What kind of machine can be divided into the drive motor of the wire cutting machine?
The middle wire cutting drive unit includes two parts of the driving device and the motor. Therefore, the selection of the driving unit mainly lies in the selection of the driving device, because the motor is a common component, and the performance difference exists only in different manufacturers and different models.
The drive motor can be mainly divided into three types: reactive step drive motor, hybrid (also called permanent magnet reaction) step drive motor and servo drive motor. The rotor of the reactive stepping drive motor has no winding, and the reaction torque generated by the excited stator winding realizes stepping operation. The rotor of the hybrid stepping motor uses permanent magnets, and the electromagnetic torque generated by the excitation and permanent magnets is stepped. The stepping motor is controlled by the pulse. The rotation direction of the motor can be changed by changing the order of energization. Changing the frequency of the pulse can change the rotation speed of the motor. Stepper motors have a certain step accuracy and no cumulative error. However, the efficiency of the stepping motor is low, the ability to drag the load is not large, the pulse equivalent cannot be too large, and the speed adjustment range is not large. At present, the stepping motor can be divided into two phases, three phases, and five equals, and a five-phase stepping motor is usually used. In the past, stepper motors accounted for a large market, but are gradually being replaced by servo motors.
At present, the commonly used servo motor is an AC servo motor. A photoelectric encoder is installed at the shaft end of the motor, and the rotor angle is used for frequency conversion control. From the lowest speed to the highest speed, the servo motor can run smoothly with low torque ripple. The servo motor has a long overload capability, a small moment of inertia and a large stall torque. The servo motor has a small starting frequency and can quickly accelerate from the lowest speed to the rated speed.
