Design and research of magnetically levitated testbed with composite superconductor bearing for micro thrust measurement

A high temperature superconducting(HTS)magnetically levitated testbed has been developed for the steady thrust measurement of miniature ion electrospray thruster.The structure of the testbed mainly consists of an HTS composite bearing,a magnetic shielding plate,an active electromagnetic brake and a laser displacement sensor.The steady thrust is described as a function of the equilibrium angle displacement of the floating frame.Furthermore,the mechanical behaviors of HTS composite bearing were studied via finite element simulation and experiments,which include the load capacity,levitation stiffness and background noise.The results show that the thrust testbed can keep in low noise and have a load capacity up to 4 kg.According to the ignition testing of the electrospray thruster,the thrust force of 25.2 m N was measured by the testbed,which is close to the design value of miniature ion electrospray thruster.

高功率密度航空推进超导电机关键技术分析

超导电机因体积小、功率密度高、效率高等优势,在航空电推进领域有较大的应用潜力。基于固氮蓄冷的超导单极电机攻克了传统超导电机的低转速、高故障率、制冷系统庞大复杂等难题,可以在航空环境中稳定运行,有助于实现基于超导电驱动的航空飞行器工程化研制。

面向电动航空的高温超导电机技术研究发展

超导电机因体积小、功率密度高和效率高等优势,在航空电推进中展现出重大的应用前景。对比分析了纯电力超导电动系统和混合动力超导电动系统的方案特点,突出超导电机对于大功率航空电推进的重要性。针对航空电推进超导电动系统对电动机和发电机的不同需求,对过去研究的高温超导样机的运行原理及结构拓扑进行归类综述,并总结分析了各自利弊。在此基础上,从超导技术、电枢绕组技术、转子技术、低温技术和绝缘技术这5方面对超导电机本体关键技术分别进行回顾总结。最后,梳理了当前超导电机在航空电推进中应用的研究进展,并对未来超导电动航空发展进行了展望。

超导氢电推进系统研究进展

超导氢电推进系统结合了超导技术、氢能技术和低温冷却技术,具有高功率密度、高能源转换效率和节能减排等多重优势,目前处于深入研究和设计开发阶段。超导技术和低温冷却技术是提升电气部件性能的关键解决方案,尤其超导部件在功率密度和效率方面具备显著优势。液氢适用于机载超导材料和电气部件的冷却,氢气可以作为涡轮机或燃料电池的燃料。