Structural optimisation tools for iron cored permanent magnet generators for large direct drive wind turbines

Zavvos, A.; McDonald, Alasdair; Mueller, Markus

doi:10.1049/cp.2011.0231

Cited by 16 publications

(19 citation statements)

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“…This magnetic gear architecture shown in Fig.2 potentially offers a higher performance with a high torque density and a high reliability than mechanical gearboxes [6] and even more for high torque applications like in high wind turbine (of the order of a few MN.m and a few MW) with only magnetic part consideration [7]. However, no magneto-mechanical sizing has been done on this magnetic gear (with an approach similar than [8] for a wind turbine generator) and it seems to have weaknesses in terms of mechanical strength which are subjected to radial and tangential loads from the magnetic field. Indeed, ferromagnetic pole pieces (see Fig.…”

Section: Introductionmentioning

confidence: 99%

Supporting the Laminated Ferromagnetic Pole Pieces in a Magnetic Gear: A Structure Behaviour Analysis from a Multibody Model

Desvaux

Multon

Ahmed

et al. 2017

Multibody Mechatronic Systems

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This paper deals with the structure behaviour of a multi-bar system which maintains pole pieces in a magnetic gear. A simplified model of the system is proposed in order to be integrated in a multi-criteria global optimization for the sizing of a magnetic gear in wind power applications. For this purpose, the reduction of the computation time is taken into account. A geometry of the supporting bar is the defined and a Q bars structure is proposed. The study is based on a 1D model for each bar; variable radial and tangential magneto-mechanical pole pieces loads (generated by permanent magnets rings) are also considered. The resolution of the 6Q*6Q system permits to determine quickly the evolution of displacements for each bar. An example of a magnetic gear with 151 pole pieces (i.e. 3,9 MW wind turbine) is proposed.

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Section: Introductionmentioning

confidence: 99%

Supporting the Laminated Ferromagnetic Pole Pieces in a Magnetic Gear: A Structure Behaviour Analysis from a Multibody Model

Desvaux

Multon

Ahmed

et al. 2017

Multibody Mechatronic Systems

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“…It was decided to evaluate mechanical stresses using the Von Mises yield criterion, which takes the various stress tensor terms into account [14]. Revised deformation limits were proposed with respect to overall system dimensions in [15]. These limits were specifically adapted to the magnetic gears:…”

Section: ) Mechanical Constraintsmentioning

confidence: 99%

Design and optimization of magnetic gears with arrangement and mechanical constraints for wind turbine applications

Desvaux

Latimier

Multon

et al. 2016

2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER)

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This article focuses on the design and optimization of magnetic and mechanical (structural) parts of magnetic gears for wind turbine applications. In particular, this design takes into account the structural aspects of magnetic gears as well as the system's mechanical constraints (deformation and stress). Geometric parameters have been optimized in order to minimize the material costs for a 3.9 MW, 15 rpm wind turbine. This optimization strategy includes both magnetostatic and mechanical stationary finite element analyses. Optimization results underscore the necessity to take mechanical constraints into account, especially for the fixed ferromagnetic pole pieces.

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“…The direct-drive generator considered for this study is a low-speed radial flux permanent magnet generator of the interior rotor construction obtained from an optimisation study. 27 The rotor is a cylinder of disctype construction; stator is also a cylinder with double spider arrangement. Figure 1 provides an illustration of the rotor nacelle assembly for the direct-drive generator and constructional details (clearances).…”

Section: Direct-drive Generator Topologymentioning

confidence: 99%

A 5MW direct-drive generator for floating spar-buoy wind turbine: Development and analysis of a fully coupled Mechanical model

Sethuraman

Xing

Gao

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part A:

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This work forms the first of a two-part investigation aimed at identifying the challenges and opportunities of implementing a direct-drive generator for a spar-buoy type floating wind turbine. Preliminary specifications are presented for a fully coupled aero-hydro-servo-elastic model of a floating wind turbine with a 5 MW direct-drive generator. The drivetrain model uses a low-speed, high-torque radial flux permanent magnet generator supported by two main-shaft bearings. The mechanical properties of the drive-train, including the main dimensions, mass of major nacelle equipment and details for the hub/nacelle assembly are presented. The rationale behind the adjustments to the tower and platform properties and the motivation to selection of best arrangement that is appropriate for supporting the developed system is explained. A discussion on the development of the variable speed-variable pitch control system suitable for the directdrive system including modifications to avoid negative damping and blade-pitch instability are presented. Fully coupled simulations for the developed aero-hydro-servo elastic model were carried out in HAWC2 for the normal operating conditions of the wind turbine. The aerodynamic response of the model was verified and compared with that of a geared floating wind turbine system. Some initial results comparing the main shaft loads of the land-based and floating versions of the direct-drive wind turbine suggest satisfactory dynamic behaviour of the drive-train. The results prompt further research using a detailed drive-train model to verify the internal response, loading and durability of the components to assess their compatibility with a floating wind turbine system.

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Structural optimisation tools for iron cored permanent magnet generators for large direct drive wind turbines

Cited by 16 publications

References 0 publications

Supporting the Laminated Ferromagnetic Pole Pieces in a Magnetic Gear: A Structure Behaviour Analysis from a Multibody Model

Supporting the Laminated Ferromagnetic Pole Pieces in a Magnetic Gear: A Structure Behaviour Analysis from a Multibody Model

Design and optimization of magnetic gears with arrangement and mechanical constraints for wind turbine applications

A 5MW direct-drive generator for floating spar-buoy wind turbine: Development and analysis of a fully coupled Mechanical model

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