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Linear power control system for a nanosatellite
Author(s)
Ilutu, Danny Makimi
Date Issued
2011
Type
Thesis
Publisher
Cape Peninsula University of Technology
Abstract
Nanosatellite is an electronic device that requires a steady and reliable electrical power
supplier (EPS) in order to drive all its electronic circuits. Its unpredictable failures can lead to
extensive financial and time losses. The failures may be owing to the environment in which
the satellite operates; the technique and the method used to generate power. In order to
effectively minimise the risk of the EPS failures, a better technique is essential.
The direct energy transfer (DET) technique was chosen for this research because it provides
high efficiency and high reliability, unlike the maximum power point tracking (MPPT)
technique, which obtains maximum power from the solar cells by using a microcontroller.
DET works on a fixed working point of current-voltage characteristic and responds to all
satellite power system requirements.
The microcontroller is not a suitable device in satellite electrical power systems that requires
high reliability, but is used because it is difficult to track the maximum power of solar cells
without it. The analog MPPT system is another option, but the technique requires discrete
components. Its deployment is limited because of the system's operating frequency and
large electronic components such as the inductor and capacitor.
supplier (EPS) in order to drive all its electronic circuits. Its unpredictable failures can lead to
extensive financial and time losses. The failures may be owing to the environment in which
the satellite operates; the technique and the method used to generate power. In order to
effectively minimise the risk of the EPS failures, a better technique is essential.
The direct energy transfer (DET) technique was chosen for this research because it provides
high efficiency and high reliability, unlike the maximum power point tracking (MPPT)
technique, which obtains maximum power from the solar cells by using a microcontroller.
DET works on a fixed working point of current-voltage characteristic and responds to all
satellite power system requirements.
The microcontroller is not a suitable device in satellite electrical power systems that requires
high reliability, but is used because it is difficult to track the maximum power of solar cells
without it. The analog MPPT system is another option, but the technique requires discrete
components. Its deployment is limited because of the system's operating frequency and
large electronic components such as the inductor and capacitor.
Additional information
Thesis (MTech(Electrical Engineering))--Cape Peninsula University of Technology, 2011.
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20132038_ Ilutu_DM_Mtech_Elec_Eng_2011_20132038.pdf
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Thesis
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