Andrew_L26 Posted June 27, 2017 Posted June 27, 2017 Hi all, I'm currently wiring in my custom ecu and I wish to use the computers aircon control (ability to disable it on wide open throttle etc.) And I was wondering what sort of current the magnetic clutch will draw. I was going to put it on a relay using a low current output from the ecu to trigger it however I have a spare 3A output from the ECU and I was hoping that this would be enough to drive the magnetic clutch (so I can avoid another relay) any idea how much current the clutch draws? Cheers, Andrew Quote
Groundhog Posted June 27, 2017 Posted June 27, 2017 Found this useful guide. If you check the resistance on your coil you can calculate the amperage. http://www.vehicle-airconditioning.co.uk/aircon-compressor-clutch-does-not-engage-even-with-a-12v-supply-to-it/ Andrew_L26 1 Quote
CBR Jeff Posted June 27, 2017 Posted June 27, 2017 Ohm's Law. Look it up. The equation you need is I=V/R. Simple maths. Jeff Andrew_L26 1 Quote
Andrew_L26 Posted June 28, 2017 Author Posted June 28, 2017 Ohm's Law. Look it up. The equation you need is I=V/R. Simple maths. Jeff Haha thanks guys, this is why I nearly failed my electrical engineering class! Quote
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