Magnetic Analysis of Skew Effect in Surface-Mounted Permanent Magnet Machines With Skewed Slots

Zhuang, Haijun; Zuo, Shuguang; Ma, Zhixun; Yu, Qiang; Wu, Zhipeng; Liu, Chang

doi:10.1109/tmag.2022.3208696

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…According to (34) and (35), the force densities are merely determined by flux densities in magnetostatic analysis. Fig.…”

Section: Radial and Tangential Force Densitymentioning

confidence: 99%

Full-Domain Harmonic Potential Balance Model for 2-D Magnetic Field Analysis of Electrical Machine

Su,

Huang,

et al. 2024

Preprint

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“…According to (34) and (35), the force densities are merely determined by flux densities in magnetostatic analysis. Fig.…”

Section: Radial and Tangential Force Densitymentioning

confidence: 99%

Full-Domain Harmonic Potential Balance Model for 2-D Magnetic Field Analysis of Electrical Machine

Su,

Huang,

et al. 2024

Preprint

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“…Using the subdomain technique, the slotting and tooth‐tip effects are also taken into account [28]. Skewed slots effects on air gap flux density distribution of a surface‐mounted PM machine are also investigated using 3D analytical model‐based Maxwell ' s equations [29].…”

Section: Introductionmentioning

confidence: 99%

Incorporating the coupled effects of slot opening, armature reaction and saturation in the model of the airgap flux density distribution of permanent magnet synchronous machines

Babaei,

Feyzi,

Nazari Marashi

2023

IET Electric Power Appl

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A new analytic model for calculating of the air‐gap flux density (AGFD) of surface‐mounted permanent magnet synchronous machines (SMPMSMs) is presented. This proposed model is capable to taking into account the effects of magnetic saturation, armature reaction and stator slots opening. Furthermore, the real form of air‐gap distribution and spatial distribution of flux density of the PM poles are considered. The armature reaction effect is modeled using phasor diagram analysis of the motor as a function of the load torque, the armature current amplitude, power factor and the inverse air gap length. Also, saturation phenomenon predicted using the new non‐linear proposed function in connection with the armature reaction effects and the properties of the lamination material. It is shown that the proposed model capable to predicting acceptably the air gap flux density waveform of the SMPMSMs at lagging and leading power factors and with the load torque variation. The presented analytical approach is verified by the two‐dimensional finite‐element analysis (FEA) results.

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“…To reduce the cogging torque, several methods have been proposed to eliminate the inherent harmonic components of cogging torque, including the optimization pole-arc coefficient [3], skewing [4], unequal/asymmetrical magnet widths [5], harmonic currents injection [6], and so on. However, due to the unavoidable uncertainties in the process of manufacturing and assembling, rotor eccentricity and manufacturing tolerances are frequently present, and the additional harmonic components (AHCs) of cogging torque might be introduced in practical motors [7]- [9].…”

mentioning

confidence: 99%

Analysis of Cogging Torque of Permanent Magnet Motors Under Mixed-Eccentricity and Manufacturing Tolerances

Zhao,

Zhang,

Zhang

et al. 2024

IEEE Access

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The rotor eccentricity and manufacturing tolerances caused by unavoidable uncertainties in the process of manufacturing deteriorate the cogging torque of permanent magnet (PM) motors. This paper proposes an analytical model to reveal the effects of mixed-eccentricity (ME) and manufacturing tolerances on the harmonic components of cogging torque. A coefficient is introduced to intuitively characterize the impact of ME on the distribution of the air-gap length. Then a modified analytical model is developed to theoretically identify the additional harmonic components (AHCs) of cogging torque associated with the eccentricity and tolerances. And the main AHCs of cogging torque are quantitatively determined through the finite element method. Finally, suggestions to improve the robustness considering uncertainties by selecting pole/slot combination and pole-arc ratio are proposed.INDEX TERMS Permanent magnet motors, mixed-eccentricity (ME), manufacturing tolerances, additional harmonic components (AHCs) of cogging torque, robust design.

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Magnetic Analysis of Skew Effect in Surface-Mounted Permanent Magnet Machines With Skewed Slots

Cited by 4 publications

References 21 publications

Full-Domain Harmonic Potential Balance Model for 2-D Magnetic Field Analysis of Electrical Machine

Full-Domain Harmonic Potential Balance Model for 2-D Magnetic Field Analysis of Electrical Machine

Incorporating the coupled effects of slot opening, armature reaction and saturation in the model of the airgap flux density distribution of permanent magnet synchronous machines

Analysis of Cogging Torque of Permanent Magnet Motors Under Mixed-Eccentricity and Manufacturing Tolerances

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