Suppressing the Thrust Ripple of the Permanent Magnet Linear Synchronous Motors With Different Pole Structures by Setting the Modular Primary Structures Differently

Huang, Xuzhen; Qian, Zhiyu; Tan, Qiang; Li, Jing; Zhang, Bo

doi:10.1109/tec.2018.2842077

Cited by 34 publications

(16 citation statements)

References 22 publications

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“…Due to outstanding electromagnetic properties, the double‐sided permanent magnet linear motor (DS‐PMLSM) is the priority selection for high‐precision and long‐stroke industrial applications [1–3]. However, the tolerance of motor assembly and guide rail stitching results in the primary or secondary component's deviation between the actual operation position and the original design position [4].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Characteristics Analysis in Double‐Sided Permanent Magnet Linear Synchronous Motor with Asymmetrical Air‐Gap

Liu

Zhang

et al. 2022

IEEJ Transactions Elec Engng

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The double‐sided permanent magnet linear synchronous motor (DS‐PMLSM) is widely used in the industrial field with high precision and long strokes due to simple construction, high instantaneous thrust and high controllability. However, parasitic issues, such as unavoidable manufacturing tolerances, might cause the symmetrical position deviation of primary or secondary components, which results in an asymmetrical air‐gap between components, affecting the motor's electromagnetic characteristics further. In this paper, it is taken into account secondary torsional or offset conditions (the secondary component is displaced sideways from a symmetrical position), and investigates the variations of electromagnetic characteristics on the 12‐solt 14‐pole short‐primary DS‐PMLSM. Based on the finite element method (FEM), the effects of secondary torsion or offset on the air‐gap flux density, the back‐EMF, the detent force, the thrust force, and the normal force are investigated and compared respectively. In addition, the analytical results of the back‐EMF considering lower secondary torsion are verified on a lower secondary torsional prototype. From the analytical results of electromagnetic characteristics, it is revealed that with the torsional angle or offset distance rising, the normal force and detent force in the Y‐axis gradually increase, while the thrust force and the back‐EMF decrease. These theoretical researches can play an important role in the operation and assembly process of the DS‐PMLSM. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic Characteristics Analysis in Double‐Sided Permanent Magnet Linear Synchronous Motor with Asymmetrical Air‐Gap

Liu

Zhang

et al. 2022

IEEJ Transactions Elec Engng

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“…The end effect can be reduced by installing auxiliary teeth at both ends of the mover [11][12][13]. Ripple components are reduced by adopting a modular mover [14,15]. A method was proposed in which the detent force was reduced by the modularization of the mover through response surface methodology (RSM), considering multiple responses.…”

Section: Introductionmentioning

confidence: 99%

Shape Optimization of Discontinuous Armature Arrangement PMLSM for Reduction of Thrust Ripple

2021

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The aim of this paper is to present the optimal design process and an optimized model for a discontinuous armature arrangement permanent magnet linear synchronous motor (PMLSM). The stator tooth shapes are optimized to reduce detent force. When the shape of the stator is changed to reduce the detent force, the saturation magnetic flux density and the back electromotive force characteristics change. Multi-objective optimization is used to search for the local lowest point that can improve the detent force, saturation magnetic flux density, and back EMF characteristics. To reduce the detent force generated at the outlet edge, a trapezoidal auxiliary tooth was installed and the performance was analyzed. The experiment’s response surface methodology is used as an optimization method and all the experimental samples are obtained from finite-element analysis. The validity of this method is verified by comparing the optimized FEA model to the initial FEA model.

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“…In view of the above problems, the method of designing the sectional motor has been researched and applied in consequentpole linear motors [20,21], flux switching linear motors [22,23], tubular linear motors [24,25] and doubly salient linear motors [26]. Huang et al [20] studied the single-sided modular consequent-pole PMLSM.…”

Section: Introductionmentioning

confidence: 99%

Design principle of a 16‐pole 18‐slot two‐sectional modular permanent magnet linear synchronous motor with optimisation of its end tooth

Huang

Zhang

et al. 2020

IET Electric Power Applications

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In order to improve the performance of the linear motor system, it is necessary to adopt a simple motor structure and effective optimisation method to reduce the detent force without decreasing the average thrust. A 16-pole 18-slot two-sectional modular permanent magnet linear synchronous motor (PMLSM) is investigated in this study, in which the primary core is divided into two modules and coupled with the secondary, forming two sections. It is found that the modular distance between the two sections affects the detent force and back-electromotive force of the whole motor. Thus, the characteristics of the detent force and the categories of the winding arrangements are analysed. The modular distance of 4τ/9 is chosen after analysis and comparison. To further suppress the detent force and improve the average thrust, a new end tooth structure including different wide and narrow tooth is proposed, which is set at the ends of each section's primary core. The design method of the end tooth parameters is obtained by theoretical derivation and the optimisation efficiency of end tooth parameters is further improved by layered optimisation design. Finally, the experiments on the 16-pole 18-slot PMLSM validate the correctness and feasibility of the proposed modular motor structure.

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Suppressing the Thrust Ripple of the Permanent Magnet Linear Synchronous Motors With Different Pole Structures by Setting the Modular Primary Structures Differently

Cited by 34 publications

References 22 publications

Electromagnetic Characteristics Analysis in Double‐Sided Permanent Magnet Linear Synchronous Motor with Asymmetrical Air‐Gap

Electromagnetic Characteristics Analysis in Double‐Sided Permanent Magnet Linear Synchronous Motor with Asymmetrical Air‐Gap

Shape Optimization of Discontinuous Armature Arrangement PMLSM for Reduction of Thrust Ripple

Design principle of a 16‐pole 18‐slot two‐sectional modular permanent magnet linear synchronous motor with optimisation of its end tooth

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