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Doubt the speed of the stepper motor

Doubt the speed of the stepper motor

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Proportional to the stepper motor speed and pulse frequency, pulse frequency is high stepping motor speed is higher, but the increase of pulse frequency is reached the speed, but the loss of torque.The reason that the torque decreases with the increase of pulse frequency:The two reason for stepping motors is that they lose step:First, the control pulse frequency is high, at this time the rotor acceleration is smaller than the stepper motor stator rotating magnetic field speed.In the stepper motor power supply design, stator coil charging time constant is basically fixed, assuming that the time constant is 0.02S (0.02S is charged to the maximum value of 63%), if the pulse period of stepper motor can be greater than 0.04S (50% duty cycle, frequency of less than 25HZ), the stator coil can be obtained enough energy to produce enough torque to drive the rotor. If the pulse frequency is too high, such as 50HZ (50% duty cycle, pulse cycle is greater than 0.02S), the charging time of stator coil was 0.01S, charging time is less than half of the torque generated is much less, the rotor can not keep up the speed of the stator rotating magnetic field, every step backward in the equilibrium position should arrive, and from the equilibrium position is more and more far. The accumulated result is a step out of stepOf course, the frequency of 50HZ is too small, this example is for illustration, said a number of optional solutions: 1, reduce the frequency of the pulse, don't think that trouble, debugging the stepper motor pulse frequency adjustment process is most
Speed: 35, 39, 42, the three series of stepper motors due to small inertia, torque is small, so the speed is generally 300-500 rpm, 42 can reach about 600. 57, 86, 110 of the three motor speed up to 2000 rpm (just motor idling, without any load, because the motor at this speed almost no effort, one hand grasping stop), the effective speed of the motor has the strength under the condition of the three models of the motor speed is almost at about 600-1200.Our company's motor is the stepper motor of the competition. I usually do the test, and the speed is the same as that mentioned above
Hello, there are many kinds of stepper motors, which are really different about speed. For example, Germany's 100 step stepper motor, its rated speed of 3500 rpm / cent, do not believe, but the price is also high, much higher than the price of domestic servo motors, 100 grams is grasping quality, regardless of price.

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