Moped Generator... reconstructed....

[Frost]

Hi gang, i have discovert by accident a Very good generator. it started with my current transport device, a moped, Vespa Ciao.
I had egnition problems with it, mostly due to the flywheel magnets being almoust 30 years old, so i bought some Neodym magnets that was a lot smaller than the orginal flywheel magnet but they did the trick, it went from producing about 20Watt to 200+Watt, but here?s the punch line, it runs faster and no matter how hard i load the power supply from the ignition it doesn?t take any HP from the engine. then i bought as big neodym magnets as i could fit into it, that did take som of the engine power but it made over 500Watt and could still idle the engine, and again it didn?t matter how big a load it had to supply.
In the ignition there are 2 coils, one for ignition and one for power to lights. now i pulled more than 500watt one only one coil that means that my moped with only 2 HP could support more than 1000Watts if i had some other ignition to keep it running.

This is something to look into, because i really works. And it makes way more power than its input from only 2 HP.
With the 200W flywheel it would go 70 KM/t good Acceleration
With the 500W flywheel it would go 60 KM/t ok Acceleration

if any of you have an old moped standing around you should try it.

One of the reasons that this works like it does is that the generator is like a car generator just inverted.

Sorry for spelling errors, not so active in english these days, From denmark

[legendre]

First post.

Frost,

I am a mechanic, and an enthusiast of mopeds. Would you please elaborate on exactly what you have done to the magneto rotor on the Vespa? Also, please provide the name of the manufacturuer of the magneto (Dansi, Ducati, Bosch, Marelli, or?) and the model number of the magneto, if possible.

My memory says that the magnets in the rotor are cast directly into the aluminum metal of the rotor body, and so replacing them would be almost impossible. I know there are other designs where the magnets are bonded to the rotor, but is this one of them?

Finally, how are you measuring the power output, and how hot do the lighting and exciter coils inside the magneto become when outputting such high power? They are simple coils, and together they are only the size of a cigarette pack. I'd think they would be on fire with the kind of output you claim.

Best,
M. Legendre

[Frost]

The coils does?t get very hot on the 200W model, havent tryed long term load on the 600W, the magnet in the orginal flywheel is a long magnet with 2 S and 2 N poles in the normal order, N S N S, it is just glued on,and poses no problem to take out, then just buy new neodym magnets and put them in, again  N S N S order not critacal if the are offset from the orginal magnet.

But the point of this generator is that it har the potintial to make more then you put in, one of the meny cars vi have in the yard has a bad batteri so when i turn on the fan to cool the cabine it allmoust kills the engine, but no matter how much you load a moped generator it does?t take power from the engine, as i posted first 1000w on 2 HP and that is only the standard size, im am in the prosess of making a bigger model with bigger coils and more powerfull neodym magnets. but resouces are a bit low these days so ill keep you all posted on that later.

i am to an enthusiast of mopeds, only 25 years old, havent had to meny only 110 so far of diffent types.

[Frost]

should warn about when you make this mod, the power becomes 22-24Volts intead of 6-15Volts (Depending of RAMPS), 24Volts vas at approx 11000 RPM. The amps from 6 volts and up on the 200W model vas over 9 amps. so should?t have to say this since all in this forum have plenty of exp in power. 24Volts x 9Amps = 216W and again it made more than 9Amps. now picture the coils being a little bigger and whit 10x the turns with the same wire size. of course there are always losses but that in direct conversion gives 240Volts and 9Amps = 2160Watts on the same 2 HP and the same magnets. the picture i have posted it the 200W flywheel. the magnets are 20 x 10 x 4mm N-35 only, not the biggest and baddest of the neodym magnets. i haven?t made any test of how much power in terms of HP it takes to only run the engine with the flywheel but it goes faster because the 16 magnest ways less then the orginal magnet so what could be 240Volts and 9Amps (Pr Coil!!!!!) takes no more then almoust nothing in terms of HP. im am working on building a model where the power source is a 140W electric engine i have and now there are 2 Coils to make the power in the generator since there is no need for ignition...

[legendre]

Frost,

I think you're a bit off, here..

Firstly, 600W is only 0.8HP.. that is nothing like overunity.. for a 2HP engine. I suspect that if you upgraded the magnets/coils as you describe, that you would never get more than 1,500W (2HP) out of the alternator. Of course, if you installed one of the speed kits for the Vespa, you might increase the motor output by several HP.. but you'll still never get more than you put in.

Also, when you are making your measurements, are both the voltage and current measurements done under full load? Are you taking the measurements with an oscilloscope, or VOM?