A frequency response oriented approach to rotor losses evaluation in converter operated synchronous machines

The distorted waveforms of stator currents in converter fed sunchronous machines give rise to additional rotor losses. The knowledge of these losses in advance is important as far as both machine design and performance are concerned. In the paper, an approach to rotor losses evaluation is proposed based on the operational transfer functions of the machine. Results are presented with reference to a variable frequency synchronous motor drive.