Current, induction profiles and hysteretic losses in high-Tc superconducting tapes

Numerical modelling of superconductor materials using an anisotropic Kim law

“…i n -----Bean Results are in agreement with those published in [4]. The main difference is that the cycle obtained with Kim's model, as well as with the experimental one [ll], both show a ,'bump*+ at low magnetic field which does not exist in Bean's model.…”

“…Figure 2 illustrates the difference between the hysteretic cycle calculated from Bean's model (i, = 4.6 108A/m2), the cycle obtained from a critical state model with Kim's law (jc = 4.6 lo8 A/m2, bo= 3. lo-' T), and with the one computed by using a recently proposed anisotropic law [4] QCy = 4.6 10' Nm2, box = 3. 10-1 T, jcy = 1.5 lo8 Nm', boy = 8.10-' T).…”

“…According to experimental and theoretical work, the critical current density can be expressed as follows [4]:…”

“…High T, superconductor (rrSS> devices, the performances of which are highly promising, react very much along the same lines. So, numerical models have been developed to study the electromagnetic field distribution in a superconductor device [4]. So, we also have developed a numerical model based on the critical state model, which enables us to take these phenomena into account.…”