Calculate PMSM Motor Power

Thread Starter


Joined Oct 15, 2014
Hello Experts,
Is there an accurate way to calculate the electrical motor power without using the applied torque on the Motor?
I am trying to find the efficiency of my inverter design, but for that I need to know the power consumed by the PMSM Motor.

Presently I am using this equation to find the motor power:
Torque = (Power * 9.549)/N, where N is the speed in RPM.

Is there any way I can find the power using the voltage and current readings measured at the voltage terminals?, One major issue here is that the Voltage(Line to Line) is not constant, its a pulsed waveform, mimicking a sine wave(FOC control output). And there is no neutral point(in a delta system).
Browsing through these forums I found this video to calculate power, but even here I am confused as to what value of voltage should I take?