Design of the Cryogenic System for a 400 kW Experimental HTS Synchronous Motor

• Published in: IEEE transactions on applied superconductivity Vol. 20; no. 3; pp. 2062 - 2065
• Main Authors: Chen, Anbin, Liu, Xiaokun, Xu, Fengyu, Cao, Jiwei, Li, Liyi
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Air conditioning; Applied sciences; Coils; Control systems; Cooling; Cryogenics; Design. Technologies. Operation analysis. Testing; Electric connection. Cables. Wiring; Electrical engineering. Electrical power engineering; Electrical machines; Electromagnets; Electronics; Exact sciences and technology; Fiber reinforced plastics; high temperature superconductivity; High temperature superconductors; Integrated circuits; Liquid nitrogen; Miscellaneous; Motors; Nitrogen; Operating temperature; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; sub-cooled liquid nitrogen; superconducting motor; Synchronous motors; Temperature control; Various equipment and components; Vessels; Wires; Cooling; Thermal management (packaging); sub-cooled liquid nitrogen; high temperature superconductivity; Cryogenic temperature; Superconducting coils; Superconducting motors; Synchronous motor; Control valve; superconducting motor; Machine design; Enclosed apparatus; Cryogenics; Cooling system; Cryostat; Armature; Fibre reinforced plastics; Axial field; Electrical conductor; Electric motor; AC losses; High temperature superconductor; Alternating current
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2009.2039206

A 400 kW radial-axial flux type experimental HTS synchronous motor is designed. There are twelve armature coils used HTS wires in the motor. They are accommodated in the cooling vessels made of FRP material, and twelve cooling vessels are enclosed in the vacuum vessel. In order to cool the HTS coils of the motor, a sub-cooled liquid nitrogen cryogenic system is presented. The operation temperature is below 70 K. This system consists of HTS coils cryostats, liquid nitrogen transfer-line, liquid nitrogen dewar and a cold box with liquid nitrogen pump, G-M cryorefrigerators and some control valves inside. In this paper, different kinds of the heat loads of the system including the AC loss, current lead, supporters and radiation are presented. Basis on the heat load and operating temperature, the main parameters and equipments of the system are determined.