How do I select a stepper motor driver?

Stepper motor is a motor that converts electrical pulse signals into corresponding angular or linear displacement. As a special control motor, it cannot be directly connected to DC or AC power to work, must use a dedicated drive power - stepper motor driver. There are many types of stepper motor drivers, such as bus drivers, pulse direction drivers, etc. So, how to choose stepper motor drive?

Generally speaking, after determining the stepper motor, we mainly choose the stepper motor driver based on the current, subdivision and supply voltage of the motor.

1. Determine the torque required by the motor load.

The torque of the stepper motor driver must meet the requirements of the motor.

2. Determine the rated current of the stepper motor used, and select the maximum current matching the driver, which should not be lower than the rated voltage of the motor.

Since the output current of a general driver can be set within a certain range, if the output voltage of the selected driver does not meet the rated current of the motor, the output torque of the motor may be insufficient.

3. Determine the working voltage of the motor.

The output voltage of the stepper motor driver should be within the service range of the motor, and should take into account that the stepper motor will not appear overvoltage during sudden braking, that is, a certain voltage space should be reserved to prevent back electromotive force.

4. The number of phases must be equal. If the motor is two-phase, the step Angle is 1.8°.

Stepper motor drivers must be two phase. If the motor is three-phase, the step Angle is 1.2°. It has to be three-phase.

5. Confirm the maximum speed of the motor.

The maximum speed of the stepper motor driver must not be lower than the maximum speed of the motor.