Presentation of a Novel Transverse-Flux Permanent Magnet Linear Motor and Its Magnetic Field Analysis Based on Schwarz–Christoffel Mapping Method

Fu, Dongshan; Xu, Yanliang; Gillon, F.; Gong, Jinlin; Bracikowski, Nicolas

doi:10.1109/tmag.2017.2756847

Cited by 28 publications

(9 citation statements)

References 10 publications

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“…The magnetic field in the coils allows to associate a magnetomotive force with each iron core. The current in winding coils can produce the MMF in the magnetic circuit which is expressed in (4). Similarly, the coils around the iron core are considered to establish the link between the magnetic flux and emf.…”

Section: Electric Couplingmentioning

confidence: 99%

“…Coupled circuit and magnetic model efficiency and precision is very important for the design of electric machine systems [2] [3]. However, TFPMLM normally suffers from the complex structure resulting from the 3-D magnetic circuit, which is usually analyzed using 3-D FEM with time-consuming problem [4]. A coupled circuit and magnetic model of TFPMLM need to deal with two parts: magnetic part and coupled circuit part.…”

Section: Introductionmentioning

confidence: 99%

“…Schwarz-Christoffel (SC) conformal mapping technique is another analytical method that is used to resolve the air gap field distribution and can consider the slotting effects and the end effects. This method has been applied to analyze TFPMLM [4]. However, SC method cannot take nonlinear BH curve into account, and only calculates the magnetic values in the air gap region.…”

Section: Introductionmentioning

confidence: 99%

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Coupled Circuit and Magnetic Model for a Transverse Flux Permanent Magnet Linear Motor

Gong

et al. 2020

IEEE Access

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In this paper, a strong coupling between magnetic and electric phenomena is provided allowing to have an accurate and high-speed coupled model. A coupled circuit and magnetic model for an E-core transverse flux permanent magnet linear motor (TFPMLM) is proposed, which has an advantage linked to reducing time computing more than ten times when compared to 3-D finite-element model (FEM). Firstly, a multi-plane flexible-mesh nonlinear equivalent magnetic network (EMN) model is proposed to improve the computation efficiency as well as the high precision of the magnetic model. And a new method to define the converged iterative process is presented to further decrease the computing time. Secondly, the magnetic circuit and electric circuit are normalized into a solution matrix by introducing controlled sources and discretization methods which forms the coupled model. Then, the magnetic flux in the magnetic circuits and the current in the electric circuits are obtained simultaneously for each time step. The characteristics such as the air-gap flux density distribution, output thrust force waveforms and the phase currents are analyzed by the proposed coupled model. The modeling approach is approved by comparison with the 3-D FEM model. Finally, the proposed model is validated through the experimental setup with the machine prototype. INDEX TERMS Coupled model, electric circuit, equivalent magnetic network (EMN), linear motor, transverse flux.

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Section: Electric Couplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Coupled Circuit and Magnetic Model for a Transverse Flux Permanent Magnet Linear Motor

Gong

et al. 2020

IEEE Access

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“…In Ref. [14], the Schwarz-Christoffel transform has been used to analyze the magnetic field of transverse flux PM linear machine, and the cogging torque has been studied. Although the magnetic field analysis model of motors with different structures have been accurately established in the above-mentioned analytical methods, they were all aimed at the structure of single-axis motor, the two-axis motors proposed in this paper were not completely applicable.…”

Section: Introductionmentioning

confidence: 99%

Analytical No‐Load Magnetic Field Model Taking Account of the Curvature Coefficient for Parallel Direct‐Driven Conjoined Permanent Magnet Synchronous Motor

Dai

Guo

et al. 2021

IEEJ Transactions Elec Engng

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This paper proposes an analytical no-load magnetic field model taking account of the curvature coefficient to compute the noload magnetic field of parallel direct-driven conjoined permanent magnet synchronous motor (PDC-PMSM). The shortcomings of the 3-D finite element method are avoided, such as the time-consuming and sensitive to finite element meshes. As well as, putting forward the design method of the motor. A 2-D subdomain model of PDC-PMSM can be obtained by segment 3-D model at the average radius, which is quasi to linear permanent magnet synchronous motor. Based on Maxwell's equations, the Poisson's equations in the permanent magnet (PM) subdomain and the Laplace's equations in the subdomain between air gap and PM are calculated under no-load condition. The radial and tangential flux density of each subdomain are obtained by the Fourier's series, hyperbolic functions, separation of variables, and the boundary condition. Better yet, the curvature coefficient is introduced to reduce the error between the analytical magnetic field in the planar model and the tubular model. The analytical no-load magnetic field model is established more accurately. The expression of curvature coefficient and back-electromotive force are derived. One prototype is manufactured for simulation and experimental study. The accuracy and feasibility of the proposed model are verified by the prototype test.

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“…Therefore, its torque density could be improved greatly [2,3]. The extensive research have been made by many scholars [4][5][6][7],which promotes the development of electric vehicle industry greatly. However, TFPMM has the disadvantage of large torque ripple which would bring mechanical vibration and noise to the system and affect the safety,the comfort and even the control accuracy of the whole system.…”

Section: Introductionmentioning

confidence: 99%

Torque Optimization of Building-Block Transverse Flux Permanent Magnet Motor Based on QGAs

Pei

Wang

Han

et al. 2021

Lecture Notes in Electrical Engineering

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Building-block transverse flux permanent magnet motor(B-TFPMM) has the characteristics of low-speed high-torque and small axial size, which is suitable as the hub motor of direct-driving electric vehicle. However, the torque ripple of B-TFPMM is large, which would affect the driving safety and riding comfort. To optimize the motor torque, the topological structure and working principle of B-TFPMM are analyzed firstly, and the analytical model of B-TFPMM torque ripple rate is derived. Then, two quantum genetic algorithms (QGAs) with different evolution processes are presented, an optimal individual selection scheme considering the torque ripple and the average torque simultaneously are proposed and the main motor sizes that affecting the torque ripple are optimized. The result shows that one of the strategies has more obvious suppression effect on torque ripple, while the other one has more obvious optimization effect on average torque. Therefore, the appropriate strategy could be selected according to the specific need.Keywords: Quantum genetic algorithm • Building-block transverse flux permanent magnet motor • Torque optimization • Motor design

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Presentation of a Novel Transverse-Flux Permanent Magnet Linear Motor and Its Magnetic Field Analysis Based on Schwarz–Christoffel Mapping Method

Cited by 28 publications

References 10 publications

Coupled Circuit and Magnetic Model for a Transverse Flux Permanent Magnet Linear Motor

Coupled Circuit and Magnetic Model for a Transverse Flux Permanent Magnet Linear Motor

Analytical No‐Load Magnetic Field Model Taking Account of the Curvature Coefficient for Parallel Direct‐Driven Conjoined Permanent Magnet Synchronous Motor

Torque Optimization of Building-Block Transverse Flux Permanent Magnet Motor Based on QGAs

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