Satellite Electrical Power System -Nuno Laranjeira Ramo Thesis to obtain the Master of Science Degree in Electronics Engineering -INSTITUTO SUPERIOR DE LISBOA

Satellite Electrical Power System by Nuno Laranjeira Ramo Thesis to obtain the Master of Science Degree in Electronics Engineering -INSTITUTO SUPERIOR DE LISBOA 

 Abstract The Electrical Power System (EPS) is an electronic circuit board that is designed to supply and manage process the energy in an efficient way. This document describes the design architecture and circuits involved for an EPS deployed in the ISTsat ONE nano satellite project. The EPS generates energy through its solar panels which is stored in the battery and then, using DC-DC switching voltage regulators, converts it to the final voltage of +3.3 V and +5 V, supplying these voltage rails for the rest of the subsystems of the satellite. This architecture meets the performance and size requirements of CubeSat architecture (cubic shape with 10 cm of edge, satellite with less than 10 kg). The EPS is composed by various systems, namely: Maximum Power Point Tracking mechanism to achieve maximum efficiency in the conversion of solar energy, a 20.8 Wh battery, solar panels and redundant circuitry to continuously ensure the power supply to the satellite. The EPS is a subsystem of the ISTsat ONE and as such, it communicates with other subsystems present in the satellite sending data logs, error warnings as well as receiving commands.

FULL THESIS: https://istsat-one.tecnico.ulisboa.pt/~istsat-one.daemon/docs/thesis_NunoRamos_EPS_2018.pdf