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In this paper, for the high efficiency and vibration reduction of IPMSM(Interior Permanent Magnet Synchronous Motor), Design of the rotor and stator shapes was carried out. The validity of the study was verified through the efficiency and the vibration characteristics comparison with the experiment ones.
In this paper, we present a comparative analysis of surface-mounted permanent magnet synchronous motors (SPMSM) and interior permanent magnet synchronous motors (IPMSM) for compressors of air-conditioning systems in electric vehicles (EVs). First, we use 2D finite element analysis (FEA) to analyze models satisfying the same rated conditions according to the torque-speed curve characteristics, which...
A major source for torque ripple is the harmonics in airgap permeance caused by stator slotting, permanent magnet (PM) flux barrier, etc. They are reflected in the flux linkages of the stator windings. In this work, we express the d and q-axis flux linkages as Fourier series after obtaining them using finite element analysis (FEA). Torque ripples are obtained analytically using the Fourier coefficients...
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...
This paper describes torque characteristics of the interior permanent magnet synchronous motor (IPMSM) using the inexpensive ferrite magnets. IPMSM model used in this study has the spoke and the axial type magnets in the rotor, and torque characteristics are analyzed by the three-dimensional finite element method (3D-FEM). As a result, torque characteristics can be improved by using both the spoke...
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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