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Measurement of magnetization loss according to the winding pitch of CORC®

  • Received : 2021.11.08
  • Accepted : 2021.12.23
  • Published : 2021.12.31

Abstract

For the application of HTS wire to AC power equipment, a conductor with high current capacity and low loss is required. CORC®, one of the high-current conductors manufactured using several HTS wires, is made by winding the wires in a spiral on a cylindrical former. Because the magnetization loss of a CORC® conductor depends on the degree of magnetic coupling between the wires constituting the CORC®, it is necessary to know the value of the magnetization loss of the CORC® itself. In order to obtain an accurate loss value, it is necessary to know the effect of the ratio of the winding pitch of the CORC® conductor in the pickup coil region sampling the magnetization loss signal. To confirm this effect, we prepare CORC® samples having various winding pitches, and measure and compare the magnetization losses. In addition, the magnetization loss was measured while rotating the CORC® samples and it was examined whether there was a difference in the magnetization loss according to the rotation.

Keywords

Acknowledgement

This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education(2019R1I1A3A01063158) This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Science and ICT(2021R1F1A1063208)

References

  1. F. Grilli, A. Kario, "How filaments can reduce AC losses in HTS coated conductors: A review," Supercond. Sci. Technol., vol. 29, no. 8, Jul. 2016, Art. no. 083002.
  2. J. Souc, et al., "Low AC loss cable produced from transposed striated CC tapes," Supercond. Sci. Technol., vol. 26, no. 7, Jun. 2013.
  3. J.-K. Lee et al., "AC loss analysis of striated HTS compact cables for low loss cable design," IEEE Trans. Appl. Supercond., vol. 23, no. 3, Jan. 2013, Art. no. 5900804.
  4. N. Glasson et al., "Test results and conclusions from a 1 MVA superconducting transformer featuring 2G HTS Roebel cable," IEEE Trans. Appl. Supercond., vol. 29, no. 4, Jun. 2017, Art. no. 5500205.
  5. E. Pardo et al., "Ac loss modelling and measurement of superconducting transformers with coated-conductor Roebel-cable in lowvoltage winding," Supercond. Sci. Technol., vol. 28, no. 11, Oct. 2015, Art. no. 114008.
  6. W. Goldacker et al., "Roebel cables from REBCO coated conductors: A one-century-old concept for the superconductivity of the future," Supercond. Sci. Technol., vol. 27, no. 9, Aug. 2014, Art. no. 093001.
  7. J. D. Weiss et al., "Introduction of CORC wires: Highly flexible, round high-temperature superconducting wires for magnet and power transmission applications," Supercond. Sci. Technol., vol. 30, no. 1, Jan. 2017, Art. no. 014002.
  8. J. Goo et al., " Magnetization loss estimation of HTS solenoid coils wound with CORC," IEEE Trans. Appl. Supercond., vol. 30, no. 4, Jun. 2020, Art. no. 4704007.
  9. M. Vojenciak et al., "Magnetization ac loss reduction in HTS CORC cables made of striated coated conductors," Supercond. Sci. Technol., vol. 28, no. 10, Sep. 2015.
  10. Z. Jiang and N. Amemiya, "An experimental method for total AC loss measurement of high Tc superconductors," Supercond Sci. Technol., vol. 17, no. 3, pp. 371-379, Mar. 2004. https://doi.org/10.1088/0953-2048/17/3/014
  11. J. Goo, J. -W. Han, S. Lee, W. -S. Kim, K. Choi and J. -K. Lee, "Magnetization Loss of CORC With Various Configurations of 2G HTS Strands," in IEEE Transactions on Applied Superconductivity, vol. 31, no. 5, pp. 1-5, Aug. 2021, Art no. 5901205