A novel shielded superconducting energy conversion and storage system with a moving shielding coil

Résumé fourni par la source

Abstract Compared with superconducting magnetic energy storage devices, superconducting energy conversion and storage (SECS) systems can realize energy storage and release without power conversion devices, featuring a simple structure and high energy conversion efficiency. However, the energy storage capacity of conventional SECS systems remains limited. To address this issue, this paper proposes an energy storage capacity enhancement method based on equivalent inductance reduction. In this method, the equivalent inductance of the energy storage coil (ESC) is reduced, allowing a larger induced current to be generated under the same variation of the permanent magnet (PM)-generated external flux linkage, thereby increasing the energy storage capacity. To realize the proposed method, a shielded SECS topology is developed by introducing a shielding coil (SHC) that moves synchronously with the PM. Through the mutual coupling between the SHC and ESC, the equivalent inductance of the ESC is effectively reduced. A proof-of-concept prototype is developed for validation, and experimental and simulation results show that the proposed method and topology effectively increase the induced current, electromagnetic force, and energy storage capacity. This work provides a new approach for enhancing the energy storage capacity of SECS systems.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.