[Lab] human powered art

[Richard Guy Briggs]

On Mon, Jan 17, 2011 at 12:20:02PM -0500, Darcy Whyte wrote:
> Hi Richard,

Hi Darcy,

> What it looks like though is that those go-kart motors are attractive. Also
> the home made generators (parts from volvo and such) look good but I think
> the go-kart is a little more accessible to me at the moment so I will
> probably look at that.
> 
> Plus if I ever get the urge to make a motorized scooter I'd have the motor
> on hand.
> 
> I'm pretty sure the steppers are too small (and the go-kart industry is
> price friendly as it's also a scaled up industry).
> 
> Not only that you get DC out of the go-kart motors which might be more
> handy.
> 
>  I was at Princes Auto yesterday and they didn't have anything like it
> floating around.

Hmmm, I had wondered if they might have anything like it...

> So I will start a prototype using one of those motors.
> 
> I guess once I get one or two of those motors I can start to look at
> different ways to drive it with human power.

So do you have a local source for them yet?  Or are you going to mail
order them?  I'd be curious to grab a couple if you do.

> -user pushes a wheel around
> -user rows
> -user pedals
> -user wears a harness and pulls cable off a spool to create rotary motion
> -user wears a harness and does squats to pull row spool. (two people could
> do a teeter totter action like that
> -user hand cranks
> -user pulls a rope like a tug-a-war
> 
> Obviously to get the big power we're going to need the legs in on this.

I suspect that something recumbent with pedals is going to be the most
efficient and comfortable.

> On Sun, Jan 16, 2011 at 8:38 PM, Richard Guy Briggs <rgb at tricolour.net>wrote:
> > 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
> > assorted steppers.
> >
> > 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
> > rate them.
> >
> > 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
> > of it.
> >
> > 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
> >
> > --
> > Richard Guy Briggs               --  ~\    -- ~\            <
> > hpv.tricolour.net>
> > <www.TriColour.net>                --  \___   o \@       @       Ride yer
> > bike!
> > Ottawa, ON, CANADA                  --  Lo_>__M__\\/\%__\\/\%
> > Vote! -- <greenparty.ca
> > >_____GTVS6#790__(*)__(*)________(*)(*)_________________
> >

	slainte mhath, RGB

--
Richard Guy Briggs               --  ~\    -- ~\            <hpv.tricolour.net>
<www.TriColour.net>                --  \___   o \@       @       Ride yer bike!
Ottawa, ON, CANADA                  --  Lo_>__M__\\/\%__\\/\%
Vote! -- <greenparty.ca>_____GTVS6#790__(*)__(*)________(*)(*)_________________