scholarly journals Power enhancement of piezoelectric transformