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Bryan's 4Kw motor Conversion Part 2 The testing
ruddycrazy:
So with a downwind wind turbine is the motor (in my case) mounted in line with the centre of the tower or offset like when using a tail ?
I still need to source a USB-C cable as I got a new phone and without that cable no pic's can transferred so will get in the coming days so I can put a few pic's up.
Now as the output of the motor conversion is 36mm Diameter I'll be using a conlock and next time I'm down the hill I'll grab one and I'm on making patterns for the pulley setup so will need to get them cast and machined up.
It will some time before I get the cable as inflation is running rampant and my plan is just use some some 400 amp welding cable so 3 runs of that will cost a pretty penny and I'll see how my tax return next goes and by playing it right may just get enough to splash out on the cable.
Cheers Bryan
kitestrings:
Yes, for a downwind turbine the powertrain is in line with the tower axis. The off-set for an upwind turbine is to present a moment relative to the tower for furling. For a machine of any size you will need to consider another means of overspeed control, such as power yawing, blade-pitching/feathering, tip-brakes, dynamic or mechanical braking, or in the case of the Proven design a "coning" rotor.
I'm not familiar with the term "conlock", is that the same as a keyway, or a coupling (spline, jaw, Oldham)? Is there gearing, or a gearbox anticipated?
My preference is upwind, with a tail. Good luck.
Mary B:
--- Quote from: ruddycrazy on August 02, 2022, 04:28:06 AM ---So with a downwind wind turbine is the motor (in my case) mounted in line with the centre of the tower or offset like when using a tail ?
I still need to source a USB-C cable as I got a new phone and without that cable no pic's can transferred so will get in the coming days so I can put a few pic's up.
Now as the output of the motor conversion is 36mm Diameter I'll be using a conlock and next time I'm down the hill I'll grab one and I'm on making patterns for the pulley setup so will need to get them cast and machined up.
It will some time before I get the cable as inflation is running rampant and my plan is just use some some 400 amp welding cable so 3 runs of that will cost a pretty penny and I'll see how my tax return next goes and by playing it right may just get enough to splash out on the cable.
Cheers Bryan
--- End quote ---
I email my pics to myself. Then move them to a pictures sub folder in my email program. Gives me a backup copy of every picture in case Imgur eats them...
ruddycrazy:
Kitestrings a conlock is a parallel lock with 2 opposing internal tapers that tighten to lock the coupling to the shaft. I used one on my first motor conversion with the 3 metre blades and it was still in new condition 7 years later when the blades failed.
Now with a motor conversion they can only supply the max current the copper can handle then the eddy currents come into play and the current tapers off even the rpm is still there so basically they are a bullet proof design.
Now as this project is using a 4Kw motor I reckon the best output I will see will be around 2.5-3 Kw before saturation comes into play.Now after-all as no one to date has done a downwind design with a motor conversion my idea is build this as strong as I can and just see if mother nature can kill it 8)
I do have an 11Kw motor sitting here telling me when is it my turn and my contact for neo's is back on track so that is a later project to get onto, but I do think that one will be powered by a stationary engine as the weight factor is simply too great for what I can do on the farm.
Cheers Bryan
kitestrings:
'Conlock', I see now. We used something called a keyless bushing to attach the stator bracket to the spindle shaft. It sounds very similar.
My bias, but I would always recommend a means of controlled shut-down from the ground; ideally one that doesn't rely on wiring or electronics. The problem can be if the rotor becomes imbalanced due to icing, a bearing fails, or if somehow the rotor breaks free of the generator. A run-away turbine is frightening to witness (I've seen a few) and quite dangerous. And unfortunately, Mother Nature is patient (time's on her side), but will rise to this challenge.
I don't mean to be a downer, but do be safe. Good luck with it. ~ks
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