Master of the Obvious, but it sounds to me like it is an attempt to make the current waveform (to a limited degree) follow the the voltage waveform as opposed to being a sharp spike replenishing a filter cap.
---------- >From: "KC CHAN [PDD]" <[email protected]> >To: <[email protected]> >Subject: Class C harmonics testing >Date: Thu, Nov 15, 2001, 9:59 PM > > > For Class C harmonics testing(active input power <= 25 W), one requirement > is as follows > > " the third harmonic current, ...; moreover, the waveform of the input > current shall be such that it begins to flow before or at 60 deg., has its > last peak (if there are several peaks per half period) before or at 65 deg > and does not stop flowing before 90 deg, where the zero crossing of the > fundamental supply voltage is assumed to be at 0 deg" > > Does anyone who can explain what is the purpose of this requirement? And > what is the meaning of stop flowing before 90 deg. > > thank you > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: [email protected] > Dave Heald [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: > No longer online until our new server is brought online and the old > messages are imported into the new server. > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [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: No longer online until our new server is brought online and the old messages are imported into the new server.
