Winding layers and slot/pole combination in fractional slot/pole PMSM&amp;#x2014;Effects on motor performance

Gao, Jian; Yu, Yanan; Huang, Shoudao

doi:10.1109/icems.2009.5382699

Cited by 14 publications

(12 citation statements)

References 4 publications

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“…Concentrated windings (tooth-wound coils) offer lower motor length for the same core length and lower copper losses. However, due to the large MMF harmonic content they can produce a large amount of parasitic losses at high speeds and high electrical frequencies [9,10]. Due to the constraints on envelope dimensions of the machine (stack length), a double-layer configuration is preferred to single-layer windings due to its shorter end windings, lower torque ripple, losses and more sinusoidal back-EMF [2,9].…”

Section: B Winding Configurationsmentioning

confidence: 99%

“…However, due to the large MMF harmonic content they can produce a large amount of parasitic losses at high speeds and high electrical frequencies [9,10]. Due to the constraints on envelope dimensions of the machine (stack length), a double-layer configuration is preferred to single-layer windings due to its shorter end windings, lower torque ripple, losses and more sinusoidal back-EMF [2,9]. Therefore, a comparative investigation on SMPM machines in terms of torque ripple, cogging torque and THD of the back-EMF for both distributed and concentrated topologies with double layer winding configuration for all slot/pole combination are shown in the Table 3.…”

Section: B Winding Configurationsmentioning

confidence: 99%

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Trade-off analysis and design of a high power density PM machine for flooded industrial pump

Al-Timimy

Calzo

et al. 2016

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society

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Abstract-This paper presents the trade-off analysis and design of a high power-density machine for industrial pump applications. The developed permanent magnet synchronous machine drives an electric, oil flooded pump. Different slot/pole combination and winding configuration have been investigated in order to identify the optimal combination that satisfies the electromagnetic and thermal constraint while keeping the losses as small as possible. Several strategies such as the use of the Cobalt iron material for the stator core lamination and the adoption of Halbach array have been investigated in this work to improve the performance capabilities of the designed machine. The electromagnetic performances have been evaluated by using a finite element method. Thermal behaviour has been determined using a lumped parameter network. The outcome of the thermal analysis helped to identify the optimal cooling configurations. The final results are presented highlighting the achieved design targets.

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Section: B Winding Configurationsmentioning

confidence: 99%

Section: B Winding Configurationsmentioning

confidence: 99%

Trade-off analysis and design of a high power density PM machine for flooded industrial pump

Al-Timimy

Calzo

et al. 2016

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society

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“…The main disadvantage of the solid rotor induction machine is its low efficiency and high rotor losses [8]. The main constraints of the cage type IM are its limited overload capability, its complex rotor construction especially for the dimensions discussed here, its requirement for small air gap and poor power factor [9].…”

Section: Electrical Motor Selectionmentioning

confidence: 99%

“…Therefore, 8p/ 9s SMPM machine with double layer (concentrated) winding is considered for the rest of this work. It is well known [12,13] that such slot/pole combination presents high rotor losses due to the harmonic-rich components for the armature reaction field. This indicates a topology whose performance is very sensitive to the air gap thickness dimension and attention must therefore be given to this aspect [12].…”

Section: Electrical Motor Selectionmentioning

confidence: 99%

“…Therefore, for the SMPM, different slot/pole combinations and winding configurations have been investigated for the specific application to satisfy the project requirements. Among the other slot/pole combinations, 8p/9s machine presents lower torque ripple, cogging torque, shorter endwindings which contribute to lower copper losses [12] and higher efficiency and higher torque density. Therefore, 8p/ 9s SMPM machine with double layer (concentrated) winding is considered for the rest of this work.…”

Section: Electrical Motor Selectionmentioning

confidence: 99%

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Design and optimization of a high power density machine for flooded industrial pump

Al-Timimy¹,

Degano²,

Giangrande³

et al. 2016

2016 XXII International Conference on Electrical Machines (ICEM)

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk Φ Abstract --This paper presents the design optimization procedure of a high power-density, permanent magnet synchronous machine for industrial pump applications. The designed machine drives an electric, oil flooded pump. In order to achieve higher torque-density, a fractional slot machine (8 poles, 9 slots) with double layer (concentrated) winding has been selected after a preliminary trade-off study, which considered several slot/pole combinations and winding configurations. The developed machine provides low torque ripple and short end windings, which contribute to lower axial length and higher efficiency. The electromagnetic performances have been evaluated by using finite element method and the lamination geometry has been optimized through a genetic. The final results are presented highlighting the achieved design targets.Index Terms-PMSM, high power density machine, finite element method, Genetic Algorithm (GA) optimization.

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Torque optimization strategy for outer rotor permanent magnet brushless DC motor based on metamodel and CRITIC–TOPSIS method

Ye,

Zeng,

Sun

et al. 2024

Electr Eng

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A metamodel-based torque optimization strategy is proposed for the efficient design and electromagnetic performance optimization of outer rotor permanent magnet brushless DC motors (ORPMBLDCM), which is based on the dimensionality reduction and generalization principles in statistical modeling theory. The strategy combines Criteria Importance through Intercrieria Correlation and Technology for Order Preference by Similarity to an Ideal Solution (CRITIC-TOPSIS) theory. A parameterized two-dimensional finite element calculation model is established using a 10-pole 12-slot ORPMBLDCM as an example. The optimization objectives are set to be the low cogging torque, low torque ripple, and high average electromagnetic torque. The actual model is approximated using coefficient of prognosis and the constructed optimal prediction metamodel, based on variance-based sensitivity analysis. Multi-objective evolutionary algorithms are used to optimize the objectives and obtain the Pareto optimal solution set. Finally, the CRITIC-TOPSIS method is used to globally rank the feasible solution set and determine the optimal structural dimension parameters. The results of the finite element analysis demonstrate a 77.9% reduction in cogging torque, a 18.5% improvement in average electromagnetic torque, and a 14.5% reduction in torque ripple. The effectiveness of torque optimization strategy using metamodel and CRITIC-TOPSIS method in improving the performance of ORPMBLDCM has been validated. The presented torque optimization strategy can guide the design of brushless DC motors.

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Winding layers and slot/pole combination in fractional slot/pole PMSM—Effects on motor performance

Cited by 14 publications

References 4 publications

Trade-off analysis and design of a high power density PM machine for flooded industrial pump

Trade-off analysis and design of a high power density PM machine for flooded industrial pump

Design and optimization of a high power density machine for flooded industrial pump

Torque optimization strategy for outer rotor permanent magnet brushless DC motor based on metamodel and CRITIC–TOPSIS method

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