可变频三相交流波形发生器的研制  

Design and Realization of Three-Phase Variable Frequency Alternating Current Generator

作　　者：罗洪平[1,2,3] 程安宇[1,2] 赵双[1,2] 徐洋[1,2] 

机构地区：[1]重庆邮电大学自动化学院,重庆400065 [2]重庆高校汽车电子与嵌入式系统工程研究中心,重庆400065 [3]重庆大学光电技术及系统教育部重点实验室,重庆400044

出　　处：《电子器件》2013年第5期717-721,共5页Chinese Journal of Electron Devices

基　　金：重庆高校优秀成果转化项目(KJZH11207);重庆高校创新团队建设计划项目(201014)

摘　　要：为了解决三相交流小功率电机的变频驱动问题,设计了一款三相交流变频波形发生器。首先根据单片机片内模拟数字转换器(ADC)模块测量输入信号的变化情况,利用直接频率合成(DDS)技术与单片机片内查表方法获取期望输出波形参数,并通过单片机输出驱动多路数字模拟变换器(DAC)输出三相频率随输入信号的变化而相应发生改变的交流信号,成功的实现了三相交流小功率电动机(如仪表、风扇等)的变频驱动,从而在频率合成产品的研制上完成了新的实现方法。To solve the problem of variable frequency driving of three phase small power motor,a three-phase variable frequency alternating current generator was designed. At first,the values of analog signal were sampled by the analog to digital converter（ ADC） module of the MCU. Then,the principle of DDS was used and the expectation waveform data was obtained from the data table of MCU memory. At last,through MCU outputs the data to the multichannel digital to analog converter（ DAC） chip,the waveform of variable frequency was produced. The waveform was used to drive three phase alternating current motor successfully,such as instrument motor,fan motor and so on. A new method of frequency synthesis was obtained.

关 键 词：变频 直接数字频率合成 模数转换器 信号调理 AD7226 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]