Do you know the steps for stepper motor selection and how to choose a stepper motor? Dalan motor manufacturers tell you how to choose a stepper motor, which can avoid the trouble caused by improper selection.
1, the choice of stepper motor torque
The holding torque of the stepper motor is similar to what the conventional motor calls "power." Of course, there are essential differences. The physical structure of the stepper motor is completely different from AC and DC motors, and the output power of the motor is variable. Which type of motor is usually selected based on the required torque level (ie the amount of torque required to carry the animal). Generally speaking, the torque is below 0.8Nm, and 20, 28, 35, 39, 42 (the diameter or square of the motor body, unit: mm) is selected; the torque is about 1N.m, and the 57 motor is more suitable. Torque force in several Nm or larger cases, it is necessary to select 86, 110, 130 and other specifications of the stepper motor.
2, step by step motor speed selection
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. That is to say, the stepping motor has a low speed (a few hundred revolutions per minute or less, and its output torque is large), and the torque in the high-speed rotation state (1000 rpm - 9000 rpm) is small. Of course, in some working conditions, high-speed motors are required. It is necessary to measure the coil resistance and inductance of the stepping motor. A motor with a slightly smaller inductance can be selected as a high-speed motor to obtain a larger output torque. On the contrary, in the case of low speed and large torque, it is necessary to select the inductance at ten or tens of mH, and the resistance should be larger.
3. Selection of no-load starting frequency of stepping motor
Stepper motor no-load starting frequency, usually called "empty frequency". This is an important indicator for purchasing a motor. If it is required to start and stop frequently in an instant, and the rotation speed is around 1000 rpm (or higher), "accelerated start" is usually required. If you need to start directly to achieve high speed operation, choose a reactive or permanent magnet motor. The "vacuum frequency" of these motors is relatively high.
4, the number of phase selection of stepper motor
The choice of the number of phases of the stepper motor, this content, many customers have little attention, most of them are purchased casually. In fact, different phases of the motor, the work effect is different. The more the number of phases, the smaller the step angle can be, and the vibration at work is relatively small. In most cases, there are more two-phase motors. In the high-speed and high-torque working environment, it is more practical to select a three-phase stepping motor.
5, for the stepper motor use environment to choose
Special stepper motors are waterproof and oil resistant for use in special applications. For example, underwater robots require a water discharge motor. For special-purpose motors, it is necessary to select them.
6. Can you need special specifications according to your actual situation?
For special specifications of stepper motors, please communicate with us and order them within the scope permitted by the technology. For example, the diameter, length, and extension direction of the shaft.
7. If necessary, further communicate with the technical engineer of the manufacturer to confirm the model.
If necessary, you should first communicate with the technical engineer of the manufacturer to confirm whether the stepper machine you want to select can meet all the requirements of your requirements.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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