Re: (ET) Sweeper Control - deck motor powered

[David C Robie <mycroftxx1 juno com>]

Getting nicads back in sync;  I use AA's for a lot of little things and
what I do is mark em as a pair when I get them - and charge that pair
together - and occasionally check voltage after a few charges to see if
they stay in sync.   If they don't, there's usually another pair floating
around that didn't and do 'best match' voltage wise on em before
recharge.  It is amazing that, for instance, a well matched pair will do
bout 6 CD's on my player and a pair that ain't, even though freshly
charged, will do 3.  The charger should do this, after all it's 'hi
tech'.  But it don't, it puts both in series to charge darn it.   And
here we are charging our ET nicads in series.  Same problem bigger
batteries.

Dave
Weymouth MA




On Tue, 26 Sep 2006 10:31:19 -0400 Christopher Zach
<cz alembic crystel com> writes:
> JBR wrote:
> > Hi Chris,
> > 
> > You might look at the simple PWM variable speed controls used in 
> those little 
> > electric scooters.  BUT, make sure you find one rated high enough 
> current 
> > (and 36v - some are only 24v) - you might not, because I think the 
> Deck 
> > motors are about 1 horsepower - or 750 watts, where the largest 
> scooter 
> > controller I have found is for a 500 watt motor.  BUT, the 
> controllers are 
> > MUCH less expensive than(though probably not as reliable as ) a 
> golf cart 
> > controller.
> 
> A pure golf cart controller might be a little odd since the motor is 
> a 
> fixed-field motor and not a series or shunt (magnets). Still I'll 
> take a 
> look at that MC-7 one; I do want something to provide power to the 
> front 
> and rear lifts; I do not like tapping this NiCD pack. Unlike 
> lead-acid 
> it's a pain to get NiCDs back into sync even by overcharging.
> 
> Chris
> 
> _______________________________________________
> Elec-trak mailing list
> Elec-trak cosmos phy tufts edu
> https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
>