钐钴永磁材料在30 cm氙离子推力器中的应用

磁场设计是氙离子推力器放电室可靠性设计的关键技术之一,直接影响放电室的放电稳定性及推力器在轨工作寿命。针对30cm氙离子推力器对磁路结构的特殊要求,从电磁性能、机械性能等方面分析了钐钴材料应用于30cm氙离子推力器的可行性。基于此,构建了30cm氙离子推力器磁路分析模型,运用有限元方法,获得了设计磁路构型下产生要求磁场强度的永磁体结构尺寸。结合30cm氙离子推力器在轨工作模式及空间环境特点,研究了永磁体的空间环境适应性并开展了整机性能验证。研究结果表明,采取保护措施后,钐钴永磁材料磁性能稳定性与可靠性满足30cm氙离子推力器在轨应用需求。

Application of SmCo permanent magnet materials in 30-cm xenon ion thruster

The magnetic field design is one of the most important techniques in ion thruster reliability design, it directly influence the stability and in-orbit life. Arming at special requirement of the magnetic circuit in 30cm xenon ion thruster, by analyzing the electromagnetic properties and mechanical properties, the feasibility of using SmCo permanent magnetic materials in the thruster is acquired. And the magnetic circuit model of the 30cm xenon ion thruster is established, combined with the finite element method, the dimension parameters of the permanent magnet which can produce designed magnetic induction intensity are obtained. Based on working conditions and space environments of the thruster, the space environment adaptability of SmCo permanent magnetic materials is analyzed, and its performances in ion thruster is also observed. Results show that after taking protective measures, the stability and reliability of SmCo permanent magnetic materials performances meets the requirements of in-orbit application of 30cm xenon ion thruster.