Spatial equivalent circuit model for simulation of on-chip thermoelectric harvesters

Simon Lineykin, Moshe Sitbon, Alon Kuperman

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Interest in autonomous low-power energy sources has risen with the development and widespread use of devices with very low energy consumption. Interest in thermoelectric harvesters has increased against this background. Thermoelectric harvesters, especially harvesters on-chip, have peculiar properties related to the thermal route, thermal transients, and spatial temperature distribution within the chip. A behavioral model of the harvester is required for engineers to successfully develop voltage converters with maximum power point tracking and energy storage units. There are accurate models based on the finite element method, but these models are usually not compatible with simulators of electrical circuits, and therefore are not convenient for designers. Existing equivalent circuit models fit this requirement, but usually do not consider many parameters. This article proposes an original method that allows simulating spatial thermoelectric processes by analogy with the finite difference method, using electrical circuits simulations software. The study proposes a complete methodology for building the model and examples of simulations of one-, twoand three-dimensional problems, as well as examples of simulation of macro problems in the presence of external thermal and electrical devices, such as heatsink and electrical load.

Original languageEnglish
Article number574
Pages (from-to)1-19
Number of pages19
JournalMicromachines
Volume11
Issue number6
DOIs
StatePublished - 1 Jun 2020

Keywords

  • Circuit simulator
  • Equivalent circuit model
  • Low power generator
  • Miniaturized generator
  • On-chip generator
  • Thermal electrical analogies
  • Thermoelectric generator
  • Thermoelectric harvester

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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