RE: (ET) Shunt or series

["T Humphrey" <thumphrey mynra com>]

I'm not sure about this but I think that if a series motor is kept
around it's nameplate voltage then it won't have a problem with
runaway. The problem comes from using a series motor on a much
higher voltage as is done in EV's to get much greater power out of
them.

I am going to try to use a snowthrower motor on my kids jr
draster, I will power it with much more than 36v. I currently have
6 13ah Hawkers that I plan on using i.e. 72v for a start. I hope
nothing breaks as this will probably overspeed the motor. if
successful I may go up to 144v in 12, 24, or 36v steps. Knowing me
it will probably be two 36 v steps.

I am sure I will need to modify the motor to cool it, since it
runs hot even in the winter.  Then again I may ask my
neighbors(Advanced DC Motors Inc.) if they would like to help us
out a little

Does anyone know the ratings on these snowthrower motors, or the
brush numbers?

Stay Charged!
Hump   


---------- Original Message ----------------------------------
From: Humphrey Timothy H Contr AFRL/IFEC <Timothy Humphrey rl af mil>
Date:  Tue, 27 Jan 2004 18:55:24 -0000

> 
>
>-----Original Message-----
>From: maxmatic comcast net
>To: elec-trak cosmos phy tufts edu
>Sent: 1/27/2004 11:20 AM
>Subject: Re: (ET) Shunt or series
>
>It is, indeed, a series-wound motor.
>
>Doesn't this hint that the guys at GE thought the problem of
run-away in
>a series wound is overrated? I mean, in an app where the load can
easily
>be lost (the chains do break... one has on me!) shouldn't they
have used
>another configuration? (And the motor survived, by the way, in case
>anyone was worried.)
>
>Or, ha ha, is it a little spare parts prob/stats application!?
("Chain
>broke? You'll need a new chain, and, er, lemme see, says here a new
>motor, too...")
>
>-Maxo,
>who loves the wealth cheap and available series wound motors,
>who has never destroyed one in a run-away,
>but who is careful just the same.
>
>--
>http://www.maxmatic.com/
>> Series motor.
>> 
>> - SteveS
>> E20
>> 
>> ----- Original Message ----- 
>> From: "Chris Zach" <czach computer org>
>> To: "Elec-trak list" <>
>> Sent: Monday, January 26, 2004 10:07 PM
>> Subject: (ET) Shunt or series
>> 
>> 
>> > Quick question: Is the motor on the snow blower a series
motor or a 
>> > shunt wound one?
>> > 
>> > I'm curious because I noticed that after plowing this morning the
>plow 
>> > refused to spin up. Just a little grunt and nothing. The
chute was 
>> > clear, as was the auger. The reset button was not out.
>> > 
>> > I realized the problem was the batteries were low to the
point where
>the 
>> > motor probably couldn't get it's field up and going to start the 
>> > armature. So I drove it down to the outlet, charged, and
everything
>was 
>> > fine.
>> > 
>> > Odd.
>> > Chris
>> > 
>> > 
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>> > 
>> 
>> 
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