scholarly journals Efek Air Gap pada Rancang Bangun dan Uji Performa Generator Listrik Fluks Aksial Berbasis Magnet Permanen NdFeB

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Ahmad Maulana
Keyword(s):  
Performance Analysis ◽  
Permanent Magnet ◽  
Rotational Speed ◽  
Output Voltage ◽  
Permanent Magnets ◽  
Air Gap ◽  
Axial Flux ◽  
Ndfeb Magnets ◽  
Magnetic Remanence ◽  
Electrical Generator

Abstrak:Dalam penelitian ini telah dianalisis efek air gap terhadap performa generator listrik tipe fluks aksial berbasismagnet permanen NdFeB. Analisis performa dilakukan dengan mengukur output tegangan generator listrik fluks aksialterhadap ukuran air gap dan kecepatan putar rotor. Air gap antara stator dan rotor divariasikan dari 7 sampai 20 mm. Darihasil eksperimen, peningkatan remanansi magnet berbanding lurus terhadap peningkatan output tegangan. Sebaliknya,peningkatan ukuran air gap menurunkan tegangan output secara linier. Hal ini disebabkan oleh adanya penurunan magnetikflux density secara exponensial. Pada ukuran air gap 7 mm dan kecepatan rotor 1500 rpm, dihasilkan output teganganmaksimal untuk Br = 0,2 dan 1,3 Tesla berturut-turut sebesar 10,4 dan 67,7 volt.Kata Kunci: air gap, generator listrik fluks aksial, ouput tegangan, magnet NdFeBAbstract:In this paper, the effect of air gap to the performance of NdFeB based permanent magnet axial flux electricalgenerator have been analyzed. The performance analysis was performed by measuring the ouput potential of generator asthe changing of air gap and rotational speed of rotor. The air gap was varied from 7 to 20 mm. Based on the experiment, theincreasing of magnetic remanence of permanent magnets was linearly corelated to the increasing of output voltage. On theother hand, increasing of the air gap was linearly reduced the ouput voltage. This effect is caused by the decreasing ofmagnetic flux densityexponentially. On the fixed air gap of 7 mm androtational speed of 1500 rpm, the maximum ouputvoltage is achived for Br = 0.2 and 1.3 Tesla  with the value of 10.4 and 67.7 volt, respectively.Keywords: air gap, axial flux electrical generator, ouput voltage, NdFeB magnets

scholarly journals The Air Gap and Angle Optimization in the Axial Flux Permanent Magnet Motor

1970 ◽  
Vol 110 (4) ◽  
pp. 25-29 ◽  
Author(s):  
C. Akuner ◽  
E. Huner
Keyword(s):  
Magnetic Flux ◽  
Permanent Magnet ◽  
Permanent Magnets ◽  
Air Gap ◽  
Magnetic Flux Density ◽  
Permanent Magnet Motor ◽  
Axial Flux ◽  
Flux Change ◽  
Torque Values ◽  
The Impact

In this study, the axial flux permanent magnet motor and the length range of the air gap between rotors was analyzed and the appropriate length obtained. NdFeB permanent magnets were used in this study. Permanent magnets can change the characteristics of the motor's torque. However, the distance between permanent magnets and the air gap will remain constant for each magnet. The impact of different magnet angles for the axial flux permanent magnet motor and other motor parameters was examined. To this aim, the different angles and torque values of the magnetic flux density were calculated using the finite element method of analysis with the help of Maxwell 3D software. Maximum torque was obtained with magnet angles of 21°, 26°, 31.4°, and 34.4°. Additionally, an important parameter for the axial flux permanent magnet motor in terms of the air gap flux was analyzed. Minimum flux change was obtained with a magnet angle of 26°. The magnetic flux of the magnet-to-air-gap is under 0.5 tesla. Given the height of the coil, the magnet-to-air-gap distance most suitable for the axial flux permanent magnet motor was 4 mm. Ill. 11, bibl. 4, tabl. 2 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.110.4.280

scholarly journals Design of a New 1D Halbach Magnet Array with Good Sinusoidal Magnetic Field by Analyzing the Curved Surface

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2522
Author(s):  
Guangdou Liu ◽  
Shiqin Hou ◽  
Xingping Xu ◽  
Wensheng Xiao
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Permanent Magnet ◽  
Flux Density ◽  
Permanent Magnets ◽  
Air Gap ◽  
Curved Surface ◽  
Magnetic Flux Density ◽  
Sinusoidal Magnetic Field ◽  
The Magnetic Field

