Field Reconstruction Method in Axial Flux Permanent Magnet Motor With Overhang Structure

Park, Hyeon-Jeong; Jung, Hyun-Kyo; Jung, Sang-Yong; Chae, Young-Hoon; Woo, Dong-Kyun

doi:10.1109/tmag.2017.2653839

Cited by 26 publications

(9 citation statements)

References 5 publications

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“…According to [10], cogging torque T cogging can be calculated by integrating the discrete torque for each element e , and it follows that

T_{italiccogging} = {false\sum}_{e = 1}^{M} (\oint_{Δ e} (r_{e} \times f_{t}) d s)

where M is the total number of elements calculated, r e represents the distance from the element e and the center point, and Δ e is the surface of element e .…”

Section: Calculation Model Of Cogging Torquementioning

confidence: 99%

“…The analytical method has higher precision and shorter time‐consuming. Taking end effect into account, field reconstruction method (FRM) can reduce the burden of FEM and predict the magnetic field inside AFPM machines accurately [9,10]. However, too many rotor basis functions need to be established in FRM, making the calculation complicated and time‐consuming.…”

Section: Introductionmentioning

confidence: 99%

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Cogging Torque Computation and Optimization in Dual‐Stator Axial Flux Permanent Magnet Machines

Zhang

Liu

2020

IEEJ Transactions Elec Engng

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Combining Schwarz–Christoffel transformation, magnetic field reconstruction method, and Maxwell stress tensor method, the calculation model of cogging torque of a dual‐stator axial flux permanent magnet machine is established. The end effect and slotting effect are both been taken into account. The results are verified by finite element method. And with the proposed method, calculation time can be significantly reduced compared with finite element method. Three measures to reduce the cogging torque of dual‐stator axial flux permanent magnet machines are discussed based on which the cogging torque is optimized by genetic algorithm. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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“…According to [10], cogging torque T cogging can be calculated by integrating the discrete torque for each element e , and it follows that

T_{italiccogging} = {false\sum}_{e = 1}^{M} (\oint_{Δ e} (r_{e} \times f_{t}) d s)

where M is the total number of elements calculated, r e represents the distance from the element e and the center point, and Δ e is the surface of element e .…”

Section: Calculation Model Of Cogging Torquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cogging Torque Computation and Optimization in Dual‐Stator Axial Flux Permanent Magnet Machines

Zhang

Liu

2020

IEEJ Transactions Elec Engng

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“…It is noted that the armature current and permanent magnets generate magnetic flux in the air gap. However, most part of the flux is due to permanent magnets [26]. According to Figure 2, the magnetic fluxes of permanent magnets pass through the air gap and then enter into the stator core.…”

Section: Torus Ns-afpm Structurementioning

confidence: 99%

An analytical formula for selecting the feeding voltage and frequency in aTORUS-type nonslotted axial flux permanent magnet machine design

Mirzahosseini¹,

Darabi²,

Assili³

2019

Turk J Elec Eng & Comp Sci

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Axial flux permanent magnet (AFPM) motors are usually controlled by drive; therefore, in the design of these machines the feeding voltage and frequency are completely independent parameters. Undoubtedly, the values of these parameters have significant effects on the performance characteristics of the machine. The main objective of this paper is to investigate the effects of these parameters on the efficiency of a double-sided TORUS-type nonslotted (TORUS NS) AFPM motor and propose a formula for selecting the optimal values of the feeding voltage and frequency at the beginning of the design process. To fulfill this goal, different machines with various speeds, powers, and feeding voltages are designed based on a proposed design algorithm. Then a formula for calculating machine efficiency is presented based on the frequency, number of pole pairs, output power, and feeding voltage of the machine. In order to confirm the validity of the proposed formula, several fabricated machines with different powers and speeds are selected as case studies. The efficiency of these machines is calculated using the proposed formula and is measured in the laboratory. Comparing the results confirms the excellent accuracy of the proposed formula.

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“…The FRM is a method of reconstructing the entire field using the air-gap magnetic flux distribution obtained by static FE analysis. It reconstructs each of the armature reaction field and the opencircuit field using the basis function [17][18][19][20]. The basis function sweeps the reference flux distribution obtained using a snapshot through the FE analysis.…”

Section: Introductionmentioning

confidence: 99%

Linear tubular permanent magnet motor for an electromagnetic active suspension system

Kim

Woo

2021

IET Electric Power Appl

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This work presents the comparative study of the linear tubular permanent magnet motor (LTPMM) for the active suspension system in vehicles. To analyse and design the LTPMM, a finite element-based optimisation process is proposed. Since the proposed method reconstructs the entire field by storing the information of the air-gap magnetic flux distribution in the form of a snapshot, it provides high accuracy and a reduced computation time. The magnetic fields are analysed in LTPMMs with external and internal permanent magnets that are classified according to the position of the permanent magnet. In the comparative analysis, an optimal model for the LTPMM is presented, taking into account characteristics such as thrust, detent force and THD. Especially, various magnetisation patterns are considered to accomplish high force density. The analytical model is verified by performing finite element analysis and experiments.

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Field Reconstruction Method in Axial Flux Permanent Magnet Motor With Overhang Structure

Cited by 26 publications

References 5 publications

Cogging Torque Computation and Optimization in Dual‐Stator Axial Flux Permanent Magnet Machines

Cogging Torque Computation and Optimization in Dual‐Stator Axial Flux Permanent Magnet Machines

An analytical formula for selecting the feeding voltage and frequency in aTORUS-type nonslotted axial flux permanent magnet machine design

Linear tubular permanent magnet motor for an electromagnetic active suspension system

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