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Enhanced accuracy in dielectric response material characterization by air reference method

Xiangdong Xu (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Tord Bengtsson (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Jörgen Blennow (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Stanislaw Gubanski (Institutionen för material- och tillverkningsteknik, Högspänningsteknik)
IEEE transactions on dielectrics and electrical insulation (1070-9878). Vol. 20 (2013), 3, p. 913-321.
[Artikel, refereegranskad vetenskaplig]

Dielectric response measurements are an important technique to characterize dielectric materials. However, the electrode arrangements as well as the accuracy of the measurement setup limit the precision of this characterization, especially in case of solid dielectric materials. An air reference method and a contact-free electrode arrangement are described in this paper to enhance the dielectric characterization accuracy by avoiding problems introduced by electrode contacts. It is shown that by performing a calibration with electrode gap filled with air under the same conditions as the material is tested, the air reference method can improve the measurement accuracy substantially. This type of approach also eliminates the need of a detailed model of the analog measurement circuit. In conjunction with the contact-free measurements, the approach allows for avoiding complicated and time-consuming sample preparation procedures. The measurement methodology as well as the electrode arrangement and error increase estimates are presented and evaluated by using different dielectric response instruments and materials.

Nyckelord: Dielectric material characterization; dielectric frequency response; air reference method; shunt characterization; contact-free electrode arrangement



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Denna post skapades 2014-09-21. Senast ändrad 2015-07-28.
CPL Pubid: 203091

 

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Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Högspänningsteknik (2005-2017)

Ämnesområden

Energi
Materialvetenskap
Elkraftteknik
Materialteknik
Kompositmaterial och -teknik

Chalmers infrastruktur