This paper describes in detail the ALMASat-1 microsatellite electrical power system, with particular emphasis to the system main components: solar panels, on-board batteries and power management board. After a brief overview of ALMASat-1 main characteristics, the power budget, is introduced showing the spacecraft “modes” defined for evaluation of the on-board instantaneous power consumption and the method for evaluation of the instantaneous generated power. Next, the solar arrays assembly procedures and technologies as well as solar cells classification results are presented. In the next section the battery testing campaign is described, highlighting the results of the vacuum tests performed on the commercial Li-Ion battery packs selected for the ALMASat-1 mission, and the low-temperature performance obtained in temperature-controlled charge-discharge battery cycles. The power management board is next described, highlighting the level of redundancy obtained and the different logical blocks managing the solar arrays, the battery packs, the bus voltage regulation and the telemetry data handling.

ALMASat Power System

ANTONINI, FABIO;GRAZIANI, ALBERTO;PIERGENTILI, FABRIZIO;TORTORA, PAOLO;
2007

Abstract

This paper describes in detail the ALMASat-1 microsatellite electrical power system, with particular emphasis to the system main components: solar panels, on-board batteries and power management board. After a brief overview of ALMASat-1 main characteristics, the power budget, is introduced showing the spacecraft “modes” defined for evaluation of the on-board instantaneous power consumption and the method for evaluation of the instantaneous generated power. Next, the solar arrays assembly procedures and technologies as well as solar cells classification results are presented. In the next section the battery testing campaign is described, highlighting the results of the vacuum tests performed on the commercial Li-Ion battery packs selected for the ALMASat-1 mission, and the low-temperature performance obtained in temperature-controlled charge-discharge battery cycles. The power management board is next described, highlighting the level of redundancy obtained and the different logical blocks managing the solar arrays, the battery packs, the bus voltage regulation and the telemetry data handling.
Atti del XIX Congresso Nazionale A.I.D.A.A.
F. Antonini; A. Gamberini; A. Graziani; F. Piergentili; A. Tambini; P. Tortora; M. Macellari; A. Schiaratura; L. Schirone
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/47544
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