Control of acceleration/deceleration of stepper motors

Update:28 Dec 2020
Summary:

As you know, stepping motors are different from convent […]

As you know, stepping motors are different from conventional motors and can be operated by plugging them in. Stepping motors can only be controlled by digital signals. When pulses are supplied to the driver, the control system sends too many pulses in too short a time. In other words, the pulse frequency is too high and the stepper motor stops working.

Acceleration / deceleration of stepper motor

The acceleration and deceleration control methods must be used to solve the problem of the starter motor. Stepping motors are required to provide a gradual pulse frequency with a gradual increase at the start and a gradual decrease when decelerating. This is what we often call the method. "Acceleration and deceleration"

The speed of the stepping motor will change according to the input pulse signal. As long as a pulse signal is sent to the driver, the stepping motor rotates the step angle. If the pulse signal changes too quickly, the internal counter current will be attenuated and the stepper motor will not follow the magnetic reaction between the rotor and the stator. A change in electrical signals can cause stalls and steps.

Therefore, if the stepping motor is started at high speed, a method of increasing the pulse frequency is required, and there is a deceleration process when stopped to ensure correct control of the position of the stepping motor. The principle of acceleration and deceleration is the same.

The acceleration and deceleration control methods must be used to solve the problem of the starter motor. Stepping motors must provide a gradual increase in pulse frequency at the start and a gradual decrease in pulse frequency as it decelerates. This is what we often call the method. "Acceleration and deceleration"

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