Dome-Shaped High Power Transformer for Driving A 55 W PL Lamp

2007 ◽  
Vol 124-126 ◽  
pp. 199-202
Author(s):  
Man Soon Yoon ◽  
H.K. Kim ◽  
Soon Chul Ur
Keyword(s):  
High Power ◽  
Power Efficiency ◽  
Vibration Mode ◽  
Power Transformer ◽  
Temperature Stability ◽  
Area Ratio ◽  
Powder Injection ◽  
Curvature Radius ◽  
Piezoelectric Transformer ◽  
Power Characteristics

Processing and properties of a dome-shaped piezoelectric transformer with a composition of 0.03Pb(Sb0.5Nb0.5)O3-0.03Pb(Mn1/3Nb2/3)O3-0.465PbTiO3-0.475PbZrO3 have been investigated. A dome-shaped sample was fabricated by powder injection molding. The dimension of the dome-shaped sample was a 28 mm in diameter and 2.1mm in thickness with a curvature radius of 18 mm. Finite element modeling for the complicated piezoelectric transformer was applied to simulate vibration mode in the sample. The high power characteristics of a dome-shaped piezoelectric transformer were examined by the lighting test for a 55W PL lamp. The 55W PL lamp was successfully driven by the dome-shaped piezoelectric transformer with sustaining efficiency higher than 98%. The transformer with ring/dot area ratio of 2.1 exhibited the maximum properties in terms of output power, efficiency and temperature stability.

Dome-Shaped High Power Transformer for Driving A 61 W T5 Lamp

2007 ◽  
Vol 544-545 ◽  
pp. 231-234
Author(s):  
Man Soon Yoon ◽  
Il Ho Kim ◽  
Soon Chul Ur
Keyword(s):  
High Power ◽  
Power Efficiency ◽  
Power Transformer ◽  
Temperature Stability ◽  
Powder Injection ◽  
Curvature Radius ◽  
Piezoelectric Transformer ◽  
Power Characteristics ◽  
Output Electrode ◽  
In Series

Processing and properties of a dome-shaped piezoelectric transformer with a composition of 0.03Pb(Sb0.5Nb0.5)O3-0.03Pb(Mn1/3Nb2/3)O3-0.465PbTiO3-0.475PbZrO3 have been investigated. A dome-shaped sample was fabricated by powder injection molding. The dimension of the domeshaped sample was a 28 mm in diameter and 2.1mm in thickness with a curvature radius of 18 mm. Finite element modeling for the complicated piezoelectric transformer was applied to simulate strains and vibration mode in the sample. The high power characteristics of a dome-shaped piezoelectric transformer were examined by the lighting test for 27 and 34 watt T5 circle lamps connected in series. The series connected T5 circle lamps were successfully driven by the domeshaped piezoelectric transformer with sustaining efficiency higher than 98.5%. The transformer with ring(input)/dot(output) electrode ratio of 2.5 exhibited the maximum properties in terms of output power, efficiency and temperature stability.

Energy Efficiency Alloy Design in PSN-PMN-PZT Ceramic System for Piezoelectric Transformer Application

2006 ◽  
Vol 510-511 ◽  
pp. 690-693 ◽  
Author(s):  
Y.G. Choi ◽  
Y.-J. Son ◽  
Joon Chul Kwon ◽  
K.W. Cho ◽  
Soon Young Kweon ◽  
...  
Keyword(s):  
High Power ◽  
Electromechanical Coupling ◽  
Power Transformer ◽  
Electromechanical Coupling Factor ◽  
Mechanical Quality Factor ◽  
Alloy Design ◽  
Laser Vibrometer ◽  
Ceramic System ◽  
Piezoelectric Transformer ◽  
Power Characteristics

To enhance high power characteristics for piezoelectric transformer, an alloy design approach in PZT base ceramic system was considered. Various Zr/Ti ratio compositions in 0.03Pb(Sb0.5Nb0.5)O3- 0.03Pb(Mn1/3Nb2/3)O3-(0.94-x)PbTiO3-xPbZrO3 (0.445x0.475 mol)[PSN - PMN - PZT] system were synthesized by the conventional bulk ceramic processing technique. To improve high power characteristics at their morphotropic phase boundary (MPB) composition of PSN-PMN-PZT system, various spectra of Zr/Ti ratio were systematically experimented, and their effects on the subsequent piezoelectric properties and dielectric properties for high power piezoelectric transformer application were investigated using an impedance analyzer and a laser vibrometer. Microstructure and phase information were characterized using X-ray diffractometer (XRD) and a scanning electron microscope (SEM). When the Zr/Ti ratios were 0.475/0.465, the mechanical quality factor and electromechanical coupling factor were shown to reach the maximum, indicating that this alloy design can be a feasible composition for high power transformer.

Electrical Characteristics of the Contour-Vibration-Mode Piezoelectric Transformer with Ring/Dot Electrode Area Ratio

2000 ◽  
Vol 39 (Part 1, No. 5A) ◽  
pp. 2680-2684 ◽  
Author(s):  
Juhyun Yoo ◽  
Kwanghee Yoon ◽  
Yongwoo Lee ◽  
Sungjae Suh ◽  
Jongsun Kim ◽  
...  
Keyword(s):  
Vibration Mode ◽  
Area Ratio ◽  
Electrical Characteristics ◽  
Piezoelectric Transformer ◽  
Electrode Area

Design Technique of High Power Efficiency LLC DC-DC Converters for Photovoltaic Cells

2018 ◽  
Vol 2 (1) ◽  
pp. 30
Author(s):  
Hisatsugu Kato ◽  
Yoichi Ishizuka ◽  
Kohei Ueda ◽  
Shotaro Karasuyama ◽  
Atsushi Ogasahara
Keyword(s):  
High Power ◽  
Power Efficiency ◽  
Photovoltaic Cells ◽  
Input Voltage ◽  
Design Technique ◽  
Load Range ◽  
Voltage Range ◽  
Simulation Results ◽  
Secondary Side ◽  
High Power Efficiency

This paper proposes a design technique of high power efficiency LLC DC-DC Converters for Photovoltaic Cells. The secondary side circuit and transformer fabrication of proposed circuit are optimized for overcoming the disadvantage of limited input voltage range and, realizing high power efficiency over a wide load range of LLC DC-DC converters. The optimized technique is described with theoretically and with simulation results. Some experimental results have been obtained with the prototype circuit designed for the 80 - 400 V input voltage range. The maximum power efficiency is 98 %.

An area-saving and high power efficiency charge pump built in a TFT-LCD driver IC

2009 ◽  
Vol 30 (9) ◽  
pp. 095015
Author(s):  
Zheng Ran ◽  
Wei Tingcun ◽  
Wang Jia ◽  
Gao Deyuan
Keyword(s):  
High Power ◽  
Power Efficiency ◽  
Charge Pump ◽  
Lcd Driver ◽  
High Power Efficiency

Multipoint Fiber-Optic Hot-Spot Sensing Network Integrated Into High Power Transformer for Continuous Monitoring

2008 ◽  
Vol 8 (7) ◽  
pp. 1264-1267 ◽  
Author(s):  
A. B. Lobo Ribeiro ◽  
N. F. Eira ◽  
J. M. Sousa ◽  
P. T. Guerreiro ◽  
J. R. Salcedo
Keyword(s):  
High Power ◽  
Continuous Monitoring ◽  
Fiber Optic ◽  
Power Transformer ◽  
Hot Spot
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