Abstract By combining multiple high-temperature superconducting (HTS) tapes into cables and then fabricating them devices such as power cable magnets, the system operating current can be effectively increased manufacturing process difficulties reduced. To improve reliability, it is necessary to conduct quality inspections on before assembly. In this paper, a non-contact measurement method utilizing screen effect proposed. The distribution characteristics of in CORC under dynamic excitation...

AC loss is one of the key problems in HTS applications. This study focuses on small Bi-2223/Ag and YBCO coils, with an emphasis presence iron core. coils core can be used a number applications, including induction heaters, motors, fault current limiters, controllable reactors transformers. The major concern interaction between coil. first provides brief introduction resistivity-adaption algorithm (RAA) method, which to simulate field penetration, based given flux motion theory. A general...

Abstract The flux motion and its collective behaviour known as AC loss is the basic characteristic of high temperature superconducting (HTS) materials controls economic efficiency, stability magnetic field uniformity equipment. In so far, we have no method to calculate HTS devices in an efficient way. Normally, it will take days simulate coils even with moderate number turns. this paper, surprisingly found that integral remarkably calculating large scale. By comparing fastest at present,...

Abstract Flux penetration and AC loss are among the key problems in application of high-temperature superconductors (HTSs). Through simulation, value distribution HTS equipment can be evaluated optimized design stage, so as to ensure reliability stability equipment. At present, there many algorithms for calculation that simplified a two-dimensional model, but case three-dimensional structure such cable spiral structure, still some difficult meshing, convergence, low efficiency. In this...

The Normal zone propagation velocity (NZPV) of a double-layer second generation high temperature superconducting wire manufactured by American Superconductor has been measured electrical and thermal methods, the results have compared discussed. NZPV values determined voltage traces are ranging from 3.8 mm/s at 0.4 I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> to 19.2 0.9 ; while 5.9 18.3 traces. these two approaches agrees well with...

Inductance is a very commonly used electrical parameter in transient progress analysis, as well energy storage evaluations. It was normally considered constant when the geometrical configuration of coil determined. However, experiments on Bi-2223 (Bi <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Sr Ca Cu xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">10+x</sub> ) and YBCO (YBa...

The prediction of critical current the HTS coil is necessary in applications. This paper focuses on AC loss and temperature distribution a BSCCO coil, based electro-thermal coupling environment, with an emphasis cooling boundary. major concern this balance between efficiency environment. first provides 2-D axisymmetric model resistivity-adaption algorithm method heat conduction equations. Then, different thermal contact conditions methods are discussed. A 52-turn Bi2223/Ag double-pancake...

Since there is no iron core and the energy only coupled through primary secondary windings, air-core transformers have advantages of loss, magnetic saturation, compact in size, which make them attractive to be studied for practical applications. Due its high current density low temperature superconductor (HTS) brings additional this type transformer. The HTS wires are highly field dependent their characteristics required implementation design transformers. As a result, distribution windings...

In this paper, the Ic degradation of bent YBCO tapes has been experimentally studied. The characteristics in length direction was measured through a non-contact, continuous measurement equipment (Mcorder), which is suitable for all kinds high temperature superconducting (HTS) tapes. detailed Jc mapping investigated by Hall microscopy (Mcorder 2-D), scans fields distribution on surface films or bulks. A 4.1-m-long tape wound 4.5-mm-diameter core with face outside inside. critical current...

In the study, molecular dynamics simulation method is utilized to investigate physical characteristics of nanoscale titanium aluminum alloy powder during 3D printing (additive manufacturing) bed fusion laser sintering process. The radius gyration, neck width and root mean square different size process under heating rate analyzed discussed. solid/hollow spherical binary are simulated, internal lattice changes also observed. It found that phenomena spontaneous solid-state occurred at room...

Reducing heat leakage is crucial for the development of practical superconducting devices. In this work, orthogonal experimental design method first used to optimize hundred-ampere and kiloampere Peltier current leads (PCLs). Geometry arrangement materials conductive lead are analyzed. Through our simulation, we find that coupling effect between radius Bi2Te3 (r2) length (L2) has greatest on PCLs at cold end both PCLs. Furthermore, numerical simulations suggest lowest (approximately 30.0...

The need for energy is growing as civilization develops. Superconductors have various benefits over regular conductors, including a high current-carrying density and nearly no resistance. Therefore, the objective that scientists continue to seek use of superconductors replace traditional conductors in order satisfy demand energy. As key part superconducting electrical system, critical current one properties high-temperature (HTS) coils. Scholars created variety numerical simulation models...

Until recently, a new type of open magnetic shielding system was realized by the combination series closed high temperature superconductor coils. We experimentally confirmed that factor (SF) can reach more than 40 dB in frequency spectrum 0.1-16 000 Hz. Because its superior ability to resist alternating field, we named, Tesla-shielding (TS), commemorate father current, Nikola Tesla. In this paper, will report design and realization Helmholtz coil-based TS. The TS has many advantages over...

Most HTS (high-temperature superconductor) coils will quench due to defects in the winding. Some of these come from tape manufacturing, but more commonly are generated process making a coil, especially for YBCO racetrack that use epoxy resin solidify In order find out defects, chemical solutions used dissolve three damaged coils. tapes reclaimed scanned by MCorder, continuous critical current measurement device can tell amplitude and distribution high speed resolution. The scan result shows...

The molecular dynamics simulation method is utilized to investigate the physical characteristics of nanoscale vanadium powder during 3D printing bed fusion laser sintering process. radius gyration, neck width, and root mean square different size process under heating rate analyzed discussed. width internal lattice changes are also observed.It observed that temperature solid state diffusion decrease with increasing, but increase decreasing. It found coalescence range between 1600K 1950K,...

To meet the increasing and various demands for low magnetic field measurement, an open shielding system created using a combination of copper coils precisely designed superconducting closed is proposed. After testing, prototype showed factor more than 10 000 in direct current most importantly, at least 100 alternating from frequencies 0.01-100 Hz 5 cm spherical volume. We interestingly found that purity capable catching up with magnetically shielded room moderate performance. The structure...