Robust Control Based on Variable Structure of a Symmetrical Six Phase PMSM For Wind Turbine
Résumé
In this paper, we propose one of the most advanced controllers in order to increase the reliability and efficiency of the multiphase generators. A variable structure control (VSC) based on the sliding mode theory is designed to control the inner current loops of a symmetrical Six-Phase Axial Flux Permanent Magnet Synchronous Generator (6P-AF-PMSG). This technique presents a good performance between static accuracy and speed of the response. However, the proposed controller law is not only insensitive to the plant parameters, but it is also robust under external disturbances. The stability of the system will be demonstrated via Lyapunov analysis. Experimental tests illustrate the robustness of this law control strategy in healthy and faulty conditions with one to three missing phases.