I was thinking more about radiated emission (30 Mhz-1 GHz) that is enhanced by cables.
For some interesting results reported by Douglas Smith (cir. 1999 ) see: http://emcesd.com/tt120199.htm Effectively it is half (?) a turn if a ferrite clamp-cores are used, hence a distributed :-) Tim Foo, E-mail: [email protected] ECE, School of Engineering, http://www.np.edu.sg/ece/ Tel: + 65 460 6143 Ngee Ann Polytechnic, Fax: + 65 467 1730 535 Clementi Road, Singapore 599489 "Ralph Cameron" <[email protected]> To: "Wan Juang Foo" <[email protected]> Sent by: cc: <[email protected]> owner-emc-pstc@majordom Subject: Re: Examples of EMC problems in the real world o.ieee.org 06/28/01 09:01 PM Please respond to "Ralph Cameron" When the material of the core and the windings are as specified , the emission reduction is uniform over the range for which it is designed- 1Mhz-30Mhz. Resonance is avoided by a distributed winding Ralph Cameron ----- Original Message ----- From: "Wan Juang Foo" <[email protected]> To: "Ralph Cameron" <[email protected]> Cc: <[email protected]> Sent: Thursday, June 28, 2001 1:45 AM Subject: Re: Examples of EMC problems in the real world > > The so call reduction in emmission does not happen all the time. There is > still the possibility of resonance, this I have observed in several cases > over the past 7 years . > > Tim Foo, E-mail: [email protected] > ECE, School of Engineering, > http://www.np.edu.sg/ece/ Tel: + 65 460 6143 > Ngee Ann Polytechnic, Fax: + 65 467 1730 > 535 Clementi Road, > Singapore 599489 > > > > "Ralph Cameron" > <[email protected]> To: <[email protected]> > Sent by: cc: <[email protected]>, (bcc: Wan Juang > owner-emc-pstc@majordom Foo/ece/staff/npnet) > o.ieee.org Subject: Re: Examples of EMC problems in the real world > > > 06/27/01 09:16 PM > Please respond to > "Ralph Cameron" > > > > > > > > Bob: > > It just occurred to me that list members may not be failimiar with the > application of these components after manufacture. If needed I would be > glad > to elaborate. Basically, since conducted immunity also decreases conducted > emissions its a double benefit. > > > > > <snip> ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [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.rcic.com/ click on "Virtual Conference Hall,"
