TY - JOUR
T1 - Effects of Noncharacteristic Harmonics on AC Losses of High-Temperature Superconducting Coils
AU - Oliveira, Roberto
AU - Murta-Pina, João
AU - Vega, Maria
AU - Alvarez, Alfredo
AU - Valtchev, Stanimir
AU - Pronto, Anabela
AU - Suarez, Pilar
N1 - Funding Information:
info:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC%2FEEI-EEE%2F32508%2F2017/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FEEA%2F00066%2F2019/PT#
Manuscript received March 16, 2021; revised May 18, 2021; accepted June 6, 2021. Date of publication June 9, 2021; date of current version August 16, 2021. Recommended for publication by Associate Editor E. Armando. (Corresponding author: Roberto A. H. de Oliveira.) Roberto A. H. de Oliveira is with the Institute for the Development of New Technologies Lisbon, 1099-085 Lisbon, Portugal (e-mail: [email protected]).
Publisher Copyright:
© 1986-2012 IEEE.
PY - 2021/12
Y1 - 2021/12
N2 - Superconductivity is a remarkable state of matter exhibited by some materials, which is characterized by the vanishing of electrical resistivity at cryogenic temperatures, among other phenomena. However, the prospective economical viability of superconducting devices relies heavily on an efficient cooling system to remove the heat generated during operation. Although this would be meaningless in conventional devices, it occurs at cryogenic temperatures, impacting the efficiency and cost of the whole system. Thus, it is necessary to predict the losses of, e.g., superconducting coils in power systems. This article presents a study of ac losses in superconducting coils due to noncharacteristic current harmonics. These harmonic components are typical in electromechanical drives like the one presented in this article. A computational model of high-temperature superconducting coils and the numerical procedure used to solve the problem are described in this article. The contribution of the noncharacteristic harmonic components in these ac losses will be presented. These results, obtained by computational analysis, were validated in experimental tests that assessed the power dissipated due to triangular waveforms currents.
AB - Superconductivity is a remarkable state of matter exhibited by some materials, which is characterized by the vanishing of electrical resistivity at cryogenic temperatures, among other phenomena. However, the prospective economical viability of superconducting devices relies heavily on an efficient cooling system to remove the heat generated during operation. Although this would be meaningless in conventional devices, it occurs at cryogenic temperatures, impacting the efficiency and cost of the whole system. Thus, it is necessary to predict the losses of, e.g., superconducting coils in power systems. This article presents a study of ac losses in superconducting coils due to noncharacteristic current harmonics. These harmonic components are typical in electromechanical drives like the one presented in this article. A computational model of high-temperature superconducting coils and the numerical procedure used to solve the problem are described in this article. The contribution of the noncharacteristic harmonic components in these ac losses will be presented. These results, obtained by computational analysis, were validated in experimental tests that assessed the power dissipated due to triangular waveforms currents.
KW - High-temperature superconductivity (HTS)
KW - power electronics
KW - switching function
UR - http://www.scopus.com/inward/record.url?scp=85111022473&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2021.3087956
DO - 10.1109/TPEL.2021.3087956
M3 - Article
SN - 0885-8993
VL - 36
SP - 13697
EP - 13705
JO - Ieee Transactions On Power Electronics
JF - Ieee Transactions On Power Electronics
IS - 12
M1 - 9449991
ER -