HighTorque Density PM Machines forHigh Performance Operation

Thispaperlooks atdifferent construction methods andcoilwinding techniques forfractional slot, hightorque density permanent magnetsynchronous machines intended for highperformance aerospace applications. Whilstmechanical gearing isoftenusedtoreducethesizeand massofan electromechanical system byoperating themachine athighspeeds thispapershowsthatbyutilizing machine topologies withlow numberofslots perpoleabetter powerdensity canbeachieved without anymechanical gearing.