Study on the Measurement of Volt Ampere Characteristics of Silicon Carbide Stress Grading Materials

SHUANG LIU, ZHI YANG, XUE-ZHONG LIU, HAO-FAN LIN, PING LIU

Abstract


In order to optimize the design of the stress grading structure for the end-windings of high voltage (HV) electric machines, a suitable and convenient method for accurate measurement of Volt ampere characteristics became significant. In this paper, the volt ampere characteristics of the Stress grading coating (SGC) before and after impregnation were studied. The experiment found that the resistivity of SGC after the immersion paint was significantly improved. There were two orders of magnitude differences in resistivity before and after impregnation. For the sake of obtaining more accurate volt ampere characteristics of SGC after impregnation, a new method of pre electrode was proposed for the first time in this paper. The results showed that the current obtained by the method with pre electrode was larger and more accurate.

Keywords


Silicon carbide (SiC), Stress grading coating (SGC), Volt ampere characteristics, Measurement, Preset electrode.Text


DOI
10.12783/dteees/peems2019/33964

Full Text:

PDF

Refbacks

  • There are currently no refbacks.