Some features of the stepper motor:
1. The accuracy of a general stepper motor is 3-5% of the step angle and does not accumulate.
2. The maximum temperature allowed by the stepper motor appearance.
If the temperature of the stepper motor is too high, the magnetic material of the motor will be demagnetized firstly, resulting in torque drop and even out of step. Therefore, the maximum allowable temperature of the motor surface should depend on the demagnetization point of the magnetic material of different motors; in general, the demagnetization of the magnetic material The points are all above 130 degrees Celsius, and some even up to 200 degrees Celsius, so the external temperature of the stepper motor is completely normal at 80-90 degrees Celsius.
3. The torque of the stepper motor will decrease as the speed increases.
When the stepper motor rotates, the inductance of each phase winding of the motor will form a back electromotive force; the higher the frequency, the larger the back electromotive force. Under its action, the motor decreases with increasing frequency (or speed), resulting in a drop in torque.
4. The stepper motor can run normally at low speed, but if it is higher than a certain speed, it cannot be started, accompanied by howling.
The stepping motor has a technical parameter: the no-load starting frequency, that is, the pulse frequency that the stepping motor can start normally under no-load conditions. If the pulse frequency is higher than this value, the motor cannot start normally, and lost or blocked may occur. In the case of load, the starting frequency should be lower. If the motor is to be rotated at a high speed, the pulse frequency should have an acceleration process, that is, the starting frequency is low, and then rise to a desired high frequency (the motor speed is increased from a low speed to a high speed) at a certain acceleration.
With its remarkable features, stepper motors play a major role in the digital manufacturing era. With the development of different digital technologies and the improvement of the technology of stepping motors, stepping motors will be applied in more fields.
