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Re: self-C comments


Are you saying that the isotropic capacitance of the toroid should equal
the isotropic capacitance of the secondary coil (+ self capacitance of the 
secondary
coil?)?
                                   Barry

 ----------
|From: "tesla-at-poodle.pupman-dot-com"-at-PMDF-at-PAXMB1
|To: Benson Barry; "Tesla-list-subscribers-at-poodle.pupman-dot-com"-at-PMDF-at-PAXMB1
|Subject: Re: self-C comments
|Date: Friday, August 30, 1996 1:35AM
|
|<<File Attachment: 00000000.TXT>>
|From MALCOLM-at-directorate.wnp.ac.nzThu Aug 29 22:41:31 1996
|Date: Fri, 30 Aug 1996 09:38:56 +1200
|From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
|To: tesla-at-pupman-dot-com
|Subject: Re: self-C comments
|
|Hi all,
|         I think there might be an optimum terminal radius of
|curvature to match the energy storage in the primary cap. I have
|found that if the terminal has too high a breakout voltage for the
|Ecp, no matter how long you run the coil for, streamers can never
|break out. Indirectly, this also shows that (leaving air-charging
|effects aside), there is a limit to the terminal voltage that can be
|reached based on bang size, single or repetitive. Perhaps we should
|try and quantify what that optimum curvature is to make a design more
|complete first off. It may also be that if a large terminal is
|required, the secondary inductance should be scaled to match its
|capacitance. This approach would IMO reduce a design to more
|fundamental considerations.
|     One other thought I mentioned awhile back on Steve's list was
|that one could choose a secondary coil winding height based on bang
|size also. This pretty much sets the secondary design in concrete.
|
|What does everyone think? Could we try nailing this one?
|
|Malcolm
|
|PS - slight addendum to my post on the solid state neon transformer.
|It would definitely pay to check whether there is mains isolation in
|the transformer before trying it as a CW supply. This type of power
|factor correction/current limiting scheme is most cheaply implemented
|with a series choke and shunt switch element, so isolation might very
|well not be there. To get around that would require a ferrite or air-
|cored coupling transformer. Perhaps somebody who has access to these
|could check it out.
|