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BrianG
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11.18.2011, 01:29 PM

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Originally Posted by RC toy View Post
But it doesn't apply to motors, does it? What about car motors? Do I increase the efficiency by cooling it with a fan or the magnets still dissipate the same amount or power as heat?
Motors dissipate the same amount of heat regardless of any type of cooling. Actively cooling a motor can help shed that heat to prevent it from building up to the point where magnet damage can occur. However, if a quality motor is used, efficiency is higher, and there is less wasted heat to begin with.

Using a fan to remove motor heat is not a good idea if that is the only way to run it without having it overheat. The motor should be able to run without added active cooling with no problems. If not, the the motor is too small or simply wrong for the application.

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So what's about the perfect temperature for lipos?
IIRC, right around 90-95*F.
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RC toy
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11.19.2011, 07:06 AM

OK, my 1520 runs around 130 F. Will i get some extra run time if i cool it down to 115 F? I suppose it isn't worth because it already running pretty cool...


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sikeston34m
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11.19.2011, 11:20 AM

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Originally Posted by RC toy View Post
OK, my 1520 runs around 130 F. Will i get some extra run time if i cool it down to 115 F? I suppose it isn't worth because it already running pretty cool...
No. Additonal cooling doesn't change how much energy the motor uses or how efficient it is.

In fact, if you add a fan, it will lower your runtime slightly.

Additional cooling only "saves" your motor, since it allows it to operate within it's "safe" zone.

Your setup sounds ideal just the way it is.
   
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lincpimp
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11.19.2011, 07:04 PM

Yeah, 130f is fine. I have run motors cooler and warmer than that. Just want to stay under 150f. Also keep in mind that some areas of the motor will heat up more than others so it is always a good idea to temp multiple areas of the motor, and go with the highest reading.
   
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hemiblas
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02.01.2012, 08:04 AM

Looks like the guys at HK love the idea.
http://www.hobbyking.com/hobbyking/s...ard_2pcs_.html
   
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02.01.2012, 02:16 PM

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