Design and Comparison of Interior Permanent Magnet Synchronous Traction Motors for High Speed Railway Applications

As a potential candidate of high speed railway traction motor, interior permanent magnet synchronous motor (IPMSM) gains a lot of attention due to its inherent merits such as high torque density, excellent efficiency and superior controllability. This paper performs a design and comparative study of IPMSMs with five different rotor topologies, V shape, U shape, VV shape, VU shape and UU shape. The magnetic field, inductances, mechanical characteristics and short circuit fault performances of the five motors have been compared in detail. The most impressive find is that the U shape motor have the best fault tolerant ability. In addition, other aspects of the five motor will be carried out and a prototype of U shape motor will be proposed in the final paper.