基于DIO模块和SA4828的三相交流信号源的实现  

Implementation of Three-phase AC Power Based on SA4828 and DIO

作　　者：陈伟元[1] 

机构地区：[1]武汉军械士官学校,湖北武汉430075

出　　处：《仪表技术》2012年第5期42-44,48,共4页Instrumentation Technology

摘　　要：针对常用三相交流电产生电路的不足,设计了一种频率和幅度可调的三相交流信号源。该信号源采用MITEL公司生产的SA4828作为三相正弦脉宽调制(SPWM)信号发生器,连接研华公司生产的DIO模块USB4751,在计算机软件的控制下,生成所需要的SPWM波形,再经过二阶有源滤波网络,即可得到作为系统激励的三相交流信号。该三相交流信号源输出的频率和电压值精确可调,电路结构简单,信号精度与稳定性高,试验结果表明系统性能满足应用要求。For the lack of common three-phase AC generating circuit, a three-phase AC signal source with adjusta- ble frequency and amplitude is designed. This signal source chooses MITEL＇s SA4828 as a three-phase SPWM signal generator, connecting Advantech＇s DIO module USB4751. Under the control of PC software, the SA4828 generates SP- WM waveforms, which can be turned into the required three-phase AC signal after passing through a second-order active filter network. This signal source outputs accurate and adjustable frequencies and voltages. It has simple circuit struc- ture, and high precision and stability. The system performance is proved by experiments to meet the application require- ments.

关 键 词：三相交流信号 SA4828 SPWM DIO 

分 类 号：TM935[电气工程—电力电子与电力传动]