor winding is introduced and an example is given to illustrate the design method of the winding .A mew solution is proposed to solve the problem of starting properties of the induction motor.The graphite start-up resistor rod different from the traditional start-up device is developed based on testing of various start-up techniques in the salt-bath furnace.It is proved that the graphite start-up resistor rod can be long life, conveniently operated,low cost,and easily made and maintained. A new approachis presented for the development of the start-up technique in the salt-bath furnace.
Keywords:pole-changing;speed-changingswitchover;inductionmotor;magnetometive;force;winding;motor;starting quality factor