Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Fabrication and Characteristics of Ring-Dot type Piezoelectric Transformer

Ring-dot형 감압형 압전변환기의 제작과 특성

  • 남성진 (영남대학교 나노시스템공학과) ;
  • 이영민 (영남대학교 나노시스템공학과) ;
  • 남효덕 (영남대학교 전자정보공학과) ;
  • 손준호 (에스테크) ;
  • 이준형 (경북대학교 무기재료공학과)
  • Published : 2004.07.05
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Abstract

Voltage step-down characteristics in Ring/Dot type piezoelectric transformer were examined as a function of the area of input electrode when the area of output electrode is fixed. The effects of driving frequency and load resistance on the voltage step-down characteristics were also examined. Voltage gain was greatly dependent on the driving frequency and load resistance, and showed a maximum gain at resonance frequency of the step-down transformer. The frequency where the maximum output voltage appears increased about 0.2% as the load resistance increased from 10 to $150\Omega$. As the area of input electrode increased, the voltage gain and the efficiency of the transformer increased. Frequency dependence of efficiency of the step-down transformer revealed a similar tendency with the voltage gain curves. The maximum efficiency remarked 94% when the input voltage and the load resistance were 20 $V_{PP}$ and $120\Omega$, respectively.

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