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论文编号:ZD1343 论文字数:8137,页数:21
论文题目：三相异步电动机变频控制调速系统仿真
摘 要
三相异步电机是感应电机，定子通入电流以后，部分磁通穿过短路环，并在其中产生感应电流。短路环中的电流阻碍磁通的变化，致使有短路环部分和没有短路环部分产生的磁通有了相位差，从而形成旋转磁场。通电启动后，转子绕组因与磁场间存在着相对运动而感生电动势和电流，即旋转磁场与转子存在相对转速，并与磁场相互作用产生电磁转矩，使转子转起来，实现能量变换。本文对三相异步电机的变频调速进行了分析。
本文首先总结了变频调速的发展历程和概括，阐述了变频器的分类和特点；其次分析了变频器电源谐波对电机性能的影响，包括对电机功率因素的影响和电机损耗的影响；在此基础上进行了变频调速异步电动机分析，文章最后进行了异步电动机变频控制系统的分析。
关 键 词：三相电机；变频调速；系统仿真
论文类型：理论研究
Title：Simulation of three-phase induction motor variable frequency speed control system
ABSTRACT
Three-phase asynchronous motors are induction motors, the stator currents pass into the after part of the flux through the circuit loop, and in which the induced current. Short-circuit loop current impede flux changes, causing a short circuit ring-ring and no part of the magnetic flux generated with the phase, to form the rotating magnetic field. After power-up, the rotor winding and the magnetic field due to the relative motion exists between the induced electromotive force and current, that is, there is a relatively rotating magnetic field and the rotor speed, and with the magnetic interaction of the electromagnetic torque, the rotor turn up, to achieve energy conversion. In this paper, three-phase asynchronous motor frequency control is analyzed.
This paper summarizes the history and development of frequency control summary to explain the classification and characteristics of the inverter; followed by analysis of the inverter power supply harmonics on motor performance, including the impact of the motor power factor and motor loss of influence; in based on the analysis of inverter-driven induction motor, the article concluded with induction motor variable frequency control system analysis.
KEY WORDS：Three-phase motor; frequency control; system simulation
TYPE OF THESIS：Project Design
目 录
摘 要 I
ABSTRACT III
目 录 V
1 绪论 1
1.1 交流调速发展概况 1
1.2 变频器的分类及基本特点 2
1.3 课题的背景和意义 2
2 变频器电源谐波对电机性能的影响 5
2.1 电源谐波对电机功率因数的影响 5
2.2 电源谐波对电机损耗和效率的影响 5
2.3 电源谐波产生的附加损耗 6
3 变频调速异步电动机分析 7
3.1 逆变器类型与电机参数的关系 7
3.2 磁负荷与气隙的选择 7
3.3 绕组与槽形分析 8
4 异步电动机变频控制器系统分析及仿真 9
4.1 变频电机与变频调速器的匹配 9
4.2 变频仿真系统及结果 9
5 结论 12
致 谢 13
参考文献 15
附录 16
