Surface Discharge Characteristics of a DC Corona Charged Ferroelectric Pellet Barrier

직류 코로나 하전된 강유전체구 층의 연면방전특성

  • 금상택 (경북대학 전기공학과 대학원) ;
  • 이근택 (서라벌대학 전기과 겸임) ;
  • 문재덕 (경북대학 전자·전기공학부 정)
  • Published : 1999.05.01

Abstract

Surface corona discharge characteristics of a dc corona charged ferroelectric pellet barrier have been investigated experimentally. Electric charges stored on the surfaces of the ferroelectric pellets by a dc corona discharge provide partial electric fields on the surfaces of the ferroelectric pellets, which could generate surface corona discharges on the ferroelectric pellets. This system utilizes both the surface discharges on the ferroelectric pellet barrier and the corona discharge between corona tip and mesh electrode. Positive and negative dc voltages were applied to the tip to generate partial discharges, and corona currents were estimated to investigate the buildup charge on ferroelectric pellets as a function of the applied time and the charge relaxation time constants of ferroelectric pellets. As a result, in the case of the negative corona discharge with the ferroelectric pellet barrier, the mean corona current and ozone generation increase greatly, and the surface discharges on the ferroelectric pellets can be fenerated efficiently. It is also found that, charge relaxation time, dielectric constants offerroelectric pellets, polarity of applied voltage and applied time affected to the surface discharges among the ferroelectric pellets.

Keywords

Surface Discharge;Ferroelectric Pellet;Buildup Charge;Charge Relaxation Time Constant;Dielectric Constant

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