Controlling fan speed on a PWC with arduino

Hi,

I am trying to control a TT 160 R1 fan with arduino.

I want to use some kind of dimmer so i can control fan speed 0-100%.

my current plan: use this AC Light dimmer
and set 0% as minimum voltage required by the fan, and 100% max output.

the issue is that after what I have read, that ac light dimmer is not suitable for this application.

So my question is: Is there a module for arduino which can support PWC fans?

Sidenote: I know the fan has 2 speed controls depending on which wire you give power, L1, L2. I do not want to use this unless controlling myself is not possible.

Hi,
Welcome to the forum.

Have you any specs on the motor, depending on the type of motor will govern how you control it.

Does the supplier have a controller of it?

Tom… :slight_smile:

Why not use the speed control designed and recommended by the maker..??
They do say a triac controller there for 3 speed.
Nothing about motor type, could be any one of a few different units.

Might save yourself a lot of problems.

In my experience, these axial fans wouldn't pull the skin off a rice pudding, regardless of all the manufacturers claims.

Not to mention the problems with ducting sizes and lengths.

This is all the info I could gather:

  • single-phase motor
  • V/hz 230 50/60
  • speed min 30W, 0.17A
  • speed max 60W, 0.27A
  • There are 2 speed inputs by just wiring power: L1, low power, L2 - Full power
  • as the circuit below shows, i think i can just control L2 input?

Skjermbilde 2020-08-28 kl. 11.42.57.png

bluejets:
Why not use the speed control designed and recommended by the maker..??
They do say a triac controller there for 3 speed.
Nothing about motor type, could be any one of a few different units.

Might save yourself a lot of problems.

In my experience, these axial fans wouldn't pull the skin off a rice pudding, regardless of all the manufacturers claims.

Not to mention the problems with ducting sizes and lengths.

I want to automate it, a speed control by the maker I would need to change it manually

Hi,
OPs image;
Skjermbilde 2020-08-28 kl. 11.42.57.png
The problem is the motor may not take to slow operation, that is why it is wired for two speeds.
As you slow a motor like that the direct cooling of the motor drops lower than the heat produced.

Tom.... :slight_smile:

TomGeorge:
Hi,
OPs image;
Skjermbilde 2020-08-28 kl. 11.42.57.png
The problem is the motor may not take to slow operation, that is why it is wired for two speeds.
As you slow a motor like that the direct cooling of the motor drops lower than the heat produced.

Tom.... :slight_smile:

Ok so you would recommend L1 L2 method?

as i see it: if i give - min 30W, 0.17A this is the lowest amount of power 1% and then 100% would be 60W, 0.27A. I dont see a reason this would not be a good solution?

Tough, L1 may actually be 30W, and L2 may be 60W

Hi,
What is the application?
Why do you want to have 0 to 100% speed control?

Tom.. :slight_smile:

It’s exhaust fan for a grow tent.

I need clean air always, but I dont want to remove too much humidity, and sometimes if temperature is too high I need 100% fan speed.

But I dont have the grow tent yet, so still don’t know if L2 is good enough for just relay switching on off. But yeah i’m worried about removing the humidity because of too high fan speed.

Thanks for taking the time for this :slight_smile: