How to calculate the electrical power of a BLDC motor?

Thread Starter


Joined Aug 12, 2022
I used a current sensor to measure the current of one of the motor phase line (Iphase or Iline), and use a voltage sensor to measure the voltage between two motor phase lines (Vline-line). With these two values, how do I calculate the electrical power of the BLDC motor?


Joined Jan 23, 2018
Depending on how accurate you want to be, it might be close enough to measure the input power. And if you know the efficiency of the driver circuit you should be able to come close.