This sounds like something that won't be found on the shelf. I have seen some small AC welding machines where the output current was adjustable by increasing and decreasing an adjustable air gap designed into the magnetic path of the flux cutting the output winding. The flux path in the primary remains unchanged. They make a H of a noise under load. I have not the slightest idea how much the scheme would or could change the phase angle but of course it did.
So, I would ask manufactures of small AC welding machines if they would be willing to eliminate the input circuit and furnish such a regulating component.. Lou Aiken, LaMer LLC 27109 Palmetto Drive Orange Beach, AL 36561 USA tel ++ 1 251 981 6786 fax ++ 1 251 981 3054 Cell ++ 1 251 979 4648 From: John Woodgate <[email protected]> To: <[email protected]> Sent: Monday, January 27, 2003 7:56 AM Subject: High-currrent resistors and inductors - preferably variable > > One of my IEC colleagues, from a very large company, sent this enquiry: > > I am interested in locating > suppliers that can provide variable impedance elements (Ztest < Zref) > needed to test to EN 61000-3-11. The range of Ztest, at 50 Hz, may have > to be Ztest = (0.10 - 0.25) + j(0.10 - 0.25) with 75 A per phase. > I have located one supplier in the US, with a possible additional one > that may be acceptable. > I would like to have a European source if possible. Any information that > you can provided in this regard will be greatly appreciated. > > Either send me e-mail or put a message here. > My e-mail is jmw(AT)jmwa.demon.co.[DELETE.]uk > -- > 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" > 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"
