Development and Testing of a Novel Cylindrical Permanent Magnet Linear Generator

Raihan, M. A. H.; Baker, Nick; Smith, K. J.; Almoraya, Ahmed A.

doi:10.1109/tia.2020.2990114

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…To this end, two cylindrical versions of the surface-mounted E-core VHM, derived from the single-sided and double-sided flat variants were designed and tested. They consisted of a three-tooth [37] and a six-tooth [40] stator respectively. The two prototype stators are shown in Figure 7.…”

Section: Cylindrical Topologiesmentioning

confidence: 99%

Development and Wave Tank Demonstration of a Fully Controlled Permanent Magnet Drive for a Heaving Wave Energy Converter

et al. 2022

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One option for converting the energy in sea waves into renewable electricity is the development of floating wave energy converters coupled to electrical generators. For this to work, bespoke slow-speed electrical machines coupled to bidirectional power smoothing power electronic converters are required. This paper reports on the successful design and wave tank validation of an electric machine, power converter and fully controlled direct drive power take-off system coupled to two small scale heaving wave energy converters. The design, development and demonstration of linear generators and power converters is presented including some simulated and laboratory results. Demonstration of wave energy converters with pure electric drives, fully automated control, bidirectional power flow and active force management is almost unique and essential for future wave energy development. The results presented prove that direct-drive power take-off for wave energy devices is technically possible and can be used to implement an automated control system with bidirectional power flow in both resonant and non-resonant wave energy systems.

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Section: Cylindrical Topologiesmentioning

confidence: 99%

Development and Wave Tank Demonstration of a Fully Controlled Permanent Magnet Drive for a Heaving Wave Energy Converter

et al. 2022

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“…In the literature, there are many examples of successful prototypes manufactured from the pre pressed block, either pure SMC [23,24] or some sort of material-hybrid meaning that they use both laminations and SMC components during assembly [21,25]. In this paper, the aim is to build a machine assembled in a manner that is representative of mass production and so bespoke pressed components have been designed.…”

Section: Modular Transverse Flux Machines Fabricated From Soft Magnetic Compositesmentioning

confidence: 99%

Manufacturing Challenges of a Modular Transverse Flux Alternator for Aerospace

2020

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This paper presents the manufacturing challenges of a transverse flux alternator for an aerospace application. For fault tolerance, four independent isolated phases are required to deliver a specific power at low speeds, whilst at over speed, there is a strict limit on the short circuit current. A transverse flux machine (TFM) was selected due to its high inductance combined with the modular nature of separate phases lending itself to fault tolerance. The stator consists of pressed soft magnetic composite (SMC) segments. The authors explore the electromagnetic, mechanical, and assembly design challenges of the machine. It is shown that mechanical design aspects of the segments are of equal importance to the electromagnetic design and optimization. Simple design choices have allowed the same component to be used as all the stator segments, despite the requirement of a 90° electrical phase difference between phases and a tooth offset of 180° electrical within each phase.

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“…In order to achieve the requirement of a high torque at a low machine size, various high torque density PM machines have been proposed at present, in which a permanent magnet vernier machine (PMVM) as a relatively new machine topology has attracted wide attention because of the characteristics of a simple structure and high torque density [7][8][9][10][11][12][13][14]. In the high torque machine family, PMVM is considered to be a good potential candidate for the field of direct-drive [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Design, Analysis, and Optimization of Permanent Magnet Vernier Machines Considering Rotor Losses

2022

Energies

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The purpose of this paper is the design, analysis, and optimization of a new structure of a permanent magnet vernier machine (PMVM) with a high torque density and low rotor losses. First, the modulation principle and topology of this PMVM is introduced. Then, its average torque and rotor loss are enhanced and reduced by optimizing the flux modulation poles distribution. For the sake of further reducing the rotor losses on the premise of maintaining the torque density, the contribution of the air gap flux density harmonics to the rotor loss is analyzed. Then, a new topological structure of a rotor with a flux barrier is introduced to reduce the rotor losses due to the decrease of each harmful harmonic. Through the analysis of the structure of the PMVM with the flux barrier, the influence of the parameters on the performance is built. After that, a multi-objective optimization algorithm is used to optimize the PMVM so as to obtain the optimal performance. Moreover, the electromagnetic performance comparison between the newly proposed machine and the original one is presented to indicate that lower rotor losses can be obtained by the proposed machine when the torque is ensured. Finally, a prototype of proposed PMVM is built and further tested to verify the validities of the theoretical and finite-element analyses.

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Development and Testing of a Novel Cylindrical Permanent Magnet Linear Generator

Cited by 5 publications

References 29 publications

Development and Wave Tank Demonstration of a Fully Controlled Permanent Magnet Drive for a Heaving Wave Energy Converter

Development and Wave Tank Demonstration of a Fully Controlled Permanent Magnet Drive for a Heaving Wave Energy Converter

Manufacturing Challenges of a Modular Transverse Flux Alternator for Aerospace

Design, Analysis, and Optimization of Permanent Magnet Vernier Machines Considering Rotor Losses

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