Human Powered Generator to 140 watts (www video)

Hello, group, groupies, and lurkers and a happy new year to you all.

MOEPED 3 (MObile Experimental Physics Educational Demonstrator) was in
the parking lot behind this condo Christams Eve. It was the first major
project I have been able to slap together since we settled November 24,
2004. It's cramped here but the computers, video, and manufacturing now
work together.

The 600 W @ 36 V stall consumption hub might deliver 200 W of shaft
power on a good day. It can probably generate the 140 W capacity of
the 12 V inverter although that has not been proven with a load. It
cost only
a little more than the small 3 W rated brusheless AC alternator hubs
that can put out 6 W on a fast coast. It weighs much more, 20 pounds,
and has more friction, since it's a brushed, commutated
motor/generator.

ftp://users.aol.com/DGoncz/Bicycle/HappyNewYear.wmv

will show a drive-by with Christmas lights blazing at 13 W load.
The drag is unnoticeable when they kick in at about fourth gear on
level ground.

There's a little amateur guitar on the credits in the video to keep
them from getting boring. It's a Guantanamera, followed by a brief
Alegrias, for those who care about such things.

The final credit, to Objective Force Warrior, refers to the "mule"
proposed for infantry support. What a silly idea! When the mule runs
out of gas, infantry mobility goes to zero. With human power generation
and storage on a bicycle, as long as the soldiers are alive, they are
mobile and on the CCCC 'net. So this is an alternative to that. We've
had success with bicycle troops in America before.

I laced the hub to the tiny 16 inch rim with 80 mm spokes. What a
hassle. I reamed the Presta to 5/16 for the Schraeder stem to
match the other wheel and had to inflate it with a 135 degree air hose
tire chuck and MAPP gas because it's so cramped in between the big
hub, the tiny spokes and the tiny rim. I didn't feel like dragging out
the Power Pal air compressor. I have a tiny but inefficient pump that
can also dispense CO2 for mobile use; it's the only thing that fits in
there: a Second Wind pump. It uses a compact screw chuch instead of one
with a lever.

Now I can power the *brilliant* 8 W white LED rail/shipyard traffic
signal donated by John Viselli at Dialight a few years ago! This highly
efficient 110 VAC lighting component has a good beam spread for road
illumination. It hardly gets warm.

I've laced 13 sockets to the seat frame to hold C9 Christmas bulbs in
red and green. I think those are 5W each; we'll see how they feel on
the legs, and what happens on coasts.

After, that, well, how about some neon or a sodium vapor fixture?

A possivility for the next phase of development is a pedal-powered SEIG
that Dr. Majewski is helping me with. I have to drive it at sync/slip,
then use a capacitor substitution box I build and one I bought to find
the appropriate reactance.

A series ultracapacitor bank of ~40 kilojoules is ready to drop into
the rack bag; I just have to wire a trailer connector and T. Finding
heavy gage trailer wiring connectors is a problem; trailer light loads
draw much less current than this motor load. This bank will provide
some electric-flywheel effect that may even out a few small local
hills, but it's mostly to keep the generator from providing too much
voltage to the inverter on a coast and to keep the lights on when
stopped for safety.

As is, the whole thing can still be grunted onto the Metrobus bike rack
and taken anywhere on rail and bus.

Doug Goncz
Replikon Research
Falls Church, VA 22044-0394

.

Relevant Pages

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