Tuning of Induction Motor Drive with Torque Sensor

To achieve precise torque control of an induction motor drive, the control parameters are tuned with torque sensor before shipping the drive system. In this paper, a method to estimate the rotor resistance and the magnetizing inductance with measured test data which consist of torque, current amplitude and slip frequency is proposed. Then a torque control with look up tables (LUTs) which are built from test data is also proposed. The LUTs decide the current amplitude and the voltage amplitude based on the operating point which is defined as the condition of the motor speed and the torque command.