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The difference between stepper motor and ordinary motor

Shenzhen Penghui Technology Co.,Ltd | Updated: Nov 30, 2018

The difference between stepper motor and ordinary motor is mainly in the form of pulse drive (the control system sends out a pulse, which can give the motor a certain rotation angle). Therefore, the stepper motor can be combined with modern digital control technology (especially suitable for mechatronics). product). However, in terms of control accuracy, speed variation range and low speed performance, stepper motors are not as accurate as conventional closed loop DC servo motors. Stepper motors can be used when the accuracy is not particularly high. Stepper motors can be characterized by simple structure, high reliability and low cost. It can even match the performance of DC servo motors if used properly.

 

The stepper motor is an open-loop control element stepper motor assembly that converts an electrical pulse signal into an angular displacement or a linear displacement. In the case of overload, the motor speed and stop position depend only on the pulse signal frequency and the number of pulses, and are not affected by the load change. When the stepper driver receives the pulse signal, it drives the stepper motor at a fixed angle according to the set direction. , called the "step angle", whose rotation is performed step by step based on a fixed angle. The angular displacement can be controlled by controlling the number of pulses to achieve precise positioning. At the same time, by controlling the pulse frequency, the speed and acceleration of the motor rotation can be controlled, thereby achieving the purpose of speed regulation.

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