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4hv.org :: Forums :: High Voltage
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microwave oven fan spinning wrong direction?

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alf
Thu Jul 07 2011, 06:16PM Print
alf Registered Member #3925 Joined: Fri Jun 03 2011, 10:50AM
Location:
Posts: 121
hey,

i took the (part that is attached to the shaft, the metal cylinder) out of a microwave oven fan shaded pole motor, and when i
put it back together, it spins in the wrong direction!
im almost certain that it used to spin clockwise, but now is spins anti-clockwise, and it blows air backwards.
see the wikipedia article - Link2 , it says the motor in the picture should spin clockwise, as i thought, but mine definately isnt doing this :S, maybe there is something that couldve fallen out when i dissassembled it?
(the shading coils are still there)

btw, which is better, sucking air through the fins of a heatsink, or blowing?
cuz i wanna use the fan to cool my zvs driver heatsinks.

thanks. Alf.
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Arcstarter
Thu Jul 07 2011, 07:28PM
Arcstarter Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
You probably put the rotor back in backward.

There is no difference between sucking and blowing assuming the amount of air it moves stays constant.
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Dr. Dark Current
Thu Jul 07 2011, 07:52PM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
If you want to cool just one thing (eg a heatsink), IMO it is better to point the fan directly at it, so it gets more airflow of cold air.
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alf
Fri Jul 08 2011, 07:05PM
alf Registered Member #3925 Joined: Fri Jun 03 2011, 10:50AM
Location:
Posts: 121
Arcstarter wrote ...

You probably put the rotor back in backward.

There is no difference between sucking and blowing assuming the amount of air it moves stays constant.

hey,

yeahh i turned it round, and it works :D

ahh right :)
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