The performance research of induction motor systems controlled by the IDA-PBC method and its speed sensorless implementation

Three methods for the induction motor (IM) applying the interconnection and damping assignment passivity based control (IDA-PBC) have been summarized and compared with each other. After comparison, the IM system controlled by the third IDA-PBC method containing a load torque observer based on adaptation mechanism presents a better performance in accurately tracking the variable rotor speed and being robust to the load torque disturbance. Then, the third method is combined with a sensorless control utilizing the difference between the real and the estimated stator currents to estimate the rotor speed, besides, a novel method of rotor resistance adaptive identification based on rotor flux orientation is included to improve the EVI system performance. At last, the system simulation is implemented and research results validate the EVI system controlled by the third IDA-PBC method including the rotor speed estimator and rotor resistance identification provides high dynamic performance with respect to the rotor resistance variation and load torque disturbance.