The 60 rpm cut in seems to check fairly well for 80 turns using 12 coils. I find that #14 will go in with a stacking factor of only about 25% so he probably had room to have used thicker wire or 2 in hand. I agree that it is too slow and too high resistance but he has these things to face later when the wind picks up.
This is going to have to furl below 1500W to avoid frying but it will probably stall very badly so it may be controllable.I can only think that the wind is even less than he thinks, it ought to be doing something at 6mph with such low cut in.
Flux[ Parent ]
The 44v that I previously stated was across 2 of the phases, later posting said 24v from one phase to ground. My mistake with initial post.
Danb,
Yes I think that you are right about the stator, looks like another mistake on my end - I think I used the page where you made a test coil using single strand. But later on you actually made coils with 2 in hand, 59 turns.
I have a sneaky suspicion that essentially I am stalled out. The winds out here have been gusting to 15mph and not much difference in voltage output.
Other than rewinding the stator any suggestions? Although that may be my only recourse.
Dan[ Parent ]
After thinking about my situation I think that there is no choice, and the lesser evil is to redo the stator.
Well this one was really good practice! After all I have tons of climbing experience, I know that the davit crane and telescoping tower work, and all the components fit well.
I still have the original mold, it needs some work but that is where I will start, then re-wind coils (correctly this time) and recast stator.
Thanks again for all the help/advice but this one is a do-over!
Dan Lenox[ Parent ]
Blades can change everything. To have the same performance as what the Dan's have done you would need to duplicate everything exact. It's possible you could have a very respectable set up of your own as is with adjustment. Maybe not the opinion of others here or even the best way to go but I have worked the variables for quite some time to tweak my own system which is unique also (direct heating). You can always wind another stator. Just my thoughts, Dave B. [ Parent ]
Confusing day.
I looked back on my project pages and initially bought two 500' spools of #12 wire, and two 800' spools of #14 wire. My parts list page wrongly stated that I used #14 for the coils, however the ongoing project page said that I used #12.
I looked in my garage and found the spools of #14!
So initially I did make coils out of 80 turns of #12 (one in hand) and not #14.
Do you think that this changes anything? Or is the stator redo inevitable?
Even with it well stalled you should still be getting a few amps at 15mph. If you still can't measure anything you have a measurement problem and you need to sort that before messing about with new stators.
If you by any chance have access to the 6 phase connections, try it in delta or Jerry connection and that should bring the cut in up to something reasonable. If not then try a big increase in air gap, get the speed up to a point where it at least comes out of stall in low winds and try some line resistance to get it up to a better speed in high winds.
The #12 wire is not too bad, it's not going to give the best results in high winds but it may do what you want and give good enough results in normal winds.
Just to prove things for now, drop off one rectifier lead, it will not stall single phased. If you still cant get current and the speed comes up you have other problems to sort before going off to build new stators. The thing is to collect as much information with what you have, before starting out on a rebuild.
I don't think you are so far off that it won't work, just keep investigating and sorting data. It must surely be doing 4A or so even hard stalled at 48v in a 15mph wind. I still am not convinced that you haven't got a measurement problem.
