USES HIGH TORQUE BLADES i have just fitted a large pulley to give 7.5:1 gearing, (video to follow soon) so a rotor rpm of 150 rpm or above will operate the alternator, cuts in lower than a standard model anyway due to modifications but field coil self energizes when running fast which bolsters max output.
Also works ok with the futurenergy prop though a bit small for this unit.
These blades were the first prototype set but as you see work well, (still using them) i can modify the angles if needed but have found the optimum for best low-moderate outputs, driving my 'no field' MODIFIED Lucas 17acr units, particulary suitable for developing Countries that need modest power at low-medium costs.
Extensive electrical modifications, It was jumping beyond 40 Amps in strong Gusts initially using a Bosch 100A which is too much loading for this turbine-rotor and was stalling it dead or snapping the drive chain! .
I have opted to use a lower output Lucas Alternator max standard 36A offering smaller load & also much simpler internal design than the Bosch( which uses field pulse shift gubbins regulation).
My modifications will be used on my own Genny's.
My design 2 meter (6ft7inch) blades extract more energy from a small diameter,
What kind of alternator is this. 1-wire self exiting or other type?
I'm trying to build something similar i got custom made 1:14 chain drive, but i have 2 wire (Batt. and field) any ideas how to make this one usable? :D
CeleronS1 4 months ago
@CeleronS1 No it uses a low wattage resitor to feed a tiny bit to field initially around 0.4-0.6 Amp worked well., those 2 wire are great in a car, but they do cut in at later higher-rpm than normally, Drive wise you are about spot on, 10: or higher if possible like you plan is best, so it will cut in as lower wind speed as possible (the most common).
wind4watts 4 months ago
did you make any modifications to it?
and if you connect resistences to rotor coil does it produce electric current at slower speeds?
liviooo18 1 year ago
@liviooo18 No unfortunately not, on a car-auto they typically work at 2,500 to 6,000 shaft rpm, A good purpose made pmg (especially like the one in my videos) makes pretty good power even from 150-200rpm, you can strap a 5-6 blade plastic futurenergy fast type rotor on 7 wuill make power 'out of the box' almost, only problem is cost though there's a few available now more reasonable.
wind4watts 4 months ago
Humm how about 3-4 alternators with a serpentine belt and a belt tensioner.
frankt04 1 year ago
@frankt04 Could do if you had a very large area rotor, each pulley adds friction, another way is to use a standard 1500rp Commercial alternator, a big rotor & gear it right up, one guy in Canada I think used a car axle, and further gearing up top, a big one with French flag colours on tail. did a few Videos, though believe he had no furling so lost the blades eventually, made great power in his Vids though.
wind4watts 4 months ago