Title :
Carbonization Migration of Polymer Insulating Material Under Magnetic Field
Author :
Du, B.X. ; Chen, N. ; Gao, Yuan ; Zhang, Xiangjin
Author_Institution :
Sch. of Electr. Eng. & Autom., Tianjin Univ.
Abstract :
Phenolic resin laminate (PL) was employed to investigate the effect of magnetic field on migration rate of surface carbonization which is the primary reason for surface dielectric breakdown. A needle-plate electrode system was used and the distance between the electrodes was 4 mm. Experiments were carried out under dc pulse voltage with a frequency rang from 50 Hz to 100 Hz. The magnetic flux density was made from 120 mT to 240 mT. The migration of surface carbonization was observed by using a monocular video-zoom-microscope and calculated by measuring the length of carbonization path. Obtained results revealed that with increase of the magnetic flux density, the migration rate increased when EtimesB drifted into the surface but decreased when EtimesB drifted away from the surface
Keywords :
electric breakdown; laminates; magnetic flux; organic insulating materials; polymers; surface diffusion; surface discharges; surface treatment; 120 to 240 mT; 50 to 100 Hz; PL; magnetic field effect; magnetic flux density; monocular video-zoom-microscope; needle-plate electrode system; phenolic resin laminate; polymer insulating material; surface carbonization migration; surface dielectric breakdown; Dielectric materials; Dielectrics and electrical insulation; Electrodes; Magnetic fields; Magnetic flux density; Magnetic materials; Organic materials; Plastic insulation; Polymers; Resins;
Conference_Titel :
Properties and applications of Dielectric Materials, 2006. 8th International Conference on
Conference_Location :
Bali
Print_ISBN :
1-4244-0189-5
Electronic_ISBN :
1-4244-0190-9
DOI :
10.1109/ICPADM.2006.284205
