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Rethinking Basic Assumptions for Modeling Parasitic Capacitance in Inductors
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  • Hongbo Zhao ,
  • Shaokang Luan ,
  • zhan shen ,
  • Alex J.Hanson ,
  • Yuan Gao ,
  • Dipen Narendra Dalal ,
  • Rui Wang ,
  • Shuhan Zhou ,
  • Stig Munk-Nielsen
Hongbo Zhao
Aalborg University

Corresponding Author:[email protected]

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Shaokang Luan
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zhan shen
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Alex J.Hanson
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Dipen Narendra Dalal
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Shuhan Zhou
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Stig Munk-Nielsen
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Abstract

This paper rethinks the basic assumptions often used in analytically modeling parasitic capacitance in inductors. These assumptions are classified in two commonly-used physics-based analysis methods: the lumped capacitor network method and the energy conservation method. The lumped-capacitor network method is not the proper solution for calculating the equivalent parasitic capacitance in inductors at the first resonant frequency, but rather represents the equivalent parasitic capacitance above the last resonant frequency. The energy-conservation based method is shown to be more accurate and a reasonable solution to model the equivalent parasitic capacitance at the first resonant frequency. Multiple case studies of inductors are used for verifying the theory.
Jul 2022Published in IEEE Transactions on Power Electronics volume 37 issue 7 on pages 8281-8289. 10.1109/TPEL.2021.3139682