Abstract
We propose a novel machine, which can convert electrical energy between the stator and the rotor using magnetic resonance coupling (MRC) to produce an ultra-lightweight motor. MRC was employed for wireless power transfer in the proposed motor, by enabling energy conversion between the stator and the rotor without magnetic cores, resulting in a reduction in the weight of the motor. In this study, we propose a motor design using MRC and describe its operating principles, starting characteristics, and resonance conditions. We analyzed the proposed MRC motor using magnetic analysis to clarify its essential characteristics and verify the resonance conditions calculated from the equivalent circuit. Our results confirmed that the proposed MRC motor without magnetic cores can convert electrical energy between the stator and the rotor, thereby generating torque. Also, we verified that the resonance condition derived from the equivalent circuit is a valid technique to achieve a resonant state.
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