Electrical Engineering/Chandelier Design.


QUESTION: Dear Prof Cleggsan


A chandelier is a decorative ceiling-mounted light fixture. Chandeliers are often ornate, and normally use lamps. Crystal chandeliers have more or less complex arrays of crystal prisms to illuminate a room with refracted light.

Can the Chandelier product can be modified to work as a ceiling fan i.e. rotating/revolving (rpm) with a regulator ?.

A electric motor has to be fixed with the Chandelier product to make it work ?.

On a safety side, do you feel the Weight of the Glass would be taken as a precautionary measure so that the chandelier rotating speed should not exceed the desired limit ?.

Awaiting your reply,

Thanks & Regards,
Prashant S Akerkar

ANSWER: I think there are many technical and engineering obstacles to overcome if the entire chandelier is to rotate.  But not impossible.

There are many designs that have the motor and fan blades underneath the chandelier but the decorative section remains fixed and does not rotate.

There, also, ballroom rotating spheres.  These are made of a round object similar to a basketball with reflecting glass chips placed on the surface of the globe covering it completely.  As it turns a spot light is focused on the globe which makes reflection beams to bounce around the ballroom. They are used for dances and social gatherings such as a birthday party, etc.

Also, there are many forms of chandelier that rotate for effect but they do not have a fan connected to them. You can find them with a simple google search.

I suppose a chandelier could be devised where the glass/decorative pieces are attached in such a fashion as to be table enough to rotate without coming apart, thus providing the fan effect.

And, yes the weight of glass decorative pieces could suggest safety issues that would require rigorous testing under running conditions.

Hope this helps.

---------- FOLLOW-UP ----------

QUESTION: Dear Prof Cleggsan


Similar to Fan regulators, we can design and construct special Chandelier Regulators which will control the speed of the electric Motor within the Chandelier product.

For example :


1: 4 Revolutions per minute
2: 8 Revolutions per minute
3: 12 Revolutions per minute
4: 16 Revolutions per minute
5: 20 Revolutions per minute

The Chandelier will rotate at the lowest speed of 4 RPM when set at 1 and at the Highest speed of 20 RPM when set at 5.

Awaiting your reply,

Thanks & Regards,
Prashant S Akerkar

Of course. Most house fans do have speed controls built in; some are step-wise as you outlined and some are continuously adjustable.  And, most of them have a wireless remote control allowing adjustment of speed from anywhere in the room.

Relatively old technology for the ceiling fan business.  

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