Re: starter motors

[jcmassey@netspace.net.au]

At 08:45 PM 31/05/01 -0500, you wrote:
>There are some motors that are place on small Hydraulic pumps like the ones 
>used on power lifts for pickups and the like that would be a choice you
might 
>consider. 
>On Thursday 31 May 2001 07:05, you wrote:
>> Hi Lee and all,
>>
>> A lot of times I have wondered why starter motors can not used be for
>> traction in my bicycle. However, I know that these motors are not rated
>> continuous. What is it that makes them differ from traction motor? If the
>> applied load  is less, their current consumption is going to be less. With
>> proper cooling I must be able to use them. So why can't I then use them for
>> traction? I heard there's is a type of four pole starter motor with two
>> series winding and two shunt winding. Can I use them? Advices please!
>>
>> Prasad - aquariangenie@hotmail.com
>
>
The motor on my Essisted bike is a forklift hydraulic pump motor. 3/4 hp,
15 min. rating (at full voltage at loaded RPM), not the best efficiency,
but certainly orders of magnitude more efficient than a starter motor. A
more appropriate 'used' motor for this would be the traction motor from a
walk-behind forklift or a battery powered floor sweeper, IF you can find
one small enough (I couldn't).

The best non motor starting use I have seen for a starter-motor is when I
fitted up for a friend an air conditioning compressor with a starter motor,
switch, etc., to provide tanked air on his truck (nominally for pumping up
tyres, but next time I saw him he had 'real' air horns fitted). One
compressor pump-up gets the motor quite warm, but since it had a long time
to cool down it is still going OK four years later. I wouldn't use one for
anything else, though (except starting engines, of course).

James Massey