Eddy Currents in Solid Rotor Under Spatially Intermittent Feeding of the Stator Winding

Erd, Nicolas; Binder, A.

doi:10.1109/icelmach.2018.8507010

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…0 and r ! ∞), whereas the parameter ϑ n k , (10), determines the penetration into the respective conductive region. Again, the time order that is effective in region n must be used.…”

Section: Analytical Electromagnetic Field Modelmentioning

confidence: 99%

“…This prevents the occurrence of sub-harmonics with ν < p and wave lengths λ ν > 2τ p , which more easily reach the cold rotor and build up a larger magnetic flux, inducing eddy currents. 10 The damper loss strongly depends on the thickness of the cryostat wall d cryostat wall for two reasons:…”

Section: Eddy Current Loss In the Damper Screen And Cryostat Wallmentioning

confidence: 99%

“…In addition, fractional slot windings are studied, where the denominator of q is restricted to 2. This prevents the occurrence of sub‐harmonics with ν < p and wave lengths λ ν > 2 τ p , which more easily reach the cold rotor and build up a larger magnetic flux, inducing eddy currents 10 …”

Section: Parameter Study Of Damper Designsmentioning

confidence: 99%

See 2 more Smart Citations

Eddy current loss estimation for direct drive wind turbine generators with superconducting excitation winding by numerical and analytical models

Köster

Binder

2022

Int J Numerical Modelling

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Direct drive wind turbine generators with superconducting excitation winding are studied with focus on the electromagnetic damper design. A semianalytical eddy current model is built for parametric design studies based on a vector potential approach. The considered generators employ open stator slots and exhibit strong saturation effects, so that an analytical expression for the source terms is not adequate. Whilst the field equations are solved analytically, an equivalent current loading, accounting for slotting effects and saturation, is obtained by magnetostatic models applying the 2D finite element method (FEM). The proposed framework for the extraction of the current loading is universal and may also be applied to other machine types (e.g., permanent magnet synchronous machines, [PMSM]). In relation to transient FEM models, a considerable time-saving can be achieved, which is particularly beneficial in case of large models, for example, in case of fractional slot windings or intermittent feeding schemes. The eddy current loss in warm and cold rotor parts in a direct drive generator in the 7 MW power class are computed with the semi-analytical and transient 2D FEM models under variation of the damper geometry and the stator winding configuration. Minimum damper dimensions as well as constraints regarding applicable stator windings are derived.

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“…0 and r ! ∞), whereas the parameter ϑ n k , (10), determines the penetration into the respective conductive region. Again, the time order that is effective in region n must be used.…”

Section: Analytical Electromagnetic Field Modelmentioning

confidence: 99%

Section: Eddy Current Loss In the Damper Screen And Cryostat Wallmentioning

confidence: 99%

See 1 more Smart Citation

Eddy current loss estimation for direct drive wind turbine generators with superconducting excitation winding by numerical and analytical models

Köster

Binder

2022

Int J Numerical Modelling

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Optimale Auslegung von getriebelosen, permanentmagneterregten Windgeneratoren mit Zahnspulenwicklung und massivem Rotorjoch

Erd

Binder

2020

Elektrotech. Inftech.

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ZusammenfassungGetriebelose Windgeneratoren mit Zahnspulen und massivem Rotorjoch sowie der Möglichkeit zum Weiterbetrieb bei teilweisem Umrichterausfall stellen eine besondere Herausforderung in der Auslegung dar. Zunächst wird untersucht, welche Zahnspulenwicklungen im Hinblick auf die zulässigen Rotorverluste geeignet sind. Nachdem entsprechende Wicklungsvarianten gefunden sind, wird die Maschinengeometrie optimiert. Dabei wird das Optimierungspotenzial, welches in den kurzen Wickelköpfen der Zahnspulenmaschine liegt, berücksichtigt. Nach der Optimierung erfolgt eine Nachrechnung der Verlustbilanz und eine Auswertung der magnetischen Geräuschanregung mithilfe von transienten, nichtlinearen Finite-Elemente-Simulationen.

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Design and Manufacturing of a High Torque PMSM with Tooth-Coil Winding and Solid Rotor Yoke

Erd

Binder

2021

2021 11th International Electric Drives Production Conference (EDPC)

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Eddy Currents in Solid Rotor Under Spatially Intermittent Feeding of the Stator Winding

Cited by 8 publications

References 3 publications

Eddy current loss estimation for direct drive wind turbine generators with superconducting excitation winding by numerical and analytical models

Eddy current loss estimation for direct drive wind turbine generators with superconducting excitation winding by numerical and analytical models

Optimale Auslegung von getriebelosen, permanentmagneterregten Windgeneratoren mit Zahnspulenwicklung und massivem Rotorjoch

Design and Manufacturing of a High Torque PMSM with Tooth-Coil Winding and Solid Rotor Yoke

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