Online Efficiency Prediction of Induction Motor using Model Reference Adaptvie Method

The power consumption of induction motor and its system is the main force of industrial power consumption, which has great energy-saving potential, and it is of great significance for energy saving and emission reduction. In order carry out scientific and reasonable energy-saving transformation of the motor system, the operation efficiency of the motor system must be estimated in real time and online. In view of the limitations of the previous motor efficiency detection, this paper proposes a non-intervention motor efficiency detection method. This method calculates the speed and torque of the motor on-line based on the improved rotor flux model reference adaptive method (MRAS) and stator flux method, and then obtains the output power of the motor. The simulation and experiment results show that the proposed method can effectively estimate the motor efficiency, and the estimated efficiency has a good follow-up to the actual efficiency of the motor under sudden load.