Research on the High Power Density Electromagnetic Propeller

With the rigorous requirements of high power density, high efficiency, and low noise for propulsion system in many fields, an electromagnetic propeller tends to replace the traditional heat engine propeller. A permanent-magnet synchronous motor used for the electromagnetic propeller is investigated in this paper. The electromagnetic and thermal fields are analyzed with the finite-element method. The influences of different water flow parameters on the winding and permanent-magnet temperatures are discussed and the water cooling system is designed. The power density of approximately 4.18 kW/kg can be obtained for the investigated motor through the electromagnetic and thermal analysis