Field angle dependence of AC losses in stacked Bi-2223 Ag-sheathed tapes

Fukuda, Y.; Toyota, K.; Komori, Kazuhiro; Iwakuma, Masataka; Funaki, K.

doi:10.1109/tasc.2003.812410

Cited by 15 publications

(4 citation statements)

References 6 publications

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“…For the 45°case, m versus B is also presented, which was obtained from the measurements as q = m m cos z a , q = B B cos a a (see figure 10). This transformation preserves the area of the loop and consolidates the conclusions that has been done above: in the presence of   B component the loop is similar to the one in 0°applied field, but slightly squeezed (see also [19,20]). For the 90°orientation reliable results could not be obtained in the VSM system due to a weak magnetization of the sample.…”

Section: Orientation Of the Magnetic Fieldsupporting

confidence: 83%

Magnetization loss for stacks of ReBCO tapes

Bykovsky

Marzi

Uglietti

et al. 2016

Supercond. Sci. Technol.

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The AC loss measurements of the HTS cable prototype in the EDIPO test facility motivated detailed investigations of the loss contributions from the tape, strand and cable stages of the HTS fusion conductor design proposed at Swiss Plasma Center (SPC). As an initial step of the task, magnetization tests of soldered stacks of HTS tapes were carried out at 5 K and 77 K temperatures and magnetic fields up to 12 T using the vibrating sample magnetometer (VSM) technique. The influence on the magnetization loss of the number of tapes, width of the tape, field's orientation and tape's manufacturer is studied experimentally performing both the major and minor magnetization loops with different ramp rates of the applied magnetic field. In order to validate the test results, a numerical model is developed and presented in this work. From the numerical model we also deduced an analytical approach for the magnetization loss in the stacks of tapes with arbitrary number of tapes in the critical state model. Comparison between the measured and estimated magnetization loss of the cable prototypes is reported as well.

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Section: Orientation Of the Magnetic Fieldsupporting

confidence: 83%

Magnetization loss for stacks of ReBCO tapes

Bykovsky

Marzi

Uglietti

et al. 2016

Supercond. Sci. Technol.

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“…), respectively. The magnetization losses, W magnetization , per unit volume per AC cycle in stacked BSCCO tapes exposed to the external transverse magnetic fields, B = (B x , B y , 0), with arbitrary angles have been evaluated experimentally using the following relationship [22] W magnetization (B) = − M • dB…”

Section: Specifications Of the Hts Insert For The High Field Magnetmentioning

confidence: 99%

Numerical evaluation of AC losses in an HTS insert coil for high field magnet during its energization

Kajikawa,

Awaji,

Watanabe

2014

Preprint

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AC losses in a high temperature superconducting (HTS) insert coil for a 25-T cryogen-free superconducting magnet are numerically calculated during its energization, assuming slab approximation. The HTS insert coil consists of 68 single pancakes wound with coated conductors and generating a central magnetic field of 11.5 T, in addition to a contribution of 14.0 T from a set of low temperature superconducting (LTS) outsert coils. Both the HTS and LTS coils are cooled using cryocoolers, and energized simultaneously up to 25.5 T with a constant ramp rate for 60 min. The influences of the magnitudes and orientations of the locally applied magnetic fields, magnetic interactions between turns, and the transport currents flowing in the windings are taken into account in the AC loss calculations. The locally applied fields are separated into axial and radial components, and the individual contributions of these field components to the AC losses are summed simply to obtain the total losses. The contribution of the axial field component to the total AC loss is large at the early stages of the energization, whereas the total losses monotonically increase with time after the contribution of the radial field component becomes sufficiently large.

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“…The dependence of AC losses in the Bi-2223 Ag-sheathed tapes on the direction of an external applied magnetic field has been observed experimentally [1], [2]. Their results have indicated that the AC losses increase with the field angle with respect to the tape face.…”

Section: Introductionmentioning

confidence: 95%