Design of axial flux permanent magnet generators using various magnetic materials in locally manufactured small wind turbines

Latoufis, Kostas; Troullaki, Katerina; Pazios, Thomas; Hatziargyriou, Nikos D.

doi:10.1109/icelmach.2016.7732729

Cited by 20 publications

(16 citation statements)

References 23 publications

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“…The number of turns in each phase can be calculated with respect to (2) and (3). In (10), B mg is the maximum air-gap flux density on the magnet surface (T). This parameter can be calculated from (11) for the conventional coreless stator AFPM (Fig.…”

Section: Analytical Designmentioning

confidence: 99%

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Design and construction of new axial‐flux permanent magnet motor

Yazdi

Saied

Mirimani

2020

IET Electric Power Applications

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The present study investigated the design, simulation, and manufacturing of a new coreless stator axial‐flux permanent‐magnet motor. In addition, to magnets with magnetisation along the motor axis, the new structure included magnets that were magnetised circumferentially and buried at the rotor surface. The electromagnetic design of the conventional axial‐flux motor and the new motor was evaluated according to nominal values and design equations. In this regard, the number of poles and coils, as well as the outer diameter of both motors were assumed to be identical. It was observed that the axial length of the new motor is shorter than the conventional axial‐flux motor. Simulations were continued through comparing the motors in terms of air‐gap flux density, torque, and back electromotive force using the transient finite element method. A comparison of the results showed that the new motor had a better performance than the conventional axial‐flux motor. Subsequently, the new motor was manufactured and tested; the experimental results proved to be close to those presented in the analytical section.

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Section: Analytical Designmentioning

confidence: 99%

“…Coreless AFPM machines have been studied less frequently. Some examples include the multi‐objective optimal design of coreless AFPM machines discussed in [6, 7], fractional slot winding configurations [8], and applications of such machines in wind turbine generators, [8, 9], electric vehicles, [10, 11], and airplanes, [12, 13].…”

Section: Introductionmentioning

confidence: 99%

Design and construction of new axial‐flux permanent magnet motor

Yazdi

Saied

Mirimani

2020

IET Electric Power Applications

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“…Axial-flux permanent magnet synchronous machines (AF-PMSMs) also called the disk type machines are a popular choice for electric vehicles, pumps, fans, aeroplane actuation, robotics and energy sector because of their high-aspect-ratio, planar structure, compactness, high-torque density and high-power density [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of wave winding topologies and performance characteristics in ultra‐thin printed circuit board axial‐flux permanent magnet machine

Paul

Farshadnia

Pouramin

et al. 2019

IET Electric Power Applications

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Axial-flux permanent magnet synchronous machines (AF-PMSM) using printed circuit board (PCB) windings are attracting interest because of an increased demand for machines with thinner geometries. A critical element in designing these machines is the choice of its PCB winding which should ensure high-performance characteristics with an efficient use of the PCB surface. However, there is a gap in the knowledge regarding the performance of different PCB topologies. The research reported here is motivated by the need to compare common wave-type PCB windings stator topologies. Accordingly, overlapping parallel wave, non-overlapping radial wave and overlapping radial wave PCB winding topologies are assessed, using finite-element analysis, and compared based on their key performance characteristics such as the generated backelectromotive forces, inductances and electromagnetic torque. The PCB winding that provides the best torque production is then chosen and manufactured. Experimental tests on the prototyped PCB AF-PMSM provide validation.

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“…A widespread technology with such characteristics is locally manufactured small wind turbines (LMSWTs) [3][4][5][6][7][8]. Available design manuals [9] and online tools [10] have been a reference guide for Non-Governmental Organization (NGOs), technical groups and practitioner networks, to locally manufacture small wind turbines for the electrification of rural communities in developing countries.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Noise of Axial Flux Permanent Magnet Generators in Locally Manufactured Small Wind Turbines

Latoufis

Matzakos

Katsambiris

et al. 2019

IET Renewable Power Generation

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During the last decade, the local manufacturing of small wind turbines has become a common approach in rural electrification applications, especially among international networks of renewable energy practitioners. Locally manufactured small wind turbines (LMSWTs) used in off-grid battery based renewable energy systems, typically utilize coreless axial flux permanent magnet generators (AFPMGs) due to their simple manufacturing. Typically, low cost three phase uncontrolled diode bridge rectifiers are used for the direct coupling of the AFPMG to the battery bank, which increases significantly the total harmonic distortion (THD) content in the stator current. LMSWT users have occasionally reported AFPMG noise as contributing to the overall acoustic noise emissions of the small wind turbine, especially during low wind speeds. In this paper the relation between current harmonics and acoustic noise emissions in AFPMGs is investigated and verified experimentally, while appropriate passive filtering techniques are utilized in order to reduce their effect. Furthermore, the overall acoustic noise emissions of a LMSWT are measured experimentally in the field and are compared to noise standards for residential areas. Finally, electromagnetic and aerodynamic sources of acoustic noise are investigated experimentally in the field, while design recommendations are developed for LMSWTs towards the reduction of acoustic noise emissions.

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Design of axial flux permanent magnet generators using various magnetic materials in locally manufactured small wind turbines

Cited by 20 publications

References 23 publications

Design and construction of new axial‐flux permanent magnet motor

Design and construction of new axial‐flux permanent magnet motor

Comparative analysis of wave winding topologies and performance characteristics in ultra‐thin printed circuit board axial‐flux permanent magnet machine

Acoustic Noise of Axial Flux Permanent Magnet Generators in Locally Manufactured Small Wind Turbines

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