摘要
研究两个DC/DC开关电源降压电路并联供电系统的设计.该系统使用STM32单片机芯片作为主控芯片,产生驱动MOSFET的PWM信号脉冲,同时使用AD7656芯片采集两路降压电路的输出电流信号以及并联供电的电压信号.STM32单片机获得电流信号和电压信号后,进行数字闭环PID控制,以此来实现稳定输出电压的情况下两路输出电流均流的设计.试验测试结果验证了控制算法的合理性.
This paper studied the design of a DC/DC switching mode power supply parallel operating system, In this system, STM32 single chip microcomputer was used as a main controller to generate PWM pulse which drove MOSFET. Meanwhile, AD7656 chip was used to acquire the output voltage of power supply system and the output current of each buck converter. After the acquisition of current and voltage signals, close loop PID control method was employed to realize current sharing of buck converters and stabilize output voltage of the power supply system. Experimental results show that the control algorithm is feasible.
出处
《南京工程学院学报（自然科学版）》
2016年第4期38-41,共4页
Journal of Nanjing Institute of Technology(Natural Science Edition)
基金
江苏省自然科学基金项目(BK20140766)
关键词
DC/DC
开关电源
并联供电
均流
DC/DC
switching mode power
parallel supply
current sharing
