The effect of flux diverters on AC losses of a 10kVA high temperature superconducting demonstrator transformer
Al-Mosawi, M.K., Beduz, C., Yifeng, Yang, Webb, M. and Power, A. (2001) The effect of flux diverters on AC losses of a 10kVA high temperature superconducting demonstrator transformer. Institute of Electrical and Electronics Engineers: Transactions on Applied Superconductivity, 11, (1), 2800-2803. (doi:10.1109/77.919645).
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Description/Abstract
In this paper the design, construction and characterization of a 50 Hz single phase high temperature superconducting (HTS) transformer is presented. The transformer is designed to deliver 10 kVA at 77.4 K and 20 kVA at 65 K. The transformer is made of two windings positioned at the middle limb of a three-limb iron core. The secondary winding is made of nine double pancake superconducting coils, using silver sheathed BPSCCO-2223 multifilamentary tapes with nominal critical current of 20 A (at 77.4 K and self field). The primary winding is made of copper to reduce the cost of HTS material. Utilizing a superinsulated nonmetallic doughnut shaped cryostat with low background heat leak, the AC losses in the superconducting winding have been measured by calorimetric method. Two powdered iron flux diverters have been used inside the cryostat at both ends of the superconducting winding in order to reduce the radial component of leakage flux density in the HTS tapes. The use of these flux diverters is shown to be very effective in reducing the AC losses by 40% at the nominal current
| Item Type: | Article |
|---|---|
| Additional Information: | This paper describes the design, construction and test of the first United Kingdom High temperature superconducting (HTS) transformer which was sponsored by the National Grid Company. The paper presents an outstanding research and unique experimental results which addresses the novel and significant use of magnetic flux diverters in HTS transformers for reduced losses and improved performance. It demonstrated experimentally the importance of shaping the leakage magnetic field in the end region of the winding to reduce the influence of the field component perpendicular to the broad face of the tape. Cited 8 times (3 times in 2005, 2 times in 2003, 3 times in 2002). Grade 4 |
| ISSNs: | 1051-8223 (print) |
| Related URLs: | |
| Keywords: | bismuth compounds, calcium compounds, critical current density (superconductivity), cryostats, high-temperature superconductors, magnetic flux, magnetic leakage, multifilamentary superconductors, power transformers, strontium compounds, superconducting tapes, superconducting transformers, transformer windings |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences |
| Item ID: | 21466 |
| Date Deposited: | 10 Mar 2006 |
| Last Modified: | 01 Apr 2012 01:26 |
| Contributors: | Al-Mosawi, M.K. (Author) Beduz, C. (Author) Yifeng, Yang (Author) Webb, M. (Author) Power, A. (Author) |
| Date: | March 2001 |
| Additional Information: | This paper describes the design, construction and test of the first United Kingdom High temperature superconducting (HTS) transformer which was sponsored by the National Grid Company. The paper presents an outstanding research and unique experimental results which addresses the novel and significant use of magnetic flux diverters in HTS transformers for reduced losses and improved performance. It demonstrated experimentally the importance of shaping the leakage magnetic field in the end region of the winding to reduce the influence of the field component perpendicular to the broad face of the tape. Cited 8 times (3 times in 2005, 2 times in 2003, 3 times in 2002). Grade 4 |
| Status: | Published |
| Contact Email Address: | maitham1@mech.soton.ac.uk |
| URI: | http://eprints.soton.ac.uk/id/eprint/21466 |
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