Hi,
Insufficient information.
Incomplete simulation.
How does your PWM work?
A simple switch ON/OFF, without voltage clamp? With voltage clamp - what clamp voltage?
Or a true half bridge with output voltage levels: V1, 0V?
Which mode? DCM? CCM?
A motor is no simple inductance.
A stalled motor comes close to it, but i motor that does not move makes nit much sense.
A running motor ... when you switch OFF (switch = high impedance) will cause a short negative pulse (like a pure inductance) followed by a positive EMF voltage proportional to RPM.
Then what measurement method do you use?
Average or RMS?
A square wave with clean switching to two levels: V1 and 0V....will result in:
* V_avg= V1 x duty_cycle (average method)
* V_ rms = V1 x sqrt(duty_cycle)
You see it depends a lot on the details ... and thus can't be answered generally.
Klaus