Knowledge of the introduction of stepper motors

Data:2016-09-28 14:35:07 Hits:

Stepping motor is a kind of electrical pulses into angular displacement of the implementing agencies, is when the stepper driver receives a pulse signal, it drives stepper motor rotate in the direction set by a fixed point of view (and the step angle), the number of pulses to control the angular displacement through the control, to to achieve the purpose of accurate positioning; also can control the pulse frequency to control motor rotation speed and acceleration, so as to achieve the purpose of speed.

  Stepper motor is divided into three types: permanent magnet (PM), reactive (VR) and mixed type (HB)

1, permanent magnet stepper for general two-phase, torque and small volume, the step angle is 7.5 degree or 15 degree;
2, the reaction step is generally phase, can realize the large output torque, step angle is 1.5 degrees, but the noise and vibration are great;
3, hybrid stepping mean the combination of advantages of permanent magnet type and reaction type, it is divided into two phase and five phase, two-phase stepper angle is 1.8 degrees and five phase stepper angle is 0.72 degrees, the stepper motor is the most widely.
 

     Stepper motor temperature is too high will first make the motor magnetic material demagnetization, resulting in lower torque and loss, so the highest temperature of motor appearance allows should depend on the different motor demagnetization magnetic materials; generally speaking, demagnetization point magnetic material in 130 degrees Celsius above, some even as high as 200 degrees Celsius stepping motor, so the surface temperature at 80-90 degrees Celsius completely normal.


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