Radial flux high temperature superconductor motor using bulk trapped field magnets

Feng, X.; Gao, G.; Davey, K.R.; Werst, M.D.; Hebner, Robert E.; Weinstein, R.; Parks, D.; Sawh, Ravi‐Persad

doi:10.1109/iemdc.2009.5075246

Cited by 14 publications

(6 citation statements)

References 8 publications

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“…As another example, consider a 3 cm diameter TFM, with PCs produced by fission ions, capable of trapping B T,MAX = 3 T at 77 K [9]. In a motor designed to utilize TFM fields to magnetize iron [19], it is difficult to utilize fields greater than 2 T because the M-19 lamination material, favoured in such motors, begins to saturate at 1.8 T. The 3.0 T TFMs in such a motor are able to function at their maximum useful field of 2 T even though there is a 1.0 cm hole in the centre. This hole then may be utilized for cooling.…”

Section: Current Distribution In Tfms and Holes Having No Effectmentioning

confidence: 99%

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Measurements of flux pumping activation of trapped field magnets

Weinstein

Parks

Sawh

et al. 2010

Supercond. Sci. Technol.

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Large grains of high temperature superconducting (HTS) material can be utilized as trapped field magnets (TFMs). Persistent currents are set up in the HTS when it is cooled in a magnetic field, or exposed to a magnetic field after cooling. TFMs have been improved over the past two decades by the efforts of a large number of worldwide research groups. However, applications using TFMs have lagged, in part due to the problem of high fields needed for activation. We describe herein experiments designed to observe the behaviour of TFM activation using repeated applications of low fields (called 'pumping'). Significant partial activation is obtained using a non-uniform pumping field (e.g., a small permanent magnet) which is higher in the centre of the HTS than at the periphery. Cooling in zero field followed by pumping with such a field results in trapping the full applied field, in comparison to half of the applied field being trapped by cooling in zero field followed by application of a uniform field. We find that for partial activation by cooling in a field and subsequent activation by pumping, the resulting fields are additive. We also conclude that for activation by fluxoid pumping, creep assists the process.

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Section: Current Distribution In Tfms and Holes Having No Effectmentioning

confidence: 99%

“…By using TFMs, motor/generator designs containing iron can utilize 1-2 T fields at liquid nitrogen temperatures [19]. Levitated flywheels using TFMs have significantly increased energy storage time.…”

Section: Introductionmentioning

confidence: 99%

Measurements of flux pumping activation of trapped field magnets

Weinstein

Parks

Sawh

et al. 2010

Supercond. Sci. Technol.

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“…Weinstein and colleagues from Houston University began the design of bulk superconducting machines in the early 1990s [54]. Recently, a radial flux HTS machine was built and tested at TECO-Westinghouse Motor Company [55]. Hexagonal Y-Ba-Cu-O bulks are closely tile-arranged and magnetized by the stator windings.…”

Section: Design Concepts and Prototype Manufacture Of Bulk Hts Rotati...mentioning

confidence: 99%

An overview of rotating machine systems with high-temperature bulk superconductors

Zhou

Izumi

Miki

et al. 2012

Supercond. Sci. Technol.

117

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The paper contains a review of recent advancements in rotating machines with bulk high-temperature superconductors (HTS). The high critical current density of bulk HTS enables us to design rotating machines with a compact configuration in a practical scheme. The development of an axial-gap-type trapped flux synchronous rotating machine together with the systematic research works at the Tokyo University of Marine Science and Technology since 2001 are briefly introduced. Developments in bulk HTS rotating machines in other research groups are also summarized. The key issues of bulk HTS machines, including material progress of bulk HTS, in situ magnetization, and cooling together with AC loss at low-temperature operation are discussed.

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“…The bulk superconductor magnet is also among the many application prospects of HTS. The HTS bulks could trap higher magnetic field than PMs and hence possess great potential for applications in compact and high performance electric motors [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a Linear Motor with HTS Bulk Magnets for Driving a Prototype HTS Maglev Vehicle

Guo¹,

Jin

Zhu³

et al. 2013

AMM

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This paper presents the performance analysis of a linear synchronous motor which employs high-temperature superconducting (HTS) bulk magnets on the mover and normal copper windings on the stator. The linear motor is designed to drive a prototype HTS maglev vehicle in which the mover is suspended by the levitation force between HTS bulks on the mover and permanent magnets on the ground. Finite element magnetic field analysis is conducted to calculate the major parameters of the linear motor and an equation is derived to calculate the electromagnetic thrust force. Theoretical calculations are verified by the measured results on the prototype.

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Radial flux high temperature superconductor motor using bulk trapped field magnets

Cited by 14 publications

References 8 publications

Measurements of flux pumping activation of trapped field magnets

Measurements of flux pumping activation of trapped field magnets

An overview of rotating machine systems with high-temperature bulk superconductors

Performance Analysis of a Linear Motor with HTS Bulk Magnets for Driving a Prototype HTS Maglev Vehicle

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