本科毕业设计说明书
基于TMS320LF2407A的数字逆变电源的设计 THE DESIGN OF DIGITAL INVERTER BASED ON
TMS320LF2407A
学院（部）：电气与信息工程学院 专业班级： 学生姓名： 指导教师：
2013年 06 月 01 日
基于TMS320LF2407A的数字逆变电源的设计
摘要
逆变电源是一种采用电力电子技术是进行电能变换的装置，它从交流或直流输入获得稳压恒频的交流输出。逆变电源技术是一门综合性的产业技术，它横跨电力、电子、微处理器及自动控制等多学科领域，是目前电力电子产业和科研的热点之一。逆变电源广泛应用于航空、航海、电力、铁路交通、邮电通信等诸多领域。电源技术的发展使得数字控制系统控制的电源取代传统电源已成为必然。
逆变电源的发展是和电力电子器件的发展联系在一起的，器件的发展带动着逆变电源的发展。目前逆变电源的核心部分就是逆变器和其控制部分，虽然在控制方法上已经趋于成熟，但是其控制方法实现起来还是有所困难。因此，对逆变电源的控制和逆变器进行深入研究具有很大的现实意义。
随着现代科学技术的迅猛发展，逆变技术目前已朝着全数字化、智能化、网络化的方向发展。而作为专用的DSP的出现，更是为研究和设计新型的逆变电源提供了更方便、更灵活、功能更强大的技术平台。本文采用美国德州仪器公司(TI)新近推出的一种TMS320LF2407A数字信号处理器，作为逆变电源中的核心控制部分进行研究。以实现所研制的逆变装置能输出标准的正弦交流电。
本文主要分析了变频电源技术现状、发展趋势和存在的难点，指出论文的研究内容和意义。详细讨论了逆变器的SPWM调制法工作原理，介绍了数字实现时对称规则采样法和不对称规则采样法的特点。通过分析SPWM波形产生规律和特点，选择了以不对称规则采样法为基础实现的单极性SPWM控制，并且具体介绍了DSP实现SPWM。文中设计出了整个逆变电源的硬件结构，其主要核心部分是IPM和DSP控制部分。这两部分的结合使得该电源结构简单、性能优良。并且针对DSP控制系统的各个部分进行了软件设计，给出了相应的软件流程图。
关键词：逆变电源，SPWM，TMS320LF2407A,IPM
安徽理工大学毕业设计
THE DESIGN OF DIGITAL INVERTER BASED ON
TMS320LF2407A
ABSTRACT
Inverter is a power electronic technology is used for energy conversion device, which obtained from AC or DC input voltage constant frequency AC output. Inverter technology is a comprehensive contention industry technology, it stretches electricity, electronics, microprocessors and other multi-disciplinary field of automatic control, is the power electronics industry and scientific research hot spots. Power inverter is widely used in aviation, marine, electric power, railway transport, post and telecommunications, and many other fields. Power technology enables digital power control system to replace the traditional power has become a necessity.
The development of power inverter and power electronic devices linked to the development of the device led to the development of power inverter development. Currently inverter is the core part of the inverter and its control part, although the control method has become mature, but its control method to achieve it is still somewhat difficult. Therefore, the inverter and the inverter to control depth study has great practical significance.
With the rapid development of modern science and technology. As inverter technology has been moving all-digital, intelligent, network oriented direction. As a dedicated DSP appearance, but also for research and design of new power inverter provides a more convenient, more flexible, more powerful technology platform. In this paper, Texas Instruments(TI)recently introduced a TMS320LF2407A digital signal processor as the core power inverter control part of research. Developed in order to achieve the standard inverter device can output a sinusoidal alternating current.
II
安徽理工大学毕业设计
This paper analyzes the variable frequency power supply technology status, trends and the presence of difficulties, that the thesis content and meaning. Discussed in detail SPWM modulation inverter principle, introduced a digital realization symmetric and asymmetric sampling rules the rules of sampling characteristics. SPWM waveform generated by analyzing the rules and characteristics, chose to asymmetric regular sampling method is based on the realization of the unipolar SPWM control, and specifically describes the DSP implementation SPWM. The paper designed the entire inverter hardware structure, the main core of the IPM and DSP control section. The combination of these two parts so that the power of simple structure, excellent performance. And the DSP control system for the various parts of the software design, gives the corresponding software flow chart.
KEYWARDS:inverter,spwm,tms320lf2407a,ipm
III
安徽理工大学毕业设计
目录
摘要(中文) ........................................................ II 摘要(外文) ...................................................... IIII 1.绪论 ............................................................. 1
1.1引言 ........................................................ 1 1.2逆变器的现状及发展趋势 ...................................... 1
1.2.1逆变器的现状 ........................................... 1 1.2.2逆变器的发展趋势 ....................................... 2 1.3主要内容和章节安排 .......................................... 4 2.逆变系统基本结构及控制策略 ....................................... 5
2.1现代逆变系统基本结构 ........................................ 5 2.2 SPWM控制技术及其原理 ...................................... 6
2.2.1逆变系统的原理 ......................................... 6 2.2.2 SPWM控制基础 ........................................ 8 2.2.3 PWM波形的基本原理 ................................... 9 2.3 SPWM采样方法对比分析 ...................................... 9 2.4 SPWM控制方式分析 ......................................... 13
2.4.1单极性SPWM控制方式 ................................. 14 2.4.2双极性SPWM控制方式 ................................. 15 2.4.3单极性和双极性调制比较 ................................ 16 2.5使用DSP实现SPWM波 ...................................... 16
2.5.1 DSP的事件（EV）管理器模块介绍 ....................... 16 2.5.2 DSP中断及中断向量 ................................... 20 2.5.3 DSP控制三相SPWM波形产生原理分析 .................. 21
3.基于DSP系统的硬件设计与研究 .................................... 23
3.1三相逆变电源主电路结构的比较分析 ........................... 23 3.2基于DSP系统的逆变电源硬件结构设计 ......................... 24
3.2.1硬件结构图 ............................................ 24 3.2.2整流、滤波电路的设计 .................................. 24 3.2.3输出滤波电路的设计 .................................... 26 3.3智能功率模块IPM的设计 ..................................... 27
3.3.1 智能功率模块IPM的介绍 ............................... 27 3.3.2 IPM模块的选择 ....................................... 28
i