In this paper, we present a new kind of superconducting inductor for a synchronous machine. This inductor is composed of two superconducting coils (solenoids) having the same axis and fed by the same current. A superconducting bulk is used to obtain a variation of the flux density in the air-gap. This superconducting bulk is surrounded by a ferromagnetic material in order to improve the distribution of the radial component of the flux density. With the studied inductor, we obtain a two-pole synchronous machine having a high magnetic field value in the air-gap. The main objective of this paper is to show the feasibility of this new concept of inductor.

International audienceIn this paper, we present a new kind of superconducting inductor for the synchronous machine. This inductor is composed of a two superconducting coils having the same axis and fed by a currents with the same direction. A superconducting bulk is used in order to achieve a variation of the flux density in the air-gap. The superconducting bulk is surrounded by a ferromagnetic material in order to improve the radial component of the flux density in the air-gap. With the proposed superconducting inductor, we obtain a two-poles electrical machine with an important value of a magnetic field in the air-gap

The aim of this paper is to present a new concept of superconducting inductor for a synchronous machine. This inductor consists of two superconducting coils. These coils have the same axis and are fed by the same current. A superconducting bulk is placed between the two coils in order to obtain a variation of the flux density in the air-gap. This bulk is surrounded by a ferromagnetic material to improve the distribution of the air-gap magnetic field. With the proposed superconducting inductor, we obtain an electrical machine which presents two poles with a high value of the magnetic field in the air gap. In order to show the feasibility of this new superconducting inductor, a prototype has been built and experimental results are given in this paper.