On 12/22/2012 11:30 AM, Chris Tromley wrote:
For the lift, how big a deal is it to just run it on 36V? If it only
runs for a few seconds at a time and has plenty of cool-off time, why
would it hurt? If it is a problem, I wonder if you could use a cheapo
off-the-shelf scooter controller?
Honestly? I don't know. It probably would be ok, the problem is the lift
current breaker would probably fuse instantly if it tried to open due to
overload, that would be a problem.
Hm. Actually I have a bunch of apart-lift motors, I'll give it an honest
shot. The question is how do we current-limit it so the overload can
work? Maybe bypass it completely and use a 5 amp circuit breaker instead
of a fuse? What would be a good auto-reset 5-10 amp circuit breaker?
How common are 36V-to-12V DC/DC converters that would be suitable for
the lights? Are there any 48V input models that would still work with a
sagging 36V pack?
I used to use a Vicor DC-DC that would put out 12 volts for the um
E-meter and lights. But one morning I came out and found it had
literally blown up, which was odd. Might have been over-voltaged, but it
should have been able to handle up to 50 volts input.
Where I really need to limit current is on the sweeper. The motor on
that is just too darn fast, it beats up the brushes and the grass. Maybe
I could get a much smaller pulley or something.