Fault tolerant control design of induction motor drive in electrical vehicle: A hybrid control approach

In this paper, we propose to design a Fault Tolerant Controller (FTC) that can cope both with performance and robustness by the hybridization of two controllers. The distinguished feature of this architecture is that it shows structurally how the controller design for performance and robustness can be done separately. It has the potential to overcome the conflict between performance and robustness of the traditional feedback framework. The controller design works in such a way that the feedback speed control of the induction motor will be solely controlled by the proportional integral PI controller for a nominal model without disturbances and H_∞ robust controller will only be activated in the presence of the faults, the uncertainties or external disturbances. This FTC is applied to an induction motor drive for electrical vehicle. The simulation results demonstrate the effectiveness of the proposed hybrid fault tolerant control architecture.