Principle of discount schrittmotor Stepper motor has the characteristics of simple structure, low manufacturing cost, small rotor rotation inertia, reliable performance, sensitive response, wide range of speed adjustment and so on, and the purpose of positioning control can be achieved through the stepper motor.The working principle of the stepper motor is briefly introduced below, and then the method of driving control of the stepper motor by using the single chip microcomputer is explained.Stepping motor is an actuator that USES the action principle of electromagnet to convert electric pulse signal into angular displacement or linear displacement.The following three - phase reaction stepping motor as an example to explain its working principle.There are 40 teeth evenly distributed on the rotor of the three-phase reaction stepping motor, and the included Angle of the teeth is 9.;Six big teeth (magnetic poles) are evenly distributed on the inner circumference of the stator. On the big tooth surface, there are five small teeth similar to that on the rotor. Two big teeth separated by 180 "are A pair of magnetic poles.The motion of stepping motor is driven by electromagnetic force.Under the action of electromagnetic force, the rotor is forced to push to the position of maximum permeability (or minimum reluctance). The stator teeth are aligned with the rotor teeth and are simultaneously placed in the equilibrium state, which is called the opposite tooth.The stator teeth are not aligned with the rotor teeth.If at a certain moment, when one phase is in the opposite tooth state, the other phases must be in the wrong tooth state.The existence of wrong teeth is a prerequisite for stepping motor rotation.There are three phase three beat and three phase six beat running modes of stepper motor.
