Stepper motor as a generator??

[Jonathan]

Jonathan, that's one of or more likely the best DIY turbine generator I've ever seen

Thanks.. it was my A-level project. I've not found another DIY turbine with active pitch control. I went much further than required for the A-level though. I've not done anything with it for over a year now :( ... I'm intending to test the generator with lathe on VFD as that'll be a more accurate setup than using the school Bridgeport to get readings. I machined all the parts manually... no CNC.

I honestly thought about VAWT- there are some advantages of this kind of turbine- especially in urban turbulent winds.

That's what I heard, but there's so many more sources that say they are not as good generally. How many commercial VAWT's have you seen?

They are slower than HAVT so they require generator to kick at lower rpm, but without messing with some kind of reduction bigger dia generator (more magnets and coils thou) of your kind from previous post would perfectly do.

For mine to 'kick' at lower RPM you just need to increase the number of turns on the coils since the voltage is proportional to the number of turns. Just make a test coil out of anything, spin the generator at known RPM. Then you get volts per turn per rpm ... decide what cut-in speed you want and just scale it to get the required number of turns. Then work out the biggest wire you can fit in the available space ... use multiple strands if it's too big to wind easily.

What do you think about VAWT Jonathan?

Forget it... there's just more to go wrong.