NDLI: Effect of direct fluorination on partial discharge characteristics of polyimide film used as magnet wire insulation of generator

Content Provider	IET Digital Library
Author	Du, Boxue Li, Ang Liu, Yong Chao
Abstract	Polyimide (PI) film is widely used as the insulation between coils in generator, where partial discharge (PD) may occur to cause the insulation breakdown. Fluorination is considered as an effective method for surface modification of polymer materials to change its electrical properties. In this study, to study the effect of fluorination on the PD behaviour of PI film used as magnet wire insulation, the samples of magnet wire were covered by PI film. Samples were fluorinated in a reaction kettle using the F2/N2 mixture for different time. The non-fluorinated and fluorinated samples were subjected to partial charges under alternating electric field. A wideband detection system was used to detect PD waveform and record discharge phenomenon. The experimental results indicate that the direct fluorination has great effects on the surface charge accumulation and the decrease in PD intensity. The magnet wire fluorinated for 45 min shows the highest PD inception voltage, the lowest intensity of successive discharges and the smallest number of discharge pulses.
Starting Page	2251
Ending Page	2258
Page Count	8
ISSN	17518687
Volume Number	10
e-ISSN	17518695
Issue Number	Issue 9, Jun (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/10/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2015.1586
Journal	IET Generation, Transmission & Distribution
Publisher Date	2016-06-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Coils Dielectric Breakdown And Discharges Direct Fluorination Discharge Discharge Phenomenon Electric Field Electrical Property Insulation Insulation And Insulating Coatings Insulation Breakdown Magnet Wire Magnet Wire Insulation Partial Discharge Characteristic Partial Discharges PD Behaviour PD Waveform Polyimide Film Polymer Material Reaction Kettle Surface Charge Accumulation Surface Modification Time 45 Min Wideband Detection System Wires
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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