# Working Principle of stepping motor

by：V&T Technologies     2020-01-12
The working principle of stepping motor and the principle of stepping motor are old questions. People often ask this stepping motor manufacturer. What is the working principle of stepping motor? This is not only the elevator. The principle is simple and simple, and it is complicated and complicated. Today, let's take a look at the principle of this motor. You can learn about it through the following text. Stepping Motor is a control motor that converts electrical pulse signals into mechanical angular displacement. The so-called electrical pulse is similar to a pulse. When feeling the pulse beat, it is similar to the high level of the pulse, and when not jumping, it is a low level. This is the electrical pulse signal. The unit of angular displacement is Radian. Stepping motors can be divided into reactive, permanent magnet and hybrid. Each has its own advantages. It is selected according to actual needs. The step angle of the reaction type is small and the precision is high; The moment of permanent magnet type is large. The hybrid has the characteristics of high precision and large torque, but the cost is high. The following is an example of the structure and working principle of the stepping motor. Stepping Motor is mainly composed of two parts: stator and rotor. Stator and rotor are no stranger after learning DC motor. However, the stepping motor takes a three-phase motor as an example, and its stator and rotor have six and four magnetic poles respectively. In the above picture, A and A'Form a phase; B and B'One phase; C and C'For one phase. Therefore, this stepping motor is a three-phase stepping motor. When the stepping motor receives an electrical pulse signal, it will rotate a fixed angle accordingly. This fixed angle is one of the important parameters of the stepping motor, the step angle. In detail, when the stepping motor receives an electrical pulse signal, Phase A is electrified, and the magnetic flux in direction A forms A closed loop through the rotor. If the rotor and the axis direction of the magnetic field have a certain angle, the rotor will be magnetized under the action of the magnetic field to attract the rotor so that the teeth of the rotating and stator will align and stop rotating. That is, Phase A is electrified to make rotor 1, 3 teeth and AA'Alignment; The next pulse signal comes, Phase B is electrified to make rotor 2, 4 teeth and BB'Alignment; After the third pulse signal comes, Phase C is electrified to make rotor 3, 1 teeth and CC'Alignment. This driving mode is a three-phase three-beat driving mode. The following figure: therefore, the stepping motor rotates by the number of pulses, and the corresponding number of pulses is given as many turns. Therefore, the stepping motor can achieve the purpose of accurate positioning; At the same time, the speed and acceleration of the motor rotation can be controlled by controlling the pulse frequency, I . e. how long to give a pulse, thus achieving the purpose of speed regulation. Every time an electric pulse is input, the motor rotates one angle to advance one step. Its output angular displacement is proportional to the number of input pulses and its rotation speed is proportional to the pulse frequency. Change the power-on sequence of windings and control the forward and reverse rotation of the motor. That is, if the power-on sequence of phases A, B and C is positive rotation, then the motor will reverse when the power-on sequence of phases C, B and A is applied. Therefore, the rotation of the stepping motor can be controlled by controlling the number and frequency of pulses and the power-on sequence of each phase winding of the motor. More about stepping motors. Stepper motor driver. Stepping Motor. Closed loop stepping motor. Please pay attention to ruite electromechanical official website. Working Principle of TAG stepping motor
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