摘要
为提高电动机保护装置数据采集的精度,在使用TMS320LF2407内置10bitADC的情况下,设计了用运放进行直流偏置使双极性信号转换为单极性信号及实现两段量程转换的电路,通过对两段量程的选择提高了数据采集的精度。为解决装置中3.3V和5V器件互相传输信号的问题,研究了它们互相接口的方法,设计了电平转换电路。
In order to enhance the accuracy of data acquisition, operational amplifier is used to design a circuit to transform the analog signals from double polarity to single polarity and divide the signals into two ranges. Through choosing the range, the accuracy of data acquisition is enhanced. This circuit adopts 10 bits ADC which is integrated in TMS320LF2407. The problem of transmitting signal between 3.3 V and 5 V electrical levels is solved. Their reciprocal interface method is discussed and the level-translation circuit was designed.
出处
《低压电器》
北大核心
2006年第8期20-23,共4页
Low Voltage Apparatus
关键词
电动机保护
数据采集
电平转换
motor protection
data acquisition
level-translation
