Buck Converter and SEPIC Based Electronic Power Supply Design with MPPT and Voltage Regulation for Small Satellite Applications
Rachid Darbali-Zamora1, Nicolás Cobo-Yepes1, John E. Salazar-Duque1, Eduardo I. Ortiz-Rivera1, Amilcar A. Rincon-Charris2
1University of Puerto Rico-Mayagüez, Mayagüez, PR, United States
/2Inter American University of Puerto Rico-Bayamon , Bayamon , PR, United States

This paper presents the proposed power distribution system designed for the power management of the Puerto Rico CubeSat. CubeSat’s are cube shaped micro scaled satellites of low mass and size targeted at perform a wide range of tasks, such as collecting and transmitting data. Power is provided to the CubeSat using Gallium Arsenide (GaAs) solar panels mounted on each side of the satellite. It is vital to maximize the available electrical energy obtained from the minimal solar cell area available. Solar cell area limitations require maximizing the available electrical energy generated. To achieve this, Maximum Power Point Tracking (MPPT) techniques can be employed to extract the utmost available power from a Photovoltaic Module (PVM). The SEPIC topology performs the Optimal Duty Ratio (ODR) MPPT technique to obtain the optimal current and voltage values of the PVM. The Buck converter is used to provide voltage regulation for a wide range of CubeSat payloads. Experimental results illustrate the SEPICs execution of the ODR MPPT technique under a different range of voltage regulated payload. The power distribution for the CubeSat is designed for high efficiency, utilizing high performance GaAs solar panels and DC/DC converters in combination with the ODR MPPT technique to improve the power extraction and further increase efficiency.  


Area: Sub-Area 10.3: Maximizing Power Output On and Off the Grid