Re: (ET) Question for the EE types

["Christopher Zach" <cz alembic crystel com>]

To be honest, just how much energy would you save? I have found that speed
is not stable going up and down hills in speeds 1-3 (E20, 1-2 E15) so I 
just
select the right gear and spend 99% of my time in speeds 3 and up (where it
is most efficient)

C

-----Original Message-----
From: Charlie [mailto:medievalist gmail com] 
Sent: Sunday, June 24, 2012 3:55 PM
To: Rob Brockway
Cc: Elec-Trak
Subject: Re: (ET) Question for the EE types

Thanks, Rob, I was wondering about that; the toaster is obviously capable 
of
carrying huge amps, but the little wire-wound ceramics under the dash don't
look like they could handle much current at all.

Today I discovered that my varistor is exploded.  Remarkable that the
I-5 still works, although certainly not optimally.

--Charlie

On Sun, Jun 24, 2012 at 9:27 AM, Rob Brockway <GEtractor yahoo com> wrote:
> Keep in mind the power loss with resistors used with the field is 
> trivial.
 Resistors used with the armature is significant.
> Rob
>
> Sent from my iPad
>
> On Jun 22, 2012, at 5:43 PM, Charlie <medievalist gmail com> wrote:
>
>> In at least three places in the Elec-trak's original circuitry, 
>> voltage is being dropped by resistors which waste a portion of the 
>> power as heat.
>>
>> In theory, could a circuit be designed to substitute a less lossy 
>> voltage converter (buck-boost maybe?) using the original wiring and 
>> connectors?  A "plug in" replacement for that card full of resistors 
>> under my dashboard, or a "bolt in" replacement for the toaster?
>>
>> I'm aware that an Alltrax would make this unnecessary, but I've got a 
>> late model I-5 in reasonably cherry condition and I don't want to 
>> install a potted controller (admittedly if I had a field reversing 
>> relay I'd drop in an Alltrax in a heartbeat).
>>
>> --Charlie
>>
>> _______________________________________________
>> Elec-trak mailing list
>> Elec-trak cosmos phy tufts edu
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