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Fabrication and Electrical Characteristics of a hexagon-type piezoelectric transformer

육각형 압전변압기의 제조 및 전기적 출력 특성

  • Published : 2003.09.01

Abstract

In this paper, a hexagon-type piezoelectric transformer was investigated to increase the output power. The length of its side was 14mm and 17.5[mm], respectively. The piezoelectric ceramics was composed to PZT-PMN-PSN. This composition showed the characteristics which had an about 1200 of the mechanical Q-factor, 0.55 of the electromechanical coupling coefficient, 320 x 10$\^$-12/ C/N of the piezoelectric constant d$\sub$33/, 0.3% of the dissipation factor, etc. The voltage step-up ratio increased with increasing the load resistance, Rt., so it reached 80 with R$\sub$L/ of l[M$\Omega$] and was proportion to the length of side of the hexagon-type piezoelectric transformer.

본 연구에서는 풀력측 전극비를 보다 증가시킬 목적으로 새로운 형상인 육각형 압전변압기를 제작하여 전극 패턴을 설계하고, 전기적 출력 특성을 검토하였다. 이 때 육각형 압전변압기의 한변의 길이가 각각 14[mm]와 17.5[mm]로 하였으며, 압전변압기에 적용된 세라믹의 성분계는 PZT-PMN-PSN이었으며, 기계적 품질계수가 1200, 전기기계결합계수는 55%, 압전정수 $d_{33}$은 320${\times}$$10^{-l2}$C/N, 손실계수는 0.3%이었다. 부하저항의 증가에 따라 승압비는 증가하였으며, 육각형 압전변압기의 한 변의 길이가 증가함에 따라서도 증가하는 경향을 보였다. 최대 효율은 10∼20[M$\Omega$]근처에서 약 93%가 얻어졌다.다.다.

Keywords

References

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