I am working on a Scalar VFD, to drive a 2 pole, 400V, 50Hz machine (110kW) with machine parameters taken directly from a pre-existing MATLAB model (Image 1)
When measuring the phase currents within the stator windings of the IM I am encountering imbalance between each phase. There is both a DC offset and change in Amplitude between each phase. In a no load condition (mechanical connection of IM is attached directly to the rotational reference) there is an electromagnetic torque produced by the motor (Image 2)
Any guidance in solving this problem would be greatly appreciated!