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Communication Dans Un Congrès Année : 2014

Designing and building of an original superconducting synchronous motor

Résumé

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 superconductors bulk. 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 tow 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 contains a low-temperature superconducting NbTi wires for the coils , and a high-temperature superconducting YBCO bulk, cooled down to 4.2K using liquid helium .The armature is wound with copper wires as a classical one. To facilitate the cooling operation, the motor has a stationary superconducting inductor and a rotating armature, the cryostat is placed vertically in the air-gap of the machine. For this motor prototype, we can obtain a flux density variation of around ΔB= ± 2.4 T, in an air-gap of 2 cm. This value was calculated by the 3D simulation for a superconducting coils fed by a current density of 650 A/mm2. Compared to a classical synchronous machine, the studied superconducting motor could leads to a more important value for the flux density in the air-gap, so an increase for the torque density. This could open a new generation of superconducting machines.
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Dates et versions

hal-01025168 , version 1 (17-07-2014)

Identifiants

  • HAL Id : hal-01025168 , version 1

Citer

Rada Alhasan, Thierry Lubin, Jean Lévêque. Designing and building of an original superconducting synchronous motor. ASC 2014 - Applied Superconductivity Conference, Aug 2014, Charlotte, North Carolina, United States. page 100/2LPo1K-02. ⟨hal-01025168⟩
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