<div><div>Sorry I was up to my eyeballs for a few days there...</div></div><div><br></div><div>It's looking like it will be mail order to get a go-kart motor or two. Let me know if you want one or two and I'll up the order.</div>
<div><br></div><div>Your right, a bicycle configuration is probably the easiest. I was thinking of the size though. I'll try a few different things and see what emerges.</div><br>
<br><br><div class="gmail_quote">On Tue, Jan 25, 2011 at 12:25 AM, Richard Guy Briggs <span dir="ltr"><<a href="mailto:rgb@tricolour.net">rgb@tricolour.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
On Mon, Jan 17, 2011 at 12:20:02PM -0500, Darcy Whyte wrote:<br>
> Hi Richard,<br>
<br>
Hi Darcy,<br>
<div class="im"><br>
> What it looks like though is that those go-kart motors are attractive. Also<br>
> the home made generators (parts from volvo and such) look good but I think<br>
> the go-kart is a little more accessible to me at the moment so I will<br>
> probably look at that.<br>
><br>
> Plus if I ever get the urge to make a motorized scooter I'd have the motor<br>
> on hand.<br>
><br>
> I'm pretty sure the steppers are too small (and the go-kart industry is<br>
> price friendly as it's also a scaled up industry).<br>
><br>
> Not only that you get DC out of the go-kart motors which might be more<br>
> handy.<br>
><br>
> I was at Princes Auto yesterday and they didn't have anything like it<br>
> floating around.<br>
<br>
</div>Hmmm, I had wondered if they might have anything like it...<br>
<div class="im"><br>
> So I will start a prototype using one of those motors.<br>
><br>
> I guess once I get one or two of those motors I can start to look at<br>
> different ways to drive it with human power.<br>
<br>
</div>So do you have a local source for them yet? Or are you going to mail<br>
order them? I'd be curious to grab a couple if you do.<br>
<div class="im"><br>
> -user pushes a wheel around<br>
> -user rows<br>
> -user pedals<br>
> -user wears a harness and pulls cable off a spool to create rotary motion<br>
> -user wears a harness and does squats to pull row spool. (two people could<br>
> do a teeter totter action like that<br>
> -user hand cranks<br>
> -user pulls a rope like a tug-a-war<br>
><br>
> Obviously to get the big power we're going to need the legs in on this.<br>
<br>
</div>I suspect that something recumbent with pedals is going to be the most<br>
efficient and comfortable.<br>
<div><div></div><div class="h5"><br>
> On Sun, Jan 16, 2011 at 8:38 PM, Richard Guy Briggs <<a href="mailto:rgb@tricolour.net">rgb@tricolour.net</a>>wrote:<br>
> > On Sat, Jan 15, 2011 at 06:12:24PM -0500, Richard Guy Briggs wrote:<br>
> > > On Fri, Jan 14, 2011 at 07:14:29AM -0500, Darcy Whyte wrote:<br>
> > > > I would like to make a human powered generator for an art project.<br>
> ><br>
> > > > I am curious if a couple of NEMA 34 motors is large enough to capture<br>
> > all<br>
> > > > the power that a human can generate.<br>
> ><br>
> > > Do you have a link for your NEMA 34 motor specs? I've seen anywhere<br>
> > > from 50W up to 500, so it sounds like those might work!<br>
> ><br>
> > > > I'm suspecting that a stepper motor is a good candidate to make the<br>
> > > > electricity. I think the first part of the project is to make up some<br>
> > BOMs<br>
> > > > that show what motor to use, the RPM that it would require and parts<br>
> > for a<br>
> > > > rectifier and whatever else is necessary to operate in these<br>
> > applications.<br>
> > ><br>
> > > I've got lots of small ones, so I can try some tests and see. I<br>
> > > wouldn't have thought they would work because the rotor I thought was<br>
> > > unmagnetized steel.<br>
> ><br>
> > I now understand that NEMA 34 is a mounting plate standard.<br>
> ><br>
> > So, looking through my box, I have one NEMA 34 motor and four NEMA 23,<br>
> > plus about eight NEMA 17 or smaller as well as a bunch of other smaller<br>
> > assorted steppers.<br>
> ><br>
> > The NEMA 34 is a Matsushita 1HHS-486CS, 6V, 2.2ohm, 1.8 deg/step 6-wire<br>
> > unipolar. I can't find any info about it on the net. My guess is it<br>
> > its max rating is around 36W, maybe double that depending on how they<br>
> > rate them.<br>
> ><br>
> > Hooking up a bridge rectifier across each coil, using a cordless drill,<br>
> > I was able to get .5A short circuit and beyond 12v out of it open<br>
> > circuit. Using various loads, I think I was able to get as much as 12W<br>
> > out of it. It wasn't exhaustive, but I think that was somewhere near<br>
> > the peak. I may have been able to get more with a higher speed.<br>
> ><br>
> > One of the NEMA 23 motors is a Matsushita 1HHS-457CH 24V, 26ohm,<br>
> > 1.8deg/step 6-wire unipolar. Didn't find anything on it either. Again<br>
> > my guess is 48 or maybe 96W.<br>
> ><br>
> > Short: 0.16A, Open: 170V Most I was able to get was about 8 Watts out<br>
> > of it.<br>
> ><br>
> > These motors look pretty underpowered compared with some of the specs<br>
> > I've seen on the net... This isn't surprising since I think these are<br>
> > 20 years old.<br>
> ><br>
> > Darcy, do you have any part numbers or specs for your steppers?<br>
> ><br>
> ><br>
> > > slainte mhath, RGB<br>
> ><br>
> > slainte mhath, RGB<br>
> ><br>
> > --<br>
> > Richard Guy Briggs -- ~\ -- ~\ <<br>
> > <a href="http://hpv.tricolour.net" target="_blank">hpv.tricolour.net</a>><br>
> > <<a href="http://www.TriColour.net" target="_blank">www.TriColour.net</a>> -- \___ o \@ @ Ride yer<br>
> > bike!<br>
> > Ottawa, ON, CANADA -- Lo_>__M__\\/\%__\\/\%<br>
> > Vote! -- <<a href="http://greenparty.ca" target="_blank">greenparty.ca</a><br>
> > >_____GTVS6#790__(*)__(*)________(*)(*)_________________<br>
> ><br>
<br>
slainte mhath, RGB<br>
<br>
--<br>
Richard Guy Briggs -- ~\ -- ~\ <<a href="http://hpv.tricolour.net" target="_blank">hpv.tricolour.net</a>><br>
<<a href="http://www.TriColour.net" target="_blank">www.TriColour.net</a>> -- \___ o \@ @ Ride yer bike!<br>
Ottawa, ON, CANADA -- Lo_>__M__\\/\%__\\/\%<br>
Vote! -- <<a href="http://greenparty.ca" target="_blank">greenparty.ca</a>>_____GTVS6#790__(*)__(*)________(*)(*)_________________<br>
</div></div></blockquote></div><br>