论文编号:CK103论文字数:12826,页数:43
摘 要
随着电力电子技术的飞速发展，正弦波输出变频电源已被广泛应用在各个领域中，与此同时对变频电源的输出电压波形质量也提出了越来越高的要求。在实验室和工业部门，三相正弦波变频电源常用于各种测量和控制电路中，产生单相或三相正弦波信号作为基准信号，基准正弦波的波形质量直接影响到测量和控制的精度。对于一个良好的正弦信号源，要求其输出的基准正弦波信号幅值、频率高度稳定、失真度小、带负载能力强、幅值可调，对于三相正弦波信号还要求三相对称度好。兼顾这些要求往往使电路变得复杂。因此，研究开发既简单又具有优良动、静态性能的逆变器控制策略，已成为电力电子领域的研究热点之一。
关键词：三相正弦波 变频 逆变
Abstract
Along with the rapid development of power electronic technology, sinusoidal output variable frequency power has been widely applied in various fields, meanwhile the output of variable frequency power voltage waveform quality also put forward higher request. In the laboratory and industrial sectors, three-phase inverter power often used in all kinds of sine wave measuring and controlling circuit, produce single-phase three-phase sine signals, or as the benchmark signals, the benchmark sine wave quality directly affect the accuracy of measurement and control. For a good sine signal output of its benchmark sine signal amplitude, frequency stability, high degree of small and load capacity, amplitude, adjustable for three-phase sine signals, also requires good symmetry three-phase. Both these requirements often make complicated circuit. Therefore, the research and development is simple and has good dynamic and static performance of the inverter control strategy, has become the focus of research in the field of power electronics.
Keywords：Three-phase sine wave frequency inverter
目 录
摘要……………………………………………………………………………. . .……………..3
1 前言…………………………………………………………………………………………...7
2 总体方案设计……………………………………………………………………………. . .8
2.1 系统设计框图…………………………………………………………………….……8
2.2 系统原理框图…………………………………………………………………….... . ..8
3 方案论证……………………..…………………………………………………………...10
3.1 AD-DC模块…………………………………………………………………………..10
3.2 DC-DC 模块………………………………………………………………………….10
3.3 DC-AC模块论证…………………………………………………………………..…13
3.4 测量模块方案论证……………………………………………………………………..16
3.5 控制模块方案论证……………………………………………………………………..17
4 硬件设计……………………………………………………………………….……….…....18
4.1 硬件简介……………………………………………………………………………....18
4.2 整流滤波电路……………………………………………………………………..…..20
4.3 斩波及驱动电路……………………………………………………………….……...20
4.4 逆变及驱动电路…………………………………………………………….………...24
4.5 真有效值转换电路…………………………………………………………………....26
4.6 液晶显示及存储电路………………………………………………………………..27
4.7 过流保护电路…………………………………………………………………….….27
4.8 过压保护电路……………………………………………………….…………….…28
4.9 单片机外围电路………………………………………………………………….….29
4.10 供电电源……………………………………………………………………………..30
5 软件设计…………………………………………………………………………. . .….…32
5.1 软件设计简介…………………………………………………………………….…32
5.2 SPWM波的实现………………………………………………………………….……32
5.3 PWM波的实现……………………………………………………………..…….……32
5.4 ADC0809的控制程序设计……………………………………………..….………33
5.5 液晶显示的驱动设计 35
5.6 矩阵式的键盘设计 37
5.7 系统总体软件设计…………………………………………………………………38
6 系统的调试………………………………………………….…………………………....40
6.1 测试仪器与设备………………………………………………………………….…40
6.2 指示测试………………………………………………………………………….…40
7 总结.................………………………………………………………………….…….….43
致谢 44
参考文献 4
三相正弦波变频电源设计......