Prototype of SC inverter

Kozo Osamura, Akira Sakai, Taketsune Nakamura, Tetsuo Oka, Shinji Fukuda, Sataro Yamaguchi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

At first a function of physical unit "half pair" including superconducting (SC) elements is described. By combining their plural units, a circuit is constructed, which has essential ability for the inverter action. In practice, the YBCO thin films were used for elements of two half-pairs, which connected with the metallic load Z of Rz = 50 μΩ. AC magnetic field between 0.1 and 100 Hz was applied in order to transfer mutual elements from SC state to resistive one. The AC current of 50 Hz was observed on the load Z and its amplitude was Iz,max = 1.0 A when the source DC current of Io = 32 A was applied. Thus the efficiency became 2.8% in this case. When the frequency was 0.2 Hz, the efficiency became 14%. The main reason of the present low efficiency is owing to the resistance of SC elements. IZ,max increased remarkably when the I o increased beyond the critical current of SC elements. The inverter action has been reproduced by the computer simulation under the non-linear conditions on the VI characteristics. The conditions giving high inverter efficiency was made clear. Thus the present results gave clear evidence of SC inverter action.

Original languageEnglish
Article number5675739
Pages (from-to)1445-1448
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume21
Issue number3 PART 2
DOIs
Publication statusPublished - 2011 Jun 1
Externally publishedYes

Fingerprint

prototypes
alternating current
Io
Critical currents
critical current
computerized simulation
direct current
Magnetic fields
Thin films
Networks (circuits)
Computer simulation
thin films
magnetic fields

Keywords

  • High-temperature superconductors
  • Inverters
  • Switching circuits
  • Yttrium compounds

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Osamura, K., Sakai, A., Nakamura, T., Oka, T., Fukuda, S., & Yamaguchi, S. (2011). Prototype of SC inverter. IEEE Transactions on Applied Superconductivity, 21(3 PART 2), 1445-1448. [5675739]. https://doi.org/10.1109/TASC.2010.2093093

Prototype of SC inverter. / Osamura, Kozo; Sakai, Akira; Nakamura, Taketsune; Oka, Tetsuo; Fukuda, Shinji; Yamaguchi, Sataro.

In: IEEE Transactions on Applied Superconductivity, Vol. 21, No. 3 PART 2, 5675739, 01.06.2011, p. 1445-1448.

Research output: Contribution to journalArticle

Osamura, K, Sakai, A, Nakamura, T, Oka, T, Fukuda, S & Yamaguchi, S 2011, 'Prototype of SC inverter', IEEE Transactions on Applied Superconductivity, vol. 21, no. 3 PART 2, 5675739, pp. 1445-1448. https://doi.org/10.1109/TASC.2010.2093093
Osamura K, Sakai A, Nakamura T, Oka T, Fukuda S, Yamaguchi S. Prototype of SC inverter. IEEE Transactions on Applied Superconductivity. 2011 Jun 1;21(3 PART 2):1445-1448. 5675739. https://doi.org/10.1109/TASC.2010.2093093
Osamura, Kozo ; Sakai, Akira ; Nakamura, Taketsune ; Oka, Tetsuo ; Fukuda, Shinji ; Yamaguchi, Sataro. / Prototype of SC inverter. In: IEEE Transactions on Applied Superconductivity. 2011 ; Vol. 21, No. 3 PART 2. pp. 1445-1448.
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