scholarly journals The Effects of Cogging Torque Reduction in Axial Flux Machines

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 323
Author(s):  
Samuel Mengesha ◽  
Shailendra Rajput ◽  
Simon Lineykin ◽  
Moshe Averbukh
Keyword(s):  
Permanent Magnet ◽  
Output Power ◽  
High Efficiency ◽  
Experimental Testing ◽  
Axial Flux ◽  
Optimal Angle ◽  
Cogging Torque ◽  
Good Potential ◽  
Low Mass ◽  
The Impact

An axial flux permanent magnet single-rotor generator has good potential in various applications that require high efficiency, prolonged service life, as well as low mass and dimensions. However, the effect of cogging torque diminishes generator efficiency and flexibility of functionality. The effect of cogging torque arises because of a small air gap between the stator teeth and the rotor. In this article, we suggest that shifting the opposite teeth of the stator to the optimal angle can reduce the effect of cogging torque. A special axial flux permanent magnet generator is developed to choose the optimal disposition of the permanent magnet and stator teeth in the frame. The impact of the optimal angle on the cogging torque, output power, and generator efficiency is investigated. This analytical study with experimental testing proves that the optimal angle between opposite teeth can significantly decrease cogging torque and improve output power and efficiency. The results show that cogging torque decreases significantly (4–5 times) at an optimal angle of 7.5° as compared with that of other angles, although magnetic flux and output power decline slightly but efficiency increases.

scholarly journals Desain dan Simulasi GMP Fluks Aksial Berbasis Dimensi Magnet Permanen Komersil

2020 ◽  
Vol 8 (3) ◽  
pp. 602
Author(s):  
PUDJI IRASARI ◽  
PUJI WIDIYANTO ◽  
MUHAMMAD FATHUL HIKMAWAN
Keyword(s):  
Permanent Magnet ◽  
Output Power ◽  
Permanent Magnets ◽  
High Efficiency ◽  
Voltage Drop ◽  
Design Calculation ◽  
Axial Flux ◽  
Terminal Voltage ◽  
Permanent Magnet Generators ◽  
Simulation Results

ABSTRAKMakalah ini membahas desain dan simulasi generator magnet permanen fluks aksial 500 W, 220 V, 500 rpm, 1 fasa, stator tunggal tanpa inti besi lunak dan rotor ganda berbahan baja karbon. Tujuan studi adalah untuk mengetahui performa generator pada dua jenis pembebanan yaitu beban RL dan ZL. Metode perhitungan desain dilakukan secara analitik dan numerik menggunakan perangkat lunak FEMM 4.2 dengan berbasis pada dimensi magnet permanen komersil. Performa generator yang dianalisis meliputi tegangan terminal, daya keluaran dan efisiensi. Hasil simulasi menunjukkan bahwa ketika diberi beban RL, daya keluaran dan efisiensi generator lebih tinggi dibanding ketika diberi beban ZL. Grafik tegangan terminal dari kedua jenis pembebanan tersebut sebagian berimpit tetapi pada beban RL tingkat penurunannya lebih tajam disebabkan tegangan jatuhnya lebih besar. Dari semua hasil perhitungan dan simulasi, dapat disimpulkan bahwa generator menunjukkan performa yang baik pada kedua jenis pembebanan dengan efisiensi sekitar 80%.Kata kunci: generator, magnet permanen, fluks aksial, stator tunggal, rotor ganda ABSTRACTThis paper discusses the design and simulation of 500 W, 220 V, 500 rpm axial flux permanent magnet generators, with the construction of coreless, single stator, and double rotor made of carbon steel. This study aims to find out the performance of the generators in two types of loadings, namely RL and ZL loads. The design calculation method is done analytically and numerically using FEMM 4.2 software based on the dimensions of commercial permanent magnets. The generator performances analyzed include the terminal voltage, the output power, and the efficiency. From the simulation results, it is known that under load RL, the output power and efficiency are higher than under load ZL. The terminal voltage graphs of the two types of loadings partially coincide but at the RL load, the rate of the decline is sharper due to the greater voltage drop. From all the results, it can be concluded that the generator shows good performance on both types of loads with a quite high efficiency, which is around 80%.Keywords: generator, permanent magnet, axial flux, single stator, double rotor

scholarly journals Axial-Flux Permanent-Magnet Generator Design for Hybrid Electric Propulsion Drone Applications

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8509
Author(s):  
Ji-Young Lee ◽  
Ji-Heon Lee ◽  
Tung Khanh Nguyen
Keyword(s):  
Permanent Magnet ◽  
Output Power ◽  
Power Efficiency ◽  
Electric Propulsion ◽  
High Efficiency ◽  
Mechanical Stability ◽  
Thermal Characteristics ◽  
Axial Flux ◽  
Magnetization Direction ◽  
Hybrid Electric

