An Improved Stray Capacitance Model for Inductors

Zhan Shen, Huai Wang, Yanfeng Shen, Zian Qin, Frede Blaabjerg

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

This paper proposes an improved analytical stray capacitance model for inductors. It considers the capacitances between the winding and the central limb, side limb, and yoke of the core. The latter two account for a significant proportion of the total capacitance with the increase of the core window utilization factor. The potential of the floating core/shield is derived analytically, which enables the model to apply not only for the grounded core/shield, but also for the floating core/shield cases. Based on the improved model, an analytical optimization method for the stray capacitance in inductors is proposed. Moreover, a global Pareto optimization is carried out to identify the trade-offs between the stray capacitance and ac resistance in the winding design. Finally, the analysis and design are verified by finite element method (FEM) simulations and experimental results on a 100 kHz dual active bridge (DAB) converter.
Original languageEnglish
JournalIEEE Transactions on Power Electronics
Volume34
Issue number11
Pages (from-to)11153 - 11170
Number of pages18
ISSN0885-8993
DOIs
Publication statusPublished - Nov 2019

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Capacitance
Analytical models
Finite element method

Keywords

  • Capacitance
  • Windings
  • Inductors
  • Analytical Models
  • Optimization
  • Mathematical Model
  • Resistance

Cite this

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title = "An Improved Stray Capacitance Model for Inductors",
abstract = "This paper proposes an improved analytical stray capacitance model for inductors. It considers the capacitances between the winding and the central limb, side limb, and yoke of the core. The latter two account for a significant proportion of the total capacitance with the increase of the core window utilization factor. The potential of the floating core/shield is derived analytically, which enables the model to apply not only for the grounded core/shield, but also for the floating core/shield cases. Based on the improved model, an analytical optimization method for the stray capacitance in inductors is proposed. Moreover, a global Pareto optimization is carried out to identify the trade-offs between the stray capacitance and ac resistance in the winding design. Finally, the analysis and design are verified by finite element method (FEM) simulations and experimental results on a 100 kHz dual active bridge (DAB) converter.",
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An Improved Stray Capacitance Model for Inductors. / Shen, Zhan; Wang, Huai; Shen, Yanfeng; Qin, Zian; Blaabjerg, Frede.

In: IEEE Transactions on Power Electronics, Vol. 34, No. 11, 11.2019, p. 11153 - 11170.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - An Improved Stray Capacitance Model for Inductors

AU - Shen, Zhan

AU - Wang, Huai

AU - Shen, Yanfeng

AU - Qin, Zian

AU - Blaabjerg, Frede

PY - 2019/11

Y1 - 2019/11

N2 - This paper proposes an improved analytical stray capacitance model for inductors. It considers the capacitances between the winding and the central limb, side limb, and yoke of the core. The latter two account for a significant proportion of the total capacitance with the increase of the core window utilization factor. The potential of the floating core/shield is derived analytically, which enables the model to apply not only for the grounded core/shield, but also for the floating core/shield cases. Based on the improved model, an analytical optimization method for the stray capacitance in inductors is proposed. Moreover, a global Pareto optimization is carried out to identify the trade-offs between the stray capacitance and ac resistance in the winding design. Finally, the analysis and design are verified by finite element method (FEM) simulations and experimental results on a 100 kHz dual active bridge (DAB) converter.

AB - This paper proposes an improved analytical stray capacitance model for inductors. It considers the capacitances between the winding and the central limb, side limb, and yoke of the core. The latter two account for a significant proportion of the total capacitance with the increase of the core window utilization factor. The potential of the floating core/shield is derived analytically, which enables the model to apply not only for the grounded core/shield, but also for the floating core/shield cases. Based on the improved model, an analytical optimization method for the stray capacitance in inductors is proposed. Moreover, a global Pareto optimization is carried out to identify the trade-offs between the stray capacitance and ac resistance in the winding design. Finally, the analysis and design are verified by finite element method (FEM) simulations and experimental results on a 100 kHz dual active bridge (DAB) converter.

KW - Capacitance

KW - Windings

KW - Inductors

KW - Analytical Models

KW - Optimization

KW - Mathematical Model

KW - Resistance

U2 - 10.1109/TPEL.2019.2897787

DO - 10.1109/TPEL.2019.2897787

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SP - 11153

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JO - I E E E Transactions on Power Electronics

JF - I E E E Transactions on Power Electronics

SN - 0885-8993

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ER -