Downside to running fans from a buck converter? 24V Upgrade

avensiis
Posts: 5
Joined: Tue May 26, 2020 11:59 am

Re: Downside to running fans from a buck converter? 24V Upgrade

Post by avensiis » Tue May 26, 2020 12:20 pm

Thanks for the suggestions !

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mattjames1980
Posts: 2
Joined: Wed Apr 22, 2020 6:18 pm

Re: Downside to running fans from a buck converter? 24V Upgrade

Post by mattjames1980 » Mon Jun 15, 2020 9:48 pm

wanna do this the other way with my A30M to get some Noctua fans, anyone tried running 12V fans off a 24V psu? looking at buck converters as well

Blanca21
Posts: 1
Joined: Tue Jul 27, 2021 1:17 pm

Re: Downside to running fans from a buck converter? 24V Upgrade

Post by Blanca21 » Tue Jul 27, 2021 1:24 pm

Issue with replacing 24v fan with 12v fan using buck converter
I really want to reduce the noise from the hot end fan so I bought a noctua fan and a buck converter from amazon. I was following a couple of guides for how to do this but none of them mention (and I didn't think about) the fact that buck converters not only reduce the voltage (good) but also increase the current by a corresponding amount. This will take the current over the specified max current and blow the fan. So, do I need to find a buck converter with a limited/adjustable output current as well as adjustable voltage? Or am I doing something wrong?


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Perry1148
Posts: 1
Joined: Mon Aug 30, 2021 5:34 pm

Re: Downside to running fans from a buck converter? 24V Upgrade

Post by Perry1148 » Mon Aug 30, 2021 5:38 pm

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Walters6697
Posts: 1
Joined: Fri Sep 03, 2021 1:31 pm

Re: Downside to running fans from a buck converter? 24V Upgrade

Post by Walters6697 » Fri Sep 03, 2021 1:33 pm

This works really well for me, thank you! Facing same issue here. Help is appreciated. MyBalanceNow

Battin658
Posts: 1
Joined: Wed Sep 08, 2021 5:37 pm

Re: Downside to running fans from a buck converter? 24V Upgrade

Post by Battin658 » Wed Sep 08, 2021 5:42 pm

You can still use a single buck converter to run the fans individually. To this end, simply feed the input of the buck converter with 24V.

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Laurens
Posts: 1
Joined: Tue Oct 12, 2021 5:05 pm

Re: Downside to running fans from a buck converter? 24V Upgrade

Post by Laurens » Tue Oct 12, 2021 5:07 pm

you might lose RPM control on the part fan?
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deanalee
Posts: 1
Joined: Fri Jan 07, 2022 1:11 am

Re: Downside to running fans from a buck converter? 24V Upgrade

Post by deanalee » Fri Jan 07, 2022 1:14 am

I installed my buck converters, after setting them up on a 24v power supply.
Connected up the control box fans with the converters.

I then installed my new 24v PSU.
Turned the control box on and the noise was really deafening!

It sounded like my vacuum cleaner was on the table next to me.
My control box was really vibrating which exacerbated the noise.

I had set my buck converters to 12v. Could I have had 6v fans? lol
I shall strip it down again tomorrow and retest the converters.

sigma1
Posts: 1
Joined: Thu Jun 30, 2022 10:43 am

Re: Downside to running fans from a buck converter? 24V Upgrade

Post by sigma1 » Thu Jun 30, 2022 10:44 am

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