基于单片机控制的数控直流电流源设计

系统设计从使用简单,调整方便,界面友好的目的出发,采用了模块化设计思想.系统包括整流、滤波模块,电流调整模块,检流模块,信号放大调整模块和控制、显示等模块.该系统通过电流负反馈、闭环控制改变基准电压来达到恒流的目的.并采用PID控制算法提高输出电流精度.该系统具有输出恒定、电流范围宽、精度高、低纹波、易控制等特点.

Design on the Numerical Control DC Current Sources Based on the SCM

This design aim is to use simply, modulate conveniently and have friendly interface. The whole design adopts modularization design idea.The system includes rectifier and filter module, current adjustment module, detecting current module, signal amplifier adjustment module, and control and display module. The current negative feedback and closed loop control is used to keep the current constant through changing reference voltage. The PID algorithm has been adopted to improve current precision. Through above mentioned method, this system has the character of output constant, wide current range, high precision, low ripple and easy control.