This study focuses on optimizing a high-speed multiphase electrical machine intended for aerospace power generation (2.25 MW/15,000 rpm). The proposed approach relies on analytical modeling to capture both electromagnetic and thermal phenomena. A direct stator winding cooling strategy, based on oil circulation within the slots and end-windings, is investigated. The objective is to minimize the mass of the active components while satisfying specific design constraints. To ensure fault tolerance, the influence of the number of phases and the winding distribution on machine performance is analyzed. Particular attention is devoted to the machine's ability to withstand short-circuit currents.
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