A performance comparison of different rotor types for high-speed induction motors

McGuiness, Daniel; Gülbahçe, Mehmet Onur; Kocabaş, Derya Ahmet

doi:10.1109/eleco.2015.7394606

Cited by 14 publications

(14 citation statements)

References 6 publications

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“…The development of high-speed electric machines (HSEM) for power plants is considered in [10][11][12], it is shown that synchronous electric machines with permanent magnets on the rotor have the best energy performance [10,12]. The material of these magnets has a low tensile strength, so the HSEM rotor has a surface arrangement of magnets, which are fixed with a bandage [10,13].…”

Section: Selection Of the Type And Configuration Of A Power Generatormentioning

confidence: 99%

“…However, asynchronous rotor of a traditional design with a short-circuited winding cannot be used due to problems with ensuring strength. In this case, electric machines with a massive rotor have found application [11,12]. Their advantages include the simplest rotor design and the ability to obtain the maximum possible rotation speeds, but in terms of their efficiency and specific indicators, they are inferior to other types of high-speed power generators [12].…”

Section: Selection Of the Type And Configuration Of A Power Generatormentioning

confidence: 99%

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High speed power generator for low power steam turbine

et al. 2020

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The paper discusses the issues of creating a high-speed power generator for a low-power steam turbine. A 50 kW power generator with a rated speed of 12,000 rpm was developed. The influence of control parameters on the power generator performance was analyzed. The electromagnetic processes in the power generator were mathematically modeled. For the single-pulse control algorithm used in the generation mode, rational ratios of the angles of the beginning and end of the voltage pulse were established. The analysis of the obtained results shows that the developed power generator meets the set requirements for joint operation with a steam turbine. The choice of a valve-inductor machine for this purpose makes it possible to significantly simplify the design, reduce the costs of production and improves the reliability of the system as a whole. The peculiarities of the implementation of control algorithms make it possible to use a minimum number of sensors and not to use the rotor position sensor.

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Section: Selection Of the Type And Configuration Of A Power Generatormentioning

confidence: 99%

Section: Selection Of the Type And Configuration Of A Power Generatormentioning

confidence: 99%

High speed power generator for low power steam turbine

et al. 2020

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“…Different commutatorless electric machines can be used as high-speed electric generators for gas micro-turbines. The permanent magnet synchronous electric machines have the best specific indicators [5]. However, the problems of ensuring the permanent magnets strength limit the power of the generator depending the rotational speed [6,7].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Model of a Solid Rotor Asyncronous Electric Machine

Kolpakhchyan*,

Shaikhiev,

Kochin

et al. 2019

IJITEE

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The article deals with solid rotor asynchronous electric machine mathematical model. It is substantiated that the use of generalized electrical machine theory for building the mathematical model is rational at the design stage to analyze the electromagnetic and electromechanical processes in an electric machine and a power converter. The mathematical model with some circuits on the rotor was considered to account for the effect of current displacement in a solid rotor. We used the field theory to determine the number of circuits. For this purpose, the calculations series of the magnetic field distribution in the active part of the electric machine when the rotor is stationary (in short circuit mode) and the stator winding are powered by different frequencies currents were carried out. The modeling of a high-speed electric generator with a solid asynchronous rotor was carried out. Its power is 100kW and its rotational speed is 100 000 rpm. The analysis of the high-speed generator parameter approximation showed that the use of three circuits in the equivalent circuit is rational to account for the effect of current displacement in a solid rotor. The mathematical model results when connecting a rotating high-speed electric generator to a voltage source are showed. The assessment of the current displacement effect in a solid rotor was examined twice: with one circuit in a rotor chain and with three circuits in it. Comparison of the electromagnetic processes modeling results showed that the use of three circuits model provides the more accurate representation of electromagnetic processes in the solid rotor asynchronous electric machine. The modeling results significantly differs during transients when using the one-circuit model. In the steady state, the stator current fundamental harmonics and the average value of electromagnetic moment are the same for both models.

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“…Solid rotor induction motors (SRIMs) have robust cylindrical mass rotors bringing about better mechanical and thermal properties besides its disadvantages in grid frequency operations like high slip, low efficiency, low power factor etc. When it comes to highspeed operation, rotor structure becomes prominent [1][2][3][4][5][6][7]. Conventional cage rotor induction motor (CRIM) cannot resist centrifugal forces [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…When it comes to highspeed operation, rotor structure becomes prominent [1][2][3][4][5][6][7]. Conventional cage rotor induction motor (CRIM) cannot resist centrifugal forces [1,2]. CRIM cannot provide a reliable operation in demanding applications like high-speed compressor techniques, micro gas turbines, and turbochargers [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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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A performance comparison of different rotor types for high-speed induction motors

Cited by 14 publications

References 6 publications

High speed power generator for low power steam turbine

High speed power generator for low power steam turbine

Mathematical Model of a Solid Rotor Asyncronous Electric Machine

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

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