Re: (ET) Snowblower motor in E12?

[Rob Brockway <GEtractor yahoo com>]

I think the speed limiting shunt may tend to create a lot of heat.  The 
amp draw for the shunt coil and the way it limits speed may put the motor 
in a very inefficient mode when it is lightly loaded.  I would bet it does 
better without the shunt if there is no motor runaway risk.
Rob

Sent from my iPhone

> On Aug 27, 2015, at 9:39 PM, Dean Stuckmann <dstuck lakefield net> wrote:
> 
> I think that heat may be a problem for the blower motor. I put one on a 
> home made sickle mower and on an 80 deg day that thing was so hot you 
> could fry eggs on it in as little as 20 minutes. And the sickle mower 
> does not take much power to operate...
> 
> Regards,
> 
> Dean A. Stuckmann
> 5432 County Road U
> Newton, WI 53063-9624
> 
> 920-901-2288
> dstuck lakefield net
> 
> 
> 
> 
> 
> 
>> On Aug 27, 2015, at 11:54 AM, CZ <cz alembic crystel com> wrote:
>> 
>> When blowing heavy wet snow I have managed to pull over 350 amps from 
>> the NiCDs at 36 volts. Assuming 300 of that was the snowblower, that's 
>> 16hp peak sustained (15-45 seconds)
>> 
>> C
>> 
>>> On 8/27/2015 12:28 PM, Rob Brockway via Elec-trak wrote:
>>> The snow blower motor that I had was a a monster.  I have oftened 
>>> wondered if anyone has done this.  It is a series wound motor with 
>>> some small windings to limit the motor speed with no load.  The small 
>>> winding drew something like 6 amps.  I think the motor can generate 
>>> 10-15 hp for short periods.  Being a series would would require a 
>>> diferent control circuit to reverse the field relative to the 
>>> armature.  You would not get as flat a speed load curve but it would 
>>> have lots of power.  You might put a switch on the speed limiting 
>>> field winding to give you speed options and increase the efficency on 
>>> the motor if you don't need to limit the speed to 3600 rpm.
>>> 
>>> --------------------------------------------
>>> On Wed, 8/26/15, Bob Brandon <bobbrandon frontiernet net> wrote:
>>> 
>>> Subject: (ET) Snowblower motor in E12?
>>> To: elec-trak cosmos phy tufts edu
>>> Date: Wednesday, August 26, 2015, 1:35 PM
>>> 
>>> I notice the snow blower motor is
>>> rated 2.5 HP @ 66 amps/
>>> My E12 has original 1.5 motor with a Curtis controller.
>>> Would it be possible to replace the original motor with a
>>> compound wound blower motor?
>>> Bob Brandon
>>> _______________________________________________
>>> Elec-trak mailing list
>>> Elec-trak cosmos phy tufts edu
>>> https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
>>> 
>>> 
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