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Old 14th March 2010, 09:20 PM   #1
Ryssen is offline Ryssen  Sweden
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Default Regulate an AC table fan?

How do I regulate an AC 220v table fan from 0-100%.
Schema?
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Old 24th March 2010, 07:20 AM   #2
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Triac based fan regulators are readily available in the shops.
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Old 24th March 2010, 08:09 AM   #3
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Quote:
Originally Posted by Ryssen View Post
How do I regulate an AC 220v table fan from 0-100%.
Schema?
Google "ac fan speed controller". There are lots of hits.

You cannot use a standard AC light dimmer because of the voltage / current phase difference in an inductive load.
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Old 24th March 2010, 03:21 PM   #4
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Analog Fan Speed Control | Free Circuit Diagram
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Old 24th March 2010, 07:17 PM   #5
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Originally Posted by moray james View Post
That is for 12V DC fans, as used in PCs, for example.

OP is looking for mains DESK fans 110/230 AC.
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Old 24th March 2010, 08:21 PM   #6
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Don't know what level of performance you are looking for, but look to the TT guys for cheap techniques: make a Wien Bridge oscillator with a power opamp and use a stepup transformer at the output to step up the voltage to 220VAC.
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