CHANGZHOU SMILA AUTOMATION TECHNOLOGY CO., LTD

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Jackie Huang / Rachel lu

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Company News

General knowledge of the stepper motor

2015/10/23

 Stepping motor is a kind of electrical pulses into angular displacement of the implementing agencies. When stepping drive receives a pulse signal, it drives stepper motor rotate in the direction set by a fixed point of view, it is the rotation at a fixed angle step by step operation. The number of pulses to control the amount of angular displacement through the control, so as 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. Special motor stepper motor control can be used as a characteristic, use its no accumulation of error, is widely used in all kinds of open loop control.

         Some of the characteristic of step motor:

1, in general the accuracy of stepper motor step angle 3-5%, and does not accumulate.

2, stepper motor appearance allows: 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 C more than 130, some even as high as 200 degrees Celsius, so the stepping motor surface temperature at 80-90 degrees Celsius completely normal.

3, the stepper motor torque decreases with the increase of speed, when the stepper motor rotates, the electrical inductance of the winding will form a reverse electromotive force; the higher the frequency, the greater the reverse emf. Under the influence of it, the motor with frequency (or speed) increase and the phase current is reduced, resulting in lower torque.

4, can be normal operation of stepper motor at low speed, but if more than a certain speed will not start, and accompanied by howling.