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http://dx.doi.org/10.9714/sac.2012.14.3.005

Analysis of Magnetic Field of Superconducting Winding According to the Changed Damper Thickness and Material  

Jeong, Jae-Sik (한양대학교 자동차공학과)
Lee, Sang-Ho (한양대학교 자동차공학과)
Hong, Jung-Pyo (한양대학교 미래자동차공학과)
Jo, Young-Sik (한국전기연구원)
Publication Information
Progress in Superconductivity and Cryogenics / v.14, no.3, 2012 , pp. 5-8 More about this Journal
Abstract
Superconducting windings of synchronous machine have to be operated in below the critical temperature, critical current density and critical magnetic field. If one of these characteristics does not satisfied, then the quench occurred in superconducting winding. Especially the armature current dramatically increased as the superconducting generator is short-circuited at the rated load condition and magnetic field in field winding increased due to the armature current. Therefore, damper is required to reduce the magnetic field of field winding which increases reliability of the superconducting generator. Damper dimension can be decided by time constant[1-2]. In this paper the basic model is high-power and low-speed superconducting generator. Damper time constant was calculated from the changed damper thickness and material. Magnetic flux of field coil at the basic model and changed damper time constant model is analyzed.
Keywords
superconductor; magnetic field; damper; damper time constant;
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  • Reference
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2 P.J. Lawrenson and T.J.E. Miller and J.M. Stephenson, "Damping and screening in the synchronous superconducting generator", Presented at PROC. IEE, Vol. 123, No. 8, AUGUST 1976.