Flandrs Posted March 13, 2020 Report Share Posted March 13, 2020 Hi I'm going to use a electric waterpump that i wan't to run with pwm control as i don't have any possibilties to have a thermostat. I have a Hella solid state relay and going to wire it 85 n/c 86 aux 7 pwm 30 + battery 87 + pump Now to the setup for the ECU, how should i set it up? What frequency and so on?? Anyone who could help me out with that? startad 2020.pclr Quote Link to comment Share on other sites More sharing options...
Confused Posted March 14, 2020 Report Share Posted March 14, 2020 It'd help to know which pump you're using, but I posted in the above thread with my settings for the Pierburg CWA pump. Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 14, 2020 Report Share Posted March 14, 2020 As for your wiring, pin 30 will need to be connected to a relay that switches on with ignition. With it connected direct to battery as you propose when the ignition is off you will get a back feed through the ECU. As for settings, generally you would set up a GP PWM, set some conditions so it only turns on above a certain temperature, then in the PWM table you would have ECT on one axis and possibly RPM or boost on the other to vary the speed of the pump with temp and load. Frequency needs to be determined by trial and error, it depends on the motor. Usualy 100-500Hz will do for a water pump, the motor will sound most happy when you have it right. Quote Link to comment Share on other sites More sharing options...
Flandrs Posted March 18, 2020 Author Report Share Posted March 18, 2020 Wiring is Done and working i have a hella solid state relay so you think 100hz would be fine? The pump is a Davies and Craig Thanks for helping me out Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 19, 2020 Report Share Posted March 19, 2020 9 hours ago, Flandrs said: so you think 100hz would be fine? Yeah I would think around 100-400Hz would be the ballpark it would be happy. Quote Link to comment Share on other sites More sharing options...
Flandrs Posted March 24, 2020 Author Report Share Posted March 24, 2020 Thank's, i have it at 150hz now and it seems to work =) Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.