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Terry Syd · 03-02-2008

I've just done some more calculating. I've read that the pump uses 7 amps at 12 volts to crank out 150 psi. If my memory of Ohm's Law is correct then that is 1.7 ohms though the pump windings (correct?)

I don't want to drop the voltage too low or I'll get into an overheating condition, thus the use of pulse width modulation for the controllers so that low rates of flow can be achieved. If I limit it to a 20% drop in voltage I end up with a rheostat of .34 ohms.

This would allow a 13.5 volt regulated system to be varied from 13.5 volts to 10.8 volts.

Does anybody see any problems with this idea or my math?

03-02-2008	#5 (permalink)
Terry Syd Alcohol Holic Join Date: Nov 2007 Posts: 104	Re: Pump adjustment screw I've just done some more calculating. I've read that the pump uses 7 amps at 12 volts to crank out 150 psi. If my memory of Ohm's Law is correct then that is 1.7 ohms though the pump windings (correct?) I don't want to drop the voltage too low or I'll get into an overheating condition, thus the use of pulse width modulation for the controllers so that low rates of flow can be achieved. If I limit it to a 20% drop in voltage I end up with a rheostat of .34 ohms. This would allow a 13.5 volt regulated system to be varied from 13.5 volts to 10.8 volts. Does anybody see any problems with this idea or my math?