单片机控制的直流并联供电系统的设计与研究

Design and Research of the parallel microprocessor controlled DC power supply system

随着电力电子技术的发展,电子装置要求电源功率高,输出电流大。单个开关电源模块已经不能满足使用要求。因此,研究和设计多电源模块并联供电系统具有一定的实用价值。本文采用模块化的设计方法,将整个并联供电系统分为DC/DC、单片机控制电路、电压电流检测和显示模块。通过BUCK降压斩波电路,使得系统能够输出8V电压,在总输出电流为4A时,能很好的实现1:1的均流,供电系统的效率可达85%以上,并设计了自动恢复的过流保护电路。实验结果表明,系统达到了设计要求,使用方便。

With the development of power electronic technology, the modem electronic devices require more higher power and the larger current. But the single module of power supply can not satisfy the application requirements. Therefore, it is of significance in practice to study and design the power supply system composed of many modules connected in parallel to meet the needs of high power and large current. The system designed in this paper consists ofDC/DC, control circuit, voltage and current sensing, and dis- playing modules. The system can output 1A current, 8V voltage, and achieve 1：1 uniform current distribution. The automatic recov- tion requirements, and easy to operate.