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How to Control Torque of Brushless Motor

Evaluation board:  drv8301-hc-evm revd

Lab 10a Overmodulation

Current problems: When I clamp the motor shaft with a load of 60N. cm, I start the motor at this time, and the output of the motor's torque increases to 50N. cm around 10ms.

This is not the result we want, we hope that the motor torque output should be a slow rising process, 350ms is very suitable, which code should be modified to achieve the above functions?

Below is another country's product that has achieved a slow output of torque. Our test found that even if we jam the motor shaft with a very large load(60N.cm),

Still, it can be felt that the torque of the motor increases slowly at the moment of starting.

Which code should I modify to achieve the torque output shown in the figure below?The rise time is 350 ms, not 10 ms.