[Lab] human powered art
Richard Guy Briggs
rgb at tricolour.net
Sun Jan 16 20:38:59 EST 2011
On Sat, Jan 15, 2011 at 06:12:24PM -0500, Richard Guy Briggs wrote:
> On Fri, Jan 14, 2011 at 07:14:29AM -0500, Darcy Whyte wrote:
> > I would like to make a human powered generator for an art project.
> > I am curious if a couple of NEMA 34 motors is large enough to capture all
> > the power that a human can generate.
> Do you have a link for your NEMA 34 motor specs? I've seen anywhere
> from 50W up to 500, so it sounds like those might work!
> > I'm suspecting that a stepper motor is a good candidate to make the
> > electricity. I think the first part of the project is to make up some BOMs
> > that show what motor to use, the RPM that it would require and parts for a
> > rectifier and whatever else is necessary to operate in these applications.
> I've got lots of small ones, so I can try some tests and see. I
> wouldn't have thought they would work because the rotor I thought was
> unmagnetized steel.
I now understand that NEMA 34 is a mounting plate standard.
So, looking through my box, I have one NEMA 34 motor and four NEMA 23,
plus about eight NEMA 17 or smaller as well as a bunch of other smaller
The NEMA 34 is a Matsushita 1HHS-486CS, 6V, 2.2ohm, 1.8 deg/step 6-wire
unipolar. I can't find any info about it on the net. My guess is it
its max rating is around 36W, maybe double that depending on how they
Hooking up a bridge rectifier across each coil, using a cordless drill,
I was able to get .5A short circuit and beyond 12v out of it open
circuit. Using various loads, I think I was able to get as much as 12W
out of it. It wasn't exhaustive, but I think that was somewhere near
the peak. I may have been able to get more with a higher speed.
One of the NEMA 23 motors is a Matsushita 1HHS-457CH 24V, 26ohm,
1.8deg/step 6-wire unipolar. Didn't find anything on it either. Again
my guess is 48 or maybe 96W.
Short: 0.16A, Open: 170V Most I was able to get was about 8 Watts out
These motors look pretty underpowered compared with some of the specs
I've seen on the net... This isn't surprising since I think these are
20 years old.
Darcy, do you have any part numbers or specs for your steppers?
> slainte mhath, RGB
slainte mhath, RGB
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