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Re: pwm cooling fan

PostPosted:Sun Oct 16, 2016 1:55 pm
by Geo
This link gives the English version of the above site. I wish I could read Russian though.

http://secu-3.org/documentation/?lang=en

Re: pwm cooling fan

PostPosted:Tue Jul 10, 2018 1:33 am
by Billzilla
edc_atl wrote:
Sun Nov 08, 2015 3:49 pm
noisymime wrote:How would you look to drive the fan? The boards outputs are intended to control a relay, not the fan directly. PWM won't work with the relay, so you'd need an offboard high current driver.
Glad you mentioned that, you actually beat me to the punchline.

We manufacture and maintain stock of a small module that takes care of this, very popular with the aftermarket ECU crowd.

Enclosed are schematics and so on, very compact and very easy to make it work with the same I/O output at different speeds.
Does anyone know where to get that unit? The user is no longer a member of this forum.

Re: pwm cooling fan

PostPosted:Tue Jul 10, 2018 2:07 am
by curtis12321
noisymime wrote:
Sat Nov 07, 2015 10:29 pm
How would you look to drive the fan? The boards outputs are intended to control a relay, not the fan directly. PWM won't work with the relay, so you'd need an offboard high current driver.
Can this not be done with a solid state relay and some coding?

Re: pwm cooling fan

PostPosted:Tue Jul 10, 2018 2:35 am
by Billzilla
curtis12321 wrote:
Tue Jul 10, 2018 2:07 am
noisymime wrote:
Sat Nov 07, 2015 10:29 pm
How would you look to drive the fan? The boards outputs are intended to control a relay, not the fan directly. PWM won't work with the relay, so you'd need an offboard high current driver.
Can this not be done with a solid state relay and some coding?
Probably, but I'm lazy. :)

Re: pwm cooling fan

PostPosted:Tue Jul 10, 2018 7:11 am
by dazq
Billzilla wrote:
Tue Jul 10, 2018 1:33 am
edc_atl wrote:
Sun Nov 08, 2015 3:49 pm
noisymime wrote:How would you look to drive the fan? The boards outputs are intended to control a relay, not the fan directly. PWM won't work with the relay, so you'd need an offboard high current driver.
Glad you mentioned that, you actually beat me to the punchline.

We manufacture and maintain stock of a small module that takes care of this, very popular with the aftermarket ECU crowd.

Enclosed are schematics and so on, very compact and very easy to make it work with the same I/O output at different speeds.
Does anyone know where to get that unit? The user is no longer a member of this forum.
The user you mention is departed ( RIP) !


There are many OEM that have suitable relay and pwm modules you could use eg BMW and jaguar

Re: pwm cooling fan

PostPosted:Tue Jul 10, 2018 4:10 pm
by punisher454
I have used a variable speed Volvo fan that uses a pwm signal. I used an arduino nano, and wired the pwm output directly to the fan controllers pwm signal input wire. It worked fine just like that. I also have a BMW water pump (pierburg CWA400)That can be controlled by a PWM input that I plan on using on one of my cars soon.
only problem I see having speeduino control an external pwm device is that it may use up a timer to do so.

Re: pwm cooling fan

PostPosted:Wed Jul 11, 2018 3:22 am
by Billzilla
Thanks for that, I'll have a look around.

Re: pwm cooling fan

PostPosted:Tue Jul 17, 2018 6:05 am
by Billzilla
dazq wrote:
Tue Jul 10, 2018 7:11 am
There are many OEM that have suitable relay and pwm modules you could use eg BMW and jaguar
Sorry to ask what is a silly question - What search term should I use to find such devices? Or perhaps a link to some please?

Re: pwm cooling fan

PostPosted:Tue Jul 17, 2018 2:00 pm
by dazq
Jaguar s type and x type have single and dual fan versions respectively that use pwm in,
This sort of thing but are usually sold complete with the fan motor too!
https://m.ebay.co.uk/itm/JAGUAR-X-TYPE- ... nav=SEARCH
I believe the BMW mini type is the samesirt of unit also

Re: pwm cooling fan

PostPosted:Fri Jul 20, 2018 11:38 pm
by Billzilla
Thanks. It was suggested elsewhere that I should just use a plain solid-state relay. Does that sound feasible?