RC-Monster Forums - View Single Post

BrianG · 01.03.2007, 09:14 PM

@jhautz: Lol. This time the answer was simple. :)

@crazyjr: I really don't know. That might be part of it.

It's like the MM ESC is saying: "Hmm, the rotor didn't turn. I'll just give it more power! Hey, it still didn't turn?! Well, I'll give it all I have!". And if the rotor still doesn't turn, the ESC heats up like crazy and possibly blows.

Don't forget, when a motor's rotor isn't turning, the only thing limiting current is the DC resistance of the coils, which is quite low. A rotor turning through the magnetic field generates back EMF in the coils, which increases the resistance (actually "impedance" when you start getting into AC).

	(#11)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	01.03.2007, 09:14 PM @jhautz: Lol. This time the answer was simple. :) @crazyjr: I really don't know. That might be part of it. It's like the MM ESC is saying: "Hmm, the rotor didn't turn. I'll just give it more power! Hey, it still didn't turn?! Well, I'll give it all I have!". And if the rotor still doesn't turn, the ESC heats up like crazy and possibly blows. Don't forget, when a motor's rotor isn't turning, the only thing limiting current is the DC resistance of the coils, which is quite low. A rotor turning through the magnetic field generates back EMF in the coils, which increases the resistance (actually "impedance" when you start getting into AC).