From: Paul
Date: Mon, 11 Jun 2001 08:40:30 +0100
Subject: Re: [TSSP] Solenoid losses
Hi All. Regarding http://thayer.dartmouth.edu/inductor/litzj.pdf I wrote to the author Charles Sullivan to ask for advice. He writes, of our project, > From a very quick look, I think your work on this is considerably > better than anything I know of in the professional literature. He suggests a possible way to proceed on the Q factor problem, referring us to his paper, http://thayer.dartmouth.edu/inductor/sfdj.pdf which describes his Squared-Field-Derivative (SFD) method for computing the winding loss. This approach constructs a dynamic resistance matrix D, in which the elements are the coefficients relating the power loss in the winding to the squared differentials of the currents flowing in the all the windings. For small wire diameters, the D matrix can be computed just by considering static B fields, so that the result is a constant for the resonator - a function only of the geometry, not frequency. It's a very neat approach, although there are some potential problems when applied to Tesla coils, it should take us some way beyond Medhurst. He goes on to ask if we have considered submitting our work for more formal peer review and publication, and he suggests a couple of places worth trying: > the IEEE transactions on magnetics seems like one good possiblity, or > the intermag conference associated with them, > http://www.intermag2002.org > one conference to try would be http://www.iee.org.uk/Conf/PEMD/ > Then there's the "electromagnetic compatibility" society of the IEEE, > which has a journal and an annual conference > http://www.ewh.ieee.org/soc/emcs/ > And there's the annual compumag conference, www.compumag.co.uk Of course, I'll look into these, although we need to fully explore the small h/d region before we can be certain about the role of long-range Cint. Cheers All, -- Paul Nicholson, Manchester, UK. --
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.