The setup with the two coupled motors (data sheet) can be seen on the following image:
Since they are connected, the mechanical speeds will be identical in any case.
To observe the required parameters, the two Kucher GUIs were recorded for one measurement with a current limit of 35A in the following video.
- The ESC in the right window is the one with RPM control mode (8000RPM), this is the one which is used later as generator.
- The motor on the left is the driving one, it is set to current mode and it’s driving current is increased from 0A until 12.80A. At this point the other RPM controlled motor can’t hold the 8000RPM anymore and both motors spin up together and the test is shut down.
There is a slow motion about the spinning up part from 1:55 in the video.