Why thwe Direction of Rotation of a TABLE Fan & CEILING Fan
are different?
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Answer Posted / vns surianarayanan
In general engineering most of the threads are right handed.
So it is more economical to thread righthanded thread
instead of left handed thread which is slightly costlier.
Coming to the direction of rotation of the ceiling fan, the
stator is fixed on to the hung member from the ceiling, is
generally threaded on to the stator.
During the function of the fan rotation, it is preferable
to have the reactional force experienced by the stator to
be clock wise so that the threaded joint is not loosened
and lead to any untoward accidents.
On the other hand a table fan's stator is not threaded
along the axis of the rotor and hence the direction of
rotation is not a problem.
As people are more used to clock wise rotation, the table
fan is also designed to rotate clock wise.
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HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.
