Acceleration and deceleration control of stepping motor

Release time：

2022-06-21 00:00

Everyone knows that stepper motors are different from ordinary motors, and they can be used when they are plugged in. Stepper motors can only be controlled by digital signals. When pulses are supplied to the driver, the control system sends too many pulses in a short period of time, that is, the pulse frequency is too high, which will cause the stepper motor to stall.

Acceleration and deceleration of stepper motor

To solve the problem of stepper motor stalling, the method of acceleration and deceleration control must be adopted. When the stepper motor starts, the pulse frequency should be gradually increased, and the pulse frequency should be gradually reduced when decelerating. This is what we often call the "acceleration and deceleration" method.

The speed of the stepper motor is changed according to the change of the input pulse signal. As long as a pulse signal is given to the driver, the stepper motor will rotate a step angle. If the pulse signal changes too fast, the magnetic reaction between the rotor and the stator of the stepper motor will not be able to follow due to the damping effect of the internal back electromotive force. Changes in the electrical signal will result in stalled rotor and lost steps.

Therefore, when the stepper motor starts at high speed, it is necessary to adopt the method of increasing the speed of the pulse frequency, and there must be a deceleration process when it stops, so as to ensure the precise positioning control of the stepper motor. The principle of acceleration and deceleration is the same.