With the development of microelectronics and computer technology, the demand for stepping motors is increasing day by day.
However, as an actuator, stepping motor is one of the key products of Mechatronics. It is widely used in various automatic control systems and in various fields of national economy.
Stepping motor is an actuator that converts electrical pulse into angular displacement.
When the stepping driver receives a pulse signal, it drives the stepping motor to rotate a fixed angle (Called'Step angle')
Its rotation runs step by step at a fixed angle.
The angular displacement can be controlled by controlling the number of pulses, thus achieving the purpose of accurate positioning;
At the same time, the speed and acceleration of the motor can be controlled by controlling the pulse frequency, thus achieving the purpose of speed regulation.
Stepping motor can be used as a special motor for control, and it has no accumulated error (Precision is 100%)It is widely used in various open-loop control.
The commonly used stepping motors include reactive stepping motors (VR)Permanent magnet stepping motor (PM)Hybrid Stepping Motor (HB)And single-phase stepping motor, etc.
Permanent magnet stepping motors are generally two-phase, with small torque and volume, and the stepping angle is generally 7. 5%. 5 degrees or 15 degrees.
Reactive stepping motors are generally three-phase, which can realize large torque output, and the stepping angle is generally 1. 5 degrees, but the noise and vibration are very large.
The rotor magnetic route of the reactive stepping motor is made of soft magnetic material, and the stator has multi-phase excitation windings, which generate torque by changing the magnetic conductivity.
Hybrid Stepping Motor refers to the advantages of permanent magnet and reactive type.
It is divided into two phases and five phases: the stepping angle of the two phases is generally 1. 8 degrees and the five-phase step angle is generally 0. 72 degrees. This stepping motor is the most widely used.
After decades of development, China's stepping motor manufacturing industry has achieved great development and the level of production technology has also been greatly improved.
From the perspective of the future development of stepping motor industry, energy-saving motors and motors with high power density, wide speed regulation range and low speed and large torque in DC machines are still the development direction. Learn more about ruite electromechanical.
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