i treid using this TRÅDFRI Driver för trådlös styrning, grå, 10 W - IKEA with the ct dev driver as a fan speed controller and it somehow worked i need to put it at atleast 30 percent to avoid startup stall but it works
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I’m not an electrician, or fire marshal.
But I think you could end up damaging your LED dimmer, your fan, or both. Or worst case, starting a fire. Maybe that’s less likely with a DC fan than an AC fan. Maybe not.
But bottom line, just because this setup provides adjustable power to your fan doesn’t mean it’s doing so safely.
And could you please change the title of this thread? I’m sure you don’t intend to offend anyone deliberately, but you’ve used a pejorative term nonetheless.
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its an ikea product im sure that they have enough failsafes its a dc fan so you arent getting inductive loads. Im sure itl be fine the controller is rated for 10w given huge brand thats a conservative estimate as people will plug in larger loads and the fan is rated for 24v*0.25a =6 w. The thing is not overworked. You really mean rednecks would be offended by the term redneck engineering
I hope you know enough about electrical engineering and device manufacturing to know what you’re talking about.
Yes, that’s the term I’m referring to.
In the context of this Internet forum, with people participating from around the world, who don’t actually know each other, can’t see each other and lack many other contextual clues, I have no idea who would end up being offended by it.
Why use a term that could be misinterpreted as offensive, even if that’s not what you intended?
That’s why I suggested you change it.
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The people who see themselves as rednecks arent the people who get offended by words.
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The point I’m trying to make is that no one person can reasonably know, or claim to know, what other people, or groups of people, think or feel.
Evidently you disagree.
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Then, there's the thought and grammar police.
(Expecting this post to be deleted. They're a sensitive bunch. I got one deleted for WuFlu.)
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They certainly tried to have it deleted but the forum has good moderators. Can we go back to talking smart home not politics
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Sure, we’ll agree to disagree. Let’s talk electrical safety then.
Can you elaborate?
That may prove to be a problem for two reasons (at least). First, there is an inrush or startup current for DC motors. Second, if something were to cause the fan to stall, then current would also remain at a high level until failure.
It may work for some time and never prove to be a problem, but please understand that the fan load is not comparable to the expected LED load. It is not a good practice.
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it can supply about 0.4 amps at lowest speed stall it draws 0.07A as for top speed stall it draws 0.35A. So even in worst stall it does not draw over the limit so you can see why im not that concerned
This sounds incorrect to me. Again, I’m not an expert, but some quick googling suggests others who know their stuff would disagree with this sentence. Here are a couple examples.
Hopefully someone that is an expert can chime in. But for other non-experts like me reading this, I’d strongly suggest keeping what I said above in mind:
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yes there is inductance but if you know you basics on ac and dc inductance dosnt do anything when the power is steady. im not scarerd of it as its a 120mm fan it wouldnt really have the power to cause any major harm
When the power is steady, yes. But I believe the issue noted on the sites I linked to is when the power is switched on or off.
People use normal powerbricja to supply 120 mill fans all the time its nothing new. Even normal wire can create this kind of inductance
I suppose I missed this in your prior post, but this is a PC case fan? Not a ceiling fan.
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Yes but it runs on 24 v which seems strange for a pc fan
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I never got that either. LOL...totally missed that it was a PC case fan.
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The fans are for other devices like cabinets or PSUs, your PC power supply does not supply 24V.
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Is there a reason why you needed to control the fan speed?
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