My 4 footer "Jerry Rigged"

[Devo]

It is 130 wraps of #17 wire 6 coils / 8 Mags each set of 2 coils will be rectified seperate & then parelled together. the coils are supposed to be 1/2" thick but they are closer to 9/16.

I could have maybe went with 16 Gauge.

It is a tsr 6 prop & cut in is geared for 400 RPM

Here are some pic's of my lil campmate 100-lol the little beast it is going on my brothers camper.

Frame

 

Magnet Rotor

Stator(kind of rough looking)

Prop

Devin

[Devo]

Assembled (partially)

[hiker]

looks great--single rotor??

whats the power output?

should work great on the camper--try and park in a level area--it does affect the furling somewhat if you dont.......

[Dave B]

Thanks for sharing your project, looks great and like you have been having fun for sure. Let us know how it goes, single rotor ?  Dave B.

[Devo]

It is a single rotor, 8 magnets 1 X 2 X .5.

I haven't got test figures yet in the wind but one pair of coils today came out at 460 rpm for 12 volts instead of 400 but I haven't rectified all 3 & paralleled them yet.

That 1 set of coils rectified & shorted made about 1.2 amps at either 120 rpm or 60 rpm ,can't remember know(to much Bacardi..)I will retest after work tomorrow.

I am going to build a movable,foldable tower to test it about 10 feet high, hopefully I will get some accurate info later next week.

Devin

[Flux]

Assuming that you measured 12v ac at 460rpm. your peak dc will be 1.4 x 12.

Cut in speed will be 460/1.4 or 330 rpm. This seems about ideal. If it is a bit on the slow side you can space the stator away from the magnets  but I think you are going to be fine as you are.

Nice looking machine.

Flux

[Devo]

Thanks Flux, I had rectified that set of coils -will there be any voltage gain when all 3 are paralleled? or just amperage gain.

I had one coil move out of place a bit - I am hoping it is the one I tested as I thought I would be an easy 400rpm cut in as I had it figured for 125 wraps at 400 rpm so I went with 130 to be able to open the gap if needed.

Devin

[Devo]

I have all 3 coil pairs rectified & paralleled. I get between 4 & 4.4 volts  at 120 rpm this should put me between a 340 & 400 cut in.

One question I have ,is amperage linear? If I get 1.17 amps at 60 rpm (shorted) at 120 rpm would it be 2.34 amps?

Devin

[Flux]

If you rectified one pair of coils then the peak of that would give the cut in speed.

If you measured average dc with a meter then the meter would read .63 x Vmax .

Your cut in should be ok.

Shorted amps don't mean much anyway. You are in the land of the unknown with jerry connection.  If you could manage to measure the resistance of a pair of coils, measure the true cut in speed and measure the current into a 12v battery at say twice cut in speed it would be useful information. If you don't have the facilities to measure these things then I am sure it is going to work perfectly well.

I suspect that into a short the current will rise directly with speed. With a battery that will no longer be true.

Flux