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A surface potential measuring system was developed by utilizing Pockels sensor for measuring the potential distribution on the stress grading (SG) system of form wound motor coils. A Bi4Ge3O12 (BGO) Pockels crystal is put close to a measuring object and the capacitively-induced voltage on the end surface of the BGO crystal is measured by using Pockels effect of the crystal itself. The spatial resolution...
In measurements of impulse voltages by a Pockels sensor, oscillatory components have been observed in the tail part of optical signals of Pockels sensor. In this paper, oscillatory components of Bi4Ge3O12 (BGO) Pockels crystals in various shapes are investigated. The tested BGO crystals are rectangular solids, a cylinder solid and tapered quadratic solid. The oscillatory components are derived from...
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