No electric induction motor is a device that works with electromagnetism and, therefore, need the inductive current so that its magnetization occurs.

When the electric induction motor works without load, the power factor is certainly very low and the values will be only 0.15. Now the load, the electric motor will have its power increased and so will achieve the maximum value at full load.

When operating at low speed (but a greater number of poles in operation), the lower the power factor. When the speed is the same timing, power and increases its power too.

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To choose an electric motor, the motor power should be adequate when it will be used. The electric motor must be chosen when the charging is more than 50% and preferably it is greater than 75%.