Abstract
Electric aircraft that can move in three dimensions would expand our social lives and create new industries. In addition, electric aircraft would lower the energy consumption and emissions of flight. However, electric aircraft require an ultralight weight. Toward this goal, we propose a cage-rotor machine that converts electrical energy between the stator and the rotor via magnetic resonance coupling (MRC). This action induces electromagnetic resonance between the multiphase windings of the stator and the cage bars of the rotor. Electromagnetic resonance coupling technology removes the need for magnetic cores in electrical energy-conversion machines, greatly reducing their weight. In a simulation study, we describe the operating principles and basic MRC-induced characteristics of the proposed cage-type MRC motor. In our analytical results, the MRC motor with no magnetic core converted electromagnetic energy between the stator and the rotor and produced sufficient starting torque with a power factor of 1.0. The relationship between motor torque and resonant frequency was moderated by eddy currents.
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