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Re: pwm cooling fan

PostPosted:Sat Jul 21, 2018 6:41 am
by dazq
Billzilla wrote:
Fri Jul 20, 2018 11:38 pm
Thanks. It was suggested elsewhere that I should just use a plain solid-state relay. Does that sound feasible?
A solid state relay meant for AC will generally not work on DC, the output triac or thyristor when switched on will stay on. They need the zero crossing on the supply being switched in order to turn off.
You need a relay that is meant for DC to ensure correct operation

Re: pwm cooling fan

PostPosted:Sat Jul 21, 2018 9:23 am
by Billzilla
That one is a DC SSR, not AC.

Re: pwm cooling fan

PostPosted:Sat Jul 21, 2018 1:30 pm
by curtis12321
Hella also makes an appropriate DC SSR , if your load isn't too many amps

https://www.amazon.com/HELLA-H41773001- ... B000VU5FPE

Re: pwm cooling fan

PostPosted:Sat Jul 21, 2018 8:52 pm
by Billzilla
Thanks - That could be a good thing as well.