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Performance analysis of epoxy nanocomposites due to water droplet-initiated discharges under AC and DC voltages and localisation of discharges

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Volume 13 (2019) : Issue 1, Jan

IET Signal Processing

IET Wireless Sensor Systems

Micro & Nano Letters

The Journal of Engineering

Performance analysis of epoxy nanocomposites due to water droplet-initiated discharges under AC and DC voltages and localisation of discharges

Content Provider	IET Digital Library
Author	Mishra, Palash Desai, B. M. Ashwin Sarathi, Ramanujam Imai, Takahiro
Abstract	Corona inception voltage (CIV) due to water droplet sitting over the surface of epoxy nanocomposite material depends on supply voltage frequency, the conductivity of water droplet and the contact angle of the test specimens. The contact angle of the specimen and CIV due to water droplet has a direct correlation. It is realised that the CIV is high under negative DC and the least under AC voltages. Surface charge accumulation studies indicate that the accumulated charge and its decay time constant reduces in the damage-caused zone due to corona activity. The ultra-high frequency (UHF) signal generated due to water droplet-initiated corona activity has frequency content in the range of 0.8–1 GHz. The localisation of incipient discharges is demonstrated by using the non-iterative technique and the cross recurrence plot (CRP) technique is used to estimate the time difference of arrival (TDOA) of UHF signals generated due to water droplet-initiated discharge. Laser-induced breakdown spectroscopy (LIBS) depicts the elemental composition and reveals the difference in plasma temperature and threshold fluence between all the test specimens. In short, the performance of ion trapping particle filled epoxy nanocomposite performance is found to be best followed by titania filled epoxy nanocomposite and the base epoxy resin.
Starting Page	175
Ending Page	185
Page Count	11
ISSN	17518822
Volume Number	13
e-ISSN	17518830
Issue Number	Issue 2, Mar (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/13/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2018.5056
Journal	IET Science, Measurement & Technology
Publisher Date	2018-10-08
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Voltage Angle of Contact Contact Angle Corona Corona Inception Voltage Cross Recurrence Plot DC Voltage Decay Time Constant Dielectric Breakdown And Discharges Drops Elemental Composition Epoxy Insulation Epoxy Resin Filled Polymers Fluid Surface Energy Frequency 0.8 GHz to 1.0 GHz Gaseous Insulation, Breakdown And Discharges Glow And Corona Discharges Incipient Discharge Localisation Interface Tension Ion Trapping Particle Laser-induced Breakdown Spectroscopy LIBS Nanocomposite Noniterative Technique Optical (ultraviolet, Visible, Infrared) Plasma Diagnostic Technique Organic Insulation Plasma Diagnostics Plasma Temperature Plasma Temperature And Density Resins Static Electrification Supply Voltage Frequency Surface Charge Accumulation Surface Charging Surface Tension Threshold Fluence TiO2 Titania Filled Epoxy Nanocomposite Ultrahigh Frequency Signal Water Droplet-initiated Corona Activity Water Droplet-initiated Discharges
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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