單繞組多速電動機的研究及控制線路設計

電氣自動化論文編號:ZD403  論文字數:23880,頁數:53，有開題報告，任務書，文獻綜述

目   錄
摘  要  
Abstract 
第1章 單繞組多速電動機的概況 1
第2章 定子繞組方案的確定及分析 4
2.1 繞組構造和繞組圖 4
2.2槽電勢矢量圖及用槽電矢量圖排列繞組的方法 4
 2.2.1槽電勢矢量圖 4
 2.2.2用槽電勢矢量圖排列繞組的方法 5
2.3分布系數、短距系數和繞組系數 6
 2.3.1分布系數 Kd的意義和計算 7
 2.3.2短距系數Ky的意義和計算 7
 2.3.3繞組系數Kdy的意義和計算 8
2.4槽電流表和繞組磁勢圖 8
 2.4.1槽電流表 8
 2.4.2繞組磁勢圖 9
 2.4.3本人繞組方案 9
第3章 多速電動機的變極原理及設計特點 12
3.1變極調速的原理 12
3.2反向變極法的原理和繞組排列 12
 3.2.1反向變極原理 12
 3.2.2應用槽矢量圖排列多速電動機繞組 14
3.3換相變極法 18
3.4不同節距變極法 18
3.5設計特點 19
第4章 多速電動機電磁設計程序分析及電磁設計 23
4.1額定數據和主要尺寸 23
4.2磁路計算 27
4.3參數計算 29
4.4工作性能計算 34
4.5起動性能計算 36
第5章 控制線路的設計 40
5.1雙速電動機控制 40
致  謝 46
參考文獻 47

摘  要：本文研究了三相變極調速異步電動機不斷電切換繞組的設計原理，所研究的繞組均只有六個出線頭，控制方法非常簡單，提高了變速不斷電切換的可靠性，降低了變速切換的成本。這種電機在結構上與普通籠型感應電動機基本相同，但對定、轉子繞組進行了特殊設計，采用不同的連接方式，滿足了起動和運行性能的要求。介紹了該類電機繞組的設計基本原則，通過實例說明了繞組的設計方法。提出了提高感應電動機起動性能的一種新方案。感應電動機的起動性能由起動轉矩和起動電流大小來衡量，起動轉矩與起動電流的比值稱為起動品質因數。為了提高感應電動機的起動性能，常采用的方式有，2，4：改變定子繞組結構、改變轉子結構、繞線型感應電動機轉子外串電組、采用特殊結構型式等。采用這些方法雖然能在一定程度上改善電動機的起動性能，但會帶來運行性能變差、結構變復雜(需附加電刷、滑環等裝置)進而導致運行可靠性差等問題。本文提出一種新的方案，并介紹具體設計方法。
關鍵詞：變極繞組；變速切換；感應電動機；磁勢；繞組；電動機；起動品質因數

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