Wind energy to electric energy - Page 4 - Electronic Circuits Projects Diagrams Free

williB · 20th December 2004, 05:24 AM

Vaibhav i see on your site you are into Marconi , I used to live right down the street from where he did his "Wireless" transmissions from..
this is a bad picture , but I wound the first armature and poured the resin in .. it will be done in the morning..
i have 80 turns of 20 gague wire on there

williB · 20th December 2004, 01:11 PM

the first pic is the face of the armature

in the second pic , Arm4 , is the side shot , as you can see , it worked !!

williB · 21st December 2004, 01:33 AM

Quote:

Originally Posted by Vaibhav Birit

I have a 1.2GB hard drive(gone). It has a stepper motor, with three terminals. Can this be directly used for our purpose.

sorry, i would have answered earlier if knew the answer..

FoxyRick · 21st December 2004, 03:04 AM

Hi Vaibhav,

Three terminals makes it sound like the spindle motor (a brushless DC motor), not a stepper motor. It's not really much use for anything, except maybe as a light-duty, very nice bearing. Being a 1.2GB, it probably has two nice NIB magnets inside it.

Take a look here for some internal details of a modern drive, not the really old ones with stepper motors)

http://www.computerworld.com/hardwar...,64716,00.html

http://www.storagereview.com/guide20...tActuator.html

FoxyRick.

Vaibhav Birit · 21st December 2004, 04:50 AM

yes, you are right its a spindle motor, not a stepper motor.

williB · 21st December 2004, 05:19 AM

Yep thats what we are looking for thanks FoxyRick..

Juglenaut · 21st December 2004, 01:35 PM

Thought I share this:

http://www.aveox.com/

These are the type of brushless motors I am talking about. Spendy, but it is possible to find used ones.

bryan1 · 22nd December 2004, 05:47 AM

Quote:

Originally Posted by williB

Quote:

Originally Posted by bryan1

Eh WilliB,
I'm looking for some magnets aswell and I wonder if 15mm dia x 20mm thick would be suitable as www.oatleye.com have them under the general items page. These magnets are "Very strong NEODYMIUM IRON BORON RARE EARTH MAGNETS" quote from the webpage.
anyway I'll keep looking over here in Oz for them and if I find any I'll let ya know straight away.

Cheers Bryan1

.. due to the size and shape of the ones on that site , if you stacked three in a line , with the same polarity facing up that would work..

Eh WilliB,
Eh I found some magnets finally and they are coming from the US as the Oz ones are over $22 each when bought by the hundred. The link is www.windstuffnow.com and the site is full of windpower stuff which is top reading.
Take a look mate I'm sure you'll be impressed if ya aint seen it yet.

Cheers Bryan1

williB · 22nd December 2004, 12:35 PM

Bryan nice find..
i just looked at the site..
i really liked the ones at the bottom of the budget builders page , for $.99 cents each , thats within my budget..

williB · 26th December 2004, 12:06 PM

after some initial testing i seem to be getting 2 V peak to peak sine wave from four coils and eight magnets..
it is a real nice looking sine wave :lol:
i ordered some neodium magnets yesterday cant wait till they get here :twisted:
as it is now all i have are the magnets from home depot..

williB · 29th December 2004, 01:05 AM

update:
after reading this page
http://www.fieldlines.com/story/2004/12/26/17435/340
i repositioned the magnets , and now i am getting 4V peak to peak from eight coils and eight magnets..

Vaibhav Birit · 29th December 2004, 08:14 AM

Thats great.
But can you tell me two more things

1. What is the speed of rotation. Is it rotating by wind or artificially rotated.
2. What is the Short circuit current that is generated.

williB · 29th December 2004, 02:36 PM

Quote:

Originally Posted by Vaibhav Birit

Thats great.
But can you tell me two more things

1. What is the speed of rotation. Is it rotating by wind or artificially rotated.
2. What is the Short circuit current that is generated.

1)Yes it is rotated by hand , right now.. just spinning it..
2) dont know yet
It is still under test..
also if i could place the magnets closer to the coils i would get more voltage out of the generator..
as it is now , i spin the magnets and place them over the coils
i used a 5 1/4 hard drive bearings to hold the magnets in place , i hot glued them to one platten..
i also hot glued the coils to the other platten..
works quite well for testing..

williB · 29th December 2004, 03:05 PM

before reading this site i had the magnets evenly spaced around the platten.
http://www.fieldlines.com/story/2004/12/26/17435/340

williB · 30th December 2004, 02:26 AM

ok preliminary results are..
depending on which meter i use for current i am getting anywhere from 50 to 100 mA short circuit current @ 1.2 V by just spinning the works by hand..
i am using those glass diodes because of their lower forward voltage requirements.. in a bridge rectifier set up..with a 220uF cap across the output..

i also took apart two old western digital Hard Drives 170 MB , they each had four elbow shaped "sort of" Neodymium magnets so i connected them to the previous picture..

does it seem right that with 6V peak to peak pre rectified volts..
that i am only getting about 3.3V no load rectified volts ??

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21st December 2004, 03:04 AM	(permalink)
FoxyRick	Hi Vaibhav, Three terminals makes it sound like the spindle motor (a brushless DC motor), not a stepper motor. It's not really much use for anything, except maybe as a light-duty, very nice bearing. Being a 1.2GB, it probably has two nice NIB magnets inside it. Take a look here for some internal details of a modern drive, not the really old ones with stepper motors) http://www.computerworld.com/hardwar...,64716,00.html http://www.storagereview.com/guide20...tActuator.html FoxyRick.

21st December 2004, 04:50 AM	(permalink)
Vaibhav Birit	yes, you are right its a spindle motor, not a stepper motor. __________________ www.vaibhavbirit.bravehost.com

21st December 2004, 01:35 PM	(permalink)
Juglenaut	Thought I share this: http://www.aveox.com/ These are the type of brushless motors I am talking about. Spendy, but it is possible to find used ones. __________________ Your website has been blocked

22nd December 2004, 12:35 PM	(permalink)
williB	Bryan nice find.. i just looked at the site.. i really liked the ones at the bottom of the budget builders page , for $.99 cents each , thats within my budget..

26th December 2004, 12:06 PM	(permalink)
williB	after some initial testing i seem to be getting 2 V peak to peak sine wave from four coils and eight magnets.. it is a real nice looking sine wave :lol: i ordered some neodium magnets yesterday cant wait till they get here :twisted: as it is now all i have are the magnets from home depot..

29th December 2004, 01:05 AM	(permalink)
williB	update: after reading this page http://www.fieldlines.com/story/2004/12/26/17435/340 i repositioned the magnets , and now i am getting 4V peak to peak from eight coils and eight magnets..

29th December 2004, 08:14 AM	(permalink)
Vaibhav Birit	Thats great. But can you tell me two more things 1. What is the speed of rotation. Is it rotating by wind or artificially rotated. 2. What is the Short circuit current that is generated. __________________ www.vaibhavbirit.bravehost.com

30th December 2004, 02:26 AM	(permalink)
williB	ok preliminary results are.. depending on which meter i use for current i am getting anywhere from 50 to 100 mA short circuit current @ 1.2 V by just spinning the works by hand.. i am using those glass diodes because of their lower forward voltage requirements.. in a bridge rectifier set up..with a 220uF cap across the output.. i also took apart two old western digital Hard Drives 170 MB , they each had four elbow shaped "sort of" Neodymium magnets so i connected them to the previous picture.. does it seem right that with 6V peak to peak pre rectified volts.. that i am only getting about 3.3V no load rectified volts ??