Analysis and Minimization of Detent End Force in Linear Permanent Magnet Synchronous Machines

Hu, Henglong; Liu, Xiangdong; Zhao, Jing; Guo, Youguang

doi:10.1109/tie.2017.2740851

Cited by 81 publications

(19 citation statements)

References 21 publications

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“…However, most methods are only optimized for only one or two parameters. Reference [10] only the end forces in LPMSGs are optimized. Reference [11] is mainly concerned with thrust density.…”

Section: Introductionmentioning

confidence: 99%

Multi-Physical Coupling Field of a Permanent Magnet Linear Synchronous Generator for Wave Energy Conversion

et al. 2021

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Permanent Magnet Linear Synchronous Generators (PMLSG) has high power density and high efficiency, which is always employed in industrial application field. However, as temperature increases, it is easy to cause demagnetization of the permanent magnet, and the applications of PMLSG is limited. In this paper, a PMLSG is optimized which is used in a low speed power generation system. Firstly, a multi-physical coupling field system is described, and introduced the main factors which affecting the design of the PMLSM. Secondly, a multi-physics optimization method based on Genetic Algorithm (GA) is to improve the power density and efficiency. At the same time reduce the material cost of the generator. The thermal model is established and analysis the losses of PMLSG. The conductive heat transfer coefficient is calculated. Then, a Finite Element Analysis (FEA) model is established, and the electromagnetic properties of PMLSG were analyzed. The results of the electromagnetic field calculation are imported into the transient thermal analysis model by FEA, and the temperature of each part for PMLSG are calculated. Finally, an experimental test platform is built for verifying the correctness of the analysis.

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Section: Introductionmentioning

confidence: 99%

Multi-Physical Coupling Field of a Permanent Magnet Linear Synchronous Generator for Wave Energy Conversion

et al. 2021

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“…The main analytical models and modeling methodologies currently available for establishing the magnetic field distribution in LPSTs include the equivalent magnetic circuit model [6], equivalent magnetic network model [7,8], layered model method [9,10], conformal transformation model [11], and exact subdomain method (ESM) [8,[12][13][14][15][16][17]. The equivalent magnetic circuit model is simple and intuitive, but the calculation error is large.…”

Section: Introductionmentioning

confidence: 99%

Analytical Calculation of Open‐Circuit Magnetic Field in Linear Phase‐Shifting Transformer Based on Exact Subdomain Model

Guo

Zhao

Xiong

et al. 2021

IEEJ Transactions Elec Engng

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Linear phase-shifting transformers (LPSTs) are a new type of transformer that can be used in multi-rectifier and multi-inverter systems. However, calculating a precise magnetic field distribution in LPSTs, which is the key premise for obtaining accurate transformer parameters and performance evaluations, remains a challenging task. The present work addresses this issue applying the exact subdomain method (ESM) to establish an analytical model of the magnetic field distribution in an LPST with an arbitrary number of slots in two-dimensional Cartesian coordinates using the magnetic vector potential as the solution variable. The Poisson equations are established in the slot subdomain of the primary side, and the Laplace equations are established in the slot subdomain of the secondary side and in the air gap subdomain. The harmonic coefficients are obtained using the Fourier series method in conjunction with the boundary conditions, and the distribution of the open-circuit magnetic flux density is then solved in each subdomain. The model effectively accounts for the cogging effect on the magnetic field distribution. The inductance of the primary side and the induced potential of the secondary side are obtained using the magnetic flux linkage method. The accuracy of the proposed analytical model is verified by comparison of the results obtained with those obtained by the finite element method (FEM).

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“…Presently, various methods are being used to reduce detent force. PM pole pitch [15], [16] and skewed PM [17] technologies are used to reduce cogging force. However, such methods increase the processing difficulties and manufacturing costs of motors.…”

Section: Introductionmentioning

confidence: 99%

Detent Force Reduction in Permanent Magnet Linear Synchronous Motor Base on Magnetic Field Similarity Method

et al. 2019

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Permanent-magnet linear synchronous motors (PMLSMs) have been widely used in various industries. However, the inherent detent force of these motors limits their application range, especially in high-precision motion and low-speed systems. In this study, magnetic field similarity (MFS) method and edgy teeth-shape optimization are proposed to reduce the detent force. First, an equivalent model of the PMLSM is established wherein the end effect is initially taken into consideration, and the parameters, such as reluctance, energy, and detent force, are calculated. Second, the principle of the MFS is introduced, and the main parameters that affect the detent force are obtained. The detent force is studied and analyzed using parametric analysis, and the shape of the edgy teeth is optimized by particle swarm optimization. The simulation verifies the correctness and applicability of the proposed method. Finally, a prototype is fabricated and the experimental results verify the validity of the mathematical model and simulation results.INDEX TERMS Magnetic field similarity, equivalent magnetic circuit, finite element analysis, tubular permanent magnet linear generator, particle swarm optimization.

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Analysis and Minimization of Detent End Force in Linear Permanent Magnet Synchronous Machines

Cited by 81 publications

References 21 publications

Multi-Physical Coupling Field of a Permanent Magnet Linear Synchronous Generator for Wave Energy Conversion

Multi-Physical Coupling Field of a Permanent Magnet Linear Synchronous Generator for Wave Energy Conversion

Analytical Calculation of Open‐Circuit Magnetic Field in Linear Phase‐Shifting Transformer Based on Exact Subdomain Model

Detent Force Reduction in Permanent Magnet Linear Synchronous Motor Base on Magnetic Field Similarity Method

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