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Old 02-04-2022, 01:41 PM
Unclejonny Unclejonny is offline
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Default Need help with making a brushless fan into a camping fan.

Been doing some internet searching and I can't find a way to manually control the speed with a brushless radiator fan 3 or 4 wire. I think they have a built in esc. The BMW brushless fans have 2 big wires and 1 little wire going to the fan. Mercedes and others have 2 big wires and 2 little wires. My plan is to make a frame to hold the fan (kind of like a box fan) and have the fully adjustable speed control on top. But I don't know what all I need to control the speed. I have a 12v lithium battery to power it. Any suggestions? I want to do this for the efficiency of the brushless fan and it would push more air too. From what I gathered I think all I need is a low input signal pwm but not sure. And also I wouldn't know how to wire. Any good input would be highly appreciated.
Thanks!!
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Old 02-08-2022, 11:59 AM
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Nobody?
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Old 02-08-2022, 01:30 PM
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They make DC controllers for brushless fans with multiple amp and watt outputs. Not sure what your budget is

https://www.anaheimautomation.com/ma...waAk0kEALw_wcB

https://www.groschopp.com/control/brushless/
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Old 02-09-2022, 05:50 PM
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I have this fan for camping if that has decent flow and saves you the time building your own:

https://smile.amazon.com/Quick-Produ...s%2C149&sr=8-5
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Old 02-11-2022, 10:19 AM
Unclejonny Unclejonny is offline
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Thank you! I'll call those places today. And thank you for sending me a link to that fan.
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Old 02-12-2022, 10:52 AM
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Quote:
Originally Posted by Unclejonny View Post
Been doing some internet searching and I can't find a way to manually control the speed with a brushless radiator fan 3 or 4 wire. I think they have a built in esc. The BMW brushless fans have 2 big wires and 1 little wire going to the fan. Mercedes and others have 2 big wires and 2 little wires. My plan is to make a frame to hold the fan (kind of like a box fan) and have the fully adjustable speed control on top. But I don't know what all I need to control the speed. I have a 12v lithium battery to power it. Any suggestions? I want to do this for the efficiency of the brushless fan and it would push more air too. From what I gathered I think all I need is a low input signal pwm but not sure. And also I wouldn't know how to wire. Any good input would be highly appreciated.
Thanks!!
This should do the trick:

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

It doesn't go below 1000Hz but when I did some testing with the Volt fans, it seemed to work just fine:



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Last edited by andrewb70; 02-12-2022 at 10:55 AM.
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Old 02-22-2022, 10:04 AM
Unclejonny Unclejonny is offline
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That's exactly what I was looking for! Thank you!! I think that controller will be just fine for what I'm doing. I'll get it ordered.
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