On the Maximum Power of Passive Magnetic Energy Harvesters Feeding Constant Voltage Loads Under High Primary Currents

Alexander Abramovitz, Moshe Shvartsas, Alon Kuperman

Research output: Contribution to journalArticlepeer-review

Abstract

The letter concerns clamped-type magnetic energy harvesters (MEH), supplying power to constant voltage (CV) loads via a diode rectifier. Presented analysis suggests that if primary current magnitude reflected to the secondary side is much higher than core saturation current, then optimal (in terms input MEH power maximization) transfer window length and corresponding load voltage-per-turn ratio become independent of primary current. As a result, certain unique value of load voltage maximizes the power of a given MEH irrespective of primary current magnitude. Moreover, mean magnetic flux path length, B-H curve shape and permeability of the core have no effect on either optimal load voltage-per-turn ratio or maximum harvested power under the above circumstances.

Original languageAmerican English
Pages (from-to)1-4
Number of pages4
JournalIEEE Transactions on Power Electronics
DOIs
StateAccepted/In press - 1 Jan 2024

Keywords

  • Circuit faults
  • Conductors
  • Magnetic energy harvester
  • Magnetic flux
  • maximum power
  • saturation
  • Saturation magnetization
  • Transformer cores
  • Transformers
  • Voltage

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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