Torque Ripple Minimization for Bearingless Synchronous Reluctance Motor

Diao, Xiaoxu; Zhu, Huangqiu; Qin, Yuemei; Hua, Yizhou

doi:10.1109/tasc.2018.2798632

Cited by 27 publications

(14 citation statements)

References 13 publications

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“…It can be noted that the 36 slots/4 barriers per pole combination shows superior performance in terms of torque capability, whereas the 24 slots/2 barriers per pole is a poor choice; the remaining slots/barriers combinations perform similar to each other. These results are consistent with those presented in the literature: in fact, at low speed, high values of stator slots and rotor barriers are beneficial to the torque capability and to the torque ripple reduction for SyR machines [12,22].…”

Section: Average Torque-torque Ripple Optimisationsupporting

confidence: 92%

Design methodologies for the output power maximisation of synchronous reluctance machines

Palmieri

Cascella

Cupertino

2019

IET Electric Power Applications

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Synchronous reluctance (SyR) machines can constitute a promising alternative to permanent magnet machines for low-cost applications. The recent literature reports some guidelines for choosing the proper number and position of the rotor flux barriers capable of enhancing the electromagnetic performance in low-speed applications. However, as the rotational speed increases, the electromagnetic and structural mutual interactions become relevant; therefore, an optimal design requires a proper trade-off between torque production and stress reduction, which can be difficultly predicted analytically. This work proposes an approach based on optimisation algorithms in order to find 'non-conventional' geometries able to improve the power density: genetic algorithms coupled to magneto-static finite elements analysis and structural analytical models, are adopted to co-design SyR machines with different numbers of stator slots and rotor barriers subjected to the same thermal constraints. This study investigates two design procedures aimed at maximising the output power of SyR machines by increasing the rotational speed. Both procedures allow determining the power limits for a given volume of active parts and a fixed amount of admissible losses; moreover, the second procedure automatically finds also the rotational speed which maximises the output power.

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Section: Average Torque-torque Ripple Optimisationsupporting

confidence: 92%

Design methodologies for the output power maximisation of synchronous reluctance machines

Palmieri

Cascella

Cupertino

2019

IET Electric Power Applications

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“…Research shows that the increase in the number of air magnetic barrier layers promotes the increase in the salient pole ratio of the motor and the torque density. When the number of air magnetic barrier layers exceeds three, the torque ripple decreases [20]. For this reason, the secondary of the LSynRM proposed in this study adopts three layers of air magnetic barriers, as shown in Fig.…”

Section: Design and Optimisation Of Lsynrmmentioning

confidence: 99%

Investigation of linear synchronous reluctance motor for urban rail transit

Cao

et al. 2019

IET Electric Power Applications

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The long stator of linear synchronous reluctance motor (LSynRM) consists only of low-cost permeable material. Hence, LSynRM has a good application prospect in long-distance drive systems. What about the electromagnetic performance of LSynRM under the constraints of installation size of rail transit? What are the advantages of LSynRM compared with the existing linear induction motor (LIM)? Research is non-existent in academic circles. The purpose of this study is to compare LSynRM with LIM used in rail transit and give a comprehensive evaluation. First, a LIM used in Guangzhou Metro was analysed. Second, the working principle of LSynRM was analysed, and the selection principles of key parameters were determined. On this basis, the relevant parameters were optimized by using two-dimensional finite-element analysis (FEA) software. Then, the output characteristics of LIM and LSynRM were compared. The influence of ferrite on LSynRM was explored in view of the low power factor. The influence of winding end effect is explored through three-dimensional FEA. The thrust force and power factor of LSynRM are corrected and the model is adjusted. Finally, the system cost and energy consumption of the two motors based on Guangzhou Metro Line 4 were estimated and compared in detail.

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“…In [11], the electromagnetic characteristics of the BSynRM with the flux barriers rotor were analyzed. In [12], a new rotor structure with multilayer flux barrier of the BSRM is proposed to improve electromagnetic performances. According to [10][11][12], although the power factor and torque density of the BSynRM with the flux barriers rotor were improved, compared with the salient rotor, they were still lower than that of the rare earth permanent magnet motor.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Two Permanent-Magnet-Assisted Bearingless Synchronous Reluctance Motors with Different Rotor Structure

et al. 2021

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The traditional bearingless synchronous reluctance motor (BSynRM) with salient pole rotor has some drawbacks such as high suspension force ripple, low torque density and low power factor. To overcome the above shortcomings, the permanent-magnet-assisted bearingless synchronous reluctance motor (PMa-BSynRM) is proposed. In this paper, two types of PMa-BSynRM rotors with the same number of permanent magnets but different magnetic barrier structures are designed. A traditional BSynRM with a salient pole rotor is introduced, and the electromagnetic and vibration characteristics of the three BSynRM are analyzed and compared. Firstly, the rotor structures of the two PMa-BSynRMs are designed, and the operation principle of the BSynRM is introduced. Secondly, electromagnetic characteristics of the three motors are analyzed and compared in detail using FEA software. Thirdly, the vibration analysis of the three motors is carried out. Finally, the experimental prototype platforms are built. The FEA and experimental results verify that the designed PMa-BSynRM can improve the power factor and torque density of traditional BSynRMs, and the most superior BSynRM among the three is identified.

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Torque Ripple Minimization for Bearingless Synchronous Reluctance Motor

Cited by 27 publications

References 13 publications

Design methodologies for the output power maximisation of synchronous reluctance machines

Design methodologies for the output power maximisation of synchronous reluctance machines

Investigation of linear synchronous reluctance motor for urban rail transit

Design and Analysis of Two Permanent-Magnet-Assisted Bearingless Synchronous Reluctance Motors with Different Rotor Structure

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