The Permanent Magnet Synchronous Motor (PMSM) is commonly used as traction motors in the electric traction applications such as in subway train. The subway train is better transport vehicle due to its advantages of security, economic, health and friendly with nature. Braking is defined as removal of the kinetic energy stored in moving parts of machine. The plugging braking is the best braking offered and has the shortest time to stop. The subway train is a heavy machine and has a very high moment of inertia requiring a high braking torque to stop. The plugging braking is an effective method to provide a fast stop to the train. In this paper plugging braking system of the PMSM used in the subway train in normal and fault-tolerant operation is made. The model of the PMSM, three-phase Voltage Source Inverter (VSI) controlled using Space Vector Pulse Width Modulation technique (SVPWM), Field Oriented Control method (FOC) for independent control of two identical PMSMs and fault-tolerant operation is presented. Simulink model of the plugging braking system of PMSM in normal and fault tolerant operation is proposed using Matlab/Simulink software. Simulation results for different cases are given.
This paper presents an implementation of anindependent control of two-mechanically coupled PermanentMagnet Synchronous Motor (PMSM) fed by two Space VectorPulse Width Modulation (SVPWM) inverters in a separate modeand in the event of failure one leg of one inverter, fault tolerantmode. In a fault tolerant mode, the two motors can operate in anindependent control strategy from one inverter with five legs tomaintain a constant output coupled torque. The Field OrientedControl (FOC) strategy is used to control the stator current of thetwo motors through two separate paths. Such application is usedin the field of a coupled torque produced by multi-motors such asin subway applications. The whole system is simulated in Matlab/Simulink and the simulated results show a stable and robustnessa system which can maintain a constant developed torque with avelocity reaches to the rated under fault tolerant operation.
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