Evaluation of Rotor-End Factors in Solid-Rotor Induction Motors

Jagieła, Mariusz; Garbiec, Tomasz

doi:10.1109/tmag.2011.2167019

Cited by 20 publications

(17 citation statements)

References 22 publications

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“…The literatures reported on five different rotor end factors were raised by various authors, i.e., by R. L. Russel, D. O'Kelly, Gibbs, W. J, Yee, H and Fu Fengli [5]- [9]. There are also some works available that investigated the accuracy provided by these factors for various combinations of rotor lengths and stator pole-numbers [12]- [17].…”

Section: B Five Different Rotor End Factorsmentioning

confidence: 99%

“…In lots of the works, the Russel's end factor is recommended [10], [11], [13]- [16], but some suggest that the O'Kelly's end factor seems more accurate [12], [17]. So it is necessary to reexamine the appropriate choice of these factors.…”

Section: The Usage Of Rotor End Factorsmentioning

confidence: 99%

“…Generally, to consider the 3-D end effect of slitted solid rotor, many literatures approximately used the end factor of smooth solid rotor to modify the resistivity of rotor in 2-D FEA [10], [11]. However, with the simplified linear 3-D FEA of slitted solid rotor magnetic field in [12], Jagiela pointed out that the end factor of slitted solid rotor is different from the smooth ones. Nearly all the aforementioned end factors of smooth solid rotor are constant, independent of the slip frequency and rotor slit number, which may cause calculation error for slitted solid rotor.…”

Section: End Factor Of Slitted Solid Rotormentioning

confidence: 99%

“…6(a). In a similar way, by converting the eddy currents along the teeth wall to the rotor's circumferential surface, the expression of equivalent pole pitch of slitted rotor is presented as (12). The increase of the rotor's equivalent pole pitch is not that much as the above situation, since the penetration depth  increased.…”

Section: B Under Small Slip Conditionmentioning

confidence: 99%

“…There are some rotor end factors described in literatures [5][6][7][8][9]. In the 2-D FEA model, several literatures multiplied the rotor resistivity linearly by the rotor end factor to consider the end effect of rotor [2]- [4], [10][11][12][13][14][15][16][17]. However, the definition and the usage of rotor end factor should be explicit, which will be discussed in this paper.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Rotor end factors for 2-D FEA of induction motors with smooth or slitted solid rotor

Wang

Huang

Sun

et al. 2017

Trans. Electr. Mach. Syst.

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Modifying the equivalent rotor resistivity with rotor end factor in 2-dimension (2-D) finite element analysis (FEA) is an effective way to analyze the 3-dimension (3-D) solid rotor problems. For the smooth solid rotor, five different rotor end factors are discussed and compared with each other. It is theoretically clarified that the resistivity of rotor in 2-D FEA should be multiplied by the square of rotor end factors to take the 3-D end effect of solid rotor into account. For the slitted solid rotor, an improved rotor end factor is proposed based on the equivalent area algorithm of eddy currents in rotor, since the end factors of smooth solid rotor are not applicable. Finally, the timeharmonic finite element method (FEM) combined with the rotor end factor is applied to analyze the performance of solid rotor induction motor. The tested and computed results are in good agreement, which proves the effectiveness of rotor end factor for the simplication of 3-D solid rotor problems.

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Section: B Five Different Rotor End Factorsmentioning

confidence: 99%

Section: The Usage Of Rotor End Factorsmentioning

confidence: 99%

Section: End Factor Of Slitted Solid Rotormentioning

confidence: 99%

Section: B Under Small Slip Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Rotor end factors for 2-D FEA of induction motors with smooth or slitted solid rotor

Wang

Huang

Sun

et al. 2017

Trans. Electr. Mach. Syst.

View full text Add to dashboard Cite

show abstract

A semi‐numerical method to assess start and synchronization performance of a line‐start permanent magnet synchronous motor equipped with hybrid rotor

Yan

Yang

Wang

2021

IET Electric Power Appl

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The torque‐slip characteristic curve (TSCC) applicable to quantitative assessment on the starting and synchronizing performance of a line‐start permanent magnet synchronous motor (LSPMSM) equipped with a hybrid rotor is determined herein. The TSCC determination starts with separating the hybrid‐rotor LSPMSM into an induction motor and a permanent magnet (PM) motor in which the former dominates part of the TSCC and the latter governs the rest. Then, the electromagnetic torques of the two subsidiary motors are calculated by means of a two‐dimensional (2‐D) semi‐numerical technique combining the subdomain method and the finite difference method (FDM). Finally, the TSCC of the hybrid‐rotor LSPMSM is acquired through adding the average components of the calculated electromagnetic torques of the subsidiary motors. Accuracy of the obtained TSCC is validated by results from the finite‐element analysis (FEA) and prototype test.

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High‐speed solid rotor induction motor design with improved efficiency and decreased harmonic effect

Gülbahçe

Kocabaş

2018

IET Electric Power Applications

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Depending on its mechanical and thermal advantages, solid rotor induction motors (SRIMs) are widely used in demanding high-speed applications. Since eddy currents are set free in SRIMs, great part of rotor losses is caused by space harmonics created in the air-gap. Rotor losses are increased tremendously in high-speed applications with the remarkable increase in driving frequency. Here, an innovative design representing a novel stator and rotor combination that is not achieved in previous studies is proposed by structural changes to stator to eliminate major effective space harmonics. An unconventional stator slotting pattern and winding distribution is calculated by nature-inspired numerical optimisation techniques while keeping the fundamental winding factor relatively high. An example design where novel concepts are implemented is presented and a comparison is given in terms of important operational quantities with that of a standard SRIM.

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Evaluation of Rotor-End Factors in Solid-Rotor Induction Motors

Cited by 20 publications

References 22 publications

Rotor end factors for 2-D FEA of induction motors with smooth or slitted solid rotor

Rotor end factors for 2-D FEA of induction motors with smooth or slitted solid rotor

A semi‐numerical method to assess start and synchronization performance of a line‐start permanent magnet synchronous motor equipped with hybrid rotor

High‐speed solid rotor induction motor design with improved efficiency and decreased harmonic effect

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