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Simulation of magnetic energy harvesters using an improved synchronous electronic charging extraction circuit

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  • Wang, Yongkun
  • You, Zhixiong
  • Miao, Huining
  • Shi, Yang

Abstract

The magneto-mechano-electric (MME) coupling has shown great potential for harvesting environmental magnetic energy. However, existing MME energy harvesters are overly reliant on external power-driven controllers, which complicates the design of control signals and timing matching. This paper proposes an improved synchronous electronic charging extraction (SECE) circuit to enhance the performance of MME energy harvesters and establishes a co-simulation model integrating both structure and circuit aspects. The model effectively combines magnetic moment calculation, finite element simulation, and circuit simulation, allowing for the quantitative prediction of the output characteristics of magnetic energy harvesters in real-world applications. The simulation results align well with experimental data. The results show that the output voltage of a single harvester using the SECE circuit increases by 50 %, reaching twice the output voltage of a full-bridge rectifier (FBR) circuit; the maximum output power exceeds a 60 % increase compared to the FBR circuit. The SECE circuit effectively addresses phase mismatch issues among different structures, enabling efficient charge extraction when harvesting energy from multiple structures simultaneously. The maximum output power of an array using the SECE circuit reaches 506 μW, an increase of 36.8 % over the FBR circuit. This work offers a novel perspective for enhancing the performance of magnetic energy harvesters.

Suggested Citation

  • Wang, Yongkun & You, Zhixiong & Miao, Huining & Shi, Yang, 2025. "Simulation of magnetic energy harvesters using an improved synchronous electronic charging extraction circuit," Energy, Elsevier, vol. 331(C).
    • Handle: RePEc:eee:energy:v:331:y:2025:i:c:s036054422502657x
    DOI: 10.1016/j.energy.2025.137015
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    References listed on IDEAS

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