A theoretical investigation for the equivalent circuit model of a superconducting high-current brushless generator, the rotating spot flux pump, has been analyzed. The idealized version of the flux pump consists of a superconducting strip and a reciprocating magnet. This configuration has been used to make the mathematics manageable. Various design parameters describing the performance of the flux pump were derived. These derivations were used to determine the equivalent circuit model of the flux pump. The internal inductance of the pump associated with the switching loss was estimated from the surface current distribution on the superconducting sheet. The inductive transfer effects taking place in the pump were discussed and a numerical example was given to get a feel for the order of magnitude of the design parameters. The results of the calculations point to the advantages of the flux pump having a low internal inductance and of the current switching occurring as late as possible in the pumping cycle.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering