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zeropointbug · 04.04.2007, 03:00 PM

WOW I did a bench run of the motor, almost full throttle with 16.5 volts. The motor got so hot I could only touch it for barely 1/2 second.

The esc on the other hand never got warm at all, the heatsink seemed like it was a a couple degrees warmer than it was before i started (10 mins). I looked at the eagletree, it consumes almost 140 watts no load, running just about full throttle, so almost all of that power is wasted as heat, 140 watts is alot!

The heat spreader on the other set of FET's got about 45 C , to the touch, just a guess, but that bottom set just stayed VERY cool.

What temp would the motor be if i could only touch it for 1/2 second? I hope i never got it too hot. :013:

	(#17)
zeropointbug Z-Pinch racer Offline Posts: 3,141 Join Date: Nov 2006 Location: SK, Canada	04.04.2007, 03:00 PM WOW I did a bench run of the motor, almost full throttle with 16.5 volts. The motor got so hot I could only touch it for barely 1/2 second. The esc on the other hand never got warm at all, the heatsink seemed like it was a a couple degrees warmer than it was before i started (10 mins). I looked at the eagletree, it consumes almost 140 watts no load, running just about full throttle, so almost all of that power is wasted as heat, 140 watts is alot! The heat spreader on the other set of FET's got about 45 C , to the touch, just a guess, but that bottom set just stayed VERY cool. What temp would the motor be if i could only touch it for 1/2 second? I hope i never got it too hot. :013: “The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens