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  HDD Motor question 
 
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john dabrowski Sep 05, 2011, 12:10am EDT Reply - Quote - Report Abuse
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I have some old small hard drives that still work but their too small to be useful anymore. My question is, if it would be possible to use the motor from the hard drives in another application. I know they run on 12v dc, would it be possible to up the voltage to 14, 16, or even 24v dc. Have any of you guys used one of these motors for a project or anything else.


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john albrich Sep 05, 2011, 01:11am EDT Reply - Quote - Report Abuse
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>> Re: HDD Motor question

The motors in the drive are a special kind of motor controlled by an electronic circuit so it's not just a matter of attaching 12V to the kind of DC motor with which you're probably more familiar.

This video looks like a decent basic overview:
http://www.youtube.com/watch?v=JsmK6QHw9xM

The details won't apply to every hard drive motor you run into but it's a starting point to see the kind of thing that's involved.


You can also try searching the internet for terms like [ hard drive motor hacks ]
Going to YouTube and searching on [ hard drive brushless motors ]

There are also various experimenter circuit websites out there and another source of info on driving brushless motors is at remote control hobbyist websites like
http://www.rcgroups.com/diy-electronics-199/
Links to some specific controller designs at:
http://www.rcgroups.com/forums/showthread.php?t=140454&highlight=five

john dabrowski Sep 05, 2011, 01:24am EDT Reply - Quote - Report Abuse
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>> Re: HDD Motor question
Thanks alot for the links! I did a little bit of googling and didnt find anything. I'm playing on putting them in an rc car, actually 4 of them, so I'll have 4 wheel drive, and if my calculations are right, and my tires dont fly apart, I should be able to hit 50-60mph at full power. I'm going to try upping the voltage a little bit, and see if I can get a few more rpm's out of the motors without burning them up too fast. Thanks again man. I'll take some pics and maybe make a video and post it when i'm done with the mod. Anyone else have some more advice/input i'd love to hear it.

Asus P5q-se plus
Intel Core 2 Quad Q9550 @3.4ghz
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2x2gb G.Skill DDR2 800
Seagate 1tb sata II
Ati All-In-Wonder HD
22" ViewSonic LCD TV as monitor
Windows 7 Ultimate 64-bit
john albrich Sep 05, 2011, 02:49am EDT Reply - Quote - Report Abuse
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Edited: Sep 05, 2011, 02:52am EDT

 
>> Re: HDD Motor question

If you're doing that kind of thing, then you should also look into is custom winding your own motor cores and replacing the magnetic cylinder with discrete neodymium magnets...it's not that hard...which is also covered in rcgroups.com

Rewinding a brushless motor can let it handle a LOT more power. For example, you can re-wind a $15 CD drive's puny little motor and use it to fly R/C airplanes, drive R/C cars, etc at speeds comparable to those attainable using a $100 R/C motor.


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