Stepper motor driver requirements (1)Can provide current increase and decrease of speed faster, and made the current waveform as far as possible close to the rectangle. Circulation loop for release during cut-off current, in order to reduce the winding at the ends of the counter electromotive force, speed up the current attenuation. (2)With high power and efficiency. stepper motor drives, it is to make the control system of the pulse signal into angular displacement of stepper motor, in other words, each send a pulse signal control system, through the drive will make the stepping motor rotate a step torque Angle. That is to say, step motor speed is proportional to the pulse signal frequency. So the control step pulse signal frequency, can be accurate on the motor speed control: control the number of step pulse, can accurate positioning on the motor.
