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Study of a dual polarity output voltage DC-DC converter for leakage current cancelling in space electrical propulsion

du Bois d'Enghien, Simon
(2024)

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duBoisdEnghien_36861900_2024.pdf
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Details

Supervisors
Bekemans, Marc
Faculty
Ecole polytechnique de Louvain
Degree label
Master [120] : ingénieur civil électricien, à finalité spécialisée
Abstract
In satellites, the propulsion engines play a crucial role in changing orbits efficiently and controlling the attitude of the satellite. The current technology used in spacecraft propulsion is the use of a plasma thruster, which is connected to the power bus by means of a transformer. Thales Alenia Space has been working on a new technology called the Direct-Drive architecture, but as it remains a project for now, the need of a new kind of power supply has been identified in order to cancel leakage current. The aim of this master thesis is to find a suitable solution that addresses the needs of the Direct-Drive architecture. A Watkins-Johnson converter will be designed, in order to deliver a dual polarity output voltage to the thruster’s cathode. The theoretical design will first be explained. Then, a physical circuit will be constructed and tests will be performed in order to show the good working of this prototype.