A new kind of superconducting motor

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

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

The construction and the tests of a superconducting machine using high and low temperature superconductors are described. The originality of the prototype concerns the design of the inductor. The inductor is composed of two coaxial superconducting solenoids made with NbTi wires separated by an YBCO superconducting plate . 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. This kind of inductor is original. The superconducting motor consists of a 3-phase stator with copper windings and this new kind of inductor. This motor have been designed by 3D finite element computations. After this design, this motor have been built and tested. The inductor has been immerged in a cryostat and cooled at 4.2 K in liquid Helium. Several tests have been carried out as follows No-load and short-circuit tests allowed us to determine the equivalent circuit parameters, Load tests in generator mode at rated conditions. Most of the measured external quantities have been checked by 3D finite element computations

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

Rada Alhasan, Thierry Lubin, Kévin Berger, Jean Lévêque, Bruno Douine. A new kind of superconducting motor. EUCAS 2015 - 12th European Conference on Applied Superconductivity, Sep 2015, Lyon, France. p. 62, id. 2M-LS-O1.6. ⟨hal-01196180⟩