The motor drive control system of stepping motor show

1 signal distribution

I plant the production of inductor type step motor with two or four phase motor, the two-phase motor with two phase four and phase eight shot two, specific allocation as follows: phase four beats to, the step angle is 180 degrees; two-phase eight shot, the step angle is 0.9 degrees. Four phase motor has two and four phase four beats to AB-BC-CD-DA-AB, step angle is 180 degrees; four phase eight shot AB-B-BC-C-CD-D-AB. (step angle is 0.9 degrees).

2 power amplifier

Power amplifier is the most important part of the drive system. At a certain speed, the torque of the stepping motor depends on its dynamic average current rather than the static current (the current on the sample is static current). The average current is bigger, the electric motor torque is bigger, and the average current is large, which requires the drive system to try to overcome the motor's back EMF. So different occasions to take a different way, so far, the drive way generally have the following: constant pressure, constant pressure series resistance, high and low pressure drive, constant current, fine fraction, etc..

3 pulse signal generation.

Pulse signal is generally produced by the single chip microcomputer or CPU, the duty cycle of the general pulse signal is about 0.3-0.4, the motor speed is higher, the duty cycle is higher.