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The mill is up and running
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17
comments (17 topical, editorial)
Re: The mill is up and running
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3.00 / 0
) (
#4
)
by WillH on Wed Aug 20th, 2008 at 08:22:10 AM MST
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User Info
)
Hey what sort of a DAQ is up there? What info are you getting?
Re: The mill is up and running
(
3.00 / 0
) (
#5
)
by bend1 on Thu Aug 21st, 2008 at 06:01:37 PM MST
(
User Info
)
Today is the first day we have had any real sustaining winds sense I got the mill up. I'm using an Amtech 30 motor with 3 ft blades each and its 23ft in the air. And my battery is a Wal-Mart Everstart deep cycle for now. I have the mill up and today it was turning we had some winds reaching about 10 mph. The wires coming out of the mill today showed 3 VDC. My current at that point is was maybe 30 micro amps. The battery on its own was at 12.67VDC. This is telling me that there is little if any load on the mill, is this normal? I was not sure so I unhooked the battery and connected a 25 ohm load at that point and rechecked my current when the mill started turning again. I had about 1.8VDC at the mill and at the load. I had .1 to 1.5 milliamps on the load this time. I guess what I don't know is if this is normal when a mill is connected to a battery. And will the battery start increasing its resistance as the voltage of the mill increases? Or do I have a wiring issue? We have storms coming in tonight so I am going to unhook the battery and just connect the 25 ohm resistor across the mill for tonight. So that it has some sort of load on it for now I'm worried if we get any stronger winds it might damage something.
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Parent
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Re: The mill is up and running
(
3.00 / 0
) (
#6
)
by kurt on Thu Aug 21st, 2008 at 06:17:05 PM MST
(
User Info
)
no power will flow into the battery until the windmill voltage exceeds the battery voltage then the battery will hold the mill down to its voltage and start to charge 3v is as good as nothing and the mill is freewheeling at that point. i bet you just didn't have good wind when you tested btw a 6' prop 3' per blade is to big for an amatek 30v they like props in the 4' range so you mite have a hard time getting enough speed out of your prop....
http://www.reresource.org/
IRC
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Parent
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Re: The mill is up and running
(
3.00 / 0
) (
#7
)
by bend1 on Thu Aug 21st, 2008 at 07:28:19 PM MST
(
User Info
)
Thanks, I was hoping that it was something like that becaue I could not find any problems with the wiring tonight . About the blade size of 4 ft diameter is that the optimum size for this motor? I cant remember were I came up with the 6 ft size I have now ( read it somewere in the hundreds of post here). Well it looks like I will be making some new blades tomorrow.
[
Parent
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The mill is up and running
|
17
comments (17 topical, 0 editorial)
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