For those that don't understand induction motors. An induction motor
is both a trasnformer and a motor. It's really a clever idea that
recognizes that both motors and transformers are made of two coils.
The speed of the rotor is important in an induction motor so speeds
are controlled by the design of the motor. That's why multiple speed
induction motors have mutliple sets of stator windings. Which winding
you energize determines the speed. And also why messing aorund with
the voltage, particularly with controls that simply clip the sine wave
doesn't work very well. You can vary the speed by changing the
frequency. But only to a point because low frequencies don't work so
well with a transformer.
The OP here isn't interested in any information from people who
know what they are doing -- he/she/it/they are looking for something
which does not exist (a cord mounted VFD control) to try and
precisely regulate the speed of a $35 dollar consumer grade window
Let the OP figure it out on his own -- clearly doesn't like being
informed that his desired device doesn't exist, or that the fan
he wants to control won't work with the controller or that the
motors which work with VFD controllers are expensive...
The OP is ignoring all of that and is therefore a troll...
I think the point is that you initially did not seem very receptive to
the suggestion that there is not a practical solution to your problem
given the constraints you placed on the solution. Pont could have
been made without calling you a troll though.
I think the point is that Evan initially did not give a fuck about the
subject and decided then and there that it was useless to even try to
give me the information that I asked for. I've had a lot of experience
with smart asses who will simply not give proper advice and the only
advice they will give is "don't do it". Even is just one more smart ass.
Well, fuck him.
Umm... You want information on something which does not
exist for the application and device you want to redneck-engineer...
Rather than accept that INFORMATION and try to find another way
(i.e. not in a window mounted, speed controlled [with the control
cord mounted] fan) to accomplish your desire to move air quietly
you continue to ask pointless questions and balk at the fruits
of your own explorations as costing too much...
That sir is the textbook definition of trolling...
Accusing others of being a troll is a defining characteristic of
trollish behavior. Another defining characteristic of trollish behavior
is the total uselessness of the contribution to the discussion. It seems
therefore that you have some introspecting to do, Evan.
A ceiling paddle fan is an induction motor. Get a paddle fan speed control,
install it in a box along with an outlet and a cord.
Like one of these:
(Amazon.com product link shortened)08854747&sr=1-1-catcorr
You can not turn a consumer appliance with a cheap induction motor
into a perfectly adjustable device with the same precision of a VFD
First off, the variable frequency controller would cost more than the
you want to run with it...
The cheapo motor the fan is currently equipped with has several
in it which are energized in the same way a 3-way light bulb is
Low setting is a smaller winding -- Medium speed is a larger winding
Hi speed is all windings on at once...
The bigger question here is why you need to have a totally adjustable
window fan unit -- and just how insane you would be trying to obtain
something which just doesn't exist...
Oh the irony. You do realize that you just told somebody "don't do it"
it being him telling me "don't do it", and on newsgroups that deal with
subjects that have pretty much zero tolerance for that kind of bullshit,
From where I'm standing, you're no help at all, Evan. Which brings me
to my next question, can you turn a perfectly useless usenet poster into
a productive and useful usenet poster? And just how insane you would be
trying to obtain something which just doesn't exist...
YOU ARE NOT going to find a cord control capable of what you want to
do... You could build a controller to do what you want but it would
to be in a large metal box like the motor controllers for industrial
HVAC equipment get installed in... Remember (Variable Frequency
You are asking something along the lines of "how do I install cabinet
electrical equipment into an extension cord control"...
Get the picture ?
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