I read in !emc-pstc that [email protected] wrote (in <[email protected]>) about 'Measuring AC Line Impedance' on Tue, 5 Nov 2002: >Part 1. This measurement will NOT give just the resistive part of the >source impedance.
Your post is so long that it is not clear what you are trying to correct. Also, by top-posting you make it more difficult to understand how your comments relate to previous texts. If we measure the voltage developed across a resistive load, we have one equation with three unknowns, e.m.f., source inductance and source resistance. If we measure the voltage developed across a pure capacitive load (or one with known losses), we also have one equation with three unknowns. If we measure the *open-circuit* voltage, we immediately have the value of one unknown, the e.m.f. or Thevenin equivalent source voltage. That leaves us with two equations and two unknowns, which are soluble. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! ------------------------------------------- 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: Ron Pickard: [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: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
