for a DC motor, when the torque or load is small, the DC motor rotation speed is fast. When load becomes bigger, the speed slows down. But what if the load exceeded the stall torque, and maybe cause the motor to rotate in reverse? In this case, what will the motor current be and what will happen? In addition, is there any type of motor that can handle overload torque easily or still gives you "stall torque" or "max torque" no matter how much torque you apply?
When the applied torque exceeds the stall torque, then the motor will rotate in reverse, so does the DC motor become a generator? But the applied power is still there, so maybe the newly generated voltage will actually reduce voltage supply and hence reduce the "stall current"? Also, what about the combined torque when "stall torque" was exceeded?