Design of an inductor-less step-up ac/dc converter for 0.3 V@1 MHz vibration energy harvesting
In: Energy Reports, Jg. 6 (2020-02-01), S. 159-165
Online
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Zugriff:
For vibration energy harvesting, we propose an inductor-less step-up ac/dc converter in this paper. To realize the inductor-less design, the proposed ac/dc converter consists of two converter blocks: Cockcroft–Walton circuit and charge pump. Unlike existing ac/dc converters for vibration energy harvesting, the proposed ac/dc converter can achieve less electro-magnetic interference (EMI), because no magnetic component is necessary. Furthermore, owing to the Cockcroft–Walton circuit, a full-bridge circuit is not necessary to convert vibration energy. Therefore, small vibration energy, namely, as 0.3 V@1 MHz, can be converted directly to dc voltage. Through theoretical analysis and simulation program with integrated circuit emphasis (SPICE) simulation, the performance of the proposed converter with 6× voltage gain is investigated, where the proposed converter is designed by assuming 0.18μmCMOS process. The proposed converter demonstrates that about 62% power efficiency can be provided, where the output power is 30 μW, the output voltage is about 1.6 V, and the ripple factor is 0.8%. Furthermore, the feasibility of the proposed ac/dc converter is confirmed by breadboard experiments. The inductor-less design provides us to integrate the proposed ac/dc converter into a hybrid IC chip. Keywords: Vibration energy harvesting, ac/dc converters, Inductor-less converters, Cockcroft–Walton circuit, Charge pump, CMOS circuits
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Design of an inductor-less step-up ac/dc converter for 0.3 V@1 MHz vibration energy harvesting
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Autor/in / Beteiligte Person: | Ishibashi, Takaaki ; Kuwahara, Kyoka ; Shibata, Akira ; Eguchi, Kei |
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Zeitschrift: | Energy Reports, Jg. 6 (2020-02-01), S. 159-165 |
Veröffentlichung: | Elsevier, 2020 |
Medientyp: | unknown |
ISSN: | 2352-4847 (print) |
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