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RE: Re: (ET) charging circuit
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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