Journal ArticleDOI
Effective resistance to alternating currents of multilayer windings
Edward Bennett,Sidney C. Larson +1 more
TLDR
In this article, a multilayer winding carrying an alternating current, such as the windings illustrated in figures 1, 2, and 3, each layer of copper lies in the alternating magnetic field set up by the current in all the other layers.Abstract:
IN any multilayer winding carrying an alternating current, such as the windings illustrated in figures 1, 2, and 3, each layer of copper lies in the alternating magnetic field set up by the current in all the other layers. Eddy currents are set up in each layer in a direction to partly neutralize the magnetic intensities in the interior of the copper wire in each layer. As a result of the eddy-current losses in the copper, the effective resistance of the winding to the alternating current it carries may be many times its resistance to continuous currents.read more
Citations
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Journal ArticleDOI
Thermal Performance Modeling of Foil Conductor Concentrated Windings in Electric Machines
TL;DR: In this paper, the authors present a comprehensive model for evaluating the thermal performance of foil windings, including loss modeling and temperature rise prediction in realistic designs, along with experimental results that compare the ac losses and temperature distribution under identical steady state operating conditions with a prototype round conductor coil and foil conductor coil.
Proceedings ArticleDOI
Eddy-Current Losses evaluation in hairpin wound motor fed by PWM Inverter
TL;DR: This paper presents different approaches proposed to evaluate eddy-current losses in hairpin wound motor fed by pulse width modulated inverter, underlining strengths and weaknesses of everyone and applying them, as test-case, to a 200kW induction motor designed for a premium electric vehicle.
Hard-Switching and Soft-Switching Two-Switch Flyback PWM DC-DC Converters and Winding Loss due to Harmonics in High-Frequency Transformers
Murthy Bellur,S Dakshina +1 more
TL;DR: Bellur et al. as mentioned in this paper proposed a two-switch flyback PWM DC-DC converter for continuous conduction mode (CCM) and discontinuous conduction modes (DCM).
Journal ArticleDOI
Modelling and experimental demonstration of a litz coil-based high-temperature induction heating system for melting application
TL;DR: In this article, an analytical and numerical modeling and experimental demonstration of a litz wire-based induction heating system suitable for high-temperature application such as melting is presented. But, the limitation of litz wires is temperature withstanding capacity of the strand insulation material as a result of which it is rarely used in high temperature applications (>700°C).
References
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Journal ArticleDOI
Eddy Currents in Large Slot-Wound Conductors
TL;DR: In this article, the authors discuss the more important causes of eddy currents in heavy conductors carrying alternating currents and surrounded on three sides by iron, and propose a method to identify the most important causes.
Journal ArticleDOI
Eddy Current Losses in Armature Conductors
TL;DR: In this paper, an extension to the author's paper in Vo. XXXIX Pages 997 to 1047 on Eddy Current Losses in Armature Conductors is presented. And in this extension, additional formulas are given for the cases where transposed coils are used and also methods given for quickly estimating the increased loss due to eddy currents.
Journal ArticleDOI
Heat Losses in Stranded Armature Conductors
TL;DR: In this article, the authors extended the method of complex hyperbolic functions to the solution of the problem of heat losses in stranded conductors embedded in rectangular slots, where the insulation between the strands was assumed to have no appreciable thickness.