When choosing a motor, how to choose power and torque?——Part two

(Part two)

Also. The most commonly used is the analogy method to select the power of the motor. The so-called analogy. It is compared with the power of the electric motor used in similar production machinery.

The specific method is: to understand the power motor used by the similar production machinery of this unit or other nearby units, and then select a motor of similar power to conduct a test run. The purpose of the test run is to verify that the selected motor matches the production machine.

The verification method is: make the motor drive the production machinery to run, measure the working current of the motor with a clamp ammeter, and compare the measured current with the rated current marked on the motor nameplate. If the actual working current of the electric power machine is not much different from the rated current marked on the spleen. It indicates that the power of the selected motor is suitable. If the actual working current of the motor is about 70% lower than the rated current marked on the nameplate. It indicates that the power of the motor is too large, and the motor with smaller power should be replaced. If the measured working current of the motor is more than 40% larger than the rated current marked on the nameplate. It indicates that the power of the motor is too small, and the motor with a larger power should be replaced.

It is suitable for the mutual conduction of the relationship between the rated power, rated speed and rated torque of the servo motor, but the actual rated torque value should be based on the actual measurement. Because of the energy conversion efficiency problem, the basic values are generally the same, and there will be subtle decrease. . .