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When to use a stepper motor ?
When to use a stepper motor ?

Stepper motor is an actuator that converts electrical pulses into angular displacement. In layman's terms: When the stepper driver receives a pulse signal, it drives the stepper motor to rotate a fixed angle in the set direction. You can control the angular displacement by controlling the number of pulses, so as to achieve the purpose of accurate positioning; at the same time, you can control the speed of the motor rotation by controlling the pulse frequency, so you can consider using a stepper motor when accurate positioning or speed control is required.

 

Advantages of stepper motors
1. The rotation angle of the motor is proportional to the number of pulses.
2. The motor has the maximum torque when it stops (when the winding is energized).
3. Since the accuracy of each step is 3% to 5%, and the error of one step will not be accumulated to the next step, it has better position accuracy and movement repeatability.
4. Excellent start-stop and reverse response.
5. Since there are no brushes, the reliability is high, so the life of the motor depends only on the life of the bearing.
6. The response of the motor is only determined by the digital input pulse, so open-loop control can be adopted, which makes the structure of the motor simpler and control the cost.
7. Only connecting the load directly to the shaft of the motor can also rotate synchronously at a very low speed.
8. Since the speed is proportional to the pulse frequency, there is a relatively wide speed range.

 

Disadvantages of stepper motors
1. If improper control is easy to produce resonance.
2. It is difficult to run to a higher speed.
3. Difficult to obtain large torque.
4. There is no advantage in terms of volume and weight, and the energy efficiency is low.
5. When the load is exceeded, the synchronization will be broken, and vibration and noise will be emitted when working at high speed.

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