DocumentCode :
2391924
Title :
Time dependence of electret potential during current limited charging on a small air gap and corona charging
Author :
Stark, Wolfgang ; Danz, Rudi
Author_Institution :
Fed. Inst. for Mater. Res. & Testing, Berlin, Germany
fYear :
1991
fDate :
25-27 Sep 1991
Firstpage :
261
Lastpage :
266
Abstract :
Charge build-up of electret foils (fluoroethylene propylene) at current-limited charging in a small parallel air gap and at corona charging was measured. Calculation of charge build-up is impossible because the effective charging resistance of the air gap depends on the actual electret charge itself. Therefore the effective charging resistance for both charging methods was determined experimentally. The results of these measurements were used to calculate charging time functions. A comparison with the measured results gives an indication of the influence of leakage currents through the foil. It is shown that increasing electret potential reduces the air gap potential and leads to an increasing charging resistance
Keywords :
corona; dielectric polarisation; dielectric thin films; electrets; foils; leakage currents; organic compounds; charge build-up; charging time functions; corona charging; current limited charging; effective charging resistance; electret; electret charge; electret foils; electret potential; fluoroethylene propylene; leakage currents; small air gap; time dependence; Charge measurement; Corona; Current measurement; Electrets; Electrical resistance measurement; Electrodes; Materials testing; Polymers; Time measurement; Voltage measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
Type :
conf
DOI :
10.1109/ISE.1991.167219
Filename :
167219
Link To Document :
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