Test of an original superconducting synchronous machine based on magnetic shielding

Rada Alhasan (1) , Thierry Lubin (1) , Bruno Douine (1) , Jean Lévêque (1)

1 GREEN - Groupe de Recherche en Electrotechnique et Electronique de Nancy

We present a new concept for a two-pole superconducting synchronous machine. This electrical motor is composed of a classical stator yoke, and an original superconducting inductor. The inductor is composed of two coaxial circular superconducting coils separated by superconducting bulks. Both solenoids are fed by a direct current and each of them produces a magnetic field in the same direction. An inclined superconducting bulk is placed between the two solenoids. It is used as superconducting magnetic barrier. The diamagnetic behavior of a superconducting bulk cooled under zero-field is used to obtain a variation of the magnetic flux density in the air-gap. The inductor is made of low-temperature superconducting wires for the coils, NbTi, and a high-temperature superconducting YBCO bulk, cooled down to 4.2K using liquid helium for the flux barrier. The armature is wound with copper wires as a classical one. We present design and tests of this superconducting motor. We made no load, short-circuit and full load tests.

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

Rada Alhasan, Thierry Lubin, Bruno Douine, Jean Lévêque. Test of an original superconducting synchronous machine based on magnetic shielding. 24th International Conference on Magnet Technology - MT24, Oct 2015, Seoul, South Korea. page 141/3OrCA_01. ⟨hal-01218195⟩