Diagnosis of Winding Conditions in High Temperature Superconducting Coils by Applying Poynting's Vector Method
| Autor: | H. Moribe, Akifumi Kawagoe, K. Kakiyama, Fumio Sumiyoshi |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Physics
superconducting coil Acoustics Physics::Medical Physics Superconducting magnet Superconducting magnetic energy storage Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Poynting's vector method quench monitoring Nuclear magnetic resonance Coil noise Electromagnetic coil Electric field Diagnosis Poynting vector Sensitivity (control systems) Electrical and Electronic Engineering |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 23:9000804-9000804 |
| ISSN: | 1558-2515 1051-8223 |
| DOI: | 10.1109/tasc.2013.2238575 |
| Popis: | We have proposed a new method for detecting unusual local conditions in a high-temperature superconducting coil. In this method, two kinds of pick up coils for measuring electric fields and magnetic fields are used to obtain Poynting's vectors around the coil. This is a noncontact method using pick-up coils around the vessel for cooling the coil. The method has the following benefits: safe detection, easy handling, high sensitivity, and high usability. The purpose of this paper is to clarify the relation of measured signals to the conditions of the windings. When a temperature rise has been produced locally in the Bi-2223 solenoidal coil, Poynting's vectors around the coil and the temperature of windings were measured. It was found that the measured signals rapidly decrease as the temperature of the winding achieved a critical level, making this a reliable method to estimate the conditions in the windings. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|