Synchronous Reluctance Motor with Dual Three-Phase Winding for Fault- Tolerant Applications

This paper deals with dual three-phase winding synchronous reluctance motor designed for increasing the drive fault-tolerance. The two three-phase windings are supplied by separate inverters. In the event of fault of either a winding phase or an inverter, the faulty three-phase winding is disconnected and the motor is operated feeding the healthy winding only. Various winding configurations are considered and compared, in terms of average torque, radial force and mutual coupling between the two windings, during the faulty operations. Considerations are given regarding the winding arrangements so as to avoid excessive torque ripple and unbalanced radial force in this operating conditions.