Pulsating Magnetic Field of Permanent Magnet Linear Synchronous Motor and Its Influence on Detent Force

Tan, Qiang; Wang, Mingyi; Li, Junchi

doi:10.1109/tec.2020.3020794

Cited by 12 publications

(5 citation statements)

References 21 publications

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“…8. The master–slave boundary model can equate a linear motor to an infinite radius rotating motor and therefore has no end effect [21].…”

Section: Detent Force Analysis Of Pmlsmmentioning

confidence: 99%

Analysis of Detent Force in Flat‐Type Permanent Magnet Linear Synchronous Motor and Multi‐Objective Optimization Based on Parameter Classification

Zhang

2022

IEEJ Transactions Elec Engng

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In order to reduce the thrust ripple caused by the detent force and improve the thrust capacity of the permanent magnet linear synchronous motor (PMLSM), a flat‐type PMLSM is taken as the study object to globally optimize the motor parameters. Firstly, an analytical model for PMLSM is established. The end effect force based on the virtual displacement principle and the cogging force using the equivalent air gap length are considered when analyzing the model. The detent force is found that closely related to the relative position of the primary and secondary, the end air gap volume and the equivalent air gap length. Then, a motor structure optimization method based on parameter classification is proposed in this paper. By sensitivity analysis, the parameters are divided into two types. For parameters with high sensitivity, the response surface methodology (RSM) is used to establish the second‐order regression equation between parameters and response, and then these parameters are optimized by the multi‐population genetic algorithm (MPGA) to improve thrust capacity and reduce thrust ripple. The optimal values of parameters with low sensitivity are obtained by the parametric search. Finally, the optimized motor is used to predict its thrust performance by the finite element method (FEM). The prediction results show that the optimized motor not only performs better but also improves the design efficiency through parameter classification. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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“…8. The master–slave boundary model can equate a linear motor to an infinite radius rotating motor and therefore has no end effect [21].…”

Section: Detent Force Analysis Of Pmlsmmentioning

confidence: 99%

Analysis of Detent Force in Flat‐Type Permanent Magnet Linear Synchronous Motor and Multi‐Objective Optimization Based on Parameter Classification

Zhang

2022

IEEJ Transactions Elec Engng

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“…According to the kinetic evaluation approach of traditional inside combustion engines [27], the force analysis of the kinetic subassembly of the PMPMEE conducted by simplifying the structure of the cylinder, crankshaft, and connecting rod, as well as the force evaluation graph under the work stroke, are shown in Figure 2. Since the PMPMEE does not modify the structural dimensions of the conventional internal combustion engine, such as the connecting rod length, crank radius, and piston stroke, the piston displacement, piston velocity, and piston acceleration are the same.…”

Section: System Dynamics Modelmentioning

confidence: 99%

Design Optimization of Electrodynamic Structure of Permanent Magnet Piston Mechanical Electric Engine

2021

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To meet the demand of multiple power requirements, and enhance power utilization, a new type of dual-element electricity unit is designed in this study, which is a permanent magnet piston mechanical electric engine. Based on the analysis method of traditional internal combustion engines and linear generators, the working principle of the engine and the magnetic field distribution in the electrodynamic structure are analyzed, the machine dynamics model and electrodynamics model of the engine are established, then the theoretical evaluation is additionally established using finite elements. Based on this, an optimization model is constructed with the electrodynamic shape dimension as the optimization variable, with the intention of growing the output power. The optimization of the engine electrodynamic shape is executed via the use of the finite aspect approach and the NLPQL optimization algorithm integrated. The results show that the optimized engine output electricity expanded to 8.40 w, which is 18.81% greater than before optimization. An experimental prototype is developed, and the output voltage of the prototype is measured to verify the precept and overall performance of the new structure.

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“…The FEM models shown in Figure 4 are established to obtain the air-gap flux density of the CP-PMLSM I. Besides, the end effect generates a pulsating magnetic field, which results in the end force and can be calculated by the different boundary condition models [21]. The FEM models of the NS-PMLSM I are established based on the same principle.…”

Section: Characteristics Of Pulsating Magnetic Fieldsmentioning

confidence: 99%

Research on Segmented Primary Consequent-Pole Permanent Magnet Linear Synchronous Motor with Symmetric and Periodic End Force

Huang

Zhang

et al. 2021

Symmetry

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The end force of North-South permanent magnet linear synchronous motor (NS-PMLSM) fluctuates symmetrically with a period of one pole. Different from it, the end force’s fluctuation cycle of the consequent-pole permanent magnet linear synchronous motor (CP-PMLSM) is usually two poles and asymmetrical. Especially, within two half cycles, the end force presents complex asymmetric characteristics. In this paper, a piecewise function model of the end force of CP-PMLSM is established. Then a primary segmented design method for adjusting the period, symmetry and phase of the end force waveform is proposed. The two-segment and grouped four-segment modular distances are combined and matched to eliminate the odd-numbered harmonics of the end force and suppress the thrust ripple. A slotless primary core experimental platform and a slotted CP-PMLSM prototype are manufactured and tested to verify the theoretical analysis and simulation results.

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Pulsating Magnetic Field of Permanent Magnet Linear Synchronous Motor and Its Influence on Detent Force

Cited by 12 publications

References 21 publications

Analysis of Detent Force in Flat‐Type Permanent Magnet Linear Synchronous Motor and Multi‐Objective Optimization Based on Parameter Classification

Analysis of Detent Force in Flat‐Type Permanent Magnet Linear Synchronous Motor and Multi‐Objective Optimization Based on Parameter Classification

Design Optimization of Electrodynamic Structure of Permanent Magnet Piston Mechanical Electric Engine

Research on Segmented Primary Consequent-Pole Permanent Magnet Linear Synchronous Motor with Symmetric and Periodic End Force

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