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-   -   Designing my own Motor Cooler (https://www.rctech.net/forum/electric-road/93681-designing-my-own-motor-cooler.html)

qwerty 12-12-2005 11:43 PM

Designing my own Motor Cooler
 
Hi.

i am trying to make my own motor cooler (muchmore style) with a 12v fan and a heat sink...... was wondering what direction the fan should blow....

whats better, blow fresh air into the motor OR

blow air away from the motor, thus having the fan suck the hot air and sucking it away from the motor?


thanks

Superkarter 12-12-2005 11:58 PM

The Much More one pulls the air away from the motor. :nod:

dontfeelcold 12-13-2005 03:46 AM

Maybe those who have made coolers or can recommend what spec components should be used, should post in this forum

Birky 12-13-2005 04:01 AM

Quote:

Originally Posted by Superkarter
The Much More one pulls the air away from the motor. :nod:

The much more motor cooler pulls air through the heatsink, however not from the motor. The motor is cooled using a thermoelectric process called the Peltier process, which basically cools one side of the device (the motor end) and heats the other side (the heatsink). The fan is used to keep the temperature of the heatsink down so that you can pull the motor cooler off the motor just before the race.

AngryAsian 12-13-2005 04:02 AM

Someone correct me if i'm wrong, but as far as i know the Much-more motor cooler uses the fan to blow air directly over the large heatsink.

Not to mention the cooler uses a thermoelectric cooler to lower temperature. the fan and heatsink are simple a way to remove the excess heat.

Thermoelectric coolers use an electric current passing through a series of thermocouples to produce a net loss in temperature. Ie. the thermocouple plate gets cold on one side, and hot on the other. (the hot side is connected to the large heatsink and fan)

thermocouple units can be bought from computer supplies but are usually square and flat. Also, care needs to be taken to make sure the unit is EXACTLY the size needed. These units cool so much they can start freezing condensation from the air. not good for your motor! So a unit that is too big will have areas not touching the motor.. Ie. just cooling air.

hope that helps!

P.S the heatsink and fan are used simply to remove the heat from the unit. they are not "cooling" the motor at all!

dontfeelcold 12-13-2005 04:06 AM

So what spec peltier cooler do i need?

Birky 12-13-2005 04:12 AM

Beat you by 1 minute, AngryAsian ;)

It doesn't matter if you get some moisture on your motor either, it will not damage the motor.

If your interested in the Peltier, check out http://www.peltier-info.com/

qwerty 12-13-2005 04:12 AM

i tried a regular heat sink and a 12v fan, it didnt do jack. 1 degree at most.

i am interested in more of this peltier thingo... i searched it, but doesnt really say how to do it... or where to get the materials...

anyway i decided to convert my design to an onboard cooler whilst driving, and made the fan blow at the motor, sort of like supercharging. i'll post pics soon :nod:

Birky 12-13-2005 04:14 AM

Quote:

Originally Posted by qwerty
i tried a regular heat sink and a 12v fan, it didnt do jack. 1 degree at most.

i am interested in more of this peltier thingo... i searched it, but doesnt really say how to do it... or where to get the materials...

anyway i decided to convert my design to an onboard cooler whilst driving, and made the fan blow at the motor, sort of like supercharging. i'll post pics soon :nod:

I have a 3racing heatsink with a fan, but the fan sucks through the motor. I would assume this is so to not blow dust and dirt into the motor.

qwerty 12-13-2005 04:19 AM

Quote:

Originally Posted by b3n
I have a 3racing heatsink with a fan, but the fan sucks through the motor. I would assume this is so to not blow dust and dirt into the motor.


yeah thats what i got. i ditched the shitty fan on that, and put my own fan, blows 10 times stronger!

AngryAsian 12-13-2005 04:35 AM

Dang!... beaten to the post..
nice one b3n.
but c'mon.. mine was loooooong..
LOL..

i actually have a 3racing fan unit too.
Dunno why.. stupid to "suck" air away from the heatsink. does jack-all to help cool it. i flipped mine around. And i wired mine directly to the batt terminals. the fan comes with a pin connector for the ESC, but that's only 5-6v. The fan actually says it's a 7.2v fan!

What the hell?

qwerty 12-13-2005 04:45 AM

yeah the fan is 7.2v, so u will benifit by hooking up direct to the esc battery wires... anyway my fins on the fans all broke and the wires that connect to the fan shorted very easy....

Jack2 12-13-2005 04:52 AM

Here are some peltier devices - eBay

Birky 12-13-2005 04:57 AM

Yeah. I hooked mine up to the battery as well.

qwerty 12-13-2005 05:06 AM

so whats the recipie for making a peltier motor cooler??

Lower level: Motor Holder
Middle Level: Peltier cooler
Top level: 12v Fan


is that all?

thanks

:nod:


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