Hi – This IS an interesting problem! My question: Is the 3 –phase configures as a delta or a wye configuration? Also – What is the AC device (power supply/motors etc..)
[Working From Home] Charles Grasso Crackpot Theorist Dish Technologies (c) 303-204-2974 (h) 303-317-5530 (e ) [email protected] (e2) [email protected] From: Patrick <[email protected]> Sent: Sunday, June 28, 2020 9:50 AM To: [email protected] Subject: Re: [PSES] Conducted emission - AC line filters makes it worse This message originated outside of DISH and was sent by: [email protected]<mailto:[email protected]> Hi Amund This sounds like a very interesting problem. Likely many people will have advice. Maybe get lucky and someone will have had this exact same problem. I'd like to help if I can. Do you have more information on the failure? What test standard and test method did you use? How much over the limit? What filters were used and how were they connected? It could be an installation of good filters, but not wired for the emission type. Also could be wrong filter type for problem? Very interesting. On Sun, Jun 28, 2020, 2:58 AM Amund Westin <[email protected]<mailto:[email protected]>> wrote: A 3-phase product has three internal AC driven devices. The product fails on Conducted emission. When connecting AC filters to each internal AC driven devices, the emission gets even worse. Any clue about this phenomena? Is it some kind of impedance mismatch which derate the filters performance? BR Amund - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher: <[email protected]<mailto:[email protected]>> David Heald: <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) 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: Jim Bacher: <[email protected]> David Heald: <[email protected]>
