As a current compensator, we already developed a linear type magnetic flux pump (LTMFP) that is comprised of DC coils, three phase armature coils, an LTS Nb foil and laminated linear slots. The LTMFP produced a homopolar traveling magnetic field with DC bias current and 3-phase armature current and then, a pumping current is generated in the closed superconducting loop. In this study, we have proposed an advanced LTMFP which can easily produce homopolar traveling magnetic field with the combination of a permanent magnet and the AC armature current. Since the permanent magnets have replaced DC coils in the system, its structure and operation are simplified. As well as, the heating loss of the advanced LTMFP is reduced due to the permanent magnet compared with the LTMFP. From this reason, we confirmed that the advanced LTMFP has more simplified and efficient operation compared with already developed magnetic flux pumps. This paper describes the structure and operating principle of the advanced LTMFP. As well as, the distributions of electromagnetic-thermal analysis of the LTS Nb foil were calculated based on the finite element method (FEM). Thus, in order to realize the homopolar traveling magnetic field, appropriately designing parameters of the combination of AC current and the permanent magnet were obtained.
Bibliographical noteFunding Information:
Manuscript received August 01, 2010; accepted December 18, 2010. Date of publication February 04, 2011; date of current version May 27, 2011. This work was supported by the National Research Foundation of Korea funded by the Korean Government under Grant NRF-2009-353-D00035. Y. D. Chung is with the Industry Administration Institute, College of Engineering, the University of Suwon, Hwaseong-si, Gyeonggi-do 445-743, Korea (e-mail: email@example.com). H. K. Kang is with the Electrical Engineering Department, Chungju National University, Chungju-si, Chungbuk 380-702, Korea. Y. S. Yoon is with the Electrical Engineering Department, Ansan College of Technology, Danwon-Gu, Ansan-si 425-792, Korea. T. K. Ko is with the Electrical and Electronic Engineering Department, Yonsei University, Seodaemoon-Gu, Seoul 120-749, Korea. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2010.2102325
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering