水情遥测系统电源设计

Design of Power Supply Used in Hydrologic Information System

文章介绍了一种供水情遥测系统使用的开关电源电路,利用脉宽调制的方法,将发电系统输出的直流信号变换成一个有可变占空比的方波信号,通过改变DC/DC变换电路的占空比,调节负载特性,从而将输出电压稳定在12V。试验证明:该电路稳定性好、输出电压精度较高并且能很快稳定,能较好地满足水情遥测系统供电需求。

This paper introduces a kind of switching mode power supply used for hydrologic information system. By using PWM, DC signal from generation system is converted into the square wave signal with a alterable duty cycle. The output voltage is stabilized at twelve volts by changing the duty cycle of DC/DC transformation circuit and adjusting the load characteristics. Experiment shows that this circuit has good stability as well as higher precision in output voltage which can be kept stable quickly. Moreover it can satisfy the requirements of hydrologic information system power supply.