Improved design of axial flux permanent magnet generator for small-scale wind turbine

Eldoromi, Mojtaba; Tohidi, Sajjad; Feyzi, Mohammad Reza; Rostami, Naghi; Emadifar, Reza

doi:10.3906/elk-1711-402

Cited by 4 publications

(6 citation statements)

References 23 publications

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“…The results obtained are also compared to other counter generators that are characterized with air-cored, AFPMs with SSDR configuration and rated power in the range of 500 to 1000 W. A limited number of research articles [46][47][48] have disclosed some of their design data and have been used for comparison purposes in this paper. The comparison results for the main parameters between the proposed ACAF PMG and the counter generators are summarized in Table 6.…”

Section: Testing the Acaf Pmg At No-loadmentioning

confidence: 99%

Air‐cored axial flux permanent magnet generator for direct driven micro wind turbines

El‐Hasan

2023

IET Renewable Power Gen

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This paper presents the development of an Air‐Cored Axial Flux Permanent Magnet Generator (ACAF PMG) integrated for direct battery charging scheme for urban and rural micro‐wind turbine applications rated at 1 kW. The proposed generator has a Single Stator Double Rotor configuration with a relatively short axial length. In this paper, the analytical model for generator sizing is presented and the main parameters are defined. Novel analytical model is presented to determine the required number of turns for each phase in order to produce a balanced voltage in the three phases. The generator is electromagnetically analyzed using Finite Element model and simulated using Matlab/Simulink to predict its performance under several operating conditions. The effect of retainment ring type on the generator performance is also demonstrated. The machine is harnessed to a battery bank via a three‐phase fully controlled converter using six bridge thyristors to regulate the output voltage delivered from the generator to the battery. Generator model and simulation results are validated via experimental tests. The preliminary experimental results showed a good match with the simulation results. Moreover, the proposed machine is compared favourably with other counter machines of similar configuration and power ratings in terms of machine size, power‐to‐weight ratio, and voltage regulation. This paper therefore demonstrates the concrete benefits of utilizing the axial flux PMG in scavenging energy to generate electrical power from micro wind turbines.

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Section: Testing the Acaf Pmg At No-loadmentioning

confidence: 99%

Air‐cored axial flux permanent magnet generator for direct driven micro wind turbines

El‐Hasan

2023

IET Renewable Power Gen

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“…The axial fl ux synchronous magnetoelectric generator with combined excitation combines the advantages of permanent magnet generators with the simultaneous possibility of controlling the magnetic fl ux in the air gap using one or more additional magnetizing windings [1,2]. This design is promising for use in wind power plants [3,4], as it allows you to abandon the multiplier and expand the limits of regulation of the autonomous wind power system [5,6]. A low speed of rotation of the rotor is typical for electric generators working as part of multiplierless installations.…”

Section: Introductionmentioning

confidence: 99%

“…The axial fl ux generator with permanent magnets (AFGPM) does not have this drawback. The use of a double stator allows you to increase the specifi c power and use the useful volume of the electric machine more effi ciently [5]. In combination with an additional magnetizing winding, such a generator has wide opportunities for adjusting the output parameters.…”

Section: Introductionmentioning

confidence: 99%

Mathematical simulation of autonomous wind electric installation with magnetoelectric generator

Golovko¹,

Ostroverkhov²,

Kovalenko³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. Development of a mathematical model of an autonomous wind power plant based on an end-generator with a double stator and combined excitation to evaluate methods for improving the efficiency of conversion of mechanical wind energy into electricity. Methodology. The research used methods of general theory of wind power plants, methods of mathematical modeling, which are based on the numerical solution of nonlinear differential equations to evaluate methods for correcting the output power in Matlab-Simulink by modifying standard units. Findings. A numerical simulation mathematical model of an autonomous wind power plant consisting of a magnetoelectric generator with an axial magnetic flux with combined excitation and a double stator has been developed. The model was created to study the parameters and characteristics of the installation, as well as to evaluate methods and means to improve the efficiency of conversion of wind energy into electricity. According to the research, it is established that a more effective method for regulating the output power of the generator in the wind turbine is the use of additional winding for magnetization, compared with the use of additional capacity. The latter provides up to 716% increase in output power, while using the magnetizing winding can increase the output power to 3235%. The results obtained by the authors allow further developing a number of methods to increase the efficiency of conversion of mechanical energy of the wind turbine rotor into electrical energy. Originality. The mathematical model developed for the first time, in contrast to the existing ones, takes into account the presence of a double stator, an additional winding for magnetization of the magnetic system and the axial nature of the circuit of the main and additional magnetic flux. The developed model also takes into account the change in the parameters of the electric generator with axial magnetic flux when changing the parameters of the wind, the rotor of the wind turbine and the load. The model is designed to analyze the possibility of adjusting the output power of the generator when the wind speed changes. Practical value. The simulation results indicate the prospects of industrial implementation of wind power plant based on magnetoelectric generator for their use as autonomous electrical installations and as part of shunting power systems.

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“…Generally, the high power density DDPMSGs studied by the majority of scholars can be divided into radial-flux PMSGs, axial-flux PMSGs and transverse-flux PMSGs, based on the direction of flux penetration. The axial-flux PMSG is suitable for low-speed, direct-drive wind energy conversion systems because of their compactness and high power density [7][8][9]. However, it has the disadvantages of axial magnetic pull force, complicated processing technology and high manufacturing cost.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a direct‐drive permanent magnet synchronous generator with novel toroidal winding

Wei

Zeng

et al. 2021

IET Renewable Power Gen

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Direct-drive permanent magnet synchronous generators (DDPMSGs) are gaining more and more attention in the field of wind power because of the advantages of simple structure, high efficiency and high reliability. However, due to the extremely low rotational speed, large volume and heavy weight of DDPMSGs, it poses serious challenges for transportation and installation, which limits its application. Therefore, a DDPMSG with novel toroidal windings (NTW) is proposed to improve power density in this paper. Unlike regular windings, each coil of the NTWs is wound onto the stator yoke in the same direction. The special configuration enables the generator to have higher winding coefficient, so that the DDPMSG with NTWs (NTW-DDPMSG) can achieve higher power density than traditional fractional slot concentrated windings (FCW). The proposed topology and operating principles are described in detail. To verify the merits of the proposed NTW-DDPMSG, the electromagnetic parameters of two external rotor surface-mounted DDPMSGs equipped with NTW and FCW respectively are designed. The characteristics of air-gap magnetic field, no-load electromotive force, output power, loss and efficiency are analysed on the conditions of different loads and speeds. Comparison results show that the proposed NTW-DDPMSG has higher power density than FCW-DDPMSG.

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Improved design of axial flux permanent magnet generator for small-scale wind turbine

Cited by 4 publications

References 23 publications

Air‐cored axial flux permanent magnet generator for direct driven micro wind turbines

Air‐cored axial flux permanent magnet generator for direct driven micro wind turbines

Mathematical simulation of autonomous wind electric installation with magnetoelectric generator

Analysis of a direct‐drive permanent magnet synchronous generator with novel toroidal winding

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