In the linear and planar motors, the 1D Halbach magnet array is extensively used. The sinusoidal property of the magnetic field deteriorates by analyzing the magnetic field at a small air gap. Therefore, a new 1D Halbach magnet array is proposed, in which the permanent magnet with a curved surface is applied. Based on the superposition of principle and Fourier series, the magnetic flux density distribution is derived. The optimized curved surface is obtained and fitted by a polynomial. The sinusoidal magnetic field is verified by comparing it with the magnetic flux density of the finite element model. Through the analysis of different dimensions of the permanent magnet array, the optimization result has good applicability. The force ripple can be significantly reduced by the new magnet array. The effect on the mass and air gap is investigated compared with a conventional magnet array with rectangular permanent magnets. In conclusion, the new magnet array design has the scalability to be extended to various sizes of motor and is especially suitable for small air gap applications.

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

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3639
Author(s):  
Rundong Huang ◽  
Chunhua Liu ◽  
Zaixin Song ◽  
Hang Zhao
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
Torque Ripple ◽  
Axial Flux ◽  
Element Analysis ◽  
Torque Density ◽  
Axial Forces ◽  
Halbach Array ◽  
Radial Flux ◽  
High Torque

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.

Design and analysis of a high speed double-sided axial flux permanent magnet motor suspended vertically by magnetic bearings

2020 ◽  
pp. 1-15
Author(s):  
Ömer Faruk Güney ◽  
Ahmet Çelik ◽  
Ahmet Fevzi Bozkurt ◽  
Kadir Erkan
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Permanent Magnets ◽  
Mechanical Analysis ◽  
Magnetic Bearings ◽  
Permanent Magnet Motor ◽  
Axial Flux ◽  
Element Analysis ◽  
Shaft System ◽  
Rotor Disk

This paper presents the electromagnetic and mechanical analysis of an axial flux permanent magnet (AFPM) motor for high speed (12000 rpm) rotor which is vertically suspended by magnetic bearings. In the analysis, a prototype AFPM motor with a double-sided rotor and a coreless stator between the rotors are considered. Firstly, electromagnetic analysis of the motor is carried out by using magnetic equivalent circuit method. Then, the rotor disk thickness is determined based on a rotor axial displacement due to the attractive force between the permanent magnets placed on opposite rotor disks. Hereafter, an analytical solution is carried out to determine the natural frequencies of the rotor-shaft system. Finally, 3D finite element analysis (FEA) is carried out to verify the analytical results and some experimental results are given to verify the analytical and numerical results and prove the stable high-speed operation.

Effect of air gap variation on the performance of single stator single rotor axial flux permanent magnet generator

2017 ◽  
Author(s):  
Muhammad Kasim ◽  
Pudji Irasari ◽  
M. Fathul Hikmawan ◽  
Puji Widiyanto ◽  
Ketut Wirtayasa
Keyword(s):  
Permanent Magnet ◽  
Air Gap ◽  
Axial Flux ◽  
Permanent Magnet Generator

scholarly journals Yokeless Axial Flux Surface-Mounted Permanent Magnets Machine Rotor Parameters Influence on Torque and Back-Emf

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3418
Author(s):  
Stanisław J. Hajnrych ◽  
Rafał Jakubowski ◽  
Jan Szczypior
Keyword(s):  
Permanent Magnets ◽  
Torque Ripple ◽  
Air Gap ◽  
Electric Machine ◽  
Axial Flux ◽  
Flux Surface ◽  
Cogging Torque ◽  
Torque Density ◽  
3D Fea ◽  
The Common

The paper presents the results of a 3D FEA simulations series of a dual air gap Axial Flux (AF) electric machine with Surface-Mounted Permanent magnets (SPM) with parameterized rotor geometry. Pole number and pole span influence on back-emf, as well as cogging and ideal electromagnetic torques angular characteristics were investigated for each model with the common segmented yokeless stator with concentric windings. Synchronous and BLDC drives supply were used to estimate back-emf distortion. Ideal torque ripple and cogging torque spectra were analyzed. It was concluded that the number of poles closer to the number of slots with ~0.8 pole span tends to yield good torque density with the lowest cogging torque, back-emf distortion and ideal torque ripple.

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