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holey stators batmam | 12 comments (12 topical, editorial)
Re: holey stators batmam (3.00 / 0) (#8)
by fcfcfc on Sun Sep 14th, 2008 at 07:20:34 AM MST
(User Info)

Hi: I find your test numbers interesting. A while back when I posted "Bill's Super VAWT" goals, I received a whole bunch of _hit from several posters about gen output expectations. Anyway, I find it interesting that between your lowest RPM 240 and the highest RPM 360 you only have a 2% drop in voltage, IE a 30% increase in RPM from 240 yielded a 28% increase in voltage. Thank you for the test coil numbers... very useful...

[ Parent ]


Re: holey stators batmam (3.00 / 0) (#9)
by blueyonder (windwoodgood at yahoo dot co dot uk) on Sun Sep 14th, 2008 at 02:44:07 PM MST
(User Info)

  hi bill thanks for the comment .
  only thing is i am not very good with maths.
   so i am not sure what your saying. is it a good thing or a bad thing.
  so far this is the only details i have from testing.
   but would like to know what other tests i can do on the bench.
  not great with maths or electronics  .or in other wards i know zilt.

 i would like to try other forms of testing .but without putting it up in the wind.
  what can i learn.
    as long as i dont need a degree . cheers bill. blueyonder.
   
its a ill wind that dos no good
[ Parent ]



Re: holey stators batmam (3.00 / 0) (#10)
by fcfcfc on Sun Sep 14th, 2008 at 05:05:18 PM MST
(User Info)

Hi:
No, I think that is good, that is the "tightness" of the NL voltage in relation to RPM... I would be curious about voltage outputs starting from 100 RPM in increments of 50, up to however fast you dare to turn it. Then you would have enough base NL voltage points to put together a nice NL voltage curve. This could be compared to a loaded stator power curve at the same RPM points later on. Those two curves together would be most interesting indeed...

.....Bill


[ Parent ]



Re: holey stators batmam (3.00 / 0) (#11)
by blueyonder (windwoodgood at yahoo dot co dot uk) on Mon Sep 15th, 2008 at 12:41:31 PM MST
(User Info)

  sure bill i can log sum data on the bench test.
  i did enjoy doing it as it did help me understand things a bit more.
  i have been doing other things and every thing is as i left it on the gen.
   i never thought to compare this rotor with with another i might make.in the future.

   but now with sum fore sight it would be good to copy down sum numbers
  and then i can always compare at a later date.
   what would be best to test a load on the gen.
   i did blow a 21 watt light bulb. but that was mega rpm. evan the ac bench motor
   was struggling . so is a battery ok or better with a resister .
   one thing i did notice was a sweet and gentile hum as it made power.
    that was sweet music to my ears.

    i am better off playing with engines at least i can understand how well its
  running and starting.  but that's off topic .
   it might be best if i put results in a diary entry.
     cheers again .John.
   
its a ill wind that dos no good
[ Parent ]



Re: holey stators batmam (3.00 / 0) (#12)
by fcfcfc on Mon Sep 15th, 2008 at 02:35:22 PM MST
(User Info)

Hi:

You blow a light bulb due to over voltage not over current because it is the voltage across the light bulb that determines the current through it (assuming enough is available). So, I would just put two 25 or 40 watt bulbs in series.... I.E. with one wire into one and out, then into the other and out, with the second wire on a switch or something... just not in parallel.. this way you will halve the voltage across each bulb and should be OK...

.....Bill

[ Parent ]



holey stators batmam | 12 comments (12 topical, 0 editorial)

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