Posted 09 September 2002 - 11:14 AM
Thanks in advance.
[Edited on 9/9/02 by Herman]
Posted 09 September 2002 - 07:38 PM
As this is an integral fan / motor unit, there is every godd chance that you can vary the speed of the fan by varying the voltage applied to it. There are small triac based fan speed controllers for fans that are very similar to light dimmers, but they are not quite the same. They have additional phase shift built in to the tribber circuit. If you try a light dimer, you may find that it doesn't work, however I am sure that the light dimer manufacturer would also make a fan controller.
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Posted 15 September 2002 - 12:02 AM
Posted 21 September 2002 - 10:02 PM
1-You must apply 90 to 100% voltage at start to ensure proper start acceleration (the fan starts with a load applied).
2-You cannot allow applied voltage to drop below 80%. This should satisfy your half speed requirement.
3-The rating on the dimmer must be at least 6 times of rated full load current. Motors have a higher starting current than when running.
Posted 08 October 2003 - 01:48 AM
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