This paper presents the design of an axial-flux permanent-magnet (AFPM) generator used for hybrid electric propulsion drone applications. The design objectives of the AFPM generator are high power density, which is defined as output power per generator weight, and high efficiency. In order to satisfy the requirements for the target application and consider the practical problems in the manufacturing process, the structure of the AFPM generator comprising a double-rotor single-stator (DR-SS) was studied. In order to determine the rotor topology and stator winding specifications that had the greatest impact on performance in the DR-SS type design process, we selected three rotor models according to the arrangement of the magnetization direction and three stator models according to the coreless winding specifications. These models were first compared and analyzed. Then, a 3-D finite element method was performed to calculate the magnetic, mechanical, and thermal characteristics of the designed models. By consideration of the output power, efficiency, temperature, and mechanical stability, etc., a topology suitable for the design of generators for UAV systems was determined and manufactured. The reliability of the design result was confirmed through the test.

Optimization of Magnets Shape for Cogging Torque Reduction in Axial-Flux Permanent Magnet Motors

2021 ◽  
pp. 1-1
Author(s):  
Vicente Simon-Sempere ◽  
Auxiliadora Simon-Gomez ◽  
Manuel Burgos ◽  
Jose-Ramon Cerquides-Bueno
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Motors ◽  
Axial Flux ◽  
Cogging Torque

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 PENGARUH JUMLAH LILITAN KUMPARAN STATOR TERHADAP KINERJA GENERATOR MAGNTE PERMANEN FLUKS AKSIAL SATU FASA

2020 ◽  
Vol 2 (2) ◽  
pp. 28-31
Author(s):  
Agus Nur Hidayat ◽  
Suyitno ◽  
Daryanto
Keyword(s):  
Permanent Magnet ◽  
Experimental Method ◽  
Output Power ◽  
Single Phase ◽  
Induced Voltage ◽  
Axial Flux ◽  
Incandescent Lamps ◽  
Coil Shape ◽  
Permanent Magnet Generator

The purpose of this research is to know to know the influence of stator coil shape to performance (induced voltage and output power) of single phase axial flux permanent magnet generator. The method used is an experimental method. The population in this study is a unit of single phase axial flux permanent magnet generator. The sample in this study is the stator coil. Experiments were carried out by testing the performance of a single-phase axial flux permanent magnet generator in each variation the number of coil windings which had the 90 turns, 120 turns, and 350 turns. Experiments were carried out with no -load testing and with a resitive load that used 30 Watt incandescent lamps. The conclusion of this study shows that there is an influence from the number of coil windings on the performance (induced voltage and output power) of the generator. From three variations of the stator coil that used as sample, the highest performance is shown by the single phase axial flux permanent magnet generator which used the highest number of coil stator turns. The more number of turns, the better the performance of a single-phase axial flux permanent magnet generator. Abstrak Tujuan dari penelitian ini adalah untuk mengetahui pengaruh jumlah lilitan kumparan stator terhadap kinerja generator fluks aksial satu fasa yang berupa tegangan induksi dan daya listrik yang dihasilkan. Metode yang digunakan adalah metode eksperimen. Populasi pada penelitian ini ialah satu unit generator magnet permanen fluks aksial satu fasa. Sampel pada penelitian ini ialah kumparan stator. Eksperimen dilakukan dengan menguji kinerja generator magnet permanen fluks aksial satu fasa pada setiap variasi jumlah lilitan kumparan stator 90 lilitan, 120 lilitan, dan 350 lilitan. Ekperimen dilakukan dengan pengujian tanpa beban dan dengan beban resitif berupa lampu pijar 30 Watt. Kesimpulan pada penelitian ini menunjukkan bahwa adanya pengaruh jumlah lilitan kumparan stator terhadap kinerja generator yang berupa tegangan induksi dan daya listrik keluaran. Dari ketiga variasi sampel kumparan stator, kinerja tertinggi ditunjukkan oleh generator magnet permanen fluks aksial satu fasa yang menggunakan jumlah lilitan kumparan stator terbanyak. Semakin banyak jumlah lilitan, semakin baik kinerja generator magnet permanen fluks aksial satu fasa.

Cogging Torque Optimization of Axial Flux Permanent Magnet Motor

2013 ◽  
Vol 49 (5) ◽  
pp. 2189-2192 ◽  
Author(s):  
Dong-Kyun Woo ◽  
Il-Woo Kim ◽  
Dong-Kuk Lim ◽  
Jong-Suk Ro ◽  
Hyun-Kyo Jung
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Motor ◽  
Axial Flux ◽  
Cogging Torque
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