解説
Gd系バルク高温超電導体を用いた同期モータ
2011 年 46 巻 3 号 p. 89-93
詳細
2011 年 46 巻 3 号 p. 89-93
In this article, the development progress of our GdBaCuO 30-kW-grade bulk HTS motor is presented. Two main features will be described here: the addition of the bulk HTS field poles using magnetic particles, and the amelioration of the condensed-neon cooling system through the addition of a gaseous helium phase. Owing to this new cooling procedure, the cooling time of the motor was reduced by more than 30% and the flux decay following the in-situ magnetization of the bulk HTS was halved. The addition of magnetic particles into the Gd-123 bulks allowed a 1.1- to 1.4-fold trapped flux density and an additional reduction of the flux decay from 7% to approximately 4% after five hours of synchronous operation under an AC field.
