Robust Observer Design with Pole Placement Constraints for Induction Motor Control
Keywords:Full-order observer, LMI, induction machine, robust control, sensorless control, vector control.
This paper presents an observation and control design methodology for a three-phase induction machine using a robust control technique. The state estimation and parameter identification of electrical motor are the main problem of the high-performance industrial application of electric drives. We propose a robust solution for real-time estimation of the rotor flux as well as the rotor speed. Indeed, to achieve a robust performance for the rotor flux observer, a H∞ synthesis technique with pole placement will be used. The observer gain matrix is calculated by solving a convex optimization problem. The proposed solution has been tested and validated by an experimental set-up on a 3 KW squirrel age induction motor.
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