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This paper presents the analysis, characterization and comparison of the cogging torque components generated by five different IPMSM rotor structures. More in detail, an IPMSM model (named IPMSM1), which is derived from a commercial geometry, is analyzed by using a Finite Element Method (FEM) approach. Then, four other IPMSM models, which are obtained by modifying the IPMSM1 rotor structure and by...
The paper proposes a design strategy to reduce torque ripple in interior permanent magnet synchronous motor (IPMSM) with concentrated winding. Authors propose there ideas of design strategy. The first is to choose the combination of poles number and slots number which minimizes the torque ripple. The second is the decision of pole arc angle by trapezoidal waveform approximation of the air-gap magnetic...
In recent years, interior permanent magnet synchronous motor (IPMSM) with concentrated windings has been interested as a smaller and higher-efficient motor than that with distributed windings. In this paper we have been analyzed the load characteristics of the eighteen IPMSM models with the various pole-slot combinations and the pole-arc angles using finite element method. The analyzed characteristics...
Generally, cogging torque derives from motor using permanent magnet such as interior permanent magnet synchronous motor (IPMSM) and surface permanent magnet synchronous motor (SPMSM). The cogging torque works for smoothness in rotation of the rotor, but it is a kind of root cause mechanical vibration and acoustic noise. Consequently, cogging torque must be reduced by all manner of means. There are...
This paper presents flexible flux-barrier designs in an interior permanent magnet synchronous motor (IPMSM) for driving compressor in hybrid electrical vehicle. A conventional single-layer IPMSM model, a popular double-layer IPMSM model and a proposed novel double-barrier IPMSM model are built and optimized for improving torque performance by reducing cogging torque and torque ripple. The novel double-barrier...
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