Dimmer to control ventilation motor

[Onni 1]

I'm trying to figure out if I can control a ventilation motor with dimmer 2. To control the motor speed.

 

The manual of the motor says "The speed is adjusted either with a thyristor or a transformer regulator." it's translated, so hopefully the terms didn't get mixed up.

Googling the topic gives a bit mixed results.

 

So can I control this with dimmer, or what would be the best way to control this? (via Z-wave)

 

Here are some documents of the motor, mine is 125C

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[Tim__ 126]

The short answer is no. Motors are not a supported load type for dimmer 2. 

 

I found a DC motor fan (ECM type) that has a separate control input, where changing voltage 0 to 10v controls the fan speed. A smart implant supplies this signal.

 

Like this one  

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From the data sheet, I can't tell if your fan can be controlled the same way

Edited February 7, 2024 by Tim__

[Martin_N 154]

12 hours ago, Tim__ said:

 

 

I found a DC motor fan (ECM type) that has a separate control input, where changing voltage 0 to 10v controls the fan speed. A smart implant supplies this signal.

 

Attention... Smart Implant does not supply a 0-10V signal! He can only monitor.

For example, Qubina Flush Dimmer has a 0-10V output.

[Tim__ 126]

Yes, you are quite correct @Martin_N. I should have said that I use a Fibaro RGBW 2 device to supply the 0-10V required.  And actually, the signal is PWM, so the voltage is an average, but this works for the Phresh fan.  I use the Smart Implant for someting else.

[Onni 1]

On 2/7/2024 at 10:37 PM, Tim__ said:

The short answer is no. Motors are not a supported load type for dimmer 2. 

 

I think I need the long answer

I purchased dimmer 2 and connected it to the motor and it works fine, speed is adjusted. If you're just referring to official support then, ok. But is there any practical reason why I shouldn't use dimmer 2 to control it? (Since it seems to work)

[Tim__ 126]

Inductive loads (such as motors), where the phasing of current and voltage are out synch, can fry semiconductor devices (like triacs) by short circuiting the silicon.  Not sure exactly what semiconductor is being using in Fibaro devices, but I can only assume that is why the Fibaro manual says their devices only support resistive loads.  For on-off switching of inductive loads (likes motors and solenoids), a slave relay is recomended (the Fibaro switches the relay, relay switches load.)  And yes for those that may comment, technically the relay coli is an inductive load, but it is a pretty small current and the Fibaro device copes ok.  Perhaps Onni your fan similarly draws only a small current and therefore works ok (for now??)

[Onni 1]

Didn't test for a long time, but the motor is rated for about 70W. For a motor that's fairly small amount in my opinion, but considering scale of led lamps it's huge. So the only drawback is that my fibaro dimmer might get fried in the process at some point? If that's the only problem, I think I will give it a go and see how long it will work.