Melt-growth bulk superconductors and application to an axial-gap-type rotating machine

作者：Zhang, Yufeng^*; Zhou, Difan; Ida, Tetsuya; Miki, Motohiro^*; Izumi, Mitsuru^*

来源：Superconductor Science and Technology, 2016, 29(4): 044005.

DOI：10.1088/0953-2048/29/4/044005

• HTS motor
• HTS generator
• HTS bulk magnet
• flux trapping
• pulsed field magnetization

The present manuscript addresses key issues in the course of our study of materials processing of bulk high-temperature superconductors, trapped flux and its application to a prototype axial-gaptype rotating machine. The TUMSAT group has conducted a series of studies since 2003 on the growth of GdBa2Cu3O7-delta bulk material and its application in a compact low-speed high-torque rotating machine. In the stage of material growth, gaining the advantage of a large motive torque density requires large integrated flux in the motor/generators. A large grain surface might be required with sophisticated techniques for the melt-growth texture in the bulk with optimal flux pinning. In the second stage, the in situ magnetization procedure for bulk superconductors in the applied machine is a crucial part of the technology. Pulsed current excitation by using an armature copper winding has magnetized field pole bulks on the rotor. The axial-gap flux synchronous machine studied in the past decade is a condensed technology and indicates that further scientific development is required for a future compact machine to be superior to conventional ones in accordance with the cryogenic periphery and flux stabilization.

• 出版日期2016-4
• 单位上海电力大学