The analysis of thick-cylinder induction machines

West, James C.; Hesmondhalgh, D.E.

doi:10.1049/pi-c.1962.0023

Cited by 18 publications

(4 citation statements)

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“…The corresponding curves from the simple analysis are shown for comparison on the figure as dashed curves. The short primary results were obtained by assuming that the air gap outside the primary region is given approximately by T~/ T [3]. 3D FEA results are also shown for the 4-pole short sta--tor case in Fig.…”

Section: Comparison Of the Silnple Approach With Finite Element Anmentioning

confidence: 99%

Comparison of the use of simple space transient and finite element analysis for linear induction motor calculation

1994

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Section: Comparison Of the Silnple Approach With Finite Element Anmentioning

confidence: 99%

Comparison of the use of simple space transient and finite element analysis for linear induction motor calculation

1994

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“…For example, the lifting force on a conducting sheet over the surface of a single-sided linear motor can be calculated (West and Hesmondhalgh 1962) provided the equations for the flux density b and the current density j at all points can be found. However, in most practical levitation systems the equations either cannot be formulated or are so formidable that solu-tions are virtually impracticable.…”

Section: Some Stable and Unstable Ac Induction Levitatorsmentioning

confidence: 99%

Electromagnetic suspension and levitation

Jayawant

1982

IEE Proc. A Phys. Sci. Meas. Instrum. Manage. Educ. Rev. UK

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The phenomenon of levitation has attracted attention from philosophers and scientists in the past. The recent advances, notably in power electronics and magnetic materials, have focused this attention within the last decade on the application of electromagnetic suspension and levitation techniques to advanced ground transportation. Regardless of the fact that there is, in effect, a separate technology involved for each electromagnetic method, the whole subject is given a blanket title of 'maglev'. There is also a very wide range of industrial applications to which magnetic suspension techniques could be profitably applied, particularly in the area of high-speed bearings to reduce noise and to eliminate friction, and yet only high-speed ground transportation has caught the imagination of the media. This review deals with the physics and engineering aspects of the four principal contenders for advanced ground transportation systems and describes the most up-to-date developments in Germany, Japan, USA and the UK in this field. This article also describes some of the very recent challenging developments in the application of electromagnetic suspension and levitation techniques to contactless bearings. A fairly comprehensive bibliography is given to enable the more interested reader to pursue the topic further in any one of the technologies dealt with in this review.

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“…= -; / . exp {-k(y + g)} expj(cot -kx) (4) Wy = --fa = -J s-L r ! -exp{-k(y+g)}expj(a)t-kx) (5) Since vector potential is continuous across the boundary, this gives…”

Section: Region 2 Assumed Nonconductingmentioning

confidence: 99%

“…I have used this reasoning in a previous discussion of the aligning force between two blocks of iron in a magnetic field. 4 If this argument is valid and stresses are always to be looked for on the surface of a cut made in the material, only Maxwell's stress tensor in free space enters into the discussion and 'internal' electromagnetic stress systems are seen to be devoid of meaning.…”

Section: Distribution Of Mechanical Forces In Magnetised Materialsmentioning

confidence: 99%