DC motor torque-speed chart in braking quadrant

[mawad]

Hello,
I would like to know what will be the shape of the torque-speed diagram in braking quadrant.
Many thanks

[berkeman]

Hello,
I would like to know what will be the shape of the torque-speed diagram in braking quadrant.
Many thanks

What is the context of the question? What reading and research have you done so far on this question?

[mawad]

All I found is the torque-speed diagram in motoring quadrant. Which follows the following equation : Torque=C1-C2*speed. I am asking what about braking quadrant?