After a little thought, should extend and be less obtuse. The current through ground line will always have the significant 100Hz or 120Hz component as the haversine from the input bridge is what the PFC controller is using as the comparator's reference and is what resets the off timer. But response of an active PFC circuit is dependent on the dynamic characteristics of unit loading. This 'corrective' response can result in very high crest-factor waveforms that may not always affect the RMS value of the current, but can have peaks with an amplitude that are multiples of the 120Hz stuff. And for PFC and or the main converter, 120Hz is not the fundamental.
Most my experience is PFC in CCM, so there are many other facets to PFC not being talked about. Also note that each cycle starts when the core is reset, so if next cycle is not able to re-start then there is ringing at the PFC FET. This is considered acceptable for dynamic response, and should not be a dominant noise source for the typical test done at static load. Should be noted that much of the radiated noise actually results from the PFC diode, and that much of the conducted noise results from the main converter power loop. Brian -----Original Message----- From: Brian Oconnell [mailto:[email protected]] Sent: Thursday, July 23, 2015 1:52 PM To: [email protected] Subject: Re: [PSES] GFCI Nuisance Tripping No. And is dependent on converter topology and operating conditions and whims of the Klingon High Command. Brian -----Original Message----- From: Richard Nute [mailto:[email protected]] Sent: Thursday, July 23, 2015 1:43 PM To: [email protected] Subject: Re: [PSES] GFCI Nuisance Tripping When a PFC (power factor correction) circuit is used ahead of a SMPS, is the protective conductor (leakage) current sinusoidal? Rich - ---------------------------------------------------------------- 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]> - ---------------------------------------------------------------- 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]> - ---------------------------------------------------------------- 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]>
