R/C Tech Forums - View Single Post - How do I max the speed on Mamba Max Without Overheating?

09-01-2010 | 09:57 AM

#9

Storydude1

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Quote:

Originally Posted by espesso17

So your saying by having a battery current that is too small can make the esc run hot? The lipo im switching to has 30 amps

Yes. Pesky Electrons.

voltage drops, amperage goes up for a given load.. more amps=more heat built up. More voltage, less amps for the same amount of work.

discharge rate on a lipo is measured in "C" C being the nominal Charge/discharge rate. (e.G 1C discharge rate on a 1000Mah battery pack is 1 amp/Hr. 2 amps for 1/2 hour...) Add those up to a 30C pack, on a 5000Mah battery and you get Burst current of up to 150+ amps for short times.

Now, if the pack STILL drops Voltage under load(as some Lipos do) Amperage will still go up.

I'd move to a lower Kv rated motor and that will allow you to pull bigger gearing and have the same end result. Lower Kv motor will draw fewer amps for a given speed, assuming the motor is working in it's optimum power range.

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