Analysis and Performance Evaluation of Axial Flux Permanent Magnet Motors

Dwivedi, Ankita; Singh, Santosh Kumar; Shriwastava, Rakesh

doi:10.1109/tia.2017.2776210

Cited by 19 publications

(10 citation statements)

References 15 publications

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“…Although the optimization criteria are the same for a given electrical load and magnetic flux density, the optimal value of λ varies depending on the rated power demand, pole pairs and motor structure [55,56]. Additionally, reference [57][58][59][60] pointed out that the reasonable definition of parameters such as magnetic flux density, electrical load and current density could achieve a good estimation of the main geometric dimensions of AFPM motor, which was helpful for the parameter matching and design optimization of subsequent design and analysis of AFPM motors.…”

Section: Sizing Equationmentioning

confidence: 99%

A Review of Axial-Flux Permanent-Magnet Motors: Topological Structures, Design, Optimization and Control Techniques

Hao

Wang

et al. 2022

Machines

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Axial-flux permanent-magnet (AFPM) motors are a kind of important motor with compact structure, high power density and high torque density. In this review, the progress of AFPM motors and their key technologies are analyzed and described, with emphasis on the topological structures, design and optimization methods and control techniques. Based on these analyses, the main findings of the review are the following: (1) the yokeless and segment armature (YASA)-type motors have great potential for development; (2) the multi-objective optimization design theories can be integrated and applied to optimize the design of AFPM motors; and (3) optimal control and sensorless control have important value in improving system reliability and reducing cost. Finally, highlights and prospects are provided for further advancing AFPM motors.

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Section: Sizing Equationmentioning

confidence: 99%

A Review of Axial-Flux Permanent-Magnet Motors: Topological Structures, Design, Optimization and Control Techniques

Hao

Wang

et al. 2022

Machines

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“…In order to avoid the mechanical gears, the axial flux permanent magnet (AFPM) machine has recently attracted much attention from scholars [7][8][9]. The high aspect ratio gives them many advantages such as compactness, high torque density, and good heat dissipation [10,11], which makes AFPM machines very suitable for direct-drive systems [12].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Novel Axial-Radial Flux Permanent Magnet Machine with Halbach-Array Permanent Magnets

et al. 2021

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Electric machines with high torque density are needed in many applications, such as electric vehicles, electric robotics, electric ships, electric aircraft, etc. and they can avoid planetary gears thus reducing manufacturing costs. This paper presents a novel axial-radial flux permanent magnet (ARFPM) machine with high torque density. The proposed ARFPM machine integrates both axial-flux and radial-flux machine topologies in a compact space, which effectively improves the copper utilization of the machine. First, the radial rotor can balance the large axial forces on axial rotors and prevent them from deforming due to the forces. On the other hand, the machine adopts Halbach-array permanent magnets (PMs) on the rotors to suppress air-gap flux density harmonics. Also, the Halbach-array PMs can reduce the total attracted force on axial rotors. The operational principle of the ARFPM machine was investigated and analyzed. Then, 3D finite-element analysis (FEA) was conducted to show the merits of the ARFPM machine. Demonstration results with different parameters are compared to obtain an optimal structure. These indicated that the proposed ARFPM machine with Halbach-array PMs can achieve a more sinusoidal back electromotive force (EMF). In addition, a comparative analysis was conducted for the proposed ARFPM machine. The machine was compared with a conventional axial-flux permanent magnet (AFPM) machine and a radial-flux permanent magnet (RFPM) machine based on the same dimensions. This showed that the proposed ARFPM machine had the highest torque density and relatively small torque ripple.

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“…Though the three-dimensional finite element method (3D FEM) could be used to analyze the AFPMSM, it is not suitable for the optimizing due to that the calculation amount is rather large and it is time consuming. Thus, the equivalent magnetic network model and analytical model of the AFPMSM have been investigated [17][18][19][20][21][22][23][24][25][26]. The equivalent magnetic network model of a single-stator double-rotor AFPMSM with coreless stator is investigated in [17].…”

Section: Introductionmentioning

confidence: 99%

Multi-layer quasi three-dimensional equivalent model of axial-flux permanent magnet synchronous machine

Peng

et al. 2021

Trans. Electr. Mach. Syst.

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Axial-flux permanent magnet synchronous machine (AFPMSM) enjoys the merits of high torque density and high efficiency, which make it one good candidate in the direct-drive application. The AFPMSM is usually analyzed based on the three-dimensional finite element method (3D FEM) due to its three-dimensional magnetic field distribution. However, the 3D FEM suffers large amount of calculation, time-consuming and is not suitable for the optimization of AFPMSM. Addressing this issue, a multi-layer quasi three-dimensional equivalent model of the AFPMSM is investigated in this paper, which could take the end leakage into consideration. Firstly, the multi-layer quasi three-dimensional equivalent model of the AFPMSM with single stator and single rotor is derived in details, including the equivalent processes and conversions of structure dimensions, motion conditions and electromagnetic parameters. Then, to consider the influence of end leakage on the performance, a correction factor is introduced in the multi-layer quasi three-dimensional equivalent model. Finally, the proposed multi-layer quasi three-dimensional equivalent model is verified by the 3D FEM based on an AFPMSM under different structure parameters. It demonstrates that the errors of flux linkage and average torque obtained by the multi-layer quasi three-dimensional equivalent model and 3D FEM are only around 2% although the structure parameters of the AFPMSM are varied. Besides, the computation time of one case based on the multi-layer quasi three-dimensional equivalent model is only 6 min, which is much less than that of the 3D FEM, 1.8 h, under the same conditions. Thus, the proposed multi-layer quasi three-dimensional equivalent model could be used to optimize the AFPMSM and much time could be saved by this method compared with the 3D FEM.

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Analysis and Performance Evaluation of Axial Flux Permanent Magnet Motors

Cited by 19 publications

References 15 publications

A Review of Axial-Flux Permanent-Magnet Motors: Topological Structures, Design, Optimization and Control Techniques

A Review of Axial-Flux Permanent-Magnet Motors: Topological Structures, Design, Optimization and Control Techniques

Design and Analysis of a Novel Axial-Radial Flux Permanent Magnet Machine with Halbach-Array Permanent Magnets

Multi-layer quasi three-dimensional equivalent model of axial-flux permanent magnet synchronous machine

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