I have a BLDC motor on an autopiloted model airplane, running with an ordinary PWM-controlled ESC.
I have a feature I'd like to add which the ESC I have doesn't support, so I either want to find one that does or to learn enough to build one that is integrated with the rest of my (mostly home cooked) autopilot.
The feature I'd like to add is a mode that stops the prop and holds it in a horizontal position (it is a 2-blade prop) both to reduce drag during glides and for landing so that the pusher prop on my flying wing won't be as easily damaged by the ground.
From what I understand of how these motors work, it should be possible for the usual 6-MOSFET driver circuit to hold the output shaft in any of 6 (maybe even 12, if you leave one high side and the other two low sides on etc?) positions. Of course, without sensors, I'm not sure if it is possible to get it to that position in the first place? (I mean, if the motor were entirely off and I just connected certain leads and left them on -- with appropriate current -- would the shaft spin to that position? Or might it not have enough torque to move at all from some starting positions?)
Has anyone tried this? Thoughts or advice?