Re: 80V Toroid & Ferrite Beads

--- In CAD_CAM_EDM_DRO@yahoogroups.com, JanRwl@A... wrote:

> In a message dated 12/9/2003 12:14:19 AM Central Standard Time,
> admin@i... writes:
> Since it's a center tap transformer you can run the windings in
> parallel.
> How???

It's not actually center tapped - it is a dual secondary
transformer. See the picture at
http://www.coilws.com/Toroidal%20Power%20Tx/Toroidal_Pwr_dim.php

It is actually 2 independent 40V windings. If you want 80V,
you connect the two windings in series (connect 4 to 5, take
power from 3 and 6). That would give you 80V AC at 9.37A.
After rectification and filtering you would get 113V DC at
about 6.6A.

To use it in parallel, connect 4 to 6, and 3 to 5, and take
power from 3 and 6. That gives you 40V AC at 18.8A. After you
rectify it you'll have about 56V DC at 13.2A.

56 Volts is not a bad fit with the Gecko. There's little to
gain by pushing the limit of the drivers - especially since
the voltage may rise 10% or so at light load, and another 10%
if you have high line voltage.

All in all, I'd say he picked the right transformer, even if
he did it for the wrong reason. ;-)

John Kasunich