Synthesis of High-Performance PM Motors with Concentrated Windings

Cros, J.; Viarouge, P.

doi:10.1109/mper.2002.4312124

Cited by 34 publications

(54 citation statements)

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“…The 1/2 spp is the closest to the integral-slot distributed windings in terms of performance (Cros and Viarouge, 2002). The 2/5 spp did not show an acceptable performance.…”

Section: Discussionmentioning

confidence: 89%

“…The 2/5 spp did not show an acceptable performance. There are many other slot/pole combinations that can support FSCW (Cros and Viarouge, 2002). It is recommended as future work to carefully examine these other combinations and determine if there is an optimum combination that can strike a better balance between performance and reducing cost.…”

Section: Discussionmentioning

confidence: 99%

“…This is due to the several advantages provided by this type of windings which include: shorter non-overlapping end turns (Figures 1 and 2 show example FSCW stators that were used in PM machines), higher efficiency, higher power density, higher slot fill factor, lower manufacturing cost, better flux-weakening capability resulting in wider constant power speed range, and fault-tolerance (Cros and Viarouge, 2002;Jack et al, 2000;EL-Refaie and Jahns, 2005;EL-Refaie et al, 2006;Mitcham et al, 2004). However, to the best of authors' knowledge, the tradeoffs involved in using this type of windings in an induction machine (IM) have not been addressed in literature.…”

Section: Introductionmentioning

confidence: 99%

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Induction machine performance with fractional‐slot concentrated windings

El-Refaie

Shah

2011

COMPEL

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Purpose -The purpose of the paper is to investigate the performance of induction machines with fractional-slot concentrated-windings. Design/methodology/approach -This paper examines induction machine performance with fractional-slot concentrated windings using the standard distributed lap windings as reference. Four designs are compared and various performance tradeoffs highlighted. The first machine has integral-slot distributed 2 slots/pole/phase lap winding and it serves as the reference winding. The second machine has a double-layer 1/2 slot/pole/phase winding, a workhorse for brushless DC machines. The third machine has double-layer 2/5 slot/pole/phase winding. Lastly, the fourth machine has single-layer 2/5 slot/pole/phase windings. The comparison includes torque-speed curves (including the effects of major space harmonic components), rotor bar losses, and ripple torque levels.Findings -Based on the analysis results presented here, the traditional distributed lap winding is proven to be superior to FSCW in terms of torque production and rotor bar losses for induction machine applications. The 1/2 spp shows some promising results in terms of torque production, in addition to significant reduction and simplification of end turns with lower number of coils albeit with more turns/coil (12 slots vs 48 slots). The penalty is the additional rotor bar losses due to the 2nd and 4th harmonic mmf components. The 2/5 spp is not promising for torque production and should be avoided. The transient simulation results that simultaneously take into account the effects of all space harmonics and magnetic saturation showed comparable trends compared to the harmonic analysis results. It has also been shown that FSCW tend to have higher torque ripple compared to distributed windings. Originality/value -To the best of the authors' knowledge, this paper for the first time attempts to quantitatively address the tradeoffs involved in using FSCW in induction machines.

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“…The 1/2 spp is the closest to the integral-slot distributed windings in terms of performance (Cros and Viarouge, 2002). The 2/5 spp did not show an acceptable performance.…”

Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Induction machine performance with fractional‐slot concentrated windings

El-Refaie

Shah

2011

COMPEL

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“…Furthermore, the end windings and axial build are shorter. Hence the volume of copper used in the end windings can be reduced in significant proportions and a significant reduction in Joule losses is achieved (Cros and Viarouge, 2002).…”

Section: Motor Designmentioning

confidence: 99%

Analysis of a fractional slot permanent magnet machine for a series hybrid truck

Kremers

Paulides

Motoasca

et al. 2012

COMPEL

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Purpose -The purpose of this paper is to discuss the performance of a proposed machine design for an in-wheel motor with the required torque-speed characteristic. Design/methodology/approach -Calculation of the winding factor of the machine with the star of slots theory is performed first. The field weakening capability of the machine is investigated and the operating speed range is determined. The tooth contour modeling method for calculating the performance of the machine with a limited number of elements is introduced. The method is used to construct two models of different complexity and the results obtained with the models are compared with the results obtained by finite element models. Findings -The 14 pole 12 slot in-wheel PMSM discussed in this paper is able to meet the stringent performance requirements. The results obtained with the tooth contour models show good agreement with the results obtained with finite element models despite the limited number of elements. Increasing the number of elements in the model allows for modeling of armature reaction and increases the accuracy of the model. Research limitations/implications -This work can be continued with investigating the possibilities to model the armature reaction more accurately. Originality/value -This paper proposes a modeling method which accurately describes the performance of a PMSM with limited number of elements. With this method, the calculation procedure can be easily used for optimization of the machine design.

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“…Among the others, the configuration that is mainly adopted nowadays is with fractional-slot winding (and in particular with non-overlapped coils [5]) that allows an intrinsic fault tolerant capability to be achieved. In large scale production, the absence of the position sensor implies a worthwhile cost reduction.…”

Section: Introductionmentioning

confidence: 99%

Predicted and experimental anisotropy of a dual three-phase interior permanent magnet motor for sensorless rotor position control

Barcaro

Faggion

Bolognani

2012

6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012)

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The interest for fractional-slot permanent magnet (PM) synchronous machines is more and more increasing in re cent years. Particularly attractive is the interior PM (IPM) machine that is characterized by a rotor anisotropy. Thanks to this feature, the IPM rotor position can be detected with out sensor also at zero speed, by means of techniques based on high-frequency signal injection. The aim of this paper is to investigate, using both finite element simulations and experimental tests, the sensorless position detection capability of an IPM dual three-phase machine equipped with two fractional-slot windings. These two windings are designed to be supplied by two separate converters, yielding an increase of the fault-tolerant capability of the machine

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Synthesis of High-Performance PM Motors with Concentrated Windings

Cited by 34 publications

References 0 publications

Induction machine performance with fractional‐slot concentrated windings

Induction machine performance with fractional‐slot concentrated windings

Analysis of a fractional slot permanent magnet machine for a series hybrid truck

Predicted and experimental anisotropy of a dual three-phase interior permanent magnet motor for sensorless rotor position control

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