Development of the Electronic Power Subsystem Design for Tel-USat

Every nanosatellite, including Tel-Usat which is currently developed by Telkom University, needs power resource to carry out its mission. Thus, a subsystem called Electrical Power System (EPS) is usually given a task to harvest and manage the power resource. One of the problems in the EPS subsystem is the design so it can work properly and effectively to convert the energy from sunlight into electric power. In this paper, two design of EPS has been done and investigated. Both design use two different concept where the model one using a pair of series SPV1040 charger module at the solar cell input while model 2 only uses single LT3652 charger module at the same point. The result shows that EPS model 2 has a better performance in charging or discharging capability although the circuit is more complex than the EPS model 1.