About the selection of stepper motor torque and speed

Source:Industry News     Release time:2022-06-11     Clicks:     Popular:Reduction motor manufacturer

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1. Selection of stepper motor torque


The holding torque of a stepper motor is similar to what is called "power" of a conventional motor. Of course, there are also essential differences. The physical structure of stepper motors is completely different from AC and DC motors, and the output power of the motor is variable. Which type of motor is usually chosen based on the required torque (that is, the torque of the object being driven). Roughly speaking, if the torque is below 0.8N.m, choose 20, 28, 35, 39, 42 (diameter or right angle of the motor body, unit: mm); if the torque is around 1N.m, it is more appropriate to choose a 57 motor. When the torque is above a few N.m, you need to choose a stepper motor with specifications such as 86, 110, and 130.


2. Selection of stepper motor speed


Special consideration should also be given to the speed of the motor. Because the output torque of the motor is inversely proportional to the speed. In other words, the torque of the stepper motor at low speed (less than a few hundred revolutions per minute, its output torque is very large), but the torque at high speed (1000 rpm-9000 rpm) is very small. Of course, some working conditions require high-speed motors, so the coil resistance, inductance and other indicators of the stepper motor need to be measured. Choose a motor with a slightly smaller inductance. As a high-speed motor, you can get a larger output torque. On the contrary, when low speed and high torque are required, it is best to choose an inductor with an inductance of ten or tens of mH and a larger resistance.


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