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.

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 Load characteristic analysis of a double-side internal coreless stator axial flux PMG

2019 ◽  
Vol 10 (1) ◽  
pp. 17
Author(s):  
Ketut Wirtayasa ◽  
Pudji Irasari ◽  
Muhammad Kasim ◽  
Puji Widiyanto ◽  
Muhammad Fathul Hikmawan
Keyword(s):  
Permanent Magnet ◽  
Output Power ◽  
Power Efficiency ◽  
Voltage Regulation ◽  
Resistive Load ◽  
Characteristic Analysis ◽  
Axial Flux ◽  
Load Characteristic ◽  
In Series ◽  
The Difference

The main issue of using a permanent magnet in electric machines is the presence of cogging torque. Several methods have been introduced to eliminate it, one of which is by employing a coreless stator. In this paper, the load characteristic analysis of the double-side internal coreless stator axial flux permanent magnet generator with the specification of 1 kW, 220 V, 50 Hz, 300 rpm and 1 phase is discussed. The purpose is to learn the effect of the load to the generator performance, particularly the output power, efficiency and voltage regulation. The design and analysis are conducted analytically and numerically with two types of simulated loads, pure resistive and resistive-inductive in series. Each type of load provides power factor 1 and 0.85 respectively. The simulation results show that when loaded with resistive load, the generator gives a better performance at the output power (1,241 W) and efficiency (91 %), whereas a better voltage regulator (5.86 %) is achieved when it is loaded with impedance. Since the difference in the value of each parameter being compared is relatively small, it can be concluded that the generator represents good performance in both loads.

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.

Modeling and Simulation of the Marine Permanent Magnet Synchronous Propulsion Motor with Direct Torque Control System

2013 ◽  
Vol 655-657 ◽  
pp. 612-619
Author(s):  
Chun Lai Zhang ◽  
Jin Nan Zhang
Keyword(s):  
Permanent Magnet ◽  
Electric Propulsion ◽  
High Efficiency ◽  
Control Method ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Switching Frequency ◽  
Electric Ship ◽  
Space Vectors

New quick-response and high efficiency direct torque control method of Permanent magnet synchronous motor is proposed. The new method is realized by optimizing the switching frequency of the inverter and choosing the most fit voltage space vectors. Modeling and simulating such marine electric propulsion system using Matlab/Simulink is performed. The starting-up and dynamic simulation results prove that this method can be fully used onboard the future all electric ship.

scholarly journals Comparison of GAN, SIC, SI Technology for High Frequency and High Efficiency Inverters

2020 ◽  
Vol 184 ◽  
pp. 01012
Author(s):  
Sai Kiran Pullabhatla ◽  
Phaneendra Babu Bobba ◽  
Satyavani Yadlapalli
Keyword(s):  
Output Power ◽  
Electron Mobility ◽  
High Frequency ◽  
Power Efficiency ◽  
High Efficiency ◽  
High Electron Mobility Transistor ◽  
Electronic Systems ◽  
High Electron ◽  
Power Semiconductor ◽  
Efficient Power

Power semiconductor devices plays a major role in efficient power conversion. As we have Silicon (Si), Silicon Carbide (SiC) and Gallium Nitride (GaN) based power devices, GaN technologies are ideal for working in high frequency power electronic systems (in MHz). Because the GaN has superior electron mobility and bandgap than the SiC and Si it has superior characteristics like low conduction losses, high switching rate so that there is better power efficiency than SiC, Si based inverter. Here we are using the Gan based High-Electron-Mobility Transistor (HEMT) and SiC and Si based mosfet in the inverter. The proposed inverter of different topologies is designed to transfer the power at >1MHz range. Comparison of the three different switches is done by the output power and the efficiency of the inverter. This paper presents the SPICE simulation results of the class d and class e inverter of output power 1KW.

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