BLDC motor and drive power loss calculation for dynamic application
BEMF reduces internal voltage thus torque reduces to 0 at full speed.
Also... &quot; the torque constant weakens as a result of temperature increase as does the Back-EMF constant! So the motor’s coil resistance, the torque constant, and Back-EMF constant are all negatively impacted for the very simple reason that they are functions of temperature.&quot;

Advantage : much greater MTBF, Efficiency , less brush-arc noise (none)


Other
I highly recommend you find this tool 
Unfortunately, I cannot remember where I got it. Try ST electronics.
It supports direct, WiFI and CAN. So you define the variables and get the code to measure performance from the test board.
It supports BLDC, DC and FOC motors.
Here's another experiment I did,  get a 100W 1 phase AC to 3ph BLDC fan  (I only paid 1/2 price of $160 cdn)  and study the design. Extremely powerful, cool and quiet.  But unsafe to scope with no ground in the electronics.

(direct ACDC conversion to -150V from 120Vac and then 3 phase BLDC drivers with STM32 uC controller.  My task was to reverse the rotation direction and remote control it.

short video https://we.tl/t-VjnCnnrQqM