Re: IEC 61000-3-2 -3-3
My comments re Woodgate was confsuing. What I meant to say was the transformerless SMPS s appear to generate considerable nosie as opposed to the passive transformer. Is anyone concerned about this noise? Ralph Cameron - Original Message - From: Ralph Cameron ral...@igs.net To: Dick Grobner dick.grob...@medgraph.com; IEEE EMC-PSTC E-Mail Forum (E-mail) emc-p...@majordomo.ieee.org Sent: Tuesday, November 28, 2000 11:14 PM Subject: Re: IEC 61000-3-2 -3-3 J.M.Woodgate's comments are very appropriate to identify where all the conducted noise is coming from in consumer residences but does nothing to mitigate the problem. The unfiltered SMPS used for replacement of the old reliable non noise generating physical transformer contributes little or no noise. As soon as some of these high efficiency noise (e.g. Halogen /Xenon lighting supplies) generators start truning the Samrt House concept into a Haunted House, watch the brickbats fly. Ralph Cameron EMC Consulting and Suppression of Consumer Electronics (After sale) p.s. That goes for the trasnformerless supplies in treadmills too. - Original Message - From: Dick Grobner dick.grob...@medgraph.com To: IEEE EMC-PSTC E-Mail Forum (E-mail) emc-p...@majordomo.ieee.org Sent: Tuesday, November 28, 2000 3:50 PM Subject: IEC 61000-3-2 -3-3 At the web address below you will find an article written by J.M. Woodgate dealing with 61000-3-2 -3. This may be of interest to some on this forum as I know the issue seems to surface about every other week. Happy Reading! http://www.conformity-update.com/iec-61000-000908.htm Dick Grobner Compliance Engineering Medical Graphics Corporation 350 Oak Grove Parkway St Paul, MN 55127 651-766-3395 651-766-3389 (fax) dick.grob...@medgraph.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: IEC 61000-3-2 -3-3
J.M.Woodgate's comments are very appropriate to identify where all the conducted noise is coming from in consumer residences but does nothing to mitigate the problem. The unfiltered SMPS used for replacement of the old reliable non noise generating physical transformer contributes little or no noise. As soon as some of these high efficiency noise (e.g. Halogen /Xenon lighting supplies) generators start truning the Samrt House concept into a Haunted House, watch the brickbats fly. Ralph Cameron EMC Consulting and Suppression of Consumer Electronics (After sale) p.s. That goes for the trasnformerless supplies in treadmills too. - Original Message - From: Dick Grobner dick.grob...@medgraph.com To: IEEE EMC-PSTC E-Mail Forum (E-mail) emc-p...@majordomo.ieee.org Sent: Tuesday, November 28, 2000 3:50 PM Subject: IEC 61000-3-2 -3-3 At the web address below you will find an article written by J.M. Woodgate dealing with 61000-3-2 -3. This may be of interest to some on this forum as I know the issue seems to surface about every other week. Happy Reading! http://www.conformity-update.com/iec-61000-000908.htm Dick Grobner Compliance Engineering Medical Graphics Corporation 350 Oak Grove Parkway St Paul, MN 55127 651-766-3395 651-766-3389 (fax) dick.grob...@medgraph.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
IEC 61000-3-2 -3-3
At the web address below you will find an article written by J.M. Woodgate dealing with 61000-3-2 -3. This may be of interest to some on this forum as I know the issue seems to surface about every other week. Happy Reading! http://www.conformity-update.com/iec-61000-000908.htm Dick Grobner Compliance Engineering Medical Graphics Corporation 350 Oak Grove Parkway St Paul, MN 55127 651-766-3395 651-766-3389 (fax) dick.grob...@medgraph.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org