Abstract
Effects of relative angle between magnetic field and electrical field on insulation breakdown of PWB were investigated. The changes in number of drops to breakdown are dependent on relative angle under magnetic field as following.
(1) An angle as 0, 180 and 360 degree, the number of drops to insulation breakdown did not change at the relative angle, but the insulation breakdown became easy to progress as increasing density of magnetic field at the direction angle. In the case of 90 degree, as the density of magnetic field increased the number of drops to breakdown increased at both relative angle and direction angle. And, in the case of 270 degree, as the density of magnetic field increased the number of drops to breakdown decreased at both relative and direction angle.
(2) The relation of number between the drops to breakdown to scintillation discharge energy levels was more fully understood from the results of our wavelet analysis. The scintillation discharge levels under relative and direction angle at 270 degree was shown to increase over time compare with 0 and 90 degree.
