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Ultra-efficient localized induction heating by dual-ferrite synchronous magnetic field focusing

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Listed:
  • Cui, Peng
  • Zhu, Wenbo
  • Li, Haosong
  • Hu, Shaowei
  • Hu, Bo
  • Yang, Fan
  • Hang, Chunjin
  • Li, Mingyu

Abstract

Induction heating is widely used in aviation, communication, and new energy fields due to its advantages of non-contact, high-power, and controllable heating depth. However, it is still challenging to achieve high energy utilization efficiency of traditional induction heating, mainly due to the magnetic dispersion effect. Herein, a dual-ferrite synchronous focused (DFSF) induction heating method is first proposed by simultaneously placing ferrites inside and outside the induction coil. Meanwhile, an electromagnetic-thermal coupling numerical model was also built to predict the magnetic and temperature fields around the DFSF induction heating system. A conventional induction heating head and two DFSF induction heating heads (cone-type DFSF head and pot-type DFSF head) are compared on soldering the high-power devices. The results show a significant enhancement in magnetic flux density (MFD) with the pot-type DFSF head, exhibiting a remarkable 12-fold increase from 0.02 T to 0.24 T compared to the conventional induction head. Additionally, the pot-type DFSF head generates a substantial 22.3-fold surge in energy within the solder joint, escalating from 0.6 J to 13.4 J, surpassing the traditional induction head. Moreover, the influence mechanism of six external ferrite structural parameters on the heating efficiency was analysed to optimize the pot-type DFSF. It is found that the inner diameter of the ferrite tip has the most significant effect, which can induce a remarkable temperature variation of 310 °C. As a result of optimization, the pot-type DFSF demonstrated an impressive surge of 26% in heating efficiency. Finally, the agreement between the numerical and the experimental temperature proves the accuracy of the model, and the solder joint without defect has been achieved through the pot-type DFSF. This work effectively minimizes the magnetic dispersion and increases the energy utilization efficiency for induction heating, providing new approaches for localized soldering of high-performance power electronic devices.

Suggested Citation

  • Cui, Peng & Zhu, Wenbo & Li, Haosong & Hu, Shaowei & Hu, Bo & Yang, Fan & Hang, Chunjin & Li, Mingyu, 2023. "Ultra-efficient localized induction heating by dual-ferrite synchronous magnetic field focusing," Applied Energy, Elsevier, vol. 348(C).
    • Handle: RePEc:eee:appene:v:348:y:2023:i:c:s0306261923008991
    DOI: 10.1016/j.apenergy.2023.121535
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    References listed on IDEAS

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    1. Ding, Xiaofeng & Lu, Peng & Shan, Zhenyu, 2021. "A high-accuracy switching loss model of SiC MOSFETs in a motor drive for electric vehicles," Applied Energy, Elsevier, vol. 291(C).
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    3. Cui, Peng & Zhu, Wenbo & Ji, Hongjun & Chen, Hongtao & Hang, Chunjin & Li, Mingyu, 2022. "Analysis and optimization of induction heating processes by focusing the inner magnetism of the coil," Applied Energy, Elsevier, vol. 321(C).
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