Fault Performance Analysis Of Dual Three-phase Permanent Magnet Synchronous Motor

With the rapid development of industrialization, Conventional motor has been unable to meet the modernization process in a certain extent, especially in areas such as aerospace which increasingly high demand for the motor, permanent magnet motors become the main target of the present study, in the beginning, many research is about the three-phase permanent magnet synchronous motor. In recent years scholars and experts begin to work on fault-tolerant motor, when it meet a failure it can also run under a certain conditions, the most representative in fault-tolerant motor are multiphase motors. Because the number of multi-phase motor is more, when it is in the event of failure, we can achieve the purpose of fault tolerance through adjusting relative to the non-fault compensation or taking a certain way. The most research are four-phase, five-phase, six-phase motors, six of the most promising phase motors, the outlook of six-phase motors is very big. The more research is Dual three-phase phase shift 30 ° magnet synchronous motor. However, this motor has a high electromagnetic torque and torque ripple is relatively small, coupling high, In the state of failure, two sets of windings in the stator slots, the fault phase will impact on the non-fault phase, In view of this situation, Dual three-phase phase shift 180 ° permanent magnet synchronous motor is proposed, it has small mutual inductance between the windings, which is conducive to decouple the motor control.Firstly, analysis and comparison of two-phase permanent magnet synchronous motor and a traditional three-phase motor in the structure and the forms of windings. It focuses on the structure similarities and differences between the two twin three-phase motor.Secondly, using Ansoft Maxwell2 D to establish the model, analysis the flux density, cogging torque, in the no-load operating conditions. Analysis normal operation current, torque waveform, and analysis the advantages and disadvantages of the two motors.Finally, analyzing fault tolerance in the stator MMF principle, simulation motor in normal running and occurrence of one phase, two-phase winding phase failure fault, the case of a phase winding short-circuited. Analog motor normal and fault operation, Analyzing the changes in motor torque and current, get the different conclusion, fault tolerant measures should be taken when is in the open phase fault。Prospecting the potential applications of the permanent magnet motor, prospecting of research in fault tolerance.