HEF4752为核心的交流调速系统控制电路模板的设计与开发

文档编号:JD486  附开题报告,任务书,原理图,PCB,文档字数:23717,页数:51 

摘 要

 在许多自动控制系统中，都需要有稳定的三相PWM发生电路。本文介绍了以大规模全数字集成电路HEF4752为核心设计的三相 PWM发生电路，结构简单，使用方便，易于控制。本文还介绍了芯片HEF4752的脚管功能、内部结构及工作原理，同时描述了这种电路在变频调速系统中的重要应用。由HEF4752产生三相基波频率、幅值和死区时间可调的SPWM波形，实现电动机的变频调速控制。最后运用Protel99SE软件绘制出该系统的硬件原理图和PCB图。该系统虽然仅用硬件来实现，但结果表明以HEF4752为主要控制芯片的SPWM波形发生器结构简单、成本低、性能好、调试方便、运行可靠。

关键词：HEF4752  变频调速  正弦脉宽调制技术  PCB

ABSTRACT

In a lot of automatic controling systems, the steady occurring three-phase PWM circuit is needed.This paper describes the new type occurning three-phase PWM circuit which the numeral IC HEF4752 is core, and introduces the mounts, the construction and function of the IC HEF4752. The construction of  this circuit is very simple. The circuit is controlled easily and used expendiently. At last the software Protel 99SE is used to the draw the SCH and PCB. Although the system achieve only by the hardware , but the results showed that the main control to IC HEF4752 chip SPWM waveform generator is simple, low cost, performance, and debugging convenient, reliable operation.

Key words：HEF475  Frequency converted speed  SPWM  PCB

目 录
前  言...................................................................... 3
第一章  绪论 ..................................................................4
1.1 课题背景与意义 ............................................................4
1.2文档内容与安排 .............................................................4
第二章 交流变频调速系统 .......................................................6
2.1交流调速系统 ...............................................................6
2.1.1 交流调速系统的特点 ......................................................6
2.1.2交流调速系统的分类 .......................................................6
2.1.3交流调速系统的发展趋势 ...................................................7
2.2交流变频调速的基本原理 .....................................................8
2.2.1交流异步电动机变频调速原理 ...............................................8
2.2.2变频调速系统的控制方式 ...................................................9
第三章 脉宽调制控制技术 ......................................................12
3.1脉宽调制控制的方法 ........................................................12
3.2正弦波脉宽调制（SPWM）法 ..................................................13
3.2.1 基本思想 ...............................................................13
3.2.2 SPWM信号的调制方式 .....................................................14
3.3 SPWM脉冲的生成方法 .......................................................15
3.3.1完全由模拟电路生成 ......................................................15
3.3.2 由专用集成芯片生成 .....................................................16
第四章 控制电路的设计 ........................................................24
4.1 系统原理图 ...............................................................24
4.2 给定积分器电路 ...........................................................25
4.3 绝对值运算电路 ...........................................................27
4.4 电压-频率变换器电路 ......................................................28
4.5 函数发生器电路 ...........................................................29
4.6 多谐震荡器电路 ...........................................................30
4.7极性鉴别电路 ..............................................................33
第五章 电路的硬件图及PCB图....................................................34
5.1 Protel  99SE功能介绍 .....................................................34
5.2 硬件原理图的绘制..........................................................35
第六章  总结 .................................................................37
6.1文档总结...................................................................37
6.2 感想 ...................................................................37
致   谢 ....................................................................38
参考文献 .....................................................................39
附录1：英文资料...............................................................40
附录2：英文翻译...............................................................46
附录3：原理图及PCB图   

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