The operation of a self-oscillating switched-mode circuit topology for low-voltage thermal energy harvesting is analysed and experimental efficiency results are presented. Circuit self-start-up function as well as high-efficiency power transfer are obtained by using only one transformer without additional inductors. It is shown that even without using a maximum power point tracking (MPPT) tracking circuit, it is possible to achieve efficiencies up to 65% over a relatively broad input voltage range which can be optimised by properly varying the transformer turns ratio n.
Analysis of self-oscillating switched-mode circuit for low-voltage energy harvesting / Chini, Alessandro. - In: ELECTRONICS LETTERS. - ISSN 0013-5194. - STAMPA. - 49(15):(2013), pp. 941-943. [10.1049/el.2013.1372]
Analysis of self-oscillating switched-mode circuit for low-voltage energy harvesting
CHINI, Alessandro
2013
Abstract
The operation of a self-oscillating switched-mode circuit topology for low-voltage thermal energy harvesting is analysed and experimental efficiency results are presented. Circuit self-start-up function as well as high-efficiency power transfer are obtained by using only one transformer without additional inductors. It is shown that even without using a maximum power point tracking (MPPT) tracking circuit, it is possible to achieve efficiencies up to 65% over a relatively broad input voltage range which can be optimised by properly varying the transformer turns ratio n.
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