We're using AC BL, what about DC BL?

[sikeston34m]

The traditional definition of AC as it pertains to electricity is "Alternating Current". Household single phase current is 60hz, or 60 cycles per second. In other words, it reverses line voltage polarity 60 times a second.

DC current, of course, only flows in one direction.

With the method that brushless ESC's use, I think a more precise term would be "chopped DC".

There are tricks from several different electrical types at work here. Yes on the 3 phase, but it's not AC current.

With Industrial 3 phase, the motors are AC AND 3 phase. Industrial 3 phase has three hot leads. They fire in a 1-2, 2-3, 3-1 pattern, much the way that your ESC sends power pulses to your brushless motor. The difference is, the frequency of the pulses doesn't change AND the power being fed is cycling AC at 60 times per second.

I hope this helps.