4 Things You Need to Know About Phase Loss in Stepper Motors

1. What is the stepper motor phase loss?

The lack of phase of the stepper motor means that during the operation of the stepper motor, the current of a certain phase cannot pass normally, resulting in the failure of the phase to generate a magnetic field, which in turn causes the stepper motor to lose its stepping drive ability.

2. What is the performance of the stepper motor when there is a phase loss?

1) The motor can't start, it's just vibrating;

2) The motor can rotate, but it vibrates greatly, and may rotate forward for a few steps and reverse for a few steps;

Note: The behavior of the stepper motor when it loses phase is somewhat similar to that of stalling, but it can be seen from the cause of the lack of phase that the motor cannot maintain torque when it loses phase. Therefore, it can be judged whether the motor is out of phase or stalled from the perspective of maintaining torque.

3. How to deal with the lack of phase of the stepper motor?

Common reasons for stepper motor phase loss include short circuit in the motor's internal coil, motor driver failure, unstable motor supply voltage, etc. There are many ways to deal with phase loss in stepper motors. Here are some common methods.

1) The internal coil of the motor is short-circuited: replace the coil.

2) The power supply voltage of the motor is unstable. Replace the power supply or install a voltage stabilizer and other equipment.

3) The signal of the controller is abnormal: Check whether the controller is faulty.

4) Drive damage: To determine whether the internal circuit of the drive is damaged, you can do a cross test.

5) Cable or connector is broken: Check whether the cable is disconnected and whether the connector is in poor contact.

6) Wiring error: Check whether the wiring sequence of the motor is correct.

7) The internal coil of the motor is open circuit: If there is no problem with the above checks, the motor should be broken.

4. How to prevent the lack of phase of the stepper motor?

In order to prevent the occurrence of phase loss problem of stepper motor, we can pay attention to the following points in normal use:

1) Avoid using the motor with overload to avoid burning the internal coil of the motor.

2) When using the motor, pay attention to the stability of the power supply and avoid excessively high or low voltage, so as not to affect the normal operation of the motor.

3) Check the status of the motor regularly and handle any abnormalities promptly.

Article source: https://article-realm.com/article/Product-Reviews/50636-4-Things-You-Need-to-Know-About-Phase-Loss-in-Stepper-Motors.html