本文介绍了基于可控电流源的高精度高细分数步进电机细分驱动方法，采用

PwM(脉冲宽度调制)和5阶巴特沃斯低通滤波器实现了双14位精度较高的DAc，用

于控制精密可控电流源的电流输出，使得励磁线圈中流经的电流为稳定的直流，实现

了步进电机低噪声，高稳定度的细分驱动运行。

-This article describes the controlled current source based on the subdivision number of high precision stepping motor driving method, using PwM (pulse width modulation) and 5-order Butterworth low-pass filter to achieve a double-precision 14-bit high DAc, precision controlled current source for controlling the current output, making the current flowing through the coil excitation for the stability of the DC, stepper motor to achieve a low noise, high stability of the sub-drive operation.