Performance evaluation of HTS synchronous motor using finite element method

• Published in: IEEE transactions on applied superconductivity Vol. 14; no. 2; pp. 920 - 923
• Main Authors: Seung-Kyu Baik, Myung-Hwan Sohn, Young-Kil Kwon, Muta, I., Tae-Sun Moon, Yeong-Chun Kim
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2004; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Electrical engineering. Electrical power engineering; Electrical machines; Electromagnetism; Electromagnets; Equations; Exact sciences and technology; Finite element analysis; Finite element method; Finite element methods; High temperature superconductors; Magnetic analysis; Magnetic fields; Materials; Mathematical analysis; Mathematical models; Power generation; Superconducting coils; Superconducting films; Superconductivity; Synchronous motors; Three dimensional; Torque; Various equipment and components; Winding; End effect; Performance evaluation; Flux line; Output power; Synchronous motor; Finite element method; 3 dimensional magnetic field distribution; Armature; Electric motor; Magnetic field; High temperature superconductor; Machine windings; Eddy-current loss; Cylindrical shape; Superconducting coils; Superconducting motors; Eddy current losses; FEM; superconducting field winding; Three dimensional model; Field distribution; magnetic field distribution; Rotating field; 2 dimensional magnetic field distribution; Superconducting tapes; HTS pancake coil; Magnetic device; Comparative study
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2004.830318

A 100 HP rated synchronous motor with superconducting rotating field winding has been designed based on the formulated equations established from 2 dimensional magnetic field distributions in a cylindrical coordinate. The cross-section was drawn based on calculated design results via Fortran program and then modeled with FEM (finite element method) to investigate the machine performances. First of all, the magnetic field distributions are analyzed in many ways according to the field directions and the armature currents. Especially after the rotating field winding is arranged with BSCCO-2223 high-temperature superconducting (HTS) pancake coils, the exerted magnetic field normally on the HTS tape is calculated through FEM. And the machine output power is calculated according to the torque angles that lie between the field and the armature main flux lines. Moreover, this paper includes the eddy-current loss variations of a copper damper located between the field and the armature coils. Finally, 3 dimensional magnetic field distribution is also calculated via FEM. The radial components of magnetic field are compared along the center line of an armature conductor section between 2 dimensional and 3 dimensional results. By the comparison we make sure that about 30% of machine output is added from the end effect of HTS field coil and more accurate design approach is possible.