The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
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The Characteristics of Piezoelectric Transformer for Driving CCFL

CCFL 구동용 압전 변압기의 특성

  • Jeong, Su-Hyun (Dept. of Electrical Engineering, Daewon Science College) ;
  • Lee, Jong-Sub (Dept. of Electric Engineering, Graduate School of Chungbuk National University) ;
  • Hong, Jong-Kuk (Dept. of Electric Engineering, Graduate School of Chungbuk National University) ;
  • Chae, Hong-In (Juseong College) ;
  • Yoon, Man-Soon (Juseong College) ;
  • Lim, Kee-Joe (Dept. of Electric Engineering, Chungbuk National University)
  • Published : 2000.05.01
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Abstract

In this paper, the characteristics of piezoelectric transformer is studied for driving CCFL(Cold Cathode Fluorescent Lamp). In order to investigate the effects of geometrical dimensions, λvibration-mode type piezoelectric transformers with different sizes in the length(l), width$(\omega)$ and thickness(t) are made of ceramics with PZT-PMWS compositions. The increases in temperature and aging effect are also measured in the transformer of PT-3 sample under the condition of operation continuously for 10 hrs. As the results of dimensional effects, the output power and voltage step-up ratio are largely affected by the ratio of length to thickness(l/t) rather than that of length to $width(l/\omega)$. The output power and step-up ratio are increased with increasing l/t. On case of PT-3, the output voltages are 510[Vrms] at 36[Vrms] in input voltage, $100[k\Omega]$ in load resistance. Temperature increases and variation of output voltages are $10[^{\circ}C]$ and less than 5[%], respectively.

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References

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