Mark A. Corio wrote:
>
> Hi again,
> One of my current PIC projects includes high voltage (+/-100V) supplies
> derived from 110VAC mains.  Recently there was some discussion here about
> isolation vs non-isolation (I am 100% in favor of isolation for this
> application as it can not be totally insulated).  There was discussion about
> using capacitive isolation instead of an isolation transformer.  Has anyone
> done something like this for higher currents (>1 amp)??  I would appreciate
> any pointers or success/failure stories.  Thanks.
>
> Mark A. Corio
> Rochester MicroSystems, Inc.
> 200 Buell Road, Suite 9
> Rochester, NY  14624
> Tel:  (716) 328-5850 --- Fax:  (716) 328-1144
> http://www.frontiernet.net/~rmi/
>
> ***** Designing Electronics For Research & Industry *****

Capacitive isolation, I think you've got your wires crossed
Caps can isolate DC not AC
The only practical way to isolate mains is via a transformer
A power supply using caps for isolation would only be possible
using very high frequence. It would cost more and would
have limited isolation only
As you say your app. cannot be totally isolated then
a transformer looks like the only option

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