DSP电机调速

文档编号:JD082    字数:32875,页数:76

摘要
近年来，随着新一代电力电子器件和微处器的推出，以及精确的电机模型和各种先进的控制策略的提出，极大的促进了电机控制的发展，使得精度高、调速范围宽、控制性能好的电机控制系统的实现成为可能。
本文以三相交流异步电动机为被控对象，采用IGBT作为主功率器件,以TMS320LF2407A (16位定点DSP芯片)为处理器，设计了变频调速系统的主电路，包括整流部分和逆变部分设计了针对过压过流等危险情况的保护电路，完成了调制程序的编写。并且设计了键盘和显示电路，完成了数据向主控制芯片的传送，实现了数据的交流。
采用了一种基于DSP芯片TMS320LF2407A的SPWM波形产生方法，用这种方法获得的SPWM信号的稳定性和精确性优于用模拟电路和专用集成电路产生的SPWM信号。介绍了SPWM原理及其在DSPTMS320LF2407A芯片为核心的控制系统中的应用。

关键词  变频控制器  DSP  SPWM波

Abstract
In the recent years, with the appearance of the new power electron apparatus and microprocessor，the accurate asynchronous motor model and all kinds of advanced theories that have resulted in the development of motor control. The motor controller which haves high accuracy and control performance, wide speed regulating range can be possibly realized.
In this paper three phase AC asynchronous motor is the controlled object and is used as the main IGBT power devices regard TMS320LF2407A (16 fixed-Points DSP chip) as the Processor，the design of the inverter main circuit, including the rectifier and inverter part of the design against over voltage and dangerous flow of the protection circuit, completed the preparation of the modulation procedures. And the design of the keyboard and display circuit, completed the data to the main control chip transmission of data exchange.
Introduced a micro controller-based TMS320LF2407A SPWM waveform generator, This method was used SPWM signal stability and accuracy better than analog circuits and the ASIC SPWM signal. SPWM introduced in TMS320LF2407A principle at the core of the control system applications.

Key words  inverter controller  DSP  SPWM

目录
摘要 .............................................................I
Abstract..........................................................II
第1章绪论........................................................1
1.1 变频调速的发展 ...............................................1
1.2 交流调速的意义和发展方向 .....................................3
1.3 本文档的研究内容..............................................5
第2章 交流电机控制方案的确定......................................6
2.1 SPWM变频调速原理..............................................6
2.2 转速闭环控制系统..............................................8
第3章变频调速系统的硬件电路设计 ................................13
3.1 变频调速系统的总体设计 ......................................13
3.2 主电路的设计 ................................................14
3.2.1 主回路电路参数的计算及设计.................................14
3.2.2 IGBT驱动电路的设计 ........................................17
3.3 保护电路的设计.............................................. 21
3.3.1 泵升保护电路的设计 ........................................22
3.3.2 过压及欠压保护电路的设计...................................23
3.3.3 过流保护电路的设计 ........................................24
3.3.4 限流启动电路的设计.........................................25
3.4 控制电路的设计...............................................26
3.4.1 DSP（TMS320LF2407A）的最小系统电路.........................26
3.4.2 键盘电路...................................................30
3.4.3 光耦隔离电路...............................................32
3.4.4 显示电路 ..................................................32
3.4.5 转速测量采样电路 ..........................................34
第4章控制电路设计和实现..........................................36
4.1 TMS320LF2407芯片 ............................................36
4.2 主程序 ......................................................37
4.3 转速闭环程序.................................................39
4.4 SPWM波形程序 ................................................40
社会经济效益分析 ................................................45
结论............................................................ 46
致谢 ............................................................47
参考文献 ........................................................48
附录1 中文译文 ..................................................49
附录2 英文原文 ..................................................55
附录3 ...........................................................64
附录4 ...........................................................72

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