3D Magnetic Field Modeling of a New Superconducting Synchronous Machine Using Reluctance Network Method

Moussa Kelouaz (1) , Youcef Ouazir (1) , Larbi Hadjout (1) , Smail Mezani (2) , Thierry Lubin (2) , Kévin Berger (2) , Jean Lévêque (2)

1 LSEI - Laboratoire des Systèmes Electriques et Industriels
2 GREEN - Groupe de Recherche en Energie Electrique de Nancy

In this paper a new superconducting inductor topology intended for synchronous machine is presented. The studied machine has a standard 3-phase armature and a new kind of 2-poles inductor (claw-pole structure) excited by two coaxial superconducting coils. The air-gap spatial variation of the radial flux density is obtained by inserting a superconducting bulk which deviates the magnetic field due to the coils. The complex geometry of this inductor usually needs 3D finite elements (FEM) for its analysis. However, to avoid a long computational time inherent to 3D FEM, we propose in this work an alternative modeling which uses a 3D meshed reluctance network. The results obtained with the developed model are compared to 3D FEM computations as well as to measurements carried out on a laboratory prototype. Finally, a 3D FEM study of the shielding properties of the superconducting screen demonstrates the suitability of using a diamagnetic-like model of the superconducting screen.

Mots clés: Inductor; Superconducting coils and bulks; Synchronous machine; 3D reluctances network

Domaines: Energie électrique; Electromagnétisme; Supraconductivité [cond-mat.supr-con]

Moussa Kelouaz, Youcef Ouazir, Larbi Hadjout, Smail Mezani, Thierry Lubin, et al.. 3D Magnetic Field Modeling of a New Superconducting Synchronous Machine Using Reluctance Network Method. Physica C: Superconductivity and its Applications, 2018, 548, pp.5-13. ⟨10.1016/j.physc.2018.01.018⟩. ⟨hal-01694699⟩