Title :
Dielectric breakdown of printed circuit board under magnetic field
Author :
Du, B.X. ; Gao, Yu
Author_Institution :
Coll. of Electr. Eng. & Autom., Tianjin Univ., China
Abstract :
Epoxy resin laminate on which electric circuit of copper was printed as printed circuit board (PCB) has been employed to investigate the effects of magnetic field and low pressure. The experiment was carried out under electric and magnetic field by using a dc power, the angle between the magnetic field and the electrical field was 90 degree, the magnetic flux density (MFD) was 120 mT, 140 mT, 180 mT and 240 mT. The test sample was placed in a decompression chamber, which was made of glass vessel, and the pressure was reduced by a rotary pump. The discharge voltage was affected by both the magnetic field and low-pressure. The test results showed that the influence of magnetic field on discharge voltage depended on the pressures. Furthermore, the discharge currents were analyzed by a method of power spectral density.
Keywords :
copper; dielectric materials; electric field effects; insulation testing; laminates; magnetic field effects; magnetic flux; polymers; printed circuits; surface discharges; 120 mT; 140 mT; 180 mT; 240 mT; Cu; PCB; copper; dc power; decompression chamber; dielectric breakdown; discharge currents; discharge voltage; electric circuit; electric field; epoxy resin laminate; glass vessel; magnetic field effects; magnetic flux density; power spectral density; printed circuit board; rotary pump; test sample; Copper; Dielectric breakdown; Epoxy resins; Laminates; Magnetic circuits; Magnetic fields; Magnetic flux density; Printed circuits; Testing; Voltage;
Conference_Titel :
Electrical Insulating Materials, 2005. (ISEIM 2005). Proceedings of 2005 International Symposium on
Print_ISBN :
4-88686-063-X
DOI :
10.1109/ISEIM.2005.193549
