What is the difference between open loop and closed loop of stepper motor

Stepper motors can be divided into open-loop stepper motors and closed-loop stepper motors. So the question is, what is the difference between an open-loop stepper motor and a closed-loop stepper motor?

The open-loop stepper motor can be easily understood as sending an ordinary letter before the other party, just let the other party execute the content. No feedback.

The closed-loop stepper motor is equivalent to sending a registered letter, which needs to be executed by the other party and reported to you. Have feedback.

That is to say, the fundamental difference between an open-loop stepper motor and a closed-loop stepper motor is whether it will feedback the current running status signal.

The open-loop stepper motor has no feedback signal and only executes in sequence. On the contrary, the closed-loop stepper motor feedback signal, according to the signal, the stepper motor driver takes corresponding action measures or signal feedback to the PLC, and the PLC decides the next program processing.

Sometimes, some people refer to closed-loop stepper motors as hybrid servo motors. Next, analyze the advantages of closed-loop stepper motors.

Advantages of closed-loop stepper motors, closed-loop control improves the torque-frequency characteristics.

The second advantage of a closed-loop stepper motor is that under closed-loop control, the output power/torque curve can be improved, and the current value is determined by the motor load. Therefore, even in the low speed range, the current can be fully converted into torque.

The second advantage of the closed-loop stepper motor is that by using the closed-loop control, the stepper motor can be automatically and effectively accelerated and decelerated.

Stepper motors can be divided into open-loop stepper motors and closed-loop stepper motors. So the question is, what is the difference between an open-loop stepper motor and a closed-loop stepper motor?

The open-loop stepper motor can be easily understood as sending an ordinary letter before the other party, just let the other party execute the content. No feedback.

The closed-loop stepper motor is equivalent to sending a registered letter, which needs to be executed by the other party and reported to you. Have feedback.