A Thermoelectric Energy-Harvesting Interface With Dual-Conversion Reconfigurable DC-DC Converter and Instantaneous Linear Extrapolation MPPT Method

Inho Park, Jinwoo Jeon, Hyunjin Kim, Taehyeong Park, Junwon Jeong, Chulwoo Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1706-1718
Number of pages13
JournalIEEE Journal of Solid-State Circuits
Volume58
Issue number6
DOIs
Publication statusPublished - 2023 Jun 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) through the Korean Government (MSIP) under Grant NRF-2022R1A2C3012245.

Publisher Copyright:
© 1966-2012 IEEE.

Keywords

  • DC-DC converter
  • energy harvesting
  • maximum power point tracking (MPPT)
  • thermoelectric generator (TEG)
  • wireless sensor node (WSN)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'A Thermoelectric Energy-Harvesting Interface With Dual-Conversion Reconfigurable DC-DC Converter and Instantaneous Linear Extrapolation MPPT Method'. Together they form a unique fingerprint.

Cite this