Design optimization of round-rotor synchronous machines operating on non-sinusoidal voltages

This paper presents a simplified method for optimizing some design parameters of round-rotor synchronous machines fed by static power converters. The proposed method can be applied to an arbitrary voltage waveform, which is imposed by the power converter. It is based on a description of the machine and converter by means of space vectors, allowing the inclusion of the effects of higher space and time harmonics. It aims to optimize the steady state peak torque keeping the same amount of losses in the machine and converter. The method was successfully implemented in a MATHCAD file taking as example a machine of 10 kW fed by an inverter with six pulse voltage waveform. The obtained design curves as well other results are presented and commented upon at the end. The method has proved helpful in choosing the best design parameters for machines intended to be fed by inverters