Design of Inductor Winding Capacitance Cancellation for EMI Suppression

Author

Wang, Shuo ; Lee, Fred C. ; Van Wyk, Jacobus Daniel

Author_Institution

Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ.

Volume

21

Issue

6

fYear

2006

Firstpage

1825

Lastpage

1832

Abstract

In this paper, the parasitics in both differential-mode (DM) and common-mode (CM) inductors are first discussed. The methods for both DM and CM inductor winding capacitance cancellation are then proposed. Prototypes are designed and tested, using a network analyzer. Finally, the prototypes are applied to practical power converters and electromagnetic interference (EMI) is measured. Both small signal measurement and practical EMI measurement prove that the proposed methods can efficiently reduce the effects of winding capacitance and therefore improve the inductor´s filtering performance

Keywords

electromagnetic interference; interference suppression; power convertors; power filters; power inductors; windings; EMI suppression; common mode inductors; differential mode inductors; electromagnetic interference; inductor filtering performance; inductor winding capacitance cancellation; network analyzer; power converters; signal measurement; Capacitance measurement; Delta modulation; Electromagnetic interference; Electromagnetic measurements; Filtering; Inductors; Parasitic capacitance; Power measurement; Prototypes; Testing; EMI noise; Electromagnetic interference (EMI) filter; winding capacitance; winding capacitance cancellation;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2006.882898

Filename

4012167