Control of electric hoist motor based on variable load
Electronic controls can control all of the various aspects of motor performance, but the natural relationship among the various aspects limits the ability to control them. The control system must also be limited by the physical capabilities of the motor. In addition, the characteristics of the load impose limits on the performance of the motor. In choosing to control torque, you must remember that you can no longer control speed except to set maximum and minimum speed limits. When these limits are reached, torque control is no longer in effect. You can also have a torque control loop inside a speed control loop. The choice of control strategy is made with consideration of the nature of the driven machine.

You need to think about speed, torque, power and acceleration rate. Determine how these are related to the characteristics of the motor and load. Define what overall performance benefit will be gained by controlling torque. Determine if torque should be the primary adjustment that should be set by the operator.

The electronic control can be configured to do anything you want it to do. What needs to be done is to determine how the driven equipment can best be used by the operator. Then determine how to implement a control system to make that happen.