Proceedings ArticleDOI
A Novel 24-Slots/10-Poles Winding Topology for Electric Machines
Gurakuq Dajaku,Dieter Gerling +1 more
- pp 65-70
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TLDR
In this paper, a new and high efficiency method is presented to reduce simultaneously the sub-and high MMF harmonics of these winding types, based on doubling the number of stator slots, using two identical winding systems connected in series and shifted to each other.Abstract:
The fractional slots tooth concentrated windings are characterized with high space MMF harmonics which results to undesirable effects on electric machine, such as localised core saturation, eddy current loss in the rotor and noise and vibration. A new and high efficiency method is presented in this paper to reduce simultaneously the sub- and high MMF harmonics of these winding types. The method is based on doubling the number of stator slots, using two identical winding systems connected in series and shifted to each other for a specific angle, using stator core with different tooth width and using different turns per coil for the neighbouring phase coils. With the proposed technique the unwanted sub- and high winding MMF harmonics can be reduced or completely canceled.read more
Citations
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Journal ArticleDOI
Reduction of Low Space Harmonics for the Fractional Slot Concentrated Windings Using a Novel Stator Design
TL;DR: Using magnetic flux barriers in the stator yoke of electric machines with fractional slots, tooth-concentrated winding, it is possible to reduce or even to cancel some space harmonics of low order in the air-gap flux density resulting in lower rotor losses induced by the armature reaction field as mentioned in this paper.
Journal ArticleDOI
Generalized Approach of Stator Shifting in Interior Permanent-Magnet Machines Equipped With Fractional-Slot Concentrated Windings
TL;DR: It is shown that the stator shifting can reduce the loss-producing harmonics on the rotor as well as help the flux weakening performance of the fractional-slot concentrated winding designs.
Journal ArticleDOI
Fractional-Slot Permanent Magnet Brushless Machines with Low Space Harmonic Contents
TL;DR: The salient feature of the proposed designs is elimination and/or reduction of undesirable space harmonics which result from the existing fractional-slot per phase per pole permanent magnet machines with concentric windings.
Journal ArticleDOI
Six-Phase Fractional-Slot-per-Pole-per-Phase Permanent-Magnet Machines With Low Space Harmonics for Electric Vehicle Application
TL;DR: In this article, a six-phase PM machine with 18 slots and 8 poles was designed to improve power/torque density and efficiency with a reduction in eddy-current losses in the rotor permanent magnets and copper losses in end windings.
Proceedings ArticleDOI
Low costs and high-efficiency electric machines
Gurakuq Dajaku,Dieter Gerling +1 more
TL;DR: In this paper, a method for reducing or complete canceling some space harmonics of low order in the air-gap flux density of electric machines with fractional slots, tooth-concentrated winding using magnetic flux barriers in the stator teeth region.
References
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Proceedings ArticleDOI
Winding factors and Joule losses of permanent magnet machines with concentrated windings
F. Magnussen,Chandur Sadarangani +1 more
TL;DR: In this article, the authors describe methods for designing high performance permanent magnet machines with concentrated windings, including both single and double-layer configurations of concentric windings and verify their theory using FEM analysis.
Journal ArticleDOI
Comparison of PM brushless motors, having either all teeth or alternate teeth wound
TL;DR: In this paper, the electromagnetic performance of three-phase permanent magnet brushless motors in which the slot and pole numbers are similar and either all the teeth or only alternate teeth carry a concentrated coil is compared.
Proceedings ArticleDOI
Three phase tooth-concentrated multiple-layer fractional windings with low space harmonic content
TL;DR: In this article, the possibility of obtaining lower space harmonic content for the fractional-slot, tooth-concentrated windings by multiplying the number of coils, leading to a bigger number of layers in the armature slots is presented.
Journal ArticleDOI
A study on eddy-current losses in rotors of surface permanent magnet synchronous machines
TL;DR: In this paper, the authors investigated the Eddy current (EC) losses in the rotors of surface permanent-magnet (PM) synchronous machines, which have concentrated armature windings.
Patent
Dynamo-electric machine
TL;DR: In this article, a dynamo-electric machine is composed of a stator, formed by winding armature coils around stator core teeth, and a rotor, formed, by arranging permanent magnets inside a rotor core having magnetic recesses and protrusions.
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