高精度数控直流电流源的设计

The Design of High Precision Digital Control DC Current Source

本设计实现了直流电流源的数字化控制。整个系统由线性受控直流源、精密测量控制电路和人机接口三部分组成。电流源为双环控制系统，通过控制调整管的驱动电流，可精确控制电流源输出值的大小。测试表明该电流源具有良好的稳压稳流性能和极低的电流纹波。

This design realizes the digital control of the DC current source. The whole system consists of three units, namely, the current source, the measuring and control circuit and humanmachine interface. The current source is a double-loop control system. Through controlling the regulating transistor＇s driving current, the output current can be precisely controlled. And test justifies that this current source has optimum characteristics, such as better stabilizing voltage and very low ripple current.