a6_quattro Posted June 10, 2016 Report Share Posted June 10, 2016 HiIs it possible to control a engine fan with pwm?I would like to start the fan slowly so I don't stall the engine.RegardsHans Quote Link to comment Share on other sites More sharing options...
JonoP Posted June 10, 2016 Report Share Posted June 10, 2016 Hey mate, I was just about to post this exact same topic.You can indeed run the fan via PWM and with a solid state relay. The hurdle that I am not sure about is if the PWM ramps on at a reasonable pace or just comes on hard. I really want to ramp it on slowly over 3 seconds or so. I hope Link can sort this out. Would be perfect for fuel pumps too. Quote Link to comment Share on other sites More sharing options...
Simon Posted June 12, 2016 Report Share Posted June 12, 2016 It will activate to the duty cycle request the moment the conditions are met.However it is a 3D control table so you could set one of the axis to be timer and ramp in the duty cycle over time. Quote Link to comment Share on other sites More sharing options...
JonoP Posted June 13, 2016 Report Share Posted June 13, 2016 (edited) Absolutely perfect Simon. Thanks so much.I was going to do an axis on battery voltage, and have it pull out duty as the battery voltage drooped.But your way is much better. Edited June 14, 2016 by JonoP Quote Link to comment Share on other sites More sharing options...
JonoP Posted June 14, 2016 Report Share Posted June 14, 2016 (edited) Here is what I think will work better than my last post. Edited June 14, 2016 by JonoP Quote Link to comment Share on other sites More sharing options...
gojira Posted June 18, 2016 Report Share Posted June 18, 2016 if you whant an easy PWM control for electronic fan and pumps, you can use the Power-io solid state relay's, prize is good, very solid stuff. i have 4 of them at home, will use them for fan and electronic waterpump Rich RDE 1 Quote Link to comment Share on other sites More sharing options...
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