Pb[(Mn_1/3Sb_2/3)_0.05Zr_0.475]O₃세라믹스를 이용한 변형 Ring/Dot형 압전세라믹 변압기의 감압특성 = Voltage Step-down Characteristics of Modified Ring/Dot-type Piezoelectric Transformer using Pb[(Mn_1/3Sb_2/3)_0.05Zr_0.475]O₃ Ceramics

다국어 초록 (Multilingual 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 cutout voltage appears increased about 0.2％ as the load resistance increased from 10 to 150 Ω. 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 Vpp and 120 Ω, respectively.