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Nidec Beta V VA450DC 12v 3.3A disassembly

post #1 of 4
Thread Starter 

One of my favorite 120mm fans I have

I got this fan from PC Hub.com for $14.69


The fan has 9 blades and 11 back vanes. I really like vaned fans, since they work better than other fans for most applications. The vanes focus the airflow into a straight line.
Time for disassembly

The fan uses 2 NSK ball bearings, with a spring-washer-clip holding system. The 3-phase brushless dc motor has 12 coils and 8 poles. This gives it twice the power of a similar sized single-phase 8 pole motor, and a 20% increase in efficiency as well.

P. S. Hard-drive motors also typically use 12 coils and 8 poles. Most hard-drive motors are also made by Nidec. Just a thought on possible similarities.
post #2 of 4
Quote:
Originally Posted by MasakakiKairi View Post

I really like vaned fans, since they work better than other fans for most applications. The vanes focus the airflow into a straight line.

You're so vane - you probably think this post is about you. tongue.gif

Sorry, it's puny Monday - obligated by the OCN charter to fish where no fishnet has been stocking before.

39W 120mm 5300rpm fan that only shouts 'Hear me whine' at 64dB. Not bad. Not good either. How fast can they spin before you have to leave the server room screaming?
post #3 of 4
1- can you measure for me those ball-bearings ? (ID, OD, thickness)
2- I don't understand the "12 coils and 8 poles"
8 poles refers to the rotor's permanent magnet ?

@ MicroCat
biggrin.gif
post #4 of 4
3.9 Amps! Holy cow that's like 10 times what most PC fans require. I assume that they are not designed for motherboard fan headers.
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