A Thermoelectric Energy-Harvesting Interface With Dual-Conversion Reconfigurable DC-DC Converter and Instantaneous Linear Extrapolation MPPT Method
- Authors
- Park, Inho; Jeon, Jinwoo; Kim, Hyunjin; Park, Taehyeong; Jeong, Junwon; Kim, Chulwoo
- Issue Date
- Jun-2023
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- DC-DC converter; energy harvesting; maximum power point tracking (MPPT); thermoelectric generator (TEG); wireless sensor node (WSN)
- Citation
- IEEE JOURNAL OF SOLID-STATE CIRCUITS, v.58, no.6, pp 1706 - 1718
- Pages
- 13
- Journal Title
- IEEE JOURNAL OF SOLID-STATE CIRCUITS
- Volume
- 58
- Number
- 6
- Start Page
- 1706
- End Page
- 1718
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/151827
- DOI
- 10.1109/JSSC.2022.3214839
- ISSN
- 0018-9200
1558-173X
- Abstract
- This article presents a thermoelectric (TE) energy-harvesting interface with a reconfigurable dc-dc converter and a time-based instantaneous linear extrapolation (ILE) maximum power point tracking (MPPT) method. The proposed reconfigurable dc-dc converter comprises five switches for buck-boost operation and an additional switch for a dual-conversion mode in which battery power and TE generator (TEG) power are extracted in one cycle; therefore, the improved power density is achieved. The proposed ILE MPPT algorithm does not require TEG disconnection from the dc-dc converter, ensuring continuous TE energy extraction. The proposed MPPT method modulates the open-circuit voltage of TEG by performing linear extrapolation with a fully integrated circuit based on the steady-state voltage ripple information. The proposed interface is fabricated using a 180-nm CMOS process. The peak end-to-end efficiency of 90.48% is achieved with 0.2-V input voltage. The MPPT errors are measured up to 2.0% for the input capacitance variation and up to 1.067% for the equivalent resistance of TEG variation.
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