Rotor optimization for synchronous reluctance motors

Chen, Ken; Yu, Wenfei; Wen, Chuanxin

doi:10.30941/cestems.2019.00036

Cited by 7 publications

(4 citation statements)

References 10 publications

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“…On the other hand, high torque ripple and additional iron loss occur in the ALA-SynRMs [28], [29]. Although these types of machines are slightly more efficient than the TLAtype, TLA-SynRMs are superior to ALA-SynRMs in general since they have attractive features, such as stronger mechanical strength, better suitability to manufacture, easy to skew, cheaper production, and stronger mechanical strength [30], [31]. A TLA-SynRM has been analysed in this study due to these advantages.…”

Section: B Types Of Synrmmentioning

confidence: 99%

Design and Analysis of a Rotor for a 22 kW Transversally Laminated Anisotropic Synchronous Reluctance Motor

Ozdil

Uzun

2021

ELEKTRON ELEKTROTECH

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Substantial increase in energy consumption in all around the world has led to researchers to need to produce electrical machines with high energy efficiency since majority of energy has been consumed at industry, especially by electrical machines. Among electrical machines, the Synchronous Reluctance Machines (SynRMs) have been preferred to investigate in recent years due to lack of Induction Machines (IMs) in terms of efficiency and high price of the Permanent Magnet Synchronous Machines (PMSMs). In this study, the Finite Element Analysis (FEA) showing the effects of phase angle of current, number of flux barriers, starting diameter of flux barriers, and ribs on machine performance of 22 kW Transversally Laminated Anisotropic (TLA)-SynRM with distributed winding have been carried out in ANSYS Electronics. The design is based on creating a novel rotor considering these rotor parameters since the utilized SynRM consists of same stator with same sized 22 kW IM. The performance of the machine has been investigated through torque, torque ripple, efficiency, saliency, and power factor. Moreover, the effect of the phase angle of the current on the machine performance and the comparison of the 22 kW-SynRM with the same sized and powered IM and with a different SynRM have been carried out in this study. This study has concluded that although the novel SynRM has high torque ripple values, it is better than the IM due to lack of copper losses of rotor and the previously utilized SynRM considering their efficiency classes. The efficiency class of novel SynRM is IE4, whereas that for utilized IM and previously created SynRM are IE1 and IE3, respectively.

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Section: B Types Of Synrmmentioning

confidence: 99%

Design and Analysis of a Rotor for a 22 kW Transversally Laminated Anisotropic Synchronous Reluctance Motor

Ozdil

Uzun

2021

ELEKTRON ELEKTROTECH

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“…-Adoption of high strength electrical steel [24]: usually involves steels with lower magnetic properties; -Adoption of retaining sleeves [25]: it is problematic since it would require a material substantially stiffer than steel to decrease the radial deflection under inertial load; -Novel rotor constructions [26]: they need custom manufacturing process and custom spare parts; -Adopting properly rotor interconnecting end plates or interconnecting shaft (dovetails vs press fit) [27]: it is more effective for compact buried PM rotors; -Adoption of structural non-magnetic materials (epoxy resins, titanium, others) [25], [28], [29]; these are difficult to be interconnected with the rotor laminations and have an additional cost that has to be accurately evaluated; -Adoption of optimized structural ribs [1], [16], [30], [31]:…”

Section: Rotor Design Criteria For High-speed Synrelsmentioning

confidence: 99%

Adopting the Topology Optimization in the Design of High-Speed Synchronous Reluctance Motors for Electric Vehicles

Credo

Fabri

Villani

et al. 2020

IEEE Trans. on Ind. Applicat.

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This paper deals with the design of high-speed Synchronous Reluctance motors for electric vehicle applications. The need to enhance the power density and to lower the cost leads to research on high-speed motors with a reduced amount of rare earth. Pure Synchronous Reluctance motors potentially operate at high speed and exhibit a cost-effective rotor compared to PM and induction motors. Nevertheless, they present reduced performances in deep flux weakening operations, in particular when the so-called radial ribs are introduced to increase the mechanical robustness of the rotor. In this paper the introduction of the radial ribs and the related design challenges are investigated and discussed. The adoption of the topology optimization tool that is able to optimize the amount, the positioning and the sizing of suitable structural ribs is presented. A design flow integrating the Topology Optimization is presented. The approach leads to an original positioning of the radial ribs able to preserve the performance of the motor at high operating speed enhancing the mechanical integrity of the rotor.

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“…These types of electric motor can be categorized into (i) surface mounted Permanent Magnet Synchronous Motor (SPMSM), (ii) Interior Mounted Permanent Magnet Synchronous Motor (IPMSM), (iii) Permanent Magnet Assisted Synchronous Reluctance Motor (PMASynRM) [6]. Among these types of PMSM, the PMASynRM has attracted a huge number of investigators to study the characteristics [6][7][8][9], apply optimization processes [10][11][12][13], and perform enhancement for different applications such as electric vehicular systems [4,[14][15][16]. Therefore, a large number of studies are devoted to introducing new branches of structural design for PMSM [4,15,[17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

On the Optimal Selection of Flux Barrier Reconfiguration for a Five-Phase Permanent Magnet Assisted Synchronous Reluctance Machine for Low-Torque Ripple Application

2021

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This paper aims to investigate the reconfigurations of rotor flux barriers for a five-phase Permanent Magnet Assisted Synchronous Reluctance Machine (PMASynRM). To precisely study the performance of the proposed configurations, a conventional PMASynRM with double-layer flux barriers is included in the study. Since the novel rotor schemes consume the same amount of rare-earth magnets, steel sheet materials, and copper wire, resulting in no extra manufacturing costs, the optimal reconfiguration should be determined, providing developed electromagnetic characteristics. Thus, all the proposed models are designed and analyzed under the same condition. The Lumped Parameter Model (LPM) is exported to the Finite Element Method (FEM) for precise analysis to reach developed torque and lower values of torque ripple. Based on the FEM results the model presenting the lowest torque fluctuations is selected as the optimal model and dynamically investigated. According to the results, in comparison with the conventional model, the introduced rotor designs provide a much lower value of torque fluctuations with a desirable amount of electromagnetic torque and power. In addition, the optimal model presents high values of power factor and efficiency, making it a vital alternative for low-torque ripple high-speed operations with no extra cost to the implementation process.

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Rotor optimization for synchronous reluctance motors

Cited by 7 publications

References 10 publications

Design and Analysis of a Rotor for a 22 kW Transversally Laminated Anisotropic Synchronous Reluctance Motor

Design and Analysis of a Rotor for a 22 kW Transversally Laminated Anisotropic Synchronous Reluctance Motor

Adopting the Topology Optimization in the Design of High-Speed Synchronous Reluctance Motors for Electric Vehicles

On the Optimal Selection of Flux Barrier Reconfiguration for a Five-Phase Permanent Magnet Assisted Synchronous Reluctance Machine for Low-Torque Ripple Application

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