A study of the effects of snubber on switching loss and EMI in an MCT converter

Author

Yuvarajan, S. ; Nelson, R. ; Quek, Danny

Author_Institution

Dept. of Electr. Eng., North Dakota State Univ., Fargo, ND, USA

fYear

1994

fDate

2-6 Oct 1994

Firstpage

1344

Abstract

The paper presents a nonlinear analysis of the standard snubber used to protect an MCT in a DC chopper circuit. Expressions for the voltage and current during switching as well as the base values for the snubber capacitor and inductor, are derived. These results are used to determine the optimum values for the snubber elements that result in minimum switching loss. The effect of the snubber in reducing the peak power loss in the MCT is illustrated by recording the voltage, current, and power during switching. The paper also studies the effect of the standard snubber in reducing the electromagnetic interference (EMI). The study is supported by obtaining the plots of the radiated electric and magnetic emissions from the MCT chopper

Keywords

MOS-controlled thyristors; choppers (circuits); electromagnetic interference; interference suppression; losses; protection; snubbers; switching circuits; thyristor convertors; thyristors; DC chopper circuit; EMI; MCT converter; current measurement; electromagnetic interference reduction; minimum switching loss; nonlinear analysis; peak power loss reduction; power measurement; radiated electric emissions; radiated magnetic emissions; snubber; snubber capacitor; snubber inductor; switching loss; voltage measurement; Capacitors; Choppers; Circuits; Electromagnetic interference; Inductors; Magnetic recording; Protection; Snubbers; Switching loss; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1994., Conference Record of the 1994 IEEE

Conference_Location

Denver, CO

Print_ISBN

0-7803-1993-1

Type

conf

DOI

10.1109/IAS.1994.377595

Filename

377595