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Old Oct 29, 2011, 11:25 AM
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Originally Posted by Gedexas View Post
Technically, they are three phase AC motors, we just run them on DC, hence the speed controller. It's easy to confuse the two, and not knowing it won't make a difference anyway.

Now, I'm thinking of a crash I had with my first RC plane ever. About a decade ago I had a motor-glider with a Graupner 400 in it. When building it, I never soldered those capacitors on, one day it dove nose first into dirt, that's probably why. I miss that thing.
I thought it was a brushless DC motor that we use? It has electronic commutation as mentioned above, but the current only goes one way. The commutation doesn't change the direction. Well maybe... in a star-winding?

Brushless DC motors (BLDC motors, BL motors) also known as electronically commutated motors (ECMs, EC motors) are electric motors powered by direct-current (DC) electricity and having electronic commutation systems, rather than mechanical commutators and brushes

Regardless from that - the capacitors are to eliminate radio interference.
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