Yeah, bit off topic, but questions always get help here. Got a great flow and fall on the creek through a bush-block. got a 700mm pelton wheel, got a couple of F&P motors. Anyone rewired a motor to produce 240 v instead of 12/24/48v? Cheers!
tony9,
Jun 18, 6:17pm
Without rewinding it will likely be close to 240V. However frequency is going to be wrong with poor regulation. Which is why the output from those motors is rectified to DC and then feeds an inverter to get 240V AC 50Hz.
ralphdog1,
Jun 18, 8:03pm
And they are 3 phase, so the power per phase won't be that high either. How much flow and head do you have, and what length, pipe type and diameter do you think you would use for a delivery pipe?
lugee,
Jun 18, 8:49pm
Usually rewound for low(er) voltage and high current, then 3 phase output full-wave rectified to give about the DC input voltage your inverter wants.
You'll never get useful 240v straight out of the generator.
muzz67,
Jun 19, 4:57am
Thanks guys. Sounds like a bit of a mission. We're already independant with solar/batteries. Always wanted to fiddle with a hydro set up tho. Was thinking of only running a 400w panel heater of the hyrdo, to keep the chill off the cabin so the pipes dont freeze. Have run 80mm irrigation pipe down an almost vertical 15m cliiff, and reduced to a 20mm nozzle, pressure is awesome! Scouring out the soft rock. Might still set the pelton up just for fun.
sifty,
Jun 19, 5:59am
Quite 'dirty' power too (harmonics wise). If you're only feeding a dumb heater, just try it and see what you get. No harm in trying if it is only supplying a resistive element.
sifty,
Jun 19, 6:03am
I was going to try something similar, wind turbine driven F&P motor straight into decommissioned night store. The harder it blows, the more power heating the old bricks, effectively 'storing' energy.
elect70,
Jun 19, 1:47pm
Hope you have RMA consent , i went through this for a farmer who had a good stream running through his property & wanted to use small hydro generator it to heat the water for his milking shed . Cost as much in consents as the labour to instal it for him .
muzz67,
Jun 19, 4:46pm
Yep, same thought. Wont need the heater when the water runs dry. RMA? Who's gonna tell. ?
ianab,
Jun 19, 9:23pm
Maybe you could produce 230V, but regulating it and matching it to a load is going to be tricky.
Sure you have 240V coming out, then you hit the switch on your appliance, and the voltage drops because of the startup surge, and things trip out.
Run a 12 / 24 into a battery bank, then an inverter rated to power whatever load you need. The hydro can make ~500W all day, and then when you need ~1800 to microwave your dinner, you it have ready to go from a 3,000w inverter.
I would have the solar and wind linked. Keep the hydro separate.
illusion_,
May 26, 4:03am
Just have your microhydro add to your battery power. Run the heater panel off the batteries through your inverter. Simple as.
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