Hi Everyone, 'Been writing again, this time comparing single and multiple turn ferrites. This month's Technical Tidbit on my website discusses characteristics of ferrite cores with single or multiple turn windings and the conditions where each performs best based upon measured data.
Abstract: Ferrite chokes are often used to reduce currents due to ESD and to provide series impedance to suppress common mode currents that can cause EMC emissions problems. Data is presented to show how an ESD current is affected by single pass and multiple turn ferrite chokes. The data is extended to predict how the chokes affect EMC emissions. Recommendations are inferred from the data as to when to use single pass or multiple turn windings on ferrite cores. The link to the article is the picture of the experimental test setup at the bottom of the home page at http://emcesd.com . -- ___ _ Doug Smith \ / ) P.O. Box 1457 ========= Los Gatos, CA 95031-1457 _ / \ / \ _ TEL/FAX: 408-356-4186/358-3799 / /\ \ ] / /\ \ Mobile: 408-858-4528 | q-----( ) | o | Email: [email protected] \ _ / ] \ _ / Website: http://www.dsmith.org This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
