交流异步电机变频调速系统的设计.docx

PAGE 学士学位论文 论文题目：交流异步电机变频调速系统的设计 学院名称： 电气工程学院 专业班级： 电气工程及其自动化 学生姓名： 学 号： 指导教师： 完成日期： 年 月 日 PAGE II 摘要 工业的不断发展，自动化程度的不断提高，交流电机的调速问题已经成为电气领域、电力拖动控制系统中的一个重要组成部分，为适应生活生产的实际需要，研究交流电机调速系统，很有必要。 本论文研究的是基于SVPWM的异步电机变频调速系统控制，主要目的是减少在调速时因为转速的波动而造成的影响。本次研究的平台是基于MATLAB中的Simulink，通过建立SVPWM控制逆变器供电下异步电机变频调速系统仿真模型，在Simulink中就行仿真，观察并分析电机运行的动态特性曲线，实现异步电机变频调速系统的设计。 本文中重点阐述近似圆形磁链控制的思想及电压利用率，定子磁链的准确估算对电压空间矢量的选择影响很大，是提高SVPWM控制性能的关键，详细阐述定子磁链的准确估算的方法。 关键词：异步电机；SVPWM；MATLAB Design?of?AC?asynchronous?motor?variable?frequency?speed?regulation?system Abstract With?the?continuous?development?of?industry?and?the?continuous?improvement?of?the?degree?of?automation,?the?speed?regulation?of?AC?motor?has?become?an?important?part?of?the?electrical?field?and?the?power?drive?control?system.?In?order?to?meet?the?actual?needs?of?life?and?production,?it?is?necessary?to?study?the?speed?regulation?system?of?AC?motor.This?paper?is?based?on?SVPWM?asynchronous?motor?variable?frequency?speed?regulation?system?control,?the?main?purpose?is?to?reduce?the?speed?fluctuation?in?the?speed?caused?by?the?influence.The?platform?of?this?study?is?based?on?MATLAB?Simulink,?through?the?establishment?of?SVPWM?control?inverter?power?supply?asynchronous?motor?variable?frequency?speed?regulation?system?simulation?model,?in?Simulink?on?the?line?simulation,?observation?and?analysis?of?the?dynamic?characteristics?of?the?motor?operation?curve,?to?achieve?the?design?of?asynchronous?motor?variable?frequency?speed?regulation?system.This?paper?focuses?on?the?idea?of?approximate?circular?flux?control?and?voltage?utilization.?The?accurate?estimation?of?stator?flux?has?a?great?influence?on?the?choice?of?voltage?space?vector,?and?is?the?key?to?improve?the?SVPWM?control?performance.?The?method?of?accurate?estimation?of?stator?flux?is?described?in?detail. Keywords:?asynchronous?motor;SVPWM;MATLAB 目录 TOC \o "1-3" \h \z \u 摘要