Magnetization Loss and Shield Effect in Multi-Stacked Tapes With Various Stacking Configurations

A 600 kJ Superconducting Magnetic Energy Storage System (SMES) project with High Temperature Superconductor (HTS) started as a national project in Korea. The HTS model coils were designed and fabricated for a preliminary test prior to the creation of a full scale prototype. Single reinforced BSCCO-2223 wires were used for the model coils and the operating temperature was decided to be 20K. Even though an SMES is not an AC-powered device, time-varying currents during the charging and discharging periods lead to the generation of time-variation magnetic fields applied to the model coils and the generation of AC loss. In this paper, AC loss and the temperature distribution of model coils are analyzed and discussed.

Section: B Operating Loss and Ac Lossmentioning

confidence: 82%

AC Loss and Thermal Stability of HTS Model Coils for a 600 kJ SMES

Park

Kwak

Kim

et al. 2007

“…For large power application using HTS tape, the stacked conductor packing a number of HTS tapes should be used because the current carrying capacity of a single conductor is limited. The stacked conductor has different AC loss characteristics from single tape because the screening currents in the adjacent tapes affect the local magnetic field at the position of each tape in the stacked conductor [3]- [6]. Manuscript The magnetization loss in perpendicular external magnetic field is the main component of AC losses of the YBCO coated conductor in power application.…”

Section: Reduction Effect On Magnetization Loss In the Stacked Conducmentioning

confidence: 99%

Reduction Effect on Magnetization Loss in the Stacked Conductor With Striated and Transposed YBCC Coated Conductor

Lee

Byun

Han

et al. 2009

Recently, it is proposed to make striations on the YBCO coated conductor and to transpose each other as one of the solutions to decrease the perpendicular magnetization loss. For large power application using HTS, the stacked conductor packing the YBCO coated conductors should be used because the current carrying capacity of a single conductor is limited. The stacked conductor has different AC loss characteristics from single conductor because the screening currents in the adjacent conductors affect the local magnetic field at the position of each conductor in the stacked conductors. In this paper, we research the effect by the stack, striation and transposition on magnetization loss of YBCO coated conductors in perpendicular magnetic field. To estimate the reduction effects of perpendicular magnetization loss, several short samples as the stacked conductor with striation and transposition are prepared and tested. We compare the measured results of the conductors with that of the single YBCO coated conductor to estimate the reduction effects.

“…Magnetization losses of multi-stacked wires differ from that of a single wire because the distributions of screening current differ from one wire to another wire of a multi-stacked wire [1]. Multi-stacked wires which are made of BSCCO wires are being currently used in superconducting motors and superconducting transformers [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Effects of Hybrid Multi-Stacking of BSCCO Wires and YBCO Wires on AC Loss

Lim

Cha

Lee

2007

The multi-stacked wires which are made of one type of wires, YBCO wires or BSCCO wires, are being currently used in superconducting machines. Property of hybrid multi-stacked (HMS) wire made of the combination of YBCO wire and BSCCO wire can be different from the uniform multi-stacked (UMS) wire. This paper presents the magnetization losses of HMS wires which were made of YBCO wires and BSCCO wires. HMS 2 stacked (YB) wire and HMS 4 stacked (YYBB, YBYB, YBBY and BYYB) wires were tested. Y and B stand for YBCO wire and BSCCO wire, respectively. The YBCO wire and the BSCCO wire which had similar width were chosen to fabricate the UMS wires and HMS wires. The losses of the HMS wires were compared with the loss of UMS wires. According to the measurement results of the HMS 2 stacked wire and HMS 4 stacked wires, the loss of HMS wire was between the loss of UMS BSCCO and UMS YBCO wire at low magnetic field and it was almost the same with those of UMS BSCCO and UMS YBCO wire at high magnetic field.