temperature sensor for brushless motor

CT

Any electronic wizards out there have any ideas on how I could run a brushless motor and esc of a temperature sensor , a simple on off would do

Alex · Posted: Fri Jun 13, 2008 3:42 am Post subject:

What are you trying to achieve Colin, a motor that slows down when it gets close to a temperature ?
_________________
Alex

CT · Posted: Fri Jun 13, 2008 4:21 am Post subject:

Hi Alex
I want to be able to control an electric fan (brushless ) to cool the engine on the Hirobo project , at the moment I have it mixed with the throtle servo but thought about trying to switch it with a thermostat instead

Alex · Posted: Fri Jun 13, 2008 4:27 am Post subject:

have a look at CSM's CarbSmart it has a servo output controlled by temperature.
_________________
Alex

Rap60carbon · Posted: Fri Jun 13, 2008 5:25 am Post subject:

Maplin do a kit of parts to build one.
Either switch on or off at required temp
Don't know if it would work with three wire brushless

http://www.maplin.co.uk/module.aspx?ModuleNo=220003&doy=12m6#overview

or could use a thermistor to make fan speed
up as temp rises

Hope this is useful

Derek

CT · Posted: Fri Jun 13, 2008 6:36 am Post subject:

Good thinking Alex if the temp range can be adjusted then it could be just the ticket. At the moment I`m strugling to keep the engine at a constant temp , I think a thermostat might help here`s some pics of the unit on the test bench , I can post a vid of the starter and engine running if any one is interested .

CT · Posted: Fri Jun 13, 2008 6:39 am Post subject:

Thanks Derek but getting a signal for ESC is the problem

Rap60carbon · Posted: Fri Jun 13, 2008 6:41 am Post subject:

just use themistor then. can be wired to give variable voltage relative to temp. or use normal motor for fan

Alex · Posted: Fri Jun 13, 2008 6:45 am Post subject:

Lets here it Very Happy

now if you let the starter stay engaged you could turn it into a generator and by the time you have completed your flight your batteries will be all charged ready for your next flight.
_________________
Alex

CT · Posted: Fri Jun 13, 2008 6:54 am Post subject:

That wee motor would be doing some revs if were left engaged could maybe sell some to the national grid !!!! . Brushless motors are just so much more efficient shame to use old technology . Could a servo tester be used on the ESC having never owned or used one I dont know ??

CT · Posted: Fri Jun 13, 2008 7:51 am Post subject:

Had a lok at the specs for a carbsmart unfortunetly it dosent work below 100 degrees which is a bit hot for a petrol four stroke