Design and Analysis of 1 MW Synchronous Machine via 3D Magnetic Field Calculation

• Published in: IEEE transactions on applied superconductivity Vol. 17; no. 2; pp. 1549 - 1552
• Main Authors: BAIK, Seung-Kyu, KWON, Young-Kil, LEE, Eon-Young, LEE, Jae-Deuk, HONG, Jung-Pyo, KIM, Yeong-Chun, MOON, Tae-Sun, PARK, Heui-Joo, KWON, Woon-Sik
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: 1 MW class; 2D design; 3D design; Applied sciences; Design optimization; Electrical engineering. Electrical power engineering; Electrical machines; Electromagnetism; Electronics; Exact sciences and technology; Finite element analysis; High temperature superconductors; Iron; machine performances; Magnetic analysis; Magnetic fields; Materials; Miscellaneous; Rotating machines; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Special rotating machines; Stators; Studies; Superconducting coils; Superconducting devices; Superconducting filaments and wires; superconducting synchronous rotating machine; Synchronous machines; synchronous reactance; Performance evaluation; Output power; machine performances; 1 MW class; synchronous reactance; Magnetic circuit; Superconducting machines; Power system stability; Optimization; Finite element method; Reactance; Machine design; 2D design; Voltage stability; Voltage dip; Two dimensional analysis; Magnetic field; High temperature superconductor; Electric fault; superconducting synchronous rotating machine; Synchronous machine; Rotating machine; Stator; Superconducting wires; 3D design; Field distribution; Equivalent circuit
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2007.899204

A 1 MW class superconducting synchronous rotating machine has been designed as a draft based on 2-dimensional (2D) magnetic field distribution considering several conditions such as superconducting wire length, machine efficiency, size and so on. By the way from 2D design it is not possible to consider the effect of end coils and end portions of stator iron yoke especially in superconducting machine with air-cored structure which increases magnetic field difference between 2D and 3D analysis. In this paper electrical design based on the 3D magnetic field distribution is conducted to get more proper design result and reduce design errors from 2D design approach. As the machine has larger capacity, the superconducting machine will show the advantages more and more over the conventional machine. Although the advantages at 1MW rating are not so great, the 3D design approach to get more optimized result would be very helpful for larger superconducting synchronous machine design. Through 3D analysis such as EMCN (equivalent magnetic circuit network) method and Flux-3D FEM (finite element method), we could get smaller machine size, higher efficiency, and smaller Bi-2223 HTS (high temperature superconducting) wire length than the 2D design result. Moreover influence of an important parameter, synchronous reactance, has been analysed on the machine performances such as voltage variation and output power.