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

Freeman, E.M.; Smith, Brandon

doi:10.1049/piee.1970.0360

Cited by 18 publications

(5 citation statements)

References 2 publications

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“…In a similar work, Williamson [12] ends up defining the so-called layer theory. Similarly, in a series of works [13][14][15][16] Freeman and others develop models that focus on field impedance and the so-called transfer matrices, gradually moving from rectangular to cylindrical coordinates.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic layer model theory applied to synchronous machine analysis

Alvarenga¹,

Alves²,

Paula³

et al. 2020

IET Electric Power Applications

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This study demonstrates the application of layer model theory to the analysis of synchronous machines. The derivation of the model from Maxwell's equations is briefly described. With the use of steady-state equations and terminal operation information, a methodology is established, and the synchronous machine operation is modelled. Two case examples are then analysed. It is shown that the layer model methodology can be applied to synchronous machines with promising results.

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Section: Introductionmentioning

confidence: 99%

Anisotropic layer model theory applied to synchronous machine analysis

Alvarenga¹,

Alves²,

Paula³

et al. 2020

IET Electric Power Applications

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“…The layer theory approach has been mainly used for the analysis of linear, tubular linear and helical motion induction motors as given in [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Double and Single Sided Induction Heating Systems by Layer Theory Approach

Qaseer¹

2010

JEMAA

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The iterative layer theory approach is applied to the analysis of double sided and single sided induction heating systems for continuous heating of thin metal strips. The excitation is transverse to the direction of strip motion and can be three phase or single phase. Nonmagnetic as well as ferromagnetic strips are employed. The important system parameters, namely, strip resistance, reactance, induced power and electromagnetic force are introduced. Accuracy of the method is verified with measurement of practical induction heating system together with comparison to numerical and analytical methods

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“…Typical examples include core loss in circular conductors, rotating magnetic fields in induction or hysteresis machines, and travelling-wave fields in liquid metal pumps or linear induction motors. Wood and Concordia (1960) have derived coefficients to include the effects of curvature in rotating machines; Freeman and Smith (1970) have solved the field equations for a cylindrical induction device with circumferential exciting currents. In general such methods neglect hysteresis effects, and, for the linear treatment employed, solutions are derived by the use of Bessel or related functions of complex argument which, in general, are not tabulated although digital methods of solution are available (Lewis et a1 1971).…”

Section: Introductionmentioning

confidence: 99%

Losses in cylindrical ferromagnetic cores including hysteresis and eddy-current effects

O'Kelly¹

1975

J. Phys. D: Appl. Phys.

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Cylindrical cores of ferromagnetic material with steady-state sinusoidal excitation in either a circumferential or an axial direction are defined in terms of an equivalent orthogonal coordinate system thus facilitating the computation of flux penetration and losses in such configurations by a multi-layer theory. By neglecting all harmonic components in the field quantities and assuming an elliptical magnetization B/H loop, both hysteresis and eddy-current effects are included in the treatment. The concept can be extended to cores with nonlinear magnetization characteristics, and examples are given for solid cylindrical and annular cores.

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

Cited by 18 publications

References 2 publications

Anisotropic layer model theory applied to synchronous machine analysis

Anisotropic layer model theory applied to synchronous machine analysis

Analysis of Double and Single Sided Induction Heating Systems by Layer Theory Approach

Losses in cylindrical ferromagnetic cores including hysteresis and eddy-current effects

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