Naslov
Evaluation of a solid nitrogen impregnated MgB2 racetrack coil

Autori
Dipak Patel, Wenbin Qiu, Mislav Mustapić, Jonathan C Knott, Zongqing Ma, Daniel Gajda, Mohammed Shahabuddin, Jianyi Xu, Seyong Choi, Mike Tomsic, Shi Xue Dou, Yusuke Yamauchi, Jung Ho Kim, and Md Shahriar Al Hossain

Izvornik
Superconductor Science and Technology (0953-2048) 31 (2018), 10; 105010, 8

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
MgB2 conductor, racetrack coil, solid nitrogen impregnation, wind turbine generators

Sažetak
Abstract To develop powerful wind turbine generators using superconducting technology, highperformance superconducting racetrack coils are essential. Herein, we report an evaluation of a multifilamentary magnesium diboride (MgB2) conductor-based racetrack coil cooled and impregnated simultaneously by solid nitrogen (SN2). The coil was wound on a copper former with 13 mm winding width, an inner diameter of 124 mm at the curvature, and 130 mm length of the straight section. An in situ processed S- glass-insulated 36-filament MgB2 wire was wound on the former in two layers with 19.5 turns, and heat treated via the wind and react method without any epoxy resin. The coil was evaluated for critical temperature and transport critical current in the SN2 environment at different temperatures up to 31.3 K in self-field. The coil was able to carry 200 A transport current at 28.8 K in self- field. During coil charging and operation, SN2 effectively acted as an impregnation material. The test results demonstrate the viability to use MgB2 racetrack coil potentially with SN2 impregnation in advanced rotating machine applications.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA