Thanks, John.
We’re looking for good Y and X capacitors for the EMI net filter. Our plan is to use metallic Polypropylen / Film X-caps, and ceramic Y-caps. Select correct voltage range, but can’t find that much information about ESR and ESL in the datasheets. The LTSpice model should have them included anyway. Anybody here that have “favorites caps” or manufacturers to suggest for EMI netfilter? Best regards Amund Fra: John Woodgate Sendt: 1. februar 2025 16:49 Til: EMC-PSTC@LISTSERV.IEEE.ORG Emne: Re: [PSES] SV: [PSES] EMI net filter layout Apparently correct, but you should as Schaffner whether the component can be connected like that and still meet its voltage and current ratings, and whether there are any other matters to take into account. On 2025-02-01 15:11, am...@westin-emission.no <mailto:am...@westin-emission.no> wrote: Need a CM choke for high voltage and high currents in the EMI net filter. This one, https://www.schaffner.com/article/rv8141-50-s03, has 4 windings. Since we are doing only a 1-phase system, we are planning to use 2 windings pr. phase. So, when the terminals are like this: we plan for such a connection to utilize all four windings: Are the terminals connected correct with the windings in series, so the complete choke acts as a 1-line CM choke? Best regards Amund Fra: Ralph McDiarmid Sendt: 30. januar 2025 21:38 Til: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Emne: Re: [PSES] EMI net filter layout Hi Amund, You can breadboard the filter as well. No compelling need go immediately to a PCB only to find you need to change it once or twice while you converge on a final design. Careful attention to component lead dress and to a general, tidy physical layout is important above a few megahertz. Ralph From: am...@westin-emission.no <mailto:am...@westin-emission.no> <am...@westin-emission.no <mailto:am...@westin-emission.no> > Sent: January 30, 2025 4:56 AM To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] EMI net filter layout During troubleshooting in test lab, it is tempting to be quick and connect filter solutions with soldering and some wires. Instead, you should probably lay out components on a pcb and get it as it is described in the books. But in practice, at the test lab, you can't do that and the question is how messy can such an EMI filter be? How long can the wires between CM chokes, capacitors be and when you don't solder but use Wago-connectors for interconnection, is it so that the filter is almost already destroyed by the impedance that you have no control over? As we get up in frequency (conducted emission 150kH-30MHz), messy design / connection will get more worse when frequency increase, but we will get trouble anyway in the 150kH-30MHz range. At least from 1MHz. Right? 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 EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/emc-pstc@listserv.ieee.org/ <https://www.mail-archive.com/emc-pstc@listserv.ieee.org/%20> Website: https://ewh.ieee.org/soc/pses/ <https://ewh.ieee.org/soc/pses/> Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) <https://ewh.ieee.org/soc/pses/list.html> List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: msherma...@comcast.net <mailto:msherma...@comcast.net> Rick Linford at: linf...@ieee.org <mailto:linf...@ieee.org> For policy questions, send mail to: Jim Bacher at: j.bac...@ieee.org <mailto:j.bac...@ieee.org> _____ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC <https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1> &A=1 _____ 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 EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/emc-pstc@listserv.ieee.org/ <https://www.mail-archive.com/emc-pstc@listserv.ieee.org/%20> Website: https://ewh.ieee.org/soc/pses/ <https://ewh.ieee.org/soc/pses/> Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) <https://ewh.ieee.org/soc/pses/list.html> List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: msherma...@comcast.net <mailto:msherma...@comcast.net> Rick Linford at: linf...@ieee.org <mailto:linf...@ieee.org> For policy questions, send mail to: Jim Bacher at: j.bac...@ieee.org <mailto:j.bac...@ieee.org> _____ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC <https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1> &A=1 _____ 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 EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/emc-pstc@listserv.ieee.org/ <https://www.mail-archive.com/emc-pstc@listserv.ieee.org/%20> Website: https://ewh.ieee.org/soc/pses/ <https://ewh.ieee.org/soc/pses/> Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) <https://ewh.ieee.org/soc/pses/list.html> List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: msherma...@comcast.net <mailto:msherma...@comcast.net> Rick Linford at: linf...@ieee.org <mailto:linf...@ieee.org> For policy questions, send mail to: Jim Bacher at: j.bac...@ieee.org <mailto:j.bac...@ieee.org> _____ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC <https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1> &A=1 -- OOO - Own Opinions Only Best Wishes John Woodgate Keep trying <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> Virus-free. <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> www.avg.com _____ This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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