This paper describes a compact, lightweight power control unit suitable for a microsat. A COTS-based approach was used in component selection to enable short lead times and parts availability in addition to facilitating a lower cost. The five boards in the unit are similar in size to a 3U form factor and are packaged in a lightweight aluminum housing. The physical features of this unit include ¿ Dual 200W boost-mode battery chargers ¿ 8051 microcontrollers ¿ 96 12-bit analog channels ¿ 16 5A FET relays with individual current monitors and slew rate control ¿ PWM driver for torque rods ¿ Sun sensor conditioning circuitry ¿ Full-duplex communications channels that support various protocols including HDLC The architecture for the unit is revealed that includes the regulation methods for battery charging and solar panel power. Microcontroller functions are described that include the possibility of performing B-dot magnetic control in addition to implementing the algorithms for solar panel power monitoring. The radiation, vibration, thermal cycling and thermal vacuum test environments that this unit has been exposed to will be summarized. The test methodology and results will be examined.
A Compact Power Controller for Microsat Applications
2008-03-01
3799581 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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