This paper presents a comparison between a Double Excitation Synchronous Machine (DESM) and a Permanent Magnet Synchronous Machine (PMSM). Optimal designs of both machine types are compared regarding different constant power speed ranges (CPSR). The optimization objectives are to minimize the active material cost and losses. Results show that the DESM is more advantageous over the PMSM counterpart in loss saving at a wide CPSR, and the PMSM is capable of reducing the machine cost.
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