Design of a 100 W, 500000 rpm permanent-magnet generator for mesoscale gas turbines

Zwyssig, C.; Kolar, Johann W.; Thaler, W.; Vohrer, M.

doi:10.1109/ias.2005.1518318

Cited by 84 publications

(46 citation statements)

References 10 publications

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“…In the second optimization step optimal conductors that fit the available winding space were selected so as to minimize copper loss for the estimated phase currents and the maximum current (electrical) frequency (3.33 kHz). The optimization procedure is quite similar to the one presented in [146].…”

Section: Optimization Of Conductorsmentioning

confidence: 68%

“…Amorphous iron has excellent figures of losses and very favorable magnetic properties [146,182] in comparison with other, more common core materials. However, amorphous iron is brittle and available only in form of ring tape cores and could not be processed to fit into the bearings.…”

Section: Stator Corementioning

confidence: 99%

“…The DN value of the used bearings is around 1.6 million [146], however, no data on durability of those bearings is available.…”

Section: Mechanical Bearingsmentioning

confidence: 99%

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Limits, Modeling and Design of High-Speed Permanent Magnet Machines

Borisavljevic¹

2013

Springer Theses

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Section: Optimization Of Conductorsmentioning

confidence: 68%

Section: Stator Corementioning

confidence: 99%

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Limits, Modeling and Design of High-Speed Permanent Magnet Machines

Borisavljevic¹

2013

Springer Theses

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“…al [46], [47] have built some of the highest rotational speed machines. In [46] the design, analysis and testing of a 100W 500000rpm PM generator for a mesoscale gas turbine is described. The rotor consists of a parallelmagnetised, solid cylindrical magnet which is held within a hollow-section of a two-part titanium shaft.…”

Section: B High Speed Permanent Magnet Machinesmentioning

confidence: 99%

“…19. 100W 500,000 rpm PM machine [46] Zhao et al [48], [49] present the design of a 2kW 200,000rpm PM motor for a reverse-turbo Brayton cycle cryocooler. Similarly to [47] a slotless stator is used, and a solid magnet is fit inside a hollow shaft.…”

Section: B High Speed Permanent Magnet Machinesmentioning

confidence: 99%

High-Speed Electrical Machines: Technologies, Trends, and Developments

Gerada

Mebarki

Brown

et al. 2014

IEEE Trans. Ind. Electron.

815

256

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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.ukAbstract-This paper reviews the current technologies used in high speed electrical machines, through an extensive survey of different topologies developed and built in industry as well as in academia for several applications. Developments in materials and components including electrical steels and copper alloys are discussed, and their impact on the machines' operating physical boundaries is investigated. The main application areas pulling the development of high speed machines are also reviewed in an effort to better understand the typical performance requirements.Index Terms-high speed electrical machines, high frequency electrical machines, high strength electrical steels, high frequency electrical steels, copper alloys, thermal modeling, mechanical modeling.

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Design of a high speed interior claw synchronous reluctance machine

Rouhani

Abdollahi

Gholamian

2021

Int Trans Electr Energ Syst

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Synchronous reluctance machine (SynRM) is one of the candidates of highspeed application drives. The rotor of this machine, as the most important and most challenging part of the design, has various tangential and radial ribs. Therefore, the quantity, thickness and length of the ribs are significant SynRM design parameters. If ribs' thickness is increased in order to enhance the mechanical robustness, its magnetic properties will be substantially deteriorated and vice versa. In this paper, by employing interior claws, a new rotor for SynRM is designed in a way that while increasing the mechanical robustness of the rotor for high speeds application, its magnetic characteristics enhanced, too. For this purpose, the proposed design method is applied on a two-flux barrier rotor of a 24 stator slot SynRM. The designed machine electromagnetic performance is evaluated by finite elements method (FEM) simulation and compared with other designs. Also, the mechanical strength of the proposed rotor with two alternative claws for the speeds up to 50krpm are evaluated and confirmed by structural FE analysis. At the end, the designed interior claw rotor is prototyped and tested. Prototyped SynRM magnetic characteristics that are extracted by experiment confirmed simulations results with acceptable accuracy. K E Y W O R D S flux barrier, flux carrier, interior claw, strain, yield stress List of Symbols and Abbreviations: k wq , Total width flux barrier to total flux carrier ratio; W bi , Width i-th flux barrier; C i , Width i-th flux carrier; N b , Number of flux barrier in the rotor per pole; N c , Number of flux carrier in the rotor per pole; P, Machine's pole pair number; I, Current (A); f qbi , Average mmf of each (i-th) flux barrier along with the q-axis; α 1 , Rotor slot pitch angle (mechanical); f q , q-axis component of the stator mmf (fundamental amplitude in per unit); n s , Machine's slot stator number; Δf qi , Differential average mmf over the each (i-th) barrier; D sh , Shaft diameter; α 2 , The end of final flux barrier angle (mechanical) to q-axis; N bi , i-th flux barrier; f dci , Average mmf of each (i-th) flux carrier along with the d-axis; f d , d-axis component of the stator mmf (fundamental amplitude in per unit); L d , d-axis inductance; L q , q-axis inductance; TR x , Thickness of tangential rib (mm); RR x , Thickness of radial rib (mm); T av , Average Torque (Nm); σ yield , Yield strength of core laminate; σ calc , Calculated maximum stress by FEM; W core , Width of core laminate; ΔT, Torque ripple; ω, Angular speed (mechanical); R so , Rotor slot opening (mm); F c , Centrifugal force over the each flux carrier; V, Velocity of rotor outer surface (m/s); m c , Mass of flux carrier; R c , Radius of center of gravity of flux carrier; S so , Stator slot opening (mm); D r , Rotor outer diameter; k, Factor of safety; n max , Maximum speed; n calc , Calculated speed by FEM; ξ, saliency ratio; SynRM, Synchronous Reluctance Machine; FEM, finite elements method; IM, induction machines; PMSM, permanent magnet synchr...

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Design of a 100 W, 500000 rpm permanent-magnet generator for mesoscale gas turbines

Cited by 84 publications

References 10 publications

Limits, Modeling and Design of High-Speed Permanent Magnet Machines

Limits, Modeling and Design of High-Speed Permanent Magnet Machines

High-Speed Electrical Machines: Technologies, Trends, and Developments

Design of a high speed interior claw synchronous reluctance machine

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