> -----Original Message----- > From: John Woodgate [ mailto:[email protected]] > Sent: Saturday, October 16, 2004 2:03 PM > To: [email protected] > Subject: Re: Power Factor correction
> Then there is the 'distortion power factor', which is a measure of the > ratio of total r.m.s. voltage to its fundamental component and of the > total r.m.s current to its fundamental component. Typically, I have always measured/calculated distortion PF using the current waveform. What market segments tend to use/prefer the voltage w/f ? Do you think that end-users of component power supplies prefer one parametric over the other ? > If it only meets the Class A limits, it doesn't have much distortion > power factor correction, if any. The displacement power factor depends > on how heavily the power supply is loaded. I would appreciate if you could offer more commentary/insight on this statement. Perhaps this is not based on power supplies that use active PFC, where output loading has minimal influence on measured PF within the unit's ratings. > You aren't going to solve this without getting your hands on an actual > power supply. Believe me! All should heed this statment from a man older and wiser then me... Nothing beats empirical verification, under end-use conditions. luck, Brian ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: [email protected] Scott Douglas [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.ieeecommunities.org/emc-pstc
