• 제목/요약/키워드: Multilayer piezoelectric transformer

검색결과 51건 처리시간 0.028초

저온소결 PMN-PNN-PZT 세라믹스를 이용한 고출력 강압용 적층 압전변압기의 전기적 특성 (Electrical Properties of High Power Step Down Multilayer Piezoelectric Transformer using Low Temperature Sintering PMN-PNN-PZT Ceramics)

  • 류주현;김국진;백동수;윤현상
    • 한국전기전자재료학회논문지
    • /
    • 제20권4호
    • /
    • pp.332-336
    • /
    • 2007
  • In this study, multilayer piezoelectric transformer was manufactured using the PMN-PNN-PZT ceramic and then the electrical characteristics were investigated according to the variations of frequency and load resistance. The voltage step-up ratio of multilayer piezoelectric transformer showed the maximum value at the vicinity of 75 kHz and increased according to the increase of load resistance. When the output impedance coincided with the load resistance, the multilayer piezoelectric transformer showed the temperature rise of less than $20^{\circ}C$ at the output power of 20 W. As the results, the multilayer piezoelectric transformer manufactured at low co-firing temperature of $940^{\circ}C$ using PMN-PNN-PZT ceramics could be stably driven as the step-down transformers.

저온소결 (Pb,Ca,Sr,)(Ti,Mn,Sb)O3 세라믹스를 이용한 두께진동모드 적층 압전 변압기의 전기적 특성 (Electrical Properties of Thickness-Vibration-Mode Multilayer Piezoelectric Transformer using Low Temperature Sintering (Pb,Ca,Sr,)(Ti,Mn,Sb)O3 Ceramics)

  • 류주현;유경진;김도형
    • 한국전기전자재료학회논문지
    • /
    • 제20권11호
    • /
    • pp.948-952
    • /
    • 2007
  • In this study, a low temperature sintering multilayer piezoelectric transformer for a DC-DC converter was manufactured using $(Pb,Ca,Sr,)(Ti,Mn,Sb)O_3$ ceramics. Its electrical properties were investigated according to the variation in frequency and load resistance. The voltage step-up ratio of the multilayer piezoelectric transformer showed a maximum value at a resonant frequency of input part and increased with an increase of load resistance. The efficiency of the multilayer piezoelectric transformer showed the highest value at a load resistance of 17 $\Omega$. The output power was increased with increasing input voltage. Temperature increase of the multilayer piezoelectric transformer was increased with the increase of output power. At the load resistance of 17 $\Omega$, the multilayer piezoelectric transformer showed the temperature rises of about $20^{\circ}C$ at the output power of 18 W, and stable driving characteristics.

Rosen type 적층형 압전변압기의 제작 및 전기적 특성 (Fabrication and electrical properties of Rosen-type multilayer piezoelectric transformer)

  • 이창배;윤중락;이경민;우병철
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2007년도 추계학술대회 논문집
    • /
    • pp.250-250
    • /
    • 2007
  • In this paper, multilayer piezoelectric transformer for high power is presented. This piezoelectric transformer, with a multilayered construction in the thickness direction, was fabricated at the sintering temperature of $1055^{\circ}C$. The electrical properties of multilayer piezoelectric transformer as a function of Internal electrode structure, with same size, were investigated. Also, the multilayer piezoelectric transformer with different layer number of 5, 10, 15 layers, were investigated.

  • PDF

PAN-PZT계 세라믹스를 이용한 적층형압전변압기의 특성 (Characteristics of A Multilayer Piezoelectric Transformer Using PAN-PZT Ceramics)

  • 박타리;이동균;최지원;신용덕;김현재;고태국;윤석진
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2002년도 하계학술대회 논문집
    • /
    • pp.143-146
    • /
    • 2002
  • The characteristics of a multilayer piezoelectric transformer were investigated using 0.05Pb(A $l_{0.5}$N $b_{0.5}$) $O_3$-0.95Pb(Z $r_{0.52}$ $Ti_{0.48}$) $O_3$+0.9wt%N $b_2$ $O_{5}$+0.5wt%Mn $O_2$+0.04wt% $V_2$ $O_{5}$ ceramics. The multilayer piezoelectric trans formers were developed for voltage step-up. The multilayer ceramic technology was applied in piezoelectric transformer. The electrical characteristics of the piezoelectric transformer (33x8.5x1mm) has the efficiency of above 85%, step-up ratio of 70 under the 130 kΩ load, and driving frequency of 93.5kHz, respectively.ctively.y.y.

  • PDF

PZN-PMN-PZT 세라믹스를 이용한 적층 압전변압기의 전기적 특성 (The Electrical Properties of Multilayer Piezoelectric Transformer using PZN-PMN-PZT ceramics)

  • 김국진;이창배;류주현;백동수;윤현상
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
    • /
    • pp.301-303
    • /
    • 2006
  • In this study, multilayer piezoelectric transformer were manufactured using the PZN-PMN-PZT ceramic and then the electrical characteristics were investigated. The voltage step-up ratio of multilayer piezoelectric transformer showed the maximum value in the vicinity of 78.16kHz and increased according to the increase of load resistance. When the output impedance coincided with the load resistance, piezoelectric transformer showed the temperature increase of about $20^{\circ}C$ at the output power of 12W. The results, the multilayer transformer manufactured using the low temperature sintered PZN-PMN-PZT ceramics can be stably driven for step-up transformers.

