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Running Multiple Fans Into Single Controller Channel?

post #1 of 7
Thread Starter 
I got my new Radiator in the Fedex today and am currently chewing through the wiring nightmare of all the fans that are going into my new Rocketfish.

So the question is, can I wire three of my Medium Speed Yate Loons into one channel on my Rheobus? Will it provide enough power?

I personally have a hunch it will, as the things have small load currents and I think the controller is set up to handle much heavier stuff, but I just want to be sure before I do a lot of cutting and soldering for nothing!

I see my Physics professor cringing as we speak... I don't think he knew all that typing was actually me on OCN & IRC
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post #2 of 7
What's the maximum wattage rating on the rheobus?

It needs to be able to handle up to like 6w.

(Voltage - Start Up Voltage) * Current * 3 = Power dissipated.
(12v - 6v) * .3 * 3 = 5.4w
Edited by DuckieHo - 6/4/08 at 8:23am
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post #3 of 7
Hahaha. Oh physics how I loathe you. Well if you wanna get technical...

Na I think you'll be fine. If you're going to cut and put them together it would be in parallel (All positive on the positive wire and all negative on the negative wire). I see no problem in that. They will run regardless, just if it can't handle it, slower in an undervolt kind of fashion.
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post #4 of 7
Quote:
Originally Posted by DuckieHo View Post
What's the maximum wattage rating on the rheobus?

It needs to be able to handle up to like 7w.
IIRC the rhoebus can handle 20w per channel. I have two 120's on one channel on mine and it's running them fine at full speed. (One is a Yate ones is a TT)

Edit: Yea its 20w
Quote:
Specification :

* Power : 20 watt per channel
* Input voltage : DC 12V
* Output voltage: 0 ~ 12 V
* Output current: up to 1.67 A
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post #5 of 7
Quote:
Originally Posted by repo_man View Post
IIRC the rhoebus can handle 20w per channel. I have two 120's on one channel on mine and it's running them fine at full speed. (One is a Yate ones is a TT)
It's fine then. Each channel can handle like 9 YL-M fans.
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post #6 of 7
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
It's fine then. Each channel can handle like 9 YL-M fans.
The YL's are 3.6 Watts each, so it'd actually be 5 , but point proven.. thanks guys!

Now! To disperse the reps accordingly..
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post #7 of 7
Quote:
Originally Posted by FearMeansControl View Post
The YL's are 3.6 Watts each, so it'd actually be 5 , but point proven.. thanks guys!

Now! To disperse the reps accordingly..
Yate Loons use 3.6w. However, the rheostat does not need to dissipate 3.6w. If it did, that fan won't be getting any power at all. Since the fan start up voltage is around 6w, the rheostat only has to dissipate 6w per fan (12v - 6v). Anymore voltage and the fans won't start. Therefore, it is 6v*.3A*3 = 5.4w.
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