Flow electrification characteristics of transformer oil were investigated by applying dc field and dc/ac composite field with both bare and covered electrode systems. In the case of bare electrode system, it was found that flow electrification characteristics were almost the same between positive and negative dc voltage application and negative charges were generated for both dc voltage and dc/ac composite voltage applications at high dc field region. In the case of covered electrode system, it was found that apparent flow electrification characteristics were different between positive and negative dc voltage applications.For the former, negative charges were generated at high dc field strength for both dc voltage and dc/ac composite voltage applications and for the latter, positive charges always generated for both dc voltage and dc/ac composite voltage applications. However, negative charge generation for positive voltage application was considered to be the influence of negative charge generation at bare part of covered electrode end and it was found that fundamental charge generation characteristics of covered electrode were an increase of positive charge generation by dc voltage application and positive charge generation was accelerated by superimposed ac field.
Flow electrification characteristics of transformer oil were investigated by applying dc and dc/ac composite fields to both bare and covered coaxial cylinder electrode systems. For the bare electrode system, flow electrification characteristics were almost the same between positive and negative dc voltage applications and negative charges were generated for both dc and dc/ac composite voltage applications at high dc fields. For the covered electrode system, the apparent flow electrification characteristics differed between positive and negative dc voltage applications. For the former, negative charges were generated at high dc fields for both dc and dc/ac composite voltage applications, and for the latter, positive charges were always generated for both voltage applications. However, negative charge generation for the positive voltage application was attributed to the influence of negative charge generation at the bare part of the covered electrode end; the fundamental charge generation characteristics of the covered electrode showed an increase of positive charge generation by dc voltage application, and positive charge generation was accelerated by a composite ac field. © 1999 Scripta Technica, Electr Eng Jpn, 130(2): 10‐17
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.