Design and analysis of high-speed coreless axial flux permanent magnet generator with circular magnets and coils

Fei, Wei-Zhong; Luk, P.C.K.; Jinupun, Ken

doi:10.1049/iet-epa.2010.0081

Cited by 40 publications

(20 citation statements)

References 11 publications

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“…(12). To achieve this goal of maximizing the power density, the variables are carefully chosen by Eq.…”

Section: Design Optimizationmentioning

confidence: 99%

“…Coreless AFPM machines are also contenders for many power generation applications, particularly direct-drive designs, over a wide range of operating speeds. For instance, coreless AFPM generators have been investigated for application to lowspeed, direct-coupled wind turbine generators [9], mediumspeed applications such as automotive generators [10], and high-speed, direct-coupled gas turbine generators for aerospace applications [11,12]. However, research into low-speed AFPM generators for application to low-cost power platforms is a relatively recent development [13].…”

Section: Introductionmentioning

confidence: 99%

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Design and Performance Analysis of Coreless Axial-Flux Permanent-Magnet Generator for Small Wind Turbines

Chung¹,

You²

2014

Journal of Magnetics

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This paper presents an innovative design for a low-speed, direct-drive, axial-flux permanent-magnet (AFPM) generator with a coreless stator and rotor that is intended for application to small wind turbine power generation systems. The performance of the generator is evaluated and optimized by means of comprehensive 3D electromagnetic finite element analysis. The main focus of this study is to improve the power output and efficiency of wind power generation by investigating the electromagnetic and structural features of a coreless AFPM generator. The design is validated by comparing the performance achieved with a prototype. The results of our comparison demonstrate that the proposed generator has a number of advantages such as a simpler structure, higher efficiency over a wide range of operating speeds, higher energy yield, lighter weight and better power utilization than conventional machines. It would be possible to manufacture low-cost, axial-flux permanent-magnet generators by further developing the proposed design.

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“…(12). To achieve this goal of maximizing the power density, the variables are carefully chosen by Eq.…”

Section: Design Optimizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Performance Analysis of Coreless Axial-Flux Permanent-Magnet Generator for Small Wind Turbines

Chung¹,

You²

2014

Journal of Magnetics

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“…The main sources of torque ripple in coreless AFPMSG are cogging torque, nonsinusoidal back EMF and saturation of the magnetic circuit [9,10]. Several techniques including magnet shaping, pole arc to pole pitch ratio, coil shapes and winding configuration have been proposed to eliminate torque ripples in AFPM machines [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Reduction of Torque Ripple in an Axial Flux Generator Using Arc Shaped Trapezoidal Magnets in an Asymmetric Overhang Configuration

Ikram¹,

Khan²,

Khaliq³

et al. 2016

Journal of Magnetics

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In this paper, model of the axial-flux permanent magnet synchronous generator (AFPMSG) having arc-shaped trapezoidal permanent magnets (PM) is presented. The proposed model reduces the cogging torque and torque ripple, at the expense of lowering the average output torque. Optimization of the proposed model is performed by considering the asymmetric overhang configuration of the PMs, as to make the output torque of the proposed model competitive with the conventional model. The time stepped 3D finite element analysis (FEA) is performed for the comparative analysis. It is demonstrated that the torque ripple of the optimized model is highly reduced as well as average output torque is increased.

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“…Lower prices of high-energy permanent magnets and electronics used in motor fabrication also promote utilization of the motors in a wide range of applications [2]. Permanentmagnet motors come in different geometries, among which is a disctype or axial-flux permanent-magnet (AFPM) motor available in various configurations [3][4][5][6][7]. The AFPM motor's high torque-tovolume ratio, excellent efficiency and flat structure are especially suited to military and transport applications, and motivate researchers to develop new approaches to design AFPM machines [8,9].…”

Section: Introductionmentioning

confidence: 99%

Design Optimization and Analysis of Afpm Synchronous Machine Incorporating Power Density, Thermal Analysis, and Back-Emf THD

Kahourzade¹,

Gandomkar²,

Mahmoudi³

et al. 2013

PIER

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Abstract-This paper presents the design and analysis of an inside-out axial-flux permanent-magnet (AFPM) synchronous machine optimized by genetic algorithm (GA) based sizing equation, finite element analysis (FEA) and finite volume analysis (FVA). The preliminary design is a 2-pole-pair slotted TORUS AFPM machine. The designed motor comprises sinusoidal back-EMF waveforms, maximum power density and the best heat removal. The GA is used to optimize the dimensions of the machine in order to achieve the highest power density. Electromagnetic field analysis of the candidate machines from GA with various dimensions is then put through FEA in order to obtain various motor characteristics. Based on the results from GA and FEA, new candidates are introduced and then put through FVA for thermal behavior evaluation of the designed motors. Techniques like modifying the winding configuration and skewing the permanent magnets are also investigated to attain the most sinusoidal back-EMF waveform and reduced cogging torque. The performance of the designed 1 kW, 3-phase, 50 Hz, 4-pole AFPM synchronous machine is tested in simulation using FEA software. It is found that the simulation results fully agree with the designed technical specifications. It is also found from FVA results that the motor temperature reaches at highest temperature to 87 • C at the rated speed and full load under steady state condition.

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Design and analysis of high-speed coreless axial flux permanent magnet generator with circular magnets and coils

Cited by 40 publications

References 11 publications

Design and Performance Analysis of Coreless Axial-Flux Permanent-Magnet Generator for Small Wind Turbines

Design and Performance Analysis of Coreless Axial-Flux Permanent-Magnet Generator for Small Wind Turbines

Reduction of Torque Ripple in an Axial Flux Generator Using Arc Shaped Trapezoidal Magnets in an Asymmetric Overhang Configuration

Design Optimization and Analysis of Afpm Synchronous Machine Incorporating Power Density, Thermal Analysis, and Back-Emf THD

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