Stepper motor factory to take you to understand the structure and working principle of stepper motor.
stepper motor is a special motor for precise control of position and speed. Stepper motor is the biggest feature of its "digital" , for each pulse signal from the microcomputer, stepper motor in its drive to run a fixed angle (referred to as a step) , as shown in the following figure. If a series of pulse stepper motor is received, it will run continuously for a corresponding distance. At the same time, you can control the pulse frequency, directly on the motor speed control. Because stepper motor working principle is easy to learn and use, low cost (relative to Servo) , motor and driver is not easy to damage, very suitable for microcomputer and SCM control, therefore, in recent years in all walks of life in the control equipment has been more and more widely used.
According to the stator winding, there are two-phase, three-phase and five-phase series. The most popular is the two-phase hybrid stepper motor, accounting for more than 97% of the market share, the reason is cost-effective, with a fine drive. The basic step angle of the motor is 1.8 / step. The step angle is reduced to 0.9 after the half-step driver. The step angle can be subdivided up to 256 times (0.007) after the subdivided driver is added. The actual control accuracy is slightly lower due to friction and manufacturing accuracy. The same stepper motor can be equipped with different subdivision of the driver to change the accuracy and effect.
