1 Power Electronic Systems, The Faculty of Engineering and Science, Aalborg University, VBN2 Department of Energy Technology, The Faculty of Engineering and Science, Aalborg University, VBN3 The Faculty of Engineering and Science (ENG), Aalborg University, VBN4 University Politechnica Timsoara
The paper describes a direct torque controlled (DTC) permanent magnet synchronous motor (PMSM) drive that employs feedback linearization and uses sliding-mode and linear controllers. We introduce a new feedback linearization approach that yields a decoupled linear PMSM model with two state variables, the torque and the square of stator flux magnitude. This linear model is intuitive and allows the implementation of DTC-type controllers that preserve all DTC advantages and eliminate its main drawback, the flux and torque ripple. Next, we investigate two controllers for toque and flux. A variable structure controller (VSC) which is robust, fast, and produces low-ripple control is compared with a linear-DTC scheme which is ripple free. The torque time response is similar to a conventional DTC drive and the proposed solutions are flexible and highly tunable. We present the controller design and analyze the robust stability. Experimental results for a sensorless PMSM drive validate the proposed solution.
Proceedings of the International Conference on Optimization of Electrical and Electronic Equipments, Optim, 2012, p. 338-343
Main Research Area:
Optimization of Electrical and Electronic Equipment (optim), Proceedings
13th International Conference on Optimization of Electrical and Electronic Equipment, 2012