A Method for the Estimation of the Constant Load Torque by Using the Steady-State Electrical Torque Signal

In this paper, the constant load torque of a three-phase induction motor is estimated by means of the steady-state electrical torque signal and the motor torque due to the friction loss. In this case study, the load is connected to the motor's output shaft through an electromagnetic brake generating constant load at three magnitudes. Validation of load torque estimation is performed by identifying electrical and mechanical parameters and simulating its mathematical model to compare estimated and simulated constant load signals. Then this methodology can be used to estimate constant load torques on induction motors.