More than ever, the telecom Geo satellites industry is facing a highly competitive market, where the technical and cost performances have to be improved constantly.
In the frame of the common Alcatel-Astrium @BUS platform, a new generation of PCU shall be developed in order to improve its competitiveness in terms of mass, efficiency, power modularity and above all cost. Optimisation shall be performed in the nominal @Bus power range (13 to 19 kW), but extension from 8 to 26 kW shall be analysed. In addition, retrofit to the present Alcatel platform (SB4000) and Astrium platform (EUROSTAR 3000) shall be also investigated as far as possible.
|The design and development of the SRU will be based on the SB4-PCU experience, but with important upgrades (design to cost activity mainly based on the design rules simplification, new generation of power components, topologies review, update of the environment constraints., & ) in order to meet the following objectives:|
See the project objectives.
The baseline to supply the satellite equipments is a full regulated bus at 100V using solar array sources during sunlight periods and single (at low power) or two Li-Ion batteries during eclipse periods. This architecture is similar to the SB4000 architecture.
In addition, the SRU assumes the charge management (charge current control, EoC regulation, warnings activation) under OBC responsibility.
The predevelopment has been completed by the Architecture Review held end of June 2004.