Journal Title : International Journal of Modern Trends in Engineering and Science

Author’s Name : A Rujvana Parveen

Volume 02 Issue 06  Year 2015 

ISSN no: 2348-3121  

Page no: 8-11

Abstract— Thermoelectric generators (TEG) are physically and electrically robust semiconductor devices able to convert thermal energy into electrical energy, provided that a temperature gradient is maintained across them, exploiting the Seebeck effect. It is very critical to track the optimum electrical energy through the use of power electronic converters controlled by a Maximum Power Point Tracking (MPPT) algorithm. This paper presents an innovative way to perform the maximum power point tracking using cascaded buck-boost converter. The proposed MPPT technique is supported by theoretical analysis and used to control a cascaded buck-boost converter. The prototype MPPT converter is controlled by an inexpensive microcontroller, and a lead-acid battery is used to accumulate the harvested energy. Experimental results using commercial TEG devices prove that the converter accurately tracks the maximum power point during thermal transients. Precise measurements in steady state show that the converter found the maximum power point with a maximum tracking efficiency.

Keywords TEG; MPPT; cascaded; buck-boost; DC-DC; converter

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