What is a stepper motor? How to build?

Diagram of the working principle of the stepper motor.

There are three pairs of magnetic poles A, B and C on the stator of the motor, and there are coils around the magnetic poles, which are called phase A, phase B and phase C respectively, and the rotor is an iron core with teeth, and this kind of stepper motor is called a three-phase stepper motor. If the first circle is passed by direct current, a magnetic field will be generated, when the coils of the three poles of A, B and C are electrified in turn, then the three pairs of magnetic poles of A, B and C will take turns to generate a magnetic field to attract the rotor to rotate. First of all, there is a phase coil (set to phase A) to be energized, then the two teeth of the rotor are attracted by the magnetic pole A, and the rotor stays at the position of Figure 5-5a.

Then, phase A is de-energized and phase 6 is energized, then the magnetic field of magnetic pole A disappears, and magnetic pole B produces a magnetic field, and the magnetic field summoned by the magnetic pole attracts the two teeth closest to it and stops at the position of Figure B, and then the rotor turns 30° counterclockwise. Then phase B is powered off, and phase C is energized. By the same token, the rotor turns 30° counterclockwise and stops at the position of Figure C.

If phase A is energized and phase C is disconnected, then the rotor is reversed by another 30° so that the magnetic field of pole A attracts the two teeth. Each phase wheel of the stator is electrified, and the rotor turns one tooth at a time. Press a b c a b c a b c a like this ....The sequential wheel is energized, and the stepper motor rotates in a counterclockwise direction step by step.

Every time the energized coil is converted, the stepper motor rotates 30°, and we call the angle of each step of the stepper motor as the step angle. If the sequence of energizing coil conversion of stepper motor is reversed, it is replaced by a c b a c b ...., the stepper motor will rotate in a clockwise direction, so to change the rotation direction of the stepper motor can be done when any phase is energized.

Summary. Hello, stepper motor is a special DC brushless motor, need an upper driver, stepper motor is not directly connected to the power supply, through the driver to connect to the power, the general stepper motor driver also needs a high-level controller, through the controller pulse and programming to control the stepper motor, the controller can be dedicated, can also be a general PLC, etc., but if the stepper motor only needs simple repetitive motion, it can also only use the driver with spontaneous pulse to control, and do not need the upper controller.

How to use a stepper motor.

Hello, I am sorting out the answer according to your question, please wait a while Hello, stepper motor is a special brushless DC motor, which needs an upper driver, the stepper motor is not directly connected to the power supply, it is connected to the power through the driver, the general stepper motor driver also needs a high-level controller, the stepper motor is controlled by the controller pulse and programming, the controller can be dedicated, it can also be a general PLC, etc., but if the stepper motor only needs simple repetitive motion, It can also be controlled using only a driver with spontaneous pulses without the need for a higher-level controller.

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Hello, what's the problem!