How to choose a stepper motor driver?

Generally speaking, when the stepper motor has been confirmed, we mainly select the driver based on the motor's current, subdivision, and supply voltage.

1. Determine the torque required for the load carried by the motor, and the torque of the selected driver must meet the motor's usage.

2. Determine the rated current of the stepper motor used, and select a driver that matches it. The maximum current of the driver should not be lower than the rated current of the motor. Because the output current of a typical driver can be set within a certain range, if the selected driver's output current cannot meet the rated current of the motor, the motor may not have enough output torque.

3. Determine the working voltage of the motor, the output voltage of the driver must be within the range of motor use, and it is necessary to consider that the stepper motor cannot be overvoltage during emergency braking, that is, to reserve a certain voltage space to prevent back electromotive force.

4. The number of phases must be equal. If the motor is two-phase and the step angle is 1.8 °, the driver must be two-phase. If the motor is three-phase and the step angle is 1.2 °, the driver must also be three-phase.

5. Confirm the maximum speed of the motor, and the maximum speed of the driver cannot be lower than the maximum speed of the motor.
6. Confirm the required subdivision requirements based on the working environment and requirements of the motor. Generally speaking, while ensuring that the output frequency of the controller is sufficiently high, it is advisable to use high subdivision as much as possible, which will result in smoother motor motion and higher control accuracy.

7. The input energy of the driver must meet the energy requirements of the motor's usage scenario.