A Micro-Scale Solar Energy Harvesting Circuit with MPPT Control for Self-Powered Systems
In this paper a micro-scale solar energy harvesting system with Maximum Power Point Tracking (MPPT) control using a miniature photovoltaic cell of which the output is less than 0.5 V is proposed. The MPPT control is implemented using linear relationship between the open-circuit voltage of a main solar cell and its Maximum Power Point (MPP) voltage such that a pilot solar cell can track the MPP of the main solar cell in real time. The proposed circuit is designed in 0.18 μm CMOS process. The designed chip area is 1370 × 900 μm including a load charge pump and pads. Measured results show that the designed system can track the MPP voltage changes with variations of light intensity. The designed circuit with MPPT control provides load with MPP voltages even though the load is heavy such that it can supply more energy when the MPPT control is applied.
KeywordsEnergy harvesting Solar energy PV cell MPPT ISC USN
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010-0021112) and partially supported by IDEC.
- 1.Dondi D, Bertacchini A, Larcher L, Pavan P, Brunelli D, Benini L (2008) A solar energy harvesting circuit for low power applications. IEEE international conference on sustainable energy technologies (IEEE ICSET), pp 945–949Google Scholar
- 3.Doms I, Merken P, Van Hoof C, Mertens RP (2009) Capacitive power management circuit for micropower thermoelectric generators with a 1.4 ua controller. IEEE JSSC 44(10):2824–2833Google Scholar
- 4.Lu C, Raghunathan V, Roy K (2010) Maximum power point considerations in micro-scale solar energy harvesting systems. IEEE international symposium on circuits and systems (ISCAS), pp 273–276Google Scholar
- 5.Dondi D, Bertacchini A, Brunelli D, Larcher L, Benini L (2008) Modeling and optimization of a solar energy harvester system for self-powered wireless sensor networks. IEEE Trans Ind Electron 55(7):2759–2766Google Scholar
- 6.Méndez-Delgado E, Serranoy G, Ortiz-Rivera EI (2010) Monolithic integrated solar energy harvesting system. 35th IEEE PVSC, pp. 2833–2838Google Scholar
- 7.Lu C, Park SP, Raghunathan V, Roy K (2012) Low-overhead maximum power point tracking for micro-scale solar energy harvesting systems. VLSID, pp 215–220Google Scholar
- 8.Li X, Tsui C-Y, Ki W-H (2012) Solar energy harvesting system design using re-configurable charge pump. IEEE FTFC Google Scholar
- 9.Hua C et al (1998) Implementation of a DSP-controlled photovoltaic system with peak power tracking. IEEE Trans Ind Electron 45:99–107Google Scholar
- 10.Wu W et al.: DSP-Based multiple peak power tracking for expandable power system. Proceedings on applied power electronics conference and exposition, vol 1, pp 525–530Google Scholar
- 11.Hua C, Shen C (1997) Control of DC/DC converters for solar energy system with maximum power tracking. 23rd IECON, vol 2, pp 827–832 (1997)Google Scholar