What is the step motor? What is it used for?
In the case of the overload, motor speed, stop position depends only on the pulse signal frequency and pulse number, and not affected by load change, when the stepper driver receives a pulse signal, it is driving a stepper motor according to set the direction of a fixed Angle, known as the "step Angle", its rotation is based on the Angle of the fixed step by step. It can control the amount of angular displacement by controlling the number of pulses, so as to achieve accurate positioning. At the same time, the speed and acceleration of the motor can be controlled by controlling the pulse frequency to achieve the goal of speed adjustment.
The operation of the stepping motor to have a electronic device drivers, the device is stepper motor drives, it is the control system of the pulse signal into angular displacement of stepper motor, or: each send a pulse signal control system, through the drive actuator makes a step away from the Angle of stepping motor rotation. That is, the speed of the step motor is proportional to the frequency of the pulse. The speed of the motor is controlled by the frequency of the pulse signals. The precise positioning of the motor can be obtained by controlling the number of step pulses.
Stepper motor is a kind of as control with special motor, its rotation is a fixed Angle (called interval Angle) running step by step, at the same time, its characteristic is no accumulation error, so widely used in all kinds of open loop control. Stepping motor is an actuator that converts electrical impulses into angular displacement. Popular point: when the stepper driver receives a pulse signal, it is driving a stepper motor according to set the direction of a fixed point (i.e., step Angle). It can control the amount of angular displacement by controlling the number of pulses, so as to achieve accurate positioning. At the same time, you can control the speed and acceleration of the motor by controlling the pulse frequency. Therefore, it is possible to consider using the step motor when necessary for accurate positioning or speed control. The kinds of stepping motor stepper motor according to electromagnetic design generally divided into: permanent magnet (PM), reactive (VR) and hybrid (HB), at the same time, according to the coil excitation of different design, stepper motor can be divided into two phase, three-phase and five phase; According to the design of the drive, stepper motor has the rotational step, the linear step, and the reduction gear with the reduction gear.
The permanent magnet step is generally two phases, the torque and volume are smaller, and the step distance is usually 7.5 degrees or 15 degrees. Hybrid step refers to the advantage of mixing permanent magnet and reactive type. It is divided into two phases, four phases and five phases: the two phases are normally 1.8 degrees and the five-phase Angle is 0.72 degrees. This step is the most widely used. The phase number of the step motor is the number of coils within the motor, and the two phase, three phases, four phases and five phase stepping motors are commonly used. The number of the motor is different, the Angle of the step is different, the Angle of the step distance of the second phase motor is 1.8 degrees, the third phase is 1.5 degrees, and the fifth phase is 0.72 degrees. In the absence of a breakdown driver, the user mainly selects the steps of different phases to meet the requirement of the step Angle. If you use a subdivision drive, the number of phases becomes meaningless, and the user simply changes the score on the drive to change the step Angle.
