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Abstract—The torque produced by a synchronous reluctance\ud machine (including the permanent-magnet-assisted machine) is\ud studied analytically, with the aim of pointing out the effect of the\ud position of the flux barriers on the torque ripple. It is verified that\ud the position of the flux-barrier ends highly influences the torque\ud waveform. With the aim of reducing torque harmonic contents,\ud a new strategy is proposed based on the choice of couples of flux\ud barriers of different shapes. The flux-barrier geometry is chosen\ud so as to obtain a compensation between the torque harmonics\ud produced by each couple. Experimental results on two prototypes\ud confirm the analytical prediction

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The torque behavior of a synchronous reluctance machine (including the PM assisted configuration) is studied analytically, to the aim of individuating the position of the flux-barrier ends that minimizes the torque ripple. A new strategy is proposed based on a suitable choice of these positions together with the combinations of rotor laminations of different type. This allows the torque harmonics to be compensated and a smooth torque to be achieve

The torque produced by a synchronous reluctance machine (including the PM assisted configuration) is studied analytically, to the aim of characterizing the effect of the position of the flux-barriers on the torque ripple. It is verified that the position of the flux-barrier ends highly influences the torque waveform. To the aim of reducing the torque harmonic contents, a new strategy is proposed based on the choice of couples of flux-barriers of different shapes. The couples of the flux-barriers are chosen so as to obtain compensation between the torque harmonics produced by each couple of them. Experimental results on two prototypes confirm the analytical predictio