Space charge measurement using pulsed electroacoustic technique and signal recovery

Vazquez, A., Chen, G., Davies, A.E. and Bosch, R. (1999) Space charge measurement using pulsed electroacoustic technique and signal recovery. Journal of the European Ceramic Society, 19 (6-7), 1219-1222. (doi:10.1016/S0955-2219(98)00406-3).

Abstract

A recurrent problem in high-voltage engineering is the measurement of electric field inside a solid dielectric subjected to high voltages. The electric field can be modified if the space charge is present in the dielectric. The space charge brings an increase in local electric field that may have an effect on the performance of the material. Therefore, the design, longevity, and performance of dielectrics, used as either electrets or insulators, depend on the space charge and the electric field within them. Here a non-destructive experimental technique is considered which gives space charge and electric field distributions inside dielectric samples by using acoustic pulses. However, it is realised that the technique does not give a real representation of the space charge when dispersive materials are considered. This paper presents a frequency domain algorithm to recover the space charge distribution which enables the method to be applied to either dispersive or non-dispersive dielectric materials.

This record has no associated files available for download.

Contributors

Download statistics