DRV10970: motor speed & torque

Part Number:DRV10970

Hi：

      I want to ask about the DRV10970， now ，I drive the motor at 30 rotations per second, but the torque is very small, and it stops with slight load. Sometimes the 5s can be restored, and sometimes it stops completely. I need to increase the power by myself，How do you solve this problem？