전극분할형 압전변압기의 특성에 관한 연구

A Study on the Characteristics of a Piezoelectric Ceramic Transformer with divided Electrodes

  • 허두오 (건국대학교 공과대학 전기공학과) ;
  • 강태구 (건국대학교 공과대학 전기공학과) ;
  • 조철환 (건국대학교 공과대학 전기공학과) ;
  • 이해민 (건국대학교 공과대학 전기공학과) ;
  • 안형근 (건국대학교 공과대학 전기공학과) ;
  • 한득영 (건국대학교 공과대학 전기공학과)
  • 발행 : 1996.11.01

초록

This paper describes a type of piezoelectric transformer with improved design principles. It consists of a thin rectangular piezoelectric ceramic plate having two input electrodes and one output electrode. The length of each input and output electrode is nearly one third of that of piezoelectric transformer itself. In the driving section, the ceramic plate is poled in the thickness direction reversely with each other, and has electrodes on both main faces. The electric input near its fundamental resonance frequency is applied to the driving section in parallel and the output voltage from the generating section is connected to the resistor load. Its equivalent circuit is derived from the Mason\`s model. The frequency characteristics near the resonance frequency under no load have been investigated. Moreover, using this piezoelectric transformer we measured the LCD backlight characteristics.

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