 # What is the difference between the rated power and the actual power of the motor?

Update:14 Feb 2020
Summary:

The difference between the rated power and the a […]

The difference between the rated power and the actual power of the motor means that the motor is in the best working condition under this data. The rated voltage is fixed and the allowable deviation is 10%.

Taichuang's actual power and actual current vary with the size of the load being dragged;

If the load to be dragged is large, the actual power and actual current are large; if the load to be dragged is small, the actual power and actual current are small.

The rated power of the motor is not equal to the load power. Because when selecting the motor capacity, the future aging of the machine being dragged must be considered, so a margin must be added to the mechanical load power. The power level of the motor is not exactly equal to the calculated power of the machine, but the power level of the motor must be increased up, so the power of the motor is generally greater than that of the driven machine.

If the actual power and actual current are greater than the rated power and the rated current, the motor will be overheated and burned; The actual power and the actual current are less than the rated power and the rated current, which will cause material waste.

Their relationship is:

Rated power = rated current IN * rated voltage UN * root 3 * power factor

Actual power = actual current IN * actual voltage UN * root 3 * power factor