Improved analytical modeling of conductive losses in gapped high-frequency inductors

Wallmeier, P.; Fröhleke, N.; Grotstollen, H.

doi:10.1109/ias.1998.730254

Cited by 26 publications

(43 citation statements)

References 9 publications

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“…A number of analytical methods exist to predict AC winding losses in round and rectangular conductors, [17]- [20], and in the presence of an air-gap, [5]. Extended methods able to cater for arbitrary current waveforms are reported in [20], [21].…”

Section: Winding Design Studymentioning

confidence: 99%

Additive manufacturing of shaped profile windings for minimal AC loss in gapped inductors

Simpson

Mellor

2017

2017 IEEE International Electric Machines and Drives Conference (IEMDC)

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Section: Winding Design Studymentioning

confidence: 99%

Additive manufacturing of shaped profile windings for minimal AC loss in gapped inductors

Simpson

Mellor

2017

2017 IEEE International Electric Machines and Drives Conference (IEMDC)

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“…Many references have reported the investigation of methods for copper loss reduction with round strands. Less attention has been paid to alternating loss reduction in winding with rectangular shape of conductors [14][15][16]. The value of the filling factor k c in the analysed stator segment with the round conductors as in Figure 5 is 40%.…”

Section: Finite Element Modelsmentioning

confidence: 99%

Analysis of the proximity and skin effects on copper loss in a stator core

Młot¹,

Korkosz²,

Grodzki³

et al. 2014

Archives of Electrical Engineering

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Accurate prediction of power loss distribution within an electrical device is highly desirable as it allows thermal behavior to be evaluated at the early design stage. Three-dimensional (3-D) and two-dimensional (2-D) finite element analysis (FEA) is applied to calculate dc and ac copper losses in the armature winding at high-frequency sinusoidal currents. The main goal of this paper is showing the end-winding effect on copper losses. Copper losses at high frequency are dominated by the skin and proximity effects. A time-varying current has a tendency to concentrate near the surfaces of conductors, and if the frequency is very high, the current is restricted to a very thin layer near the conductor surface. This phenomenon of nonuniform distribution of time-varying currents in conductors is known as the skin effect. The term proximity effect refers to the influence of alternating current in one conductor on the current distribution in another, nearby conductor. To evaluate the ac copper loss within the analyzed machine a simplified approach is adopted using one segment of stator core. To demonstrate an enhanced copper loss due to ac operation, the dc and ac resistances are calculated. The resistances ratio ac to dc is strongly dependent on frequency, temperature, shape of slot and size of slot opening.

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“…Therefore F R in this case is much higher than the one calculated by Dowell's equation. How the fringing field affects the high frequency winding loss and how to configure the windings to minimize the effect of the fringing field of the air gap have been investigated recently in [44]- [45]. The PCB windings are kept far away from the airgap in order to minimize the fringing effect in this work.…”

Section: B Winding Lossmentioning

confidence: 99%

Analysis and Design of Fully Integrated Planar Magnetics for Primary–Parallel Isolated Boost Converter

Ouyang

Sen

Thomsen

et al. 2013

IEEE Trans. Ind. Electron.

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Improved analytical modeling of conductive losses in gapped high-frequency inductors

Cited by 26 publications

References 9 publications

Additive manufacturing of shaped profile windings for minimal AC loss in gapped inductors

Additive manufacturing of shaped profile windings for minimal AC loss in gapped inductors

Analysis of the proximity and skin effects on copper loss in a stator core

Analysis and Design of Fully Integrated Planar Magnetics for Primary–Parallel Isolated Boost Converter

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