Could a cryoturbogenerator armature winding be superconducting?

Hlasnik, I.

doi:10.1016/0011-2275(83)90013-9

Cited by 13 publications

(2 citation statements)

References 25 publications

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“…I n order to realize the superconducting power machines and apparatuses such as power transformers [1], underground transmission cables [2], generators [3] and so on, it is important to reduce the AC losses of superconducting wires below an allowable level. We have proposed a new simple and multipurpose electromagnetic method for AC loss measurements of superconducting wires under various types of electromagnetic configuration [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation for AC losses of HTS tapes in combined alternating transport current and external AC magnetic field with phase shift

Komori

Takenaka

Kawasaki

et al. 2001

IEEE Trans. Appl. Supercond.

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AC losses are numerically evaluated for a Bi-2223 tape-shaped wire in combined alternating transport current and external AC magnetic field with a phase shift. It is considered that the external field is applied only parallel to the wide surface of tape. Since the multifilamentary wire without twisting is assumed, a solenoidal coil is simplified as a homogeneous superconducting sheet with infinitely wide surfaces. The electromagnetic quantities are numerically calculated by solving Maxwell's equations and the voltage-current characteristics represented by the power law simultaneously. The calculations of AC losses are carried out as a function of both amplitudes of transport current and external magnetic field. The obtained results are plotted on a master curve for the maximum magnetic field applied to the wire.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation for AC losses of HTS tapes in combined alternating transport current and external AC magnetic field with phase shift

Komori

Takenaka

Kawasaki

et al. 2001

IEEE Trans. Appl. Supercond.

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“…This means that the proposed superconducting motor for the liquid hydrogen pump is promising as one of the applications suitable to the present MgB 2 wires because the liquid hydrogen to be transfered itself acts as a coolant and the magnetic field applied to the windings are very small. Moreover, such a motor is immersed in the cryogenic liquid and the windings are cooled by it directly, so that it becomes unnecessary to consider a penalty factor of refrigeration [21], which has restricted the large-scale applications of superconductivity especially for AC use in comparison to the conventional techniques with the normal metal operated at room temperature.…”

Section: Proposal Of Superconducting Motor For Liquid Hydrogen Pumpmentioning

confidence: 99%

Proposal of a Fully Superconducting Motor for Liquid Hydrogen Pump With MgB<formula formulatype="inline"><tex Notation="TeX">$_{2}$</tex> </formula> Wire

Komori

Nakamura

2009

IEEE Trans. Appl. Supercond.

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Abstract-The outline design of a fully superconducting motor for liquid hydrogen pump with a magnesium-diboride (MgB2) superconducting wire is carried out to present various advantages arising from its prospective performances. The squirrel-cage rotor winding composed of superconducting loops with the MgB2 wire enables us to operate the motor not only in a slip mode but also in a synchronous rotation mode, and consequently the rotor winding loss can be suppressed drastically. Furthermore, it would be expected that the stator winding loss becomes smaller by using the MgB2 wire compared with familiar normal metals as typified by a copper. The time evolution of magnetic field distribution around the stator winding is obtained by means of a finite element analysis in order to estimate the AC loss and the primary circuit resistance.

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Trend of Applications to High-Tc Superconducting Power Transformers in Japan

Funaki

Iwakuma

2004

High Temperature Superconductivity 2

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Could a cryoturbogenerator armature winding be superconducting?

Cited by 13 publications

References 25 publications

Numerical simulation for AC losses of HTS tapes in combined alternating transport current and external AC magnetic field with phase shift

Numerical simulation for AC losses of HTS tapes in combined alternating transport current and external AC magnetic field with phase shift

Proposal of a Fully Superconducting Motor for Liquid Hydrogen Pump With MgB<formula formulatype="inline"><tex Notation="TeX">$_{2}$</tex> </formula> Wire

Trend of Applications to High-Tc Superconducting Power Transformers in Japan

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