《电动机变频调速系统设计论文》由会员分享，可在线阅读，更多相关《电动机变频调速系统设计论文（41页珍藏版）》请在金锄头文库上搜索。
1、I摘要变频器是交流电气传动系统的一种，是将交流工频电源转换成电压，频率均可变的适合交流电机调速的电力电子变频装置，英文简称 VVVF（Variable Voltage Variable Frequency） 。思路是先控制变频器，再用变频器对电机进行调速。介绍了基于 S72-200PLC的电机变频调速试验系统的组成、控制方案及信号处理方法,设计了硬件电路、相关梯形图程序及触摸屏显示程序。调试应用表明,该系统简单、实用。通过该综合设计型试验或课程设计的实践、锻炼,可使学生进一步掌握 PLC 和变频调速控制系统原理及应用 ,熟使用触摸屏 ,为将来进行相关设计工作打下基础。对其他相关课题也具有很好的
2、借鉴作用和参考价值。关键词：异步电机;变频器;调速IIAbstractThe inerter is a power electronic conversion device of AC electric transmission system, which converts AC power-frequency voltage and frequency to be fit for AC motor speed control ,and is called VVVF(Variable Voltage Variable Frequency) .The design is based on the
3、 controls the inverter, and then the inverter control the speed of the motor.Based on S72 200 PLC, the variable frequency s peed2 adjusting experi ment system is intr oduced withthe constituti on and contr olling scheme and signal2 dis posalmethods of this system, and the hardware circuit, relatedtr
4、apezoid chart and dis p laying p rogram of t ouch screen is designed aswell . The debugging results show that the systemis si mp le and p ractical . Students can better master the rrinci p le and the app licati on of PLC and variable frequencys peed2 adjusting system thr ough the p ractice and exerc
5、ise of general designing experi ment or curriculum design . Fur2thermore, they can also use the t ouch screen skillfully, which will lay a good foundati on for their future design work inthis filed . The paper p r oves t o be of high value for reference in the other related research .Key words: indu
6、ction motor;inverter;Speed control,PLCIII目 录摘要 .I Abstract .II 1 绪 论.1 1.1 概述.1 1.2 变频调速技术的发展.1 1.2.1 电力电子器件的发展.1 1.2.2 变频调速技术的发展意义.4 2 异步电动机的基本原理及调速方法.9 2.1 异步电动机概述.9 2.1.1 异步电动机基本结构.9 2.1.2 异步电动机的旋转原理.10 2.1.3 异步电动机电路的等效变换.11 2.1.4 异步电机变频调速原理.15 2.1.5 变频调速的控制方式及选定.17 3 变频器主电路设计.18 3.1 整 流 电 路.18 3.1.1 不可控整流电路.18 3.2 中 间 电 路.20 3.3 逆 变 电 路.20 3.3.1 逆变电路的工作原理.21 3.3.2 电压型和电流型逆变电路.21 3.3.3 三相桥式逆变电路.22 4 变频参数与选择.23 4.1 功能及参数.23 4.1.1 频率的给定功能.
