Arduino AC DIMMER for Celling Fans

Other Hardware General Electronics
1

Can any one kindly share a tested schematic for AC DIMMER for controlling fan's speed. Specifically Celling fans please

2

If the other post is a duplicate, I am deleting it.

3

Sorry sir, I was not sure about the correct category so posted in multiple categories

4

Sorry sir, I was not sure about the category so posted in multiple categories

5

start here
http://homemadecircuitsandschematics.blogspot.no/2012/04/how-to-make-simplest-triac-flasher.html
and here

In a final build you'll need a resistor that can be controlled from MCU
something like this

and a simple IR receiver that will allow you to remotely control your fan

6

Will this also work for Celling Fans as they are inductive loads?

7

I have never tested, but a google search for "triac motor speed control" (pictures)
shows that is OK to use those AC motors

8

Thank you. It will be a great help if you can comment on the following also please
Will any of these can work?

  1. http://www.instructables.com/id/Arduino-controlled-light-dimmer-The-circuit/?ALLSTEPS
  2. http://www.instructables.com/id/AC-Arduino-dimming-circuit/step2/get-an-IRF730-from-Mouser/

Also, if you can comment on the following also please

http://www.inmojo.com/store/inmojo-market/item/digital-ac-dimmer-module-lite-v.2/

9

It looks like they all can do service., But i think i'll selected a triac variant. (the two looks similar)
then to be aware:
..MY AC-outlet is rated 230V. then *sqrt(2)=330V. If I happen to turn on main just at top if period, i'll probably get a transient to add anoter 100V+. So I'd select a rectifier bridge rated 600V ! (china quality use the 400V-type)
The triac should also be chosen 600V. 10A+ (25A will be super!)
If possibele. A small heatsink will be good.
....
(keep fingers away from live lines..)
Last hint. Continue search - read about other experiences.
Be creative

10

Ok. Thank you :slight_smile:

11

hbtalvi:
Can any one kindly share a tested schematic for AC DIMMER for controlling fan's speed. Specifically Celling fans please

You cannot use a triac style AC "dimmer" circuit on a ceiling fan motor. Usually, their speed is controlled by placing different value capacitors in series with a winding.

You could setup a few relays and use them to switch in different capacitors to vary the speed, but forget about a "dimmer". It won't work.

12

http://cache.freescale.com/files/microcontrollers/doc/app_note/AN3471.pdf
Thees fane are rare where I live. (I have not ever used one.)
Page 9-10 (link) indicates that it IS possible to control theese motors using triacs.
Maybe there can be as issue at startup to garantee enough momentum to get the fan spinning.
.. so MORE expert knowledge would be a goot thing here. I'm not one of then as I've never tried this on slow spinning motors