A Complete Quasi-3-D Analytical Model of No-Load Magnetic Field of Double-Sided Slotted AFPMMs Considering End Effect

Tong, Wenming; Wang, Shuai; Wu, Shengnan; Tang, Renyuan

doi:10.1109/access.2018.2875306

Cited by 16 publications

(4 citation statements)

References 23 publications

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“…The finite element grid of the disk hybrid excitation generator is shown in Figure 6. As the rotor of the generator was made of silicon steel, its magnetoresistance was much smaller than that of the air gap, meaning that most of the magnetic field was stored in the air gap [29,30]. For the calculation accuracy, the more grids present in the air gap magnetic field, the higher the calculation accuracy of the model, though the calculation time was The finite element grid of the disk hybrid excitation generator is shown in Figure 6.…”

Section: Establishment Of the Finite Element Modelmentioning

confidence: 99%

“…For the calculation accuracy, the more grids present in the air gap magnetic field, the higher the calculation accuracy of the model, though the calculation time was The finite element grid of the disk hybrid excitation generator is shown in Figure 6. As the rotor of the generator was made of silicon steel, its magnetoresistance was much smaller than that of the air gap, meaning that most of the magnetic field was stored in the air gap [29,30]. For the calculation accuracy, the more grids present in the air gap magnetic field, the higher the calculation accuracy of the model, though the calculation time was also longer.…”

Section: Establishment Of the Finite Element Modelmentioning

confidence: 99%

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Magnetic Field Analysis and Development of Disk Axial–Radial Hybrid Excitation Generator for Range Extenders in Extended-Range Electric Vehicles

2024

WEVJ

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Extended-range electric vehicles have both a motor and an engine; the motor is used for driving, and the engine generates electricity via a range extender, which is connected to the motor. The permanent magnet generator is part of the range extender, and the output voltage is controlled by adjusting the engine’s speed; the generator’s rotating speed fluctuates, meaning that the engine’s fuel consumption increases. Meanwhile, considering the limited axial dimension of the range extender, an axial–radial disk hybrid generator that combines excitation is developed, making full use of the radial space; at the same time, the output voltage is adjusted without changing the engine’s speed. In this study, the generator’s magnetic field hybrid principle, the path of permanent magnetic circuit, and the electric excitation magnetic circuit under different loads were analyzed and verified via the finite element method. A comparative analysis method was also used, the technical index of the disk hybrid excitation generator was determined, and the main structural parameters were designed using theoretical calculations. The three-dimensional finite element model was established based on the results, and a finite element analysis was performed. An equivalent magnetic circuit model was established, and the formulas of synthetic permeability, leakage permeability, and effective permeability were determined. The finite element method (numerical method) and equivalent magnetic circuit method (analytical method) were used to calculate the synthetic magnetic fields of the air gap, rotor yoke, and rotor teeth under different excitation currents. A comparison between the two methods verified the design utility. The conclusions provide a valuable point of reference for the development of the disk hybrid excitation generator for use in range extenders in extended-range electric vehicles.

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Section: Establishment Of the Finite Element Modelmentioning

confidence: 99%

Section: Establishment Of the Finite Element Modelmentioning

confidence: 99%

Magnetic Field Analysis and Development of Disk Axial–Radial Hybrid Excitation Generator for Range Extenders in Extended-Range Electric Vehicles

2024

WEVJ

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“…Compared with the analytical method, 2-D finite element method (FEM) and quasi 3-D FEM, the 3-D FEM is timeconsuming and requires a large memory capacity [39], [40]. However, the 3-D FEM is more accurate and can fully consider the curvature effect and edge effect of the YASA machine, which is suitable for multiphysics research.…”

Section: The Axial-flux In-wheel Motormentioning

confidence: 99%

Multiphysics Analysis of an Axial-Flux In-Wheel Motor With an Amorphous Alloy Stator

Zhang

Liang

et al. 2020

IEEE Access

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This paper presents a novel yokeless and segmented armature (YASA) axial-flux in-wheel motor with amorphous magnetic material (AMM) stator cores for a solar-powered electric vehicle. Although this new axial-flux in-wheel motor has many advantages such as high efficiency, shorter axial length, and high power density, its working condition is complicated. In-wheel motors are usually operated in electromagnetic, thermal, and other multiphysics environments. Increasing the performance requirements of in-wheel motors, such as power density, efficiency, and reliability, requires a multiphysics design approach. The focus of this paper is on the analysis of electromagnetic characteristics, losses, temperature distribution, mechanical behavior and other characteristics of the axial-flux in-wheel motor. The back electromotive force (EMF) and electromagnetic torque of the motor with harmonic current are obtained by the 3-D finite element method (FEM). The permanent magnet (PM) eddy-current losses when using different PM shapes are studied. The equivalent thermal model of the tape-wound AMM stator segments and the windings are established, and the temperature distribution of the motor is obtained. The mechanical behavior of the stator segments and the rotor disks when the motor is eccentric and axially offset is analyzed, and the structural strength of the motor is evaluated. Finally, a prototype of the motor is fabricated, and the electromagnetic performance and temperature of the motor are tested to verify the accuracy of the multiphysics design approach.

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“…Methods that rely on the equivalent magnetic circuit methods (EMC) can be also found and consist in drawing a magnetic circuit model of the machine with lumped or distributed reluctances parameters to model the machine's magnetic flux tubes and retrieve quantities like flux linkages and average flux density values [15,16]. A variety of hybrids methods of the previously mentioned ones are also present [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Analytical Modeling of Magnetic Field Distribution at No Load for Surface Mounted Permanent Magnet Machines

Gerlando

Ricca

2023

Energies

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This paper presents an analytical study of the air-gap magnetic field of a Surface Permanent Magnet (SPM) linear machine under no load. By means of the method of images, the complex expression of the magnetic field of a conductor, inside the air gap between two smooth iron surfaces, is retrieved. Then, integrating the conductor expression, the formulation of the magnetic field of a current sheet and thus the one of a SPM, using two vertical current sheets, is obtained. At last, the no-load magnetic field expression, for a generic time instant, of a slotless machine is retrieved. The novelty of the proposed approach is the availability, due to a different calculation approach, of a unique closed-form formulation for the slotless machine air-gap field, a quantity that, in literature, is usually present in Fourier series formulation. Additionally, as a means to calculate integral quantities and show the goodness of the method a complex slotting function is introduced to account for the slotted geometry. Finally, starting from Lorenz’s force formulation, the expression of the Maxwell tensor in complex form is retrieved and the contribution of forces, integral of the complex stress tensor quantity, will be calculated and compared with FEM simulations, showing a good agreement also with the analytical slotted model.

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A Complete Quasi-3-D Analytical Model of No-Load Magnetic Field of Double-Sided Slotted AFPMMs Considering End Effect

Cited by 16 publications

References 23 publications

Magnetic Field Analysis and Development of Disk Axial–Radial Hybrid Excitation Generator for Range Extenders in Extended-Range Electric Vehicles

Magnetic Field Analysis and Development of Disk Axial–Radial Hybrid Excitation Generator for Range Extenders in Extended-Range Electric Vehicles

Multiphysics Analysis of an Axial-Flux In-Wheel Motor With an Amorphous Alloy Stator

Analytical Modeling of Magnetic Field Distribution at No Load for Surface Mounted Permanent Magnet Machines

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