RE: Re: (ET) charging circuit

["Elie, Larry (L.D.)" <lelie ford com>]

It DOES work with a bad cap; just not very well.  Max voltage when the cap 
is bad will be about 39.5V, after days.  That's 
something like a half charge.  If you disconnect the cap (electric tape on 
the taps please) you can go back to 45+V BUT at 
a slower rate.  The failure mode seems to be a leaky (electrically) cap.

Larry Elie


-----Original Message-----
From: JAKrug EBAerospaceAndDefense com
[mailto:JAKrug EBAerospaceAndDefense com]
Sent: Thursday, February 05, 2004 7:07 AM
To: elec-trak cosmos phy tufts edu; roden ald net
Subject: RE: Re: (ET) charging circuit


 Hello All,
I was under the impression that the transformer in the elec-trak is a
Ferroresonant Transformer.
To hold the voltage constant.
Does anyone have a link to a site the explains how this thing works? (in
simple terms.)
I am at loss in understanding why the transformer will not work when the
capacitor dies.

Thanks
Jeff

Sincerely,
Jeffrey A. Krug
Test Engineer I
The Ensign-Bickford Aerospace & Defense Co.
640 Hopmeadow Street                      
P.O. Box 429
Simsbury, CT 06070
Phone: 860-843-2072
Fax: 860-843-2069
E-Mail: jakrug EBA-D com
Pager 860-802-4153 numeric


-----Original Message-----
From: roden [mailto:roden ald net]
Sent: Friday, January 30, 2004 1:26 PM
To: elec-trak
Cc: roden
Subject: Re: (ET) charging circuit


On 29 Jan 2004 at 19:49, gmbauman alltel net wrote:

> filtered by a
> capacitor.

That's not a filter capacitor.  It connects to a separate winding on the

transformer, and helps it hold a constant voltage.  I don't really
understand 
how it works, but apparently it's not really a resonant circuit -
something 
about keeping the transformer core saturated?  Sorry, best I can do.
But it's 
definitely not a filter.


David Roden - Akron, Ohio, USA
1991 Solectria Force 144vac
1991 Ford Escort Green/EV 128vdc
1970 GE Elec-trak E15 36vdc
1974 Avco New Idea 36vdc
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