A novel multi-layer winding design method for Fractional-Slot Concentrated-Windings Permanent Magnet Machine

Qi, Li; Fan, Tie; Xu, Wen; Tai, Xue–Cheng; Li, Ye

doi:10.1109/itec-ap.2014.6940615

Cited by 3 publications

(4 citation statements)

References 13 publications

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“…Section 4 deals with the multi-layer windings in order to validate the calculations outlined in this article. Some specific windings in [15]- [17] have been used and compared with the results obtained by the developed method. Finally, the algorithm written in Matlab allowing the calculation of the winding factor is given in Appendix.…”

Section: Objective Of This Papermentioning

confidence: 99%

“…The multi-layer winding is obtained by a superposition of several double-layer windings. The example given in [15] is an 18-slots/16-poles fractionalslot concentrated-windings permanent-magnet machine. Three multi-layer winding designs are obtained using the proposed method.…”

Section: Windings Extracted In Qi Et Al [15]mentioning

confidence: 99%

“…The winding arrangements are shown in Figure 9, viz., i) a double layer, ii) two four-layer windings (i.e., Type1 and Type2), and ii) a six-layer winding. The winding factor is calculated for each winding and the results are compared with those calculated by Qi et al [15] as shown in Figure 10. Except for some harmonics for which the negative direction is taken, the amplitude is the same between the compared results for each winding.…”

Section: Windings Extracted In Qi Et Al [15]mentioning

confidence: 99%

See 2 more Smart Citations

General Calculation of Winding Factor for Multi-Phase/-Layer Electrical Machines Irrespective of Poles Number

Ouamara¹,

Dubas²,

Randi³

et al. 2019

Acta Polytech

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In this paper, a method to calculate the winding factor by only considering stator parameters without the rotor ones is developed. This is interesting because it allows the separation of the stator and rotor design, unlike the existing methods in the literature. A general method based on the matrix representation of a winding is presented. This approach requires the knowledge of four parameters : i) slots number, ii) phases number, iii) layers number, and iv) single-phase spatial distribution. A new feature of the multi-layer windings is introduced, it is called false-zero windings, which is divided into two categories: i) α-windings (i.e., odd false-zero windings), and ii) β-windings (i.e., even false-zero windings). The windings having no false-zero are categorized as γ-windings. The calculations are applied for single and multi-phase/-layer windings. The results of the comparison are satisfactory. The code used for the calculation is given in Appendix.

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Section: Objective Of This Papermentioning

confidence: 99%

Section: Windings Extracted In Qi Et Al [15]mentioning

confidence: 99%

Section: Windings Extracted In Qi Et Al [15]mentioning

confidence: 99%

See 1 more Smart Citation

General Calculation of Winding Factor for Multi-Phase/-Layer Electrical Machines Irrespective of Poles Number

Ouamara¹,

Dubas²,

Randi³

et al. 2019

Acta Polytech

View full text Add to dashboard Cite

show abstract

“…In order to improve the machine's industrial production efficiency and the fault tolerance, the concentrated winding is adopted widely for its non-overlapping, short end-turns, high slot fill factor, and easy manufacture [1]- [3]. But the applying of traditional concentrated winding (TCW) results in high space harmonic of airgap MMF, which causes higher torque ripple, increased core loss, and reduced power factor [3]- [7].…”

Section: Introductionmentioning

confidence: 99%

Theory and Design of a Novel Multi-Layer Modular Modulation Winding

et al. 2021

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The modular winding structure can improve the production efficiency and facilitate the redundant design of electrical machine. Therefore, it is widely applied in industrial production. In this paper, one kind of multi-layer modular modulation winding (MLMMW) is proposed, in which each phase winding is composed of several sub-modules with adjustable turns. Based on MMF distribution principle, the design and optimization method of MLMMW with different slot/pole combinations are deduced in the form of mathematical expressions. By using the finite element method (FEM), electromagnetic parameters of the electrical machines with MLMMW are calculated and compared with that of electrical machines with traditional concentrated windings (TCW). The results show that the MLMMW can effectively reduce the MMF harmonics and improve the electromagnetic performance of electrical machine. The proposed winding structure is suitable for integral-slot and fractional-slot electrical machines with different slot/pole combinations, and it has good industrial application value.

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Coil- and phase-flux-linkage characteristics of dual excited permanent magnet machijnes equipped with different winding configurations

Awah¹,

Okoro²

2018

Nig. J. Tech.

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The flux-linkage characteristics of dual excited permanent magnet (PM) machines equipped with concentrated windings of single-and double-layer types is investigated in this paper. This includes precise comparison of the coil and phase flux-linkage waveforms of the machines having different stator and rotor pole topologies. It is observed that, the developed machine having double layer-wound configuration have unipolar coil flux linkage waveforms, although with a resultant bipolar phase flux-linkage waveforms on summation, while their corresponding single layer-wound counterparts are characterised by both bipolar coil and phase flux-linkage waveforms. Also, the opposite coils of the machines having single-layer windings as well as even rotor pole topology produces coil flux-linkage waveforms whose shape and magnitude are identical and same; thus, resulting to more phase harmonics unlike their counterparts that are equipped with odd rotor poles and single-layer winding configuration whose coil waveforms are shifted, thereby resulting to effective cancellation of harmonics in the resultant phase waveforms. In general, the single-layer-wound machines exhibit higher peak-to-peak and fundamental flux-linkage values than their doublelayer-wound equivalents.

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A novel multi-layer winding design method for Fractional-Slot Concentrated-Windings Permanent Magnet Machine

Cited by 3 publications

References 13 publications

General Calculation of Winding Factor for Multi-Phase/-Layer Electrical Machines Irrespective of Poles Number

General Calculation of Winding Factor for Multi-Phase/-Layer Electrical Machines Irrespective of Poles Number

Theory and Design of a Novel Multi-Layer Modular Modulation Winding

Coil- and phase-flux-linkage characteristics of dual excited permanent magnet machijnes equipped with different winding configurations

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