在地面真空测试设施中,霍尔效应推进器阻抗的表征.
David R Jovel1, Janice D Cabrera1, Mitchell L R Walker1
1School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332 USA.
Journal of electric propulsion
|December 5, 2024
概括
霍尔效应推进器 (HET) 由于等离子体振荡而表现出交流特性. 这项研究使用阻抗分析来量化HET的电阻,电容和电感性质,揭示了对其动态行为的关键见解.
科学领域:
- 太空飞船推进器 太空飞船推进器
- 等离子体物理学的物理学
背景情况:
- 霍尔效应推进器 (HET) 通常被视为直流装置,但由于复杂的等离子动力学,它们的放电电流表现出因时间变化的交流特性.
- 量化这些振荡是具有挑战性的,因为HET是非线性,时间变量的电荷.
研究的目的:
- 为了克服分析非线性,时间变量的HET负载的挑战.
- 用小信号阻抗分析来描述HET放电的有效电阻和反应电阻.
- 开发一种用于测量HET阻抗和AC特征的新型诊断.
主要方法:
- 在7kW级HET.上进行了小信号阻抗分析.
- 测量阻抗大小和阶段从100 Hz到300 kHz,具有±2 V的激发信号.
- 在两个条件下在子上运行HET:4.5kW,15A和6kW,20A.
主要成果:
- 在HET放电中量化的电阻,电容和电感元件.
- 估计的呼吸模式电容在12.6μF和电感在15.3μH为4.5kW,15A条件.
- 经过验证的阻抗测量与功率光谱密度图表相对应,显示在±2.4 kHz内具有良好的一致性.
结论:
- 小信号阻抗分析对于将HET描述为非线性,时间变量的负载是有效的.
- 开发的阻抗测量诊断提供了对HET AC行为有价值的见解.
- 这种方法有助于通过量化等离子体振荡影响来理解和优化HET性能.
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