Title :
Detection of high field AC conduction loss current in polymeric insulating materials
Author :
Tokoro, T. ; Nagao, M. ; Kosaki, M.
Author_Institution :
Gifu Nat. Coll. of Technol., Japan
Abstract :
A novel method for the detection of high-field AC conduction loss current in polymeric insulating materials is developed. It uses the unbalanced operation of a current-comparator-type high-field tan-δ-capacitance bridge and the deconvolution technique for signal processing. Examples of the transfer function of this detection system for different amplifier gain levels are shown. Under certain conditions, the high-field AC conduction current of LDPE (low-density polyethylene) film evaluated with this method contains both an in-phase fundamental sine wave component which correlates with tan δ and harmonics caused by the nonlinear electric-field dependence of the conduction current. In epoxy resin, however, only the fundamental sinusoidal wave component of the dissipation current is detected
Keywords :
dielectric loss measurement; electric current measurement; high field effects; insulation testing; organic insulating materials; polymers; LDPE; current-comparator-type; deconvolution technique; dissipation current; epoxy resin; fundamental sinusoidal wave component; harmonics; high field AC conduction loss current; high-field tan-δ-capacitance bridge; in-phase fundamental sine wave component; nonlinear electric-field dependence; polymeric insulating materials; signal processing; transfer function; unbalanced operation; Bridges; Conducting materials; Conductive films; Deconvolution; Plastic films; Plastic insulation; Polyethylene; Polymers; Signal processing; Transfer functions;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1989., Proceedings of the 3rd International Conference on
Conference_Location :
Trondheim
DOI :
10.1109/ICSD.1989.69198
