Travelling waves in induction machines: input impedance and equivalent circuits

Freeman, E.M.

doi:10.1049/piee.1968.0310

Cited by 62 publications

(33 citation statements)

References 14 publications

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“…The iterative form of the equations, closely related to the 'transmission line' equations, 11 enables one to consider any number of regions in a problem. Frequently, the input impedance may be written down directly by inspection.…”

Section: Discussionmentioning

confidence: 99%

Surface-impedance method applied to multilayer cylindrical induction devices with circumferential exciting currents

Freeman

Smith

1970

Proc. Inst. Electr. Eng. UK

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Section: Discussionmentioning

confidence: 99%

Surface-impedance method applied to multilayer cylindrical induction devices with circumferential exciting currents

Freeman

Smith

1970

Proc. Inst. Electr. Eng. UK

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“…[BC27] = Q27c h2,0 Q27c h2,h7 Q27d h2,0 Q27d h2,h7 Q27e h2,n7 Q27 f h2,n7 The corresponding elements in (39) and (40) are defined in Appendix C. One can note that (37) consists of…”

Section: Solving Of Linear Systemmentioning

confidence: 99%

New Scientiﬁc Contribution on the 2-D Subdomain Technique in Cartesian Coordinates: Taking into Account of Iron Parts

Dubas

Boughrara

2017

MCA

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Abstract:The most significant assumptions in the subdomain technique (i.e., based on the formal resolution of Maxwell's equations applied in subdomain) is defined by: The iron parts (i.e., the teeth and the back-iron are considered to be infinitely permeable, i.e., µ iron → +∞, so that the saturation effect is neglected. In this paper, the authors present a new scientific contribution on improving of this method in two-dimensional (2-D) and in Cartesian coordinates by focusing on the consideration of iron. The subdomains connection is carried out in the two directions (i.e., x-and y-edges). For example, the improvement was performed by solving magnetostatic Maxwell's equations for an air-or iron-cored coil supplied by a direct current. To evaluate the efficacy of the proposed technique, the magnetic flux density distributions have been compared with those obtained by the 2-D finite-element analysis (FEA). The semi-analytical results are in quite satisfying agreement with those obtained by the 2-D FEA, considering both amplitude and waveform.

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“…1a. Subsequent work has included the introduction of multi-layer representations of the toothed structure [16], tractable approaches for the analysis of multiregion machines [16], [17], and capability as an analysis tool for linear electromechanical systems [18]- [20]. Williamson has extended the model to represent magnetic and electric anisotropy in three directions [19].…”

Section: A Metamaterials Mappingmentioning

confidence: 99%

“…An inverse process can be used to establish a slotted arrangement to realize desired composite properties, however the applicability of smoothing formulae requires that the wavelength of the traveling fields ( 2π k ) be significant compared to slot pitch [17]. This model realization can then be used as a starting point for further analysis and design refinement.…”

Section: A Conventional Periodic Slottingmentioning

confidence: 99%

Electric machines as metamaterials: Induction machine design using planar layer models

Magill

Krein

2011

2011 IEEE International Electric Machines &Amp; Drives Conference (IEMDC)

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This work develops accepted layer-based analysis techniques to support the preliminary stages of electric machine design. The approach pairs a simplified geometric model with an analytical solution for magnetic diffusion to make computations for optimization tractable. The flexibility of the method supports exploration of unusual material parameter combinations, and is illustrated through a three-layer composite system. Design tradeoffs associated with rotor material parameters are studied, and subsequent reduced-order system optimization is shown to act as a preliminary objective within electric machine realization. Emphasis is placed on induction machines.

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Travelling waves in induction machines: input impedance and equivalent circuits

Cited by 62 publications

References 14 publications

Surface-impedance method applied to multilayer cylindrical induction devices with circumferential exciting currents

Surface-impedance method applied to multilayer cylindrical induction devices with circumferential exciting currents

New Scientiﬁc Contribution on the 2-D Subdomain Technique in Cartesian Coordinates: Taking into Account of Iron Parts

Electric machines as metamaterials: Induction machine design using planar layer models

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