Quote:
Originally posted by Serum
from as far i know, they downgrade the sample frequency (lets say from 38 to 12 khz) with the startup of the rotor. once the rotor spins, the esc is capable of determining the position of the rotor.
(i've got this PCB layout here that is developed like this) it uses the ST7mc1 (not that that has got anything to do with this)
this controller uses a standard startup procedure for making the motor start. it start on a certain frequency, with a fixed voltage and current, and once the communication signal is capable of determining the possition of the rotor, the esc steps up to his normal 'sample' frequency.
it does reading/communication from the motor with a 1mhz signal to determine the possition of the rotor. (on the unpowered poles)
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Let's start from scratch, tell me how motor and ESC works. It would be very clear where we are and what is what. It would be great if you cover relation between PWM and switching frequency as well.
Artur