  • PDF

AC-adapter를 위한 적층형 압전트랜스포머의 설계 및 유한요소해석 (Design and FEM Analysis of Multilayer Piezoelectric Transformer for AC-adapter)

  • 정현호
    • 한국공작기계학회:학술대회논문집
    • /
    • 한국공작기계학회 2000년도 춘계학술대회논문집 - 한국공작기계학회
    • /
    • pp.529-533
    • /
    • 2000
  • This paper present a new sort of multilayer piezoelectric ceramic transformer for AC-adapt. This piezoelectric transformer operates n the second thickness extensional vibration mode. The output voltage of the multilayer piezoelectric transformer was simulated using ANSYS. As results, the maximum stress appeared at the two points where one is the middle of input and the other is middle of output side in Second thickness extensional vibration mode. And output voltage was inversely decreased by increasing number of output layers.

  • PDF

(PbCaSr)(TiMnSb)$O_3$ 세라믹스를 이용한 두께진동모드 적층 압전 변압기의 전기적 특성 (The Electrical Properties of Thickness Vibration Mode Multilayer Piezoelectric Transformer using (PbCaSr)(TiMnSb)$O_3$ Ceramics)

  • 유경진;류주현;정영호
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2006년도 추계학술대회 논문집 Vol.19
    • /
    • pp.196-197
    • /
    • 2006
  • In this study, low temperature sintering multilayer piezoelectric transformer for DC-DC converter were manufactured using (PbCaSr)Ti(MnSb)$O_3$ ceramics and thin their electrical properties were investigated according to the vanation of frequency and load resistance. The voltage step-up ratio of multilayer piezoelectric transformer showed the maximum value m the vicinity of 1.3MHz and increased according to the increase of load resistance. When the output impedance coincided with the load resistance, the piezoelectric transformer showed the temperature rise of about $21^{\circ}C$ under the output power of 6W.

  • PDF

Modeling and Investigation of Multilayer Piezoelectric Transformer with a Central Hole for Heat Dissipation

  • Thang, Vo Viet;Kim, In-Sung;Jeong, Soon-Jong;Kim, Min-Soo;Song, Jae-Sung
    • Journal of Electrical Engineering and Technology
    • /
    • 제6권5호
    • /
    • pp.671-676
    • /
    • 2011
  • A multilayer square-type piezoelectric transformer with a hole at the center was investigated in this paper. Temperature distribution at the center was improved by using this construction, therefore increasing input voltage and output power. This model was simulated and investigated successfully by applying a finite element method (FEM) in ATILA software. An optimized structure was then fabricated, examined, and compared to the simulation results. Electrical characteristics, including output voltage and output power, were measured at different load resistances. The temperature distribution was also monitored using an infrared camera. The piezoelectric transformer operated at first radial vibration mode and a frequency area of 70 kHz. The 16 W output power was achieved in a three-layer transformer with 96% efficiency and $20^{\circ}C$ temperature rise from room temperature under 115 V driving voltage, 100 ${\Omega}$ matching load, $28{\times}28{\times}1.8mm$ size, and 2 mm hole diameter. With these square-type multilayer piezoelectric transformers, the temperature was concentrated around the hole and lower than in piezoelectric transformers without a hole.

압전특성이 강압용 적층 압전변압기의 출력특성에 미치는 영향 (The Effect of Piezoelectric Properties on the Output Properties of Step-down Multilayer Piezoelectric Transformer)

  • 김국진;류주현;백동수;윤현상
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2006년도 추계학술대회 논문집 Vol.19
    • /
    • pp.225-227
    • /
    • 2006
  • Multilayer step down piezoelectric transformers were manufactured using PZN-PMN-PZT and PMN-PNN-PZT ceramics respectively. Sintering temperature of the ceramics was $940^{\circ}C$. And then. their electrical properties were investigated according to the variations of frequency and load resistance. The voltage step-up ratio of multilayer piezoelectric transformer showed the maximum values in the vicinity of 69 and 71kHz, respectively. At the load resistance of $100{\Omega}$, the piezoelectric transformers showed the temperature rises of about 21 and $18^{\circ}C$ at the output power of 15W and 18W, respectively. At the transformer with high effective electromechanical coupling factor($k_{eff}$), lower temperature increase was appeared.

  • PDF

PMN-PZN-PZT 세라믹스를 이용한 적층형 압전변압기의 전기적 특성 (Electrical Properties of Multilayer Piezoelectric Transformer using PMN-PZN-PZT Ceramics)

  • 이창배;류주현;백동수;강진규;조봉희;이성일
    • 한국전기전자재료학회논문지
    • /
    • 제19권7호
    • /
    • pp.655-661
    • /
    • 2006
  • Dielectric and piezoelectric properties of PMN-PZT ceramics with a high mechanical quality factor$(Q_m)$ and a low temperature sintering temperature were investigated as a function of PZN substitution in order to develop multilayer piezoelectric transformer for AC-DC converter. Multilayer piezoelectric transformers were subsequently manufactured using the PMN-PZN-PZT ceramic offering the optimal behavior and then the electrical performance were invetigated. At the sintering temperature of $940^{\circ}C$, density, electromechanical coupling factor$(k_p)$, mechanical qualify factor$(Q_m)$ and dielectric constant$(\varepsilon_r)$ of 8 mol% PZN substituted specimen were $7.73g/cm^3$, 0.524, 1573 and 1455, respectively. The PZN substitution caused a increase in the dielectric constant and the electromechnical coupling factor. The voltage step-up ratio of multilayer piezoelectric transformer showed the maximum value at near the resonant frequency of 76.55 kHz and increased according to the increase of load resistance. The multilayer piezoelectric transformer with the output impedance coincided with the load resistance showed the temperature increase of less than $20^{\circ}C$ at the output power of 10 W. Based on the results, the manufactured multilayer transformer using the low temperature sintered PMN-PZN-PZT ceramics can be stably driven for both step-up and down transformers.