Time-Harmonic Analysis of Synchronous Motors

This paper develops steady-state time harmonic expressions for synchronous motors. Using these expressions, the current harmonics and waveforms for motors supplied by variable-frequency solid-state power converters can be predicted. Such waveforms are particularly useful in the design of inverter commutation circuits. The models include the effects of saliency and dampers. Experimental results are included to confirm the analysis and show its limitations.