目 录
摘 要 ............................................................ I ABSTRACT .......................................................... II 绪 论 ............................................................ 1 第1章 异步电机概念 ................................................ 2 1.1异步电机的类型、特点和用途 .................................... 2 1.2异步电机的发展趋势 ............................................ 3 第2章 三相异步电动机的基本结构和工作原理 .......................... 5 2.1 三相异步电动机的基本结构 ...................................... 5 2.2三相异步电动机的铭牌数据与主要系列 ............................ 6 2.3三相异步电动机的工作原理 ...................................... 8 2.4 三相异步电动机的机械特性和工作特性 ............................ 9 第3章 电机设计基本理论 ........................................... 10 3.1电机制造与设计的概况 ......................................... 10 3.2电磁设计 ..................................................... 10 第4章 毕业设计手算程序及优化方案 ................................. 13 4.1手算程序 ..................................................... 13 4.2优化方案 ..................................................... 32 结 论 ........................................................... 36 参考文献 .......................................................... 37 附录I.CAD图 ...................................................... 39
南昌大学共青学院毕业设计
Y250-4 55KW三相鼠笼式异步电动机设计
摘 要
本文为毕业论文，是关于三相异步电动机的设计，介绍了异步电动机的特点、类型和用途，从而引出三相异步电动机的类型和结构，进一步阐述了三相异步电动机的铭牌数据、技术要求、工作原理、机械特性和工作特性等，这些都是为下一步的电动机设计做准备的。
电动机设计是个复杂的过程，需要考虑的因素和确定的尺寸、数据很多，因此遇到错综复杂的矛盾。而本文全面地、综合地看待了这个问题，充分协调了电动机的耗材量与各项性能之间以及技术指标和经济指标之间的关系。作者先按照电动机的手算程序进行手算工作，了解了国家的有关标准规定，熟悉了电动机各项指标之间的大致关系，为优化方案打了个基础。方案一中在追求节省材料时，会导致电机性能降低。方案二中采取措施提高效率、功率因数也会使起动电流变大。综合考虑各方面得失，最后得出一个既节省材料又提高性能的方案。
最后，为了使本设计直观，也为了便于生产，用CAD绘制了定子冲片图、转子装配图、绕组连接图和总装图，附在论文附录中。
关键词：异步电动机；设计；优化；绘图
I
南昌大学共青学院毕业设计
Y250-4 55KW Construct three phase squirrel-cage
asynchronous motor
Abstract
It is a disquisition of Bachelor on constructing three phase squirrel-cage asynchronous motor. This paper shows the character, type and usage of induction motor. In succession, it introduces the type and framework of three phase squirrel-cage asynchronous motor, and farther set forth its rated data, technical specification, operation theory, mechanism specialty, running specialty and so on. This is the groundwork to the design of motor.
Constructing a motor is a complexity. The designer must consider many factors and ascertain lots and lots of sizes and data, and therefore barge up against
contradiction. However, this study treats the problem all-sided and synthetically, and that well harmonizes the material wastage, capabilities, technical data as well as economical data. After the handwork count, the designer has known about the national criterion and is up on the rough connections among the specifications, which grounds for the next work. First, aspiring after economizing the materials will deteriorate the motor capabilities. Second, taking measures for augmenting efficiency and power will make the starting current large. Consequently, after considering all factors synthetically, the designer has gotten a project to both economize materials and improve capabilities.
At last, in order to understand the motor intuitionist and manufacture the motor expedite, the designer plot stator develop film graph, rotor constructional graph, coil coupling graph and general install graph. These graphs have been deposited in the excursus of this thesis
Keywords: induction motor; design；optimize；plot
II
南昌大学共青学院毕业设计
绪 论
电动机可分为直流和交流电机。由于直流电机和交流电机的特点又决定了机械设备的动力大多由交流异步电机提供，尤其以鼠笼式电机居多。据统计，在电网的总负载中，动力负载约占59%，而异步电机则占总动力负载的85%，由此可见异步电动机在工农业中的重要性，而且随着电气自动化的发展，它在工农业生产中的重要性也将逐步增大。尤其是三相鼠笼式异步电动机，具有结构简单，效率很高，使用方便，性能稳定，易于维修成本低的优点。为了保证异步电动机的安全运行，电工工作者必须掌握有关三相异步电动机的安全运行的基本知识，了解对异步电动机的安全评估，对异步电动机深入研究也是是非常必要和有意义的，要尽量节省异步电动机的材料用量，改善效率和功率因数等性能，使其能更好地适用于生产需要。
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