Design of a MgB2 Superconducting Synchronous Generator

A superconducting synchronous generator (SSG) is designed. The magnesium diboride (MgB₂) superconducting coils are employed as the field windings. The stator is composed of conventional copper coils and iron core, while the rotor has no iron core. The whole cooling method is adopted in this paper. The temperature of stator area is 70~100 K. The operating temperature of rotor area is 20 K. The thermal barrier is not placed between the stator and the rotor as compared with the prior HTS generator, so the small air gap width would be possible. To study the electromagnetic characteristics of SSG, finite element method (FEM) is implemented to optimize the SSG and obtain the performance of the initial and optimized SSG. The results indicate that the optimized model has better performance.