Originally Posted by
baerster
Hi all, if my Conscendo has a 30-amp ESC, does that mean that as long as my LiPo can deliver 30 amps, I am OK?
If I have a 1500 mah LiPo that has a rating of 25c, my understanding is that it can deliver 37.5 amps continuously because the formula (I think) is 1.5 amp-hours x 25c = 37.5 amps. But is that correct? Maybe 37.5 is the burst/max amps, not continuous? But if my ESC is a 30 amp unit, does that means 30 amps is the max anyway that my motor can draw?
Thanks,
-Tom
Tphage gave an excellent answer, but let's look at it slightly differently:
The 30 amp rating is the maximum the ESC can pass through to the motor. If the motor demands more (and the battery can provide), the ESC has a high likelihood to fail (ie "let the smoke out").
Your battery math is correct. If your ESC was, say 50 amp, then the limit to the motor would be the 37.5 maximum the battery can provide. While not great to push the battery to the max all the time, no big harm except possibly shorter long term life. You just may not be able to provide the motor with the maximum power it might be capable of producing.
"Oversizing" the battery "C" rating and ESC Amp rating above the amount the motor/prop will ever demand gives you a margin to allow things to run cooler and have a longer overall lifespan. But it doesn't give any boost in performance. And costs more. So some is good, lots is a waste. Your system has that accounted for, already.