Need some help with building a simple generator

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RayRay1132

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I bough a couple of these little steam turbines (https://www.stirlingkit.com/products/mini-steam-engine-high-speed-turbine-model-diy-project-part-science-toy), and I would like to make a 12 volt dc generator. (I just need some advice on what motor/motor type to use.) What would be the best way to do this, using a brushed or brushless dc motor? I can also probably build a gear reduction unit to get the right amount of rpms depending on which generator motor I choose.

Thanks in advance -Ray, KD2JID
 
RayRay1132 said:
I don't think my little steam turbine would have enough power to turn the alternator, I could be wrong though.
Click to expand...

I wouldn't have thought so, and you would need substantial gearing down as well. Try it with a small DC motor for a start, and see how it works.
 
RayRay1132 said:
Doesn’t the alternator also need to have a constantly powered exciter coil?
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I would have thought that's the least of your issues

There should be enough residual magnetism to make them self excited, but for a small system do you want to waste some of the energy you're producing driving an electro-magnet?.
 
Nigel Goodwin said:
I would have thought that's the least of your issues

There should be enough residual magnetism to make them self excited, but for a small system do you want to waste some of the energy you're producing driving an electro-magnet?.
Click to expand...
I'm figuring I can maybe squeeze 5-10 watts out of it to charge a battery hopefully.
 
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