Computer Brush Fan As Generator, topic-self explanatory
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Computer Brush Fan As Generator, topic-self explanatory| praga_deesan |
 Posted: January 29, 2013 04:59 pm
 
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Newbie  Group: Members+ Posts: 1 Member No.: 37,761 Joined: January 29, 2013  |
Sir,
I am using renewable sources like wind for my project.. I need to supply 1.5 to 2 v dc to my amplifier circuit and then to load... I am using computer brush fan as source ...it just gave output upto 2.5v in ideal state when i connected to multimeter in dc mode...but when i give the output of the comp fan to my circuit..it is not working/..  note: My circuit is working well when i gave 1.5v dc supply thru DCRPS.. Please let me know whether the out of computer brush fan is dc or ac.... if dc .,what is the mistake in it.. if AC, then,what will be the design of bridge rectifier..  |
 
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| Skeith |
Posted: January 29, 2013 08:25 pm
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 Forum Addict ++ Group: Spamminator Taskforce Posts: 4,094 Member No.: 2,695 Joined: June 13, 2005 |
those brushless motors are usually 3 phase.
It can be done, but you need to remove the circuitry and install rectifiers to turn the 3 phase ac into dc. -------------------- -Barrett
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| MacFromOK |
Posted: January 30, 2013 01:26 am
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 Forum Addict ++ Group: Spamminator Taskforce Posts: 12,951 Member No.: 5,314 Joined: June 04, 2006 |
If it's a brushed motor, it's probably DC. And it measured as DC on your meter...  Not sure what you're trying to power with it, but available current will be pretty low. -------------------- Mac *
"Basic research is what I'm doing when I don't know what I'm doing." [Wernher Von Braun] * is not responsible for errors, consequential damage, or... anything. |
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| CWB |
Posted: January 30, 2013 01:53 am
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 Forum Addict ++ Group: Spamminator Taskforce Posts: 19,517 Member No.: 15,154 Joined: May 15, 2008 |
99% of the average modern computer fans are brushless ... they will not put out anything when they are spun up .
they have internal circuitry that generates the "drive" . the old (and i do mean old) "muffin" fans were a line frequency driven brushless (induction) motor ... yeah , you could spin one of those up and get maybe a volt or two at 20mA . are you certain that the fan you are using is indeed a "brushed" type ? -------------------- "Know how to solve every problem that has been solved"
R. Feynman '88 |
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| sherlock ohms |
Posted: February 02, 2013 03:09 pm
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 Forum Addict ++ Group: Spamminator Taskforce Posts: 2,764 Member No.: 26,125 Joined: September 10, 2009 |
an AC brushed motor?
 the only application i can think of resides in my wife's second drawer, poorly concealed by the outer packaging of a box of cadbury chocolates, yet unknown to me due to the tissue paper wrapping that cleverly conceals a vibrator that eclipses my dimensions.. hypothetically of course, but just sayin'..  -------------------- "Quotation marks make sentences appear more meaningful."
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| MacFromOK |
Posted: February 02, 2013 07:05 pm
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Forum Addict ++ Group: Spamminator Taskforce Posts: 12,951 Member No.: 5,314 Joined: June 04, 2006 |
Hand grinders, hand-held drills, sewing machine motors... mostly high powered and small sized stuff.  -------------------- Mac *
"Basic research is what I'm doing when I don't know what I'm doing." [Wernher Von Braun] * is not responsible for errors, consequential damage, or... anything. |
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| CWB |
Posted: February 02, 2013 09:19 pm
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Forum Addict ++ Group: Spamminator Taskforce Posts: 19,517 Member No.: 15,154 Joined: May 15, 2008 |
"mostly high powered and small sized stuff."
and hence the reference to his spouse's -*ahem*- "tool box" . -------------------- "Know how to solve every problem that has been solved"
R. Feynman '88 |
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| Skeith |
Posted: February 03, 2013 03:19 am
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Forum Addict ++ Group: Spamminator Taskforce Posts: 4,094 Member No.: 2,695 Joined: June 13, 2005 |
They are also deemed as universal and will run of AC or DC AFAIK -------------------- -Barrett
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| MacFromOK |
Posted: February 03, 2013 03:58 am
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Forum Addict ++ Group: Spamminator Taskforce Posts: 12,951 Member No.: 5,314 Joined: June 04, 2006 |
Only if designated as AC/DC, though some will run on DC for brief periods before damage occurs.
This is a common problem with cheap AC hand grinders on portable DC welders (their 120V outlets are also DC). -------------------- Mac *
"Basic research is what I'm doing when I don't know what I'm doing." [Wernher Von Braun] * is not responsible for errors, consequential damage, or... anything. |
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