We quite literally have nothing to connect Y capacitors to...so cannot use them. Would you agree?
- - - Updated - - -
..*....*..*....*..*....*..*....*..*....*..*....*..*....*..*....*..*....*..*....*..*....*..*....*..*....*..*....*..*....*
Woops, I’ve just realised that if I make our negative return conductor our chassis ground, then this will mean that the chassis and frame of the drone will end up conducting current along with the negative return conductor.
Also, the downstream Brushless DC motors and inverters are likely to be using a chassis ground, which will likely be coupled to their power and return conductors via Y caps, as well as 1 Meg (say) resistors to stop chassis ground from getting induced up to a high voltage. Indeed the Inverters and BLDCs will need a chassis ground as they won't be able to connect their power return directly to chassis for the same reason that the chassis would end up conducting return current.
As such, we will need to have, would you agree(?), a separate chassis ground on the PCB, directly under the DCM module, and hence we will need to have Y capacitors connected to this -And use Common mode chokes aswell.
- - - Updated - - -
Please confirm that if say we connected circuit negative return directly to the metal outer chassis of the power supply in one place only....that would still be a nightmare as the chassis would then basically act like an antenna, spitting EM noise out all over the place?