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Wind energy => Wind energy generators => Topic started by: avr3 on November 26, 2007, 02:32:24 AM

Title: alternator for generator!!
Post by: avr3 on November 26, 2007, 02:32:24 AM
i know alternator is the worst to use to make electricity but it is a challange that i need undestand y not!

i know that in order for the alter. to create elec. it needs the rotor exited, so in return it is wasting energy, i totaly understand. but i need to try!

all i need now is to find a MEChanical switch to exiet the rotor at certain wind speed, it depends on the size of the mill.

so is there outhere a switch on and off to turn a simple toggel using wind pressure or any other ideas??  i do not want to use a electronics to do the switch just simpl mechanics. thanks

here is my though.  a fan that lifts or presses when wind increases or decresse..

thanks

Title: Re: alternator for generator!!
Post by: hansvonlieven on November 26, 2007, 02:45:33 AM
G'day,

The solution that comes readily to mind is something along the lines of an old fashioned centrifugal governor as used on steam engines. This allows you to set your device in such a fashion to engage your switch only if the speed exceeds a certain parameter.

Read up on it here:  http://en.wikipedia.org/wiki/Centrifugal_governor

Hans von Lieven
Title: Re: alternator for generator!!
Post by: pese on November 26, 2007, 09:18:49 AM
take an micro-switch  (with click contscts inside (usualle 250V 2 amps.
an fix an small karton to the contact-brass , that will be moved from the wind.
calibrate this( 2 ways possibel)
Pese
Title: Re: alternator for generator!!
Post by: avr3 on November 28, 2007, 01:40:39 AM
hey guys, thanks for the info. at this time i am taking both of your ideas kinda..

i am going to use the turbine shaft to spin the balls, that was easy..lol..  after the balls start spining and calibrated for the wanted RPM using springs or tensien of some sorts, so after that i get to the hard part witch is the switch..

all i know is to have it switch at the top of the spinn and turn off at the bottom.

so i have almost figured a way using a normal house gradual switch light fixeture that pulls with the center that connectes the Balls the only issue it the cetre is flipping spinning while it is pull a fixed handle so in bettween i need a bearing or in my case i am going to use a simple Fishing reel  i am not sure how long it is going to last put i will fill you in soon..

you may not understand all my jubrich but that is my story.

here is a rendering i put together...please feel free to pick it a part..

thanks

for the info.

 
Title: Re: alternator for generator!!
Post by: avr3 on November 28, 2007, 03:03:27 AM
here is the other idea, but i do not want to break my own rule with the use of electrocnics.

any way just an idea.
Title: Re: alternator for generator!!
Post by: Ren on November 28, 2007, 04:57:00 AM
Good luck in your attempts avr. May I suggest making the switch as frictionless and hardy as possible. As I'm sure you're aware mechanical switching is prone to wear over time resulting in failure. I built my first pulse motor with a mechanical microswitch. It worked great and gave me some insights into what was happening in my rotor. However, after a few thousand cycles the switch would fail, especially at higher speeds.

Have you considered a form of commutation? I am a little unsure as to what the purpose of your switch is when I read your posts...?
Title: Re: alternator for generator!!
Post by: Paul-R on November 28, 2007, 05:35:08 PM
i know alternator is the worst to use to make electricity but it is a challange that i need undestand y not!
i know that in order for the alter. to create elec. it needs the rotor exited, so in return it is wasting energy, i totaly understand. but i need to try!
I wonder if you shuld be thinking of a permanent magnet generator:
http://www.scoraigwind.com/pmgbooklet/itpmg.pdf
http://www.topgreen.co.uk/windpower1/pmg_alternator_const1.html
Paul.
Title: Re: alternator for generator!!
Post by: avr3 on November 28, 2007, 08:45:03 PM
i know alternator is the worst to use to make electricity but it is a challange that i need undestand y not!
i know that in order for the alter. to create elec. it needs the rotor exited, so in return it is wasting energy, i totaly understand. but i need to try!
I wonder if you shuld be thinking of a permanent magnet generator:
http://www.scoraigwind.com/pmgbooklet/itpmg.pdf
http://www.topgreen.co.uk/windpower1/pmg_alternator_const1.html
Paul.


thanks Paul, i know about the PM Gen, i just want to help the ones in Countries or Areas that can only can get a regular alternator, an d yes it is a challange but lets see what we can do!!..

regarsd

Title: Re: alternator for generator!!
Post by: Ren on November 28, 2007, 09:04:15 PM
have you seen this site?

http://www.otherpower.com/otherpower_wind_alternators.html
Title: Re: alternator for generator!!
Post by: avr3 on November 28, 2007, 11:21:09 PM
oh, yes, Thanks Ren, i have  been there and it is a great info site.
Title: Re: alternator for generator!!
Post by: Gothic on November 29, 2007, 05:53:13 AM
http://www.sae.org/technical/papers/2002-01-0829
Title: Re: alternator for generator!!
Post by: avr3 on December 09, 2007, 03:48:13 AM
here is the prototype i built. http://youtube.com/watch?v=G5r1i7hLWoA
.
note the Gearing idea i am using!! crazy and toomuch drag because it is the farthest point from shaft. anyway it will work with the right winds...at that gearing it is 15to1 ratio i think.  anyway...take a look.

regards