Classification of symmetrical non-overlapping three-phase windings

Germishuizen, Johannes; Kamper, Maarten J.

doi:10.1109/icelmach.2010.5608096

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…Machine dimensions were calculated using a lumped analytic model as described by Stander et al (2014). It's a radial flux synchronous design fitted with a non-overlapping copper winding (Germishuizen and Kamper 2010). This winding is coupled to a grid via a power electronic converter which alters (i.e.…”

Section: Physical Modelsmentioning

confidence: 99%

Structural mass reduction by integrating active material in direct drive generator design

Stander

Venter

Kamper

2015

Struct Multidisc Optim

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Permanent magnet synchronous generator technology is known for its low power to mass ratio. Its heavy structural design results from the need to ensure a small air-gap at a large diameter between stator and rotor parts. Numerous options for lowering structural mass are considered. In this paper, an overall mass reduction strategy which entails the integration of the magnetically active parts with the support structure are presented. Two three megawatt generator designs, one with a single bearing and the other with double bearing lay-up, are considered. These models comprise three-dimensional elements, isotropic and orthotropic materials, linear static extreme hub loads, and magnetic stresses. Shape and size optimisations are applied in calculation of structural mass saving incurred from structural integration and the altering of rotor and stator yoke thicknesses. The results show that total generator mass reduction is possible through the integration of the active material.

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Section: Physical Modelsmentioning

confidence: 99%

Structural mass reduction by integrating active material in direct drive generator design

Stander

Venter

Kamper

2015

Struct Multidisc Optim

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“…The SG machine (SSPMG stator) calculation for a given capacity is partly based on work carried out by Salminen. Unlike in most PMSG designs, a non‐overlapping, single‐ layer, regular distributed and integral slot ( q < 0.5) wound copper winding is used. A winding slot fill factor of 0.6 is specified (rectangular conductors), and the slot–pole combination selection involves a low cogging torque design.…”

Section: Analytic Modellingmentioning

confidence: 99%

Analytic modelling and optimization of slip synchronous permanent magnet wind turbine generator topologies

2014

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The modular slip‐synchronous permanent magnet generator (SSPMG) is viewed as an induction‐synchronous machine pair that is electromagnetically decoupled by a free‐rotating rotor that in turn houses two different sets of permanent magnets. This machine pair combines the advantages of both conventional induction and permanent magnet synchronous machines. It therefore has the potential to realize a new path in reliable, robust and cost‐effective wind turbine drivetrains. However, which electromagnetic SSPMG topology is best and how does it compare with conventional drivetrain designs for various capacities? To date, the most published SSPMG advances are specific to winding design, torque quality and performance optimization in the small capacity range. This paper presents optimized analytic electrical designs of modular, radially and axially separable, radial flux SSPMG topologies of capacities ranging from 100 kW to 5 MW. Designs are based on lumped analytic models and are optimized for minimum specific active mass (mass/torque). A rated efficiency of 95 % and an inductive power factor of 0.95 are applied to all designs. The analytic models are validated with transient two‐dimensional finite element analysis results. The best SSPMG topologies are determined and compared with conventional drivetrain designs. The axially separable topology seems to be the best SSPMG design. Copyright © 2014 John Wiley & Sons, Ltd.

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“…This is mainly due to the fact that, during the first seven decades of the 20th century, researchers were focused only on DC machines and single-phase, 2-phase and 3-phase AC machines. Nowadays, the interest is also directed towards multiphase machines, particularly with 5, 6 and 7-phases [21,22,[25][26][27].…”

Section: Introductionmentioning

confidence: 99%