Effect of Rotor Parameters on Leakage Coefficient of Spoke-Type PMSM

Spoke-type permanent magnet synchronous machine provides good torque performance due to its magnetic congregate effect, but the magnetic flux leakage phenomenon is more serious than other interior permanent magnet synchronous machine (IPMSM). In this paper, the influence of changing the rotor structure on leakage coefficient of spoke-type PMSM is studied by establishing a finite element model. Moreover, magnetic flux density, back-EMF, torque and efficiency performance of spoke-type PMSM under no load and on load are also analyzed. The results show that increasing the aspect ratios of the permanent magnet, increasing the length of the flux barrier bridge, reducing its width, and improving the shape of rotor can effectively reduce the magnetic flux leakage, improve the torque and efficiency of spoke-type PMSM, and it provide a practical application of spoke-type PMSM.