２軸スピン球へのエネルギー貯蔵に関する解析および実験

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  • Analysis and Experiment of Energy Storage to 2-Axis Spinning Sphere

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Concept of kinetic energy storage system with 2-axis spinning sphere is described to improve energy density of mechanical battery, i.e., flywheel energy storage system. Fundamental analysis with finite element method and the first experiment of 2-axis spinning sphere are carried out to clarify the proposed concept. Analytical and experimental results verify that the 2-axis spin makes it possible to storage kinetic energy by a factor of 2 over the conventional 1-axis rotation for the same rotation speed. However, it is shown that the mechanical losses of the prototype system with a geared-type 2-axis spin mechanism is approximately twice as large as the 1-axis rotation sphere. Exploring a novel 2-axis spin mechanism with the least mechanical losses is a critical issue to realize the concept.

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