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Stepper Motor Stepper motor classification
Stepper motor classification
The reaction step is generally two-phase, torque and volume is small, the stepping angle is generally 7.5 degrees or 1.5 degrees; permanent magnet step is generally three-phase, can achieve large torque output, step angle is generally 1.5 Degrees, but the noise and vibration are great. In Europe and the United States and other developed countries 80 years have been eliminated; hybrid step is mixed with permanent magnet and the advantages of reactive. It is divided into two-phase, three-phase and five-phase: two-step stepping angle is generally 1.8 degrees and five-step stepping angle is generally 0.72 degrees, hybrid stepper motor with the number of (number of windings) Step angle reduction, accuracy, this stepper motor is the most widely used. How to overcome the shortcomings of stepper motors
Stepping motor vibration and noise at low speed is its inherent shortcomings, generally can be used to overcome the following:
A. If the stepper motor is just working in the resonant area, the resonant area can be avoided by changing the mechanical transmission such as the reduction ratio;
B. The use of subdivision function with the drive, which is the most commonly used, the easiest way;
C. Stepping motors with smaller angles, such as three-phase or five-phase stepping motors;
D. AC servo motor, almost completely overcome the vibration and noise, but the cost is higher;
E. In the motor shaft plus magnetic damper, the market has this product, but the mechanical structure changes greatly.
Stepper motor basic introduction
Stepping motor as an implementation of components, mechanical and electrical integration is one of the key products, widely used in a variety of automated control systems. With the development of microelectronics and computer technology, stepper motor demand is increasing, in all national economic areas have applications.
The stepper motor is an actuator that converts electrical pulses into angular displacements. It is popular to say that when the stepper driver receives a pulse signal, it drives the stepper motor to rotate a fixed angle (ie, the stepping angle) in the set direction. Can control the number of pulses to control the angular displacement, so as to achieve the purpose of accurate positioning; at the same time by controlling the pulse frequency to control the motor speed and acceleration, so as to achieve the purpose of speed.
Stepper motors are commonly used in digital control systems with high accuracy and reliable operation. Such as the use of position detection and speed feedback, can also achieve closed-loop control. Stepper motors are now widely used in digital control systems, such as digital-to-analog conversion devices, CNC machine tools, computer peripherals, automatic recorders, watches and clocks, etc., and in industrial automation production lines, printing equipment, etc. are also used.
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