A stepper motor is a kind of motor that converts electrical pulse signals into corresponding angular or linear displacements. Each input pulse signal, the rotor will rotate an angle or a step forward, the output of the angular displacement or line displacement is proportional to the number of input pulses, the speed is proportional to the pulse frequency. Therefore, the stepper motor is also known as pulse motor.
China's stepper motor in the early 1970s began to start, the mid-1970s to the mid-1980s for the finished product development stage, new varieties and high-performance motors continue to be developed, at present, with the development of science and technology, in particular, the development of permanent magnet materials, semiconductor technology, computer technology, so that stepper motors in many fields have been widely used.
The main structure of the stepper motor
1, stepper motor acceleration and deceleration process control technology
Because of the wide application of stepper motors, the control of stepper motors is also more and more research, in the start or accelerate if the stepping pulse changes too quickly, the rotor due to inertia and follow the changes in the electrical signal, resulting in blocking or out of step in the stop or deceleration due to the same reason may produce overstep. In stopping or decelerating for the same reason, overstepping may occur.
2, stepper motor subdivision drive control
stepping motor due to its own manufacturing process limitations, such as the size of the step angle by the number of rotor teeth and the number of running beats, but the number of rotor teeth and the number of running beats is limited, so the stepping angle of stepping motors are generally larger and is fixed, stepping resolution is low, lack of flexibility, vibration in the low-frequency operation, the noise is higher than other micro-motors, making the physical device, the physical device, and the physical device, and the physical device. micromotors, making the physical device susceptible to fatigue or damage.
These shortcomings make the stepper motor can only be applied in some of the less demanding occasions, for the more demanding occasions, can only be taken to the closed-loop control, increasing the complexity of the system, these shortcomings seriously limit the effective use of stepper motors as an excellent open-loop control components. Subdivision drive technology effectively overcomes these drawbacks to a certain extent.
Reference to the above: Baidu Encyclopedia-Stepping Motor