electrical power system for twin nano satellite mission

Paper number

IAC-14,C3,4,10,x25447

Author

Ms. SNEHA VELAYUDHAN, Nitte Meenakshi Institute Of Technology., India

Coauthor

Dr. Sandya S, India

Coauthor

Mr. RANJITH H.G., Siddaganga Institute of Technology, India

Coauthor

Mr. Shiva Abhishek, Siddaganga Institute of Technology, Tumkur, India

Year

2014

Abstract

The backbone for successful working of a satellite is the power system. The power system defines the life of the satellite and it is essential to have an efficient power system for a successful mission. The main objectives of the power system is to condition the power obtained from the solar panels, to provide the common regulated voltage, to regulate the power to the distribution unit as well as the battery unit with minimum losses, to optimize the number of batteries and its usage and to log data to the On Board Computer (OBC).


More so in a Nano-satellite, the power system has to be designed within the constraints on size, cost and performance. The Power system design for STUDSAT-2 has three solar panel, one body mounted and two deployable. The solar cell used will be Improved Triple Junction (ITJ) solar cells with solar cell efficiency of 26.8%. The secondary power source for the satellite is the battery pack which consists of Li-ion cells. Lithium ion is chosen for theSTUDSAT-2 Mission is because of its high volumetric and gravimetric energy density, enabling a compact design. The battery chosen for the STUDSAT-2 Mission is designed to have high capacity. The power distribution unit consists of voltage regulators of 3.3V, 5V, 12V to supply to various other components of the satellite.

This paper presents the power profile for both body mounted and deployable solar panels per orbit with the solar panels deployed and without the panels deployed. It gives a brief description of how the power generated by the solar cells is tracked for maximum power using Maximum Power Point Trackers. The calculation battery sizing, the design and testing of battery charge and protection circuits, the power distribution unit and the fault monitoring. The current and voltage parameters are data logged using suitable interface with the On Board Computer.

Abstract document

IAC-14,C3,4,10,x25447.brief.pdf

Manuscript document

IAC-14,C3,4,10,x25447.pdf (🔒 authorized access only).

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