AC Motor torque simulation
There are a few things you have wrong.  First, 1789 Nm is the rated ("full load") torque, not the maximum torque.  The maximum torque is usually called the "breakdown torque" and according to your data, it is 210% of the full load torque.  This puts the maximum torque at 3756.9 Nm.  The locked rotor torque also isn't 42.93 Nm, but rather 190% of the full load torque.  This puts the locked rotor torque at 3399.1 Nm.

Try fixing those things.  Also notice that the graph provided plots the speed, torque, and current as a ratio of the rated values.