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首页> 外文期刊>Physica, C. Superconductivity and its applications >Study of superconductor bearings for a 35 kWh superconductor flywheel energy storage system
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Study of superconductor bearings for a 35 kWh superconductor flywheel energy storage system

机译：35 kWh超导飞轮储能系统的超导轴承研究

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摘要

A Superconductor Flywheel Energy Storage system (SFES) is used as an electro-mechanical battery which transforms electrical energy into mechanical energy and vice versa. A 35 kWh SFES using hybrid bearing sets was developed in KEPRI. Mechanical properties of HTS bearings are the critical factors for stability of the flywheel and the main parameter in designing the system. The properties of the HTS bearing were studied. The stiffness and the damping coefficient of the HTS bearing were 346.6 ± 6.7 kN/m and 1255 ± 102 N s/m, respectively. The damping coefficient was twelve times bigger than the estimate value. Therefore, we concluded that there were some external damping mechanisms. Finally, the 35 kWh SFES was test operated up to 4000 rpm. After passing two predicted critical speeds, the amplitude of vibration decreased and reached a stable rotation state.
机译：超导飞轮储能系统（SFES）用作机电电池，可将电能转换为机械能，反之亦然。 KEPRI开发了使用混合轴承组的35 kWh SFES。 HTS轴承的机械性能是飞轮稳定性的关键因素，也是设计系统的主要参数。研究了HTS轴承的性能。 HTS轴承的刚度和阻尼系数分别为346.6±6.7 kN / m和1255±102 N s / m。阻尼系数比估计值大十二倍。因此，我们得出结论，存在一些外部阻尼机制。最后，测试了35 kWh SFES的最高转速为4000 rpm。在超过两个预测的临界速度后，振动幅度减小并达到稳定的旋转状态。

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