Hi,
It's an old machine with a water cooling system that I would like to improve (especially to save weight).
The current water pump is old and over dimensioned, given the bottlenecks in the tubing.
3 wires, 220v water pump, magnetic, 30W, 1,2A 1600L/h
I would like to replace the old system for a newer PC cooling kit, with a 12v pump.
3 wires, 12v water pump, 20W 0,8A
How should I do this?
Thanks
Please supply a block diagram showing all connections, including power, for the old pump system, and the same for the proposed new pump system.
Paul
3 wires, 12v water pump, 20W 0,8A
Is that a brushless DC motor (BLDC)?
Please post a link or brand name & model number.
If you have a 12V power supply at about 1A (or more) there is probably an existing relay that you can use with 12V instead of 220V.
Or, you can move the 220V motor connections over to a new relay with a 220V coil.
There is something wrong with your wattage calculations. 220V x 1.2A = 264 Watts.
12V x 0.8A is 10W.
Sometimes they might give the peak start-up current so the ratings/calculations may not be "perfect" but something seems wrong.
...The wattage and physical size should roughly correlate to pumping-power.
I would like use this water pump (or something similar):
Instead of this one:
https://m.pt.aliexpress.com/item/760913869.html
Will the one you prefer have enough cooling capability for your computer? Pretty small tank.
Paul
Maybe I could have a bigger one. But my question is how do I use a DC12v instead of AC220v?
12 volt power supply? Battery? When you show the current wiring, it will be easier to answer.
Paul
My suggestion as a first step is to plumb it into the target system, connect it to 12V (manually) and verify it does what you need it to do.
Does your PC power supply have enough 12V capacity to do what it is currently doing + this pump?
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