### How to calculate the power of three-phase AC motor?

Date：2023-10-08 Author：XINDA MOTOR

# First of all, we need to understand that the power calculation formula of a sinusoidal AC circuit is P=UIcosφ (cosφ is the power factor).

# Secondly, for inductive loads and capacitive loads, there is a phase difference between voltage and current. (For pure inductive loads, the voltage leads the current by 90 degrees, and for pure capacitive loads, the current leads the voltage by 90 degrees.) φ is not 0, and cosφ is not equal to 1. Therefore, it cannot be calculated according to P=UI.