paper: 4 CIM versus 6 CIM theoretical calculations

[GeeTwo]

Originally Posted by cbale2000

I'm aware that mechanically it's not critical, I was just curious as to how it affects the efficiency of the overall system. Presumably the MiniCIMs would be working harder since they would be trying to pull the other motors to a higher RPM, but I'm not sure if this would make enough of a difference in motor current to really matter.

I came up with a peak efficiency of an all-CIM drivetrain as 65%, an all-min-CIM as 57%, and a 1+1 as 61%, so no, not unless I'm missing something. The only possible issue I can think of is that when the speed is greater than the free speed of the CIM, it will be generating current rather than consuming it - I'm not sure what effect that would have on the motor controller.