Electromagnetic Field Calculation of Superconducting Magnetic Levitation Rotor Under Alternating Magnetic Field

Calculating and analyzing the distribution of electromagnetic fields under alternating magnetic fields is crucial for the structural design of superconducting magnetic levitation rotor (SMLR). This article mainly focuses on the calculation of the electromagnetic field of SMLR. First, the relationship between superconducting rotor current and electromagnetic field is analyzed, and the influence of environmental temperature on penetration depth is clarified. The magnetic induction intensity and induced current density at different penetration depths are obtained. The correctness of the analytical calculation is verified through 3-D finite element simulation. Finally, the current loss and temperature rise of SMLR under alternating electromagnetic field are calculated. The results show that the loss and temperature rise generated by normal current will not affect the normal operation of rotor, laying the foundation for the subsequent thermal load design of SMLR.