loading page

Parasitic Capacitance in Copper-Foiled Medium-Voltage Filter Inductors
  • +4
  • Hongbo Zhao ,
  • Zhizhao Huang ,
  • Dipen Narendra Dalal ,
  • Jannick Kjær Jørgensen ,
  • Asger Bjørn Jørgensen ,
  • xiongfei wang ,
  • Stig Munk-Nielsen
Hongbo Zhao
Aalborg University

Corresponding Author:[email protected]

Author Profile
Zhizhao Huang
Author Profile
Dipen Narendra Dalal
Author Profile
Jannick Kjær Jørgensen
Author Profile
Asger Bjørn Jørgensen
Author Profile
xiongfei wang
Author Profile
Stig Munk-Nielsen
Author Profile

Abstract

This paper characterizes three parasitic capacitances in copper-foiled medium-voltage inductors. It is found that the conventional modeling method overlooks the effect of the fringe field, which leads to inaccurate modeling of parasitic capacitances in copper-foiled inductors. To address this problem, the parasitic capacitances contributed by the fringe field is identified first, and a physics-based analytical modeling method for the parasitic capacitances contributed by the fringe field is proposed, which avoids using any empirical equations. The total parasitic capacitances are then derived for three different cases with three different core potentials, from which a three-terminal equivalent circuit is derived, and thus, the parasitic capacitances in copper-foiled inductors are explicitly identified. The calculated results show a close agreement with the measured capacitance by using an impedance analyzer.