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Power line filter design for conducted electromagnetic interference using time-domain measurements

DSpace at IIT Bombay

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Title Power line filter design for conducted electromagnetic interference using time-domain measurements
 
Creator AGARWAL, VIVEK
MOHIT KUMAR
 
Subject electric impedance
passive filters
mathematical models
time domain analysis
 
Description A time-domain technique for the design of passive power line conducted electromagnetic interference (EMI) filters in the frequency range 150 kHz-30 MHz is described. A digital storage oscilloscope (DSO) with adequate sampling, storing and processing features is sufficient for the design using the proposed technique. Accordingly, Agilent's Infiniium Oscilloscope (Model 54810A) has been used. The signals from LISN are directly fed into the two channels of the DSO where they are added and subtracted to separate the CM and DM components, thereby eliminating the need for common-mode-differential mode (CM-DM) separator. These components are stored in the DSO. A specially designed filter design software (FDS), residing in the DSO, estimates the noise spectrum by computing the Bartlett and Welch periodograms. It also computes the filter component values. Thus, the sampling of the conducted noise, separation of CM and DM components, signal processing, and filter value computations are all done using one DSO. A spectrum analyzer is not required. Bartlett periodograms have been preferred over Welch periodograms due to low memory storage requirements of the former. The proposed technique has been applied to the design of power line filter for a switched mode power supply (SMPS), and satisfactory results have been obtained. The proposed measurement scheme is compact, economical, and convenient. All the details of this work are presented.
 
Publisher IEEE
 
Date 2008-11-21T06:43:03Z
2011-11-25T12:26:45Z
2011-12-26T13:06:31Z
2011-12-27T05:54:22Z
2008-11-21T06:43:03Z
2011-11-25T12:26:45Z
2011-12-26T13:06:31Z
2011-12-27T05:54:22Z
2006
 
Type Article
 
Identifier IEEE Transactions on Electromagnetic Compatibility 48(1), 178-86
0018-9375
http://dx.doi.org/10.1109/TEMC.2006.870697
http://hdl.handle.net/10054/72
http://dspace.library.iitb.ac.in/xmlui/handle/10054/72
 
Language en_US