Introduction to the advantages and disadvantages of three different control methods of stepper motors

Introduction to the advantages and disadvantages of three different control methods of stepper motors

1. Reactive motor: This kind of motor has a relatively simple structure, low cost and small step angle. At the same time, the dynamic performance is relatively poor and the efficiency is not high. Reliability is difficult to guarantee.

2. Permanent magnet motor: made of permanent magnet materials. The rotor's series is the same as the electronic series, so it has the advantages of very good dynamic performance and large output torque. However, this kind of motor also has disadvantages, that is, the accuracy is relatively poor, and the angle of the steps is relatively large.

3. Hybrid motor: This type of motor combines the advantages of the first two types of motors. However, the structure of this type of motor is relatively complex, difficult to manufacture, and the production cost is relatively high.

Working principle of screw stepper motor:

The screw engages with the nut, and a certain method is used to prevent the relative rotation of the screw and the nut, allowing the screw to move axially. Generally speaking, there are currently two ways to achieve this transformation. The first is to build a rotor with internal threads in the motor, and realize linear motion by meshing the internal threads of the rotor with the screw.

The second type uses the screw as the output shaft of the motor, and the external transmission nut meshes with the screw outside the motor to achieve linear motion. The result is a greatly simplified design that enables lead screw stepper motors to produce precise linear motion in many applications without the need for external mechanical connections.

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