Re: (ET) tiller motor as generator?

[Chad Bush <bushman165s aol com>]

You can control the output voltage of the induction "generator" by 
varying the field
voltage. If you use it as a generator, depending on how you are driving
the armature, you will most likely have to spin it twice as fast to
generate any kind of useful power. You should energize the field coil 
BEFORE
spinning the motor AND the maximum amount of power will be generated
when the field voltage is at it's maximum, but is also load dependent. 
Keep in mind that these
motors have ratings and if succeeded, will lead to insulation
breakdown, commutator separation, etc.

Billy is correct. If you are trying to generate for re-charge of the 
pack, you will need something to regulate the voltage down. The 
generating motor will adapt to that load, but may not transform that 
power ratio to current very well. There is an electrical power 
generation principle from the 40s or 50s called the Kramer system. 
Basically, the power you are generating from a DC motor that is being 
rotated will only backfeed a small percentage of the power used (and 
lost) to perform that rotation. Even if it was advantageous, DP&L and 
others wouldn't dare measure it and give you a credit!

The series-wound motors would require exciting the armature to get it 
going, and then require a constant and limiting load while it's running 
so that it doesn't "run away" and implode itself. Without a load, it 
would increasingly generate its' own power through its' own field.

Explanation correct and enough? Anyone?

Chad

-----Original Message-----
From: Robert Troll <roberttroll hotmail com>
To: elec-trak <elec-trak cosmos phy tufts edu>
Sent: Wed, Sep 12, 2012 9:40 am
Subject: Re: (ET) tiller motor as generator?


You cant leave us hanging after making a statement like that! I
understand that a drive motor could be used as a gen as long as you
applied 36v to the field. But what is this about controlling the output
amps via the field?


> Date: Tue, 11 Sep 2012 21:55:15 -0400
> From: The CZ Unit <cz alembic crystel com>
> To: elec-trak cosmos phy tufts edu
> Subject: Re: (ET) tiller motor as generator?
> Message-ID: <504FEB83 1040602 alembic crystel com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 9/11/2012 8:55 PM, Robert Troll wrote:
> > Is it possible to use the ET tiller motor as a generator? I would
assume
> > that one would need a charge controller at a minimum to put power
back
> > into the battery pack. Any idea on how many amps the tiller motor
could
> > produce? Or is this just a really bad idea...
>
> I think the tiller motor is a series wound, would be a pain. Better
to
> use something like a drive motor, you can pretty much control the
output
> voltage via the field voltage and get as many/few amps as you need.
>
> C







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