Structural Analysis and Characterization of Radial Flux PM Generators for Direct-Drive Wind Turbines

Jaen-Sola, Pablo; McDonald, Alasdair

doi:10.1049/cp.2014.0866

Cited by 6 publications

(13 citation statements)

References 3 publications

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“…γ is equal to , thus Mode 0 is by definition when γ = 1. Comparison of a disc sub-structure stiffness evaluated by FE and using equation (5) [3] With the cylinder and discs sub-structure stiffnesses calculated, the structure stiffness can be estimated by combining them in series, i.e.…”

Section: Hybrid Approachmentioning

confidence: 99%

“…In [3], Jaen-Sola developed a model capable of predicting the stiffness of a disc sub-structure by modifying Benham's model [6]. In [7], McDonald found the deflection of the arms and the deflection of the cylinder at the midpoint between arms using the forces acting on each sub-structure for Mode 0 deflection.…”

Section: Analytical Approachmentioning

confidence: 99%

“…The hybrid approach was presented by the authors in [3], where the stiffness of the components forming a disc rotor structure and the stiffness of the rotor itself were estimated obtaining satisfactory results. In this investigation, the stiffness of the disc stator structure and its components and the stiffness of the elements of an armed structure and the armed structure itself have been calculated.…”

Section: Modelling Structural Stiffness With a Hybrid Approachmentioning

confidence: 99%

“…The same approach that was used to find out the equation of the rotor in [3] was utilised in the case of the stator. As the stator discs are constrained in the same way as it was done with the rotor disc, Equation (5) was considered valid.…”

Section: Stator With Discs Stiffness Modelmentioning

confidence: 99%

“…For large direct-drive generators, the structural material dominates the total generator mass [2]. In [3], JaenSola and McDonald presented an electromagnetic model that can be used to estimate the magnetic stiffness and hence the generator structural stiffness. The authors coupled the said electromagnetic model with a parametric structural model, which was developed using finite element techniques.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A comparative study of methods for modelling the structural stiffness of generator components

Sola¹,

McDonald²

2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

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Direct-drive generators are low speed electrical machines requiring robust and large supporting structures designed to resist the significant loads present during assembly and operation. Generator structures have to be stiff, especially in the radial direction for radial-flux machines. This paper presents three different structural modelling approaches: finite element, analytical and hybrid (a combination of the results obtained from dimensional studies and finite element analyses). These are used along with models of electromagnetic active material, to parametrically calculate the minimum structural stiffness and mass of the components forming the machine.

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Section: Hybrid Approachmentioning

confidence: 99%

Section: Analytical Approachmentioning

confidence: 99%

Section: Modelling Structural Stiffness With a Hybrid Approachmentioning

confidence: 99%

Section: Stator With Discs Stiffness Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A comparative study of methods for modelling the structural stiffness of generator components

Sola¹,

McDonald²

2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

Self Cite

View full text Add to dashboard Cite

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Dynamic structural design of offshore direct-drive wind turbine electrical generators

2018

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Direct-drive permanent magnet generators for multi-MW wind turbines are low speed high torque electrical machines requiring large, heavy and robust structures to maintain the airgap clearance open and stable. The structural mass of radial-flux generators can be estimated at an early phase of the design process. Using distinct approaches, the integrity of a 3MW electrical machine structure has been addressed from a dynamic perspective by carrying out modal analyses with a view to minimize its mass. A versatile tool has also been developed to help the engineers with the dynamic design of generator disc structures. Conical structures have been analysed and compared with the baseline disc model obtaining very promising results. Potential improvements have been proposed for more ambitious structural designs.

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Lightweight design of direct-drive wind turbine electrical generators: A comparison between steel and composite material structures

2019

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Direct-drive generators for wind turbines are high torque, low speed machines which require a heavy robust structure to maintain the air-gap clearance open and stable. The mass of the structural material can be assessed at the early stages of the design process for radial-flux generators. By using low density materials, such as composites, the entire mass of the machine can be significantly reduced. A comparison between steel structures and structures made with composite materials working under the same loading conditions is made using small scale (100 kW) and large scale (3 MW) generator models. Potential improvements to the lightweight proposed structures are also suggested.

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Structural Analysis and Characterization of Radial Flux PM Generators for Direct-Drive Wind Turbines

Cited by 6 publications

References 3 publications

A comparative study of methods for modelling the structural stiffness of generator components

A comparative study of methods for modelling the structural stiffness of generator components

Dynamic structural design of offshore direct-drive wind turbine electrical generators

Lightweight design of direct-drive wind turbine electrical generators: A comparison between steel and composite material structures

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