异步电动机变频调速控制系统设计(2)

希望有用供大家参考

指导教师：xxx

摘 要：本文对变频调速理论、逆变技术、SPWM产生原理进行了研究，在此基础上设计了

一种新型数字化三相SPWM变频调速系统，以8051控制专用集成芯片 SA4828为控制核心，

采用IGBT作为主功率器件，同时采用EXB840构成IGBT的驱动电路，整流电路采用二极

管，可使功率因数接近1，并且只用一级可控的功率环节，电路结构比较简单。本文在控制上采用恒Vf控制，同时，软件程序使得参数的输入和变频器运行方式的改变极为方便，新

型集成元件的采用也使得它的开发周期短。此外，本文对SA4828三相SPWM波发生器的

使用和编程进行了详细介绍，完成了整个系统控制部分的软硬件设计。

关键字：变频调速；正弦脉宽调制；Vf控制；SA4828波形发生器

Induction motor speed-adjusted system design

The student：xxx

The teacher：xxxxxx

Electronic information and engineering institute from Huainan Normal University

Abstract:This thesis has a research on these technologies: Variable Voltage Variable Frequency

motor drive, inverter, and the creation principle of SPWM, Based on the results of the study, I

designed a system of a new digital three phases VVVF motor drive system. It uses ASIC-SA4828

controlled by 8051 as main controlling core, it uses IGBT as power device, and uses EXB840 as

drive. It uses diodes as converting circuit unit, which makes power factor close to 1. Because I only need to control inverter, the whole circuit is very simple.I adopt the means of linear Vf

operation. At the same time, it is very convenient to input parameters or change the drive’s

operating mode due to the software procedure. Moreover, owing to the advantages of the new

integrated parts, it costs less time to develop this motor drive.This thesis has also detail introduced

the method of the usage and the programs of the three phases SPWM wave generator SA4828.

The software and the hardware of the control part in system have been completed.

Keywords: variable frequency speed control；Sine Pulse Width Modulation (SPWM)；

Vfoperation； SA4828 Wave Generator

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