【摘要】 开发了一种基于电流闭环反馈控制的数控直流恒流源,介绍了该恒流源电路的详细设计思路.该系统主要利用数字信号控制器dsPIC30F4012作为核心控制部件,文中给出了设计的硬件电路和软件流程.实验结果表明,在10~2 000 mA的电流范围内,该恒流源能够达到1 mA的恒流精度或更高.该电路调整方便,控制精度高,稳定性能好,纹波系数小,具有广泛的应用前景.更多还原

【Abstract】 A DC constant current power supply circuit based on current closed-loop feedback control is brought forward in this paper and how to design the circuit is also emphatically introduced.Digital Signal Controller dsPIC30F4012 was used as a controller,and hardware architecture and software flowchart were provided.And the design have 1 mA or higher precision within the current of 10～2 000 mA.The results of experiments show that the circuit is convenient to be adjusted and has high accuracy of control,good stability,low ripple quotient and prosperous future of application.更多还原