Abstract:

Recently permanent magnet synchronous motors (PMSMs) have been used in many traction applications. Although they have many advantages about energy saving, power-torque density and efficiency, main disadvantage of these motor type is torque ripples. In general, there are two ways for reducing the torque ripples. These methods are motor core magnetic design method and current control method. In this study, slitted stator core teeth geometry has used for reducing the torque ripple. One of the basic missions of slitted cores is generating the useful reluctance torque and helping the more symmetrical distribution of the flux density on magnetic cores of the motor. In this study, an outer rotor PMSM has been used for required performance comparisons. There have been two numerical models created for the performance analysis of outer rotor PMSM. Primarily, a classical analytical outer rotor PMSM model has been created and dynamical analysis of this model has been operated with Finite Element Analysis simulation programme. Afterwards, another FEA performance analysis for same physical and electrical featured but slitted stator core numerical model of outer rotor PMSM has been achieved. Magnetic flux density distributions, torque ripple values and other performance values of each prototype motor have been given in study. When the obtained performance values evaluated, torque ripple value of slitted core PMSM has been %5 less than traditional outer rotor PMSM, besides it has been shown that, mean torque value of slitted core PMSM is %3 bigger than classical outer rotor PMSM.

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