Publication

Slip Ring Test Assembly With Increased Breakdown Voltage Limit for High-Voltage Bus Satellites

Fabio Avino, Ivo Furno, Alan Howling
2020
Journal paper
Abstract

In this article, a setup including a passive gas breakdown mitigation technique for satellite slip ring assemblies (SRAs) is introduced and tested. The setup features a central conducting ring, separated from two external conducting limiting discs (LDs) by insulating rings. The characteristic breakdown curves are measured as a function of the surrounding pressure by biasing the central ring and setting the LDs at a variable voltage. The minimum breakdown voltage is increased from similar to 420 to similar to 860 V by biasing the LDs at one half of the voltage applied to the central ring. This solution is further applied on a test-SRA that includes the main features of a standard cylindrical SRA: a stack of conducting rings on which conducting brushes slip to ensure the electrical contact between moving components. The minimum of the breakdown curve is raised from similar to 400 V for the grounded LDs to similar to 600 V for the passively biased LDs. This result confirms the possibility to improve SRA protection for the entire pressure range encountered by a satellite during its operational life, from atmospheric pressure to in-orbit high-vacuum, meeting the requirements for the next generation of satellites.

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Related concepts (6)
Vacuum
A vacuum (: vacuums or vacua) is a space devoid of matter. The word is derived from the Latin adjective vacuus for "vacant" or "void". An approximation to such vacuum is a region with a gaseous pre
Satellite
A satellite or artificial satellite is an object intentionally placed into orbit around a celestial body. Satellites have a variety of uses, including communication relay, weather forecasting, navig
Voltage
Voltage, also known as electric pressure, electric tension, or (electric) potential difference, is the difference in electric potential between two points. In a static electric field, it corresponds t
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