Fault Tolerant Design for Permanent Magnet Synchronous Motor using Fuzzy Speed Controller

In recent years, permanent magnet synchronous motors (PMSM) are making significant inroads because of robustness, high efficiency and widely used in industrial applications. However, the un-modeled dynamics, the eventual mistakes and the strong nonlinearity diminish the motor performance quality. Indeed, since its synthesis is based on heuristic knowledge, linguistic description to perform a task and does not require a system model, the fuzzy logic control (FLC) idea is successfully applied to motor systems. Despite these advantages, the occurrence of failure may dramatically degrade the system performance and may even result in catastrophic system collapse. Therefore, in order to overcome with the above drawbacks in this study a new fault tolerant control (FTC) structure based FLC is designed to improve PMSM drives currents and speed controls during healthy and faulty conditions. Numerical results are given to highlight and validate the proposed control strategies.