Fabrication and Characteristics of HTS Induction Motor by the Use of Bi-2223/Ag Squirrel-Cage Rotor

Nakamura, Taketsune; Ogama, Y; Morita, G.; Muta, Itsuya; Hoshino, Tsutomu

doi:10.1109/tasc.2005.864293

Cited by 49 publications

(30 citation statements)

References 5 publications

(8 reference statements)

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“…In order to fabricate a high-temperature superconducting induction/synchronous motor [16][17][18], the rotor winding in a commercially available induction motor is replaced by an MgB 2 squirrel-cage-type winding. The MgB 2 wire used for the rotor winding has the three-layer structure of a mono-cored have already been published [12].…”

Section: Rotation Tests Of Superconducting Motormentioning

confidence: 99%

Development of a Liquid Hydrogen Transfer Pump System with MgB2 Wires*1

一弘¹,

広嗣²,

拓郎³

et al. 2012

TEION KOGAKU

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An electric pump composed of an MgB2 motor is combined with superconducting level sensors using thin CuNi-sheathed MgB2 wires to transfer liquid hydrogen. An impeller is attached to the lower end of a rotating shaft on the MgB2 motor and covered with an outer casing to form a centrifugal pump. Then, the MgB2 motor and impeller are placed vertically inside a cryostat with an infill of liquid hydrogen. A glass Dewar vessel is prepared to receive the liquid hydrogen transferred from the cryostat containing the MgB2 motor. The MgB2 sensors are used not only to detect the level of liquid hydrogen but also to control the electric pump on the basis of their pre-estimated calibration curves. By using the assembled pump system, the liquid hydrogen is successfully transferred from the cryostat to the glass Dewar vessel via a transfer tube. / 21Highlights: A pump system composed of an MgB 2 motor and MgB 2 level sensors was constructed. The centrifugal pump was formed by attaching an aluminum impeller to the motor. A glass Dewar vessel receives the liquid hydrogen from a cryostat for the pump. The MgB 2 sensors were used to detect the liquid level and to control the motor. Transfer of liquid hydrogen was successfully carried out with the pump system. liquid hydrogen but also to control the electric pump on the basis of their pre-estimated calibration curves. By using the assembled pump system, the liquid hydrogen is successfully transferred from the cryostat to the glass Dewar vessel via a transfer tube.

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Section: Rotation Tests Of Superconducting Motormentioning

confidence: 99%

Development of a Liquid Hydrogen Transfer Pump System with MgB2 Wires*1

一弘¹,

広嗣²,

拓郎³

et al. 2012

TEION KOGAKU

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“…Therefore, the motors for the liquid hydrogen pump with superconducting wires are expected for drastic reduction of the power dissipation in the windings. So far, it has been confirmed experimentally [10], [12] that a synchronous rotating operation without slip in the squirrel-cage induction motor can be realized by replacing the rotor winding with high-temperature superconducting tapes. Additionally, a superconducting stator winding enables us to decrease the power consumption further as total system of the pump.…”

Section: Proposal Of Superconducting Motor For Liquid Hydrogen Pumpmentioning

confidence: 99%

“…The further advantages including the above-mentioned benefits in the proposed induction/synchronous motor for the liquid hydrogen pump are summarized as follows [12]- [15]: 1) Coexistence of slip and synchronous modes. 2) Low loss and high efficiency.…”

Section: Proposal Of Superconducting Motor For Liquid Hydrogen Pumpmentioning

confidence: 99%

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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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“…HTS machines can use either bulk HTS material [8], or HTS wires [9], or even a combination of both [10]. Various types of HTS rotating machine topology have been proposed, including synchronous, homopolar [11] and induction [12].…”

Section: Hts Rotating Machinesmentioning

confidence: 99%

A Direct Drive Wind Turbine HTS Generator

Lewis

Müller²

2007

2007 IEEE Power Engineering Society General Meeting

116

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The wind turbine market is growing rapidly, and there has also been a trend toward ever increasing turbine rating. Most turbines to date has used geared high speed generators, but a history of gearbox reliability problems have turned many turbine manufacturers towards direct drive generators, which are very low speed, high torque, and therefore very large. Superconducting machines offer the possibility of much more compact machines, but the high cost of HTS wire to date has prevented their application to a cost sensitive market such as wind energy. A new generation of low cost HTS wire is being developed which will allow HTS machines to compete in such a market. Consequently, Converteam are undertaking a project to design a full size direct drive HTS generator, including the manufacture and test of a scaled model generator. The 1 st stage conceptual design phase, including economic assessment, has completed which has identified solutions to the anticipated challenges and risk.

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Fabrication and Characteristics of HTS Induction Motor by the Use of Bi-2223/Ag Squirrel-Cage Rotor

Cited by 49 publications

References 5 publications

Development of a Liquid Hydrogen Transfer Pump System with MgB2 Wires*1

Development of a Liquid Hydrogen Transfer Pump System with MgB2 Wires*1

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

A Direct Drive Wind Turbine HTS Generator

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