Numerical Evaluation of AC Loss Property in Bi-2223 Tapes Affected by Multifilament Structure

Komori, Kazuhiro; Nakamura, Daisuke; Hayashi, Toshihiro; Funaki, K.

doi:10.1109/tasc.2007.898390

Cited by 5 publications

(1 citation statement)

References 12 publications

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“…We have also tried to fabricate and test HTS-ISMs for different kinds of the HTS wire, i.e., YBCO coated conductors in collaboration with Superconductivity Research Laboratory (SRL) as well as Chubu Electric Power Co., Inc, Japan [6], and DI-BSCCO wires in collaboration with Sumitomo Electric Industries, Ltd. (SEI), Japan [7]. Furthermore, we have started developing a liquid hydrogen circulation pump system with Kyushu University, based on an HTS-ISM that utilizes MgB 2 squirrel-cage windings [8].…”

Section: Introductionmentioning

confidence: 99%

An induction/synchronous motor with high temperature superconductor/normal conductor hybrid double-cage rotor windings

Nakamura¹,

Nagao²,

Nishimura³

et al. 2009

Supercond. Sci. Technol.

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We propose hybrid double-cage rotor windings that consist of a high temperature superconductor (HTS) and a normal conductor, which are introduced into an HTS induction/synchronous motor (HTS-ISM). The motor rotates as a conventional induction motor when the operating temperature of the hybrid rotor is above the critical temperature of the HTS bars, i.e., in the normal conducting state. On the other hand, the HTS-ISM rotates as a synchronous motor when the temperature is below the critical temperature, i.e., in the superconducting (zero resistance) state. In other words, we do not always need to take care of the cooling conditions, if the HTS-ISM is automatically, as well as appropriately, controlled, depending upon the rotation mode. Namely, the above-mentioned hybrid double-cage HTS-ISM is possibly a breakthrough in solving the cooling problems of HTS rotating machines, especially for industrial applications. The experimental results of the aforementioned motor are reported. An example of an operation flowchart of the motor is also presented and discussed.

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Section: Introductionmentioning

confidence: 99%