The effect of impedance mismatch on the conducted EMI emission

Author

Thammasiriroj, W. ; Ruayariyasub, S. ; Khan-ngern, Werachet ; Nitta, S.

Author_Institution

Electr. Eng. Dept., King Mongkut´s Inst. of Technol., Bangkok, Thailand

fYear

2003

fDate

4-7 Nov. 2003

Firstpage

346

Lastpage

349

Abstract

The paper proposes a process to predict and analyze conducted electromagnetic interference (EMI) emission using the impedance mismatch approach. Five steps of this process are introduced and analyzed. The impedance mismatch criterion is proposed based on current and voltage waveforms in the time domain. The impedance mismatch fixtures and EMI measured results show how the impedance ratio and conducted EMI emission are related. The work was done using a class E zero-voltage switching (ZVS) resonant inverter at various load conditions - unity, lagging and leading power factors. The experimental results show good agreement with simulated results, which are accomplished by the MATLAB program.

Keywords

electric impedance; electromagnetic interference; power factor; resonant invertors; time-domain analysis; class E resonant inverter; conducted EMI emission; conducted electromagnetic interference emission; current waveforms; impedance mismatch; impedance ratio; lagging power factor; leading power factor; time domain; unity power factor; voltage waveforms; zero-voltage switching resonant inverter; Capacitors; Circuits; Electromagnetic interference; Frequency; Impedance; Laboratories; Reactive power; Resonant inverters; Switches; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Environmental Electromagnetics, 2003. CEEM 2003. Proceedings. Asia-Pacific Conference on

Conference_Location

Hangzhou, China

Print_ISBN

7-5635-0802-3

Type

conf

DOI

10.1109/CEEM.2003.238066

Filename

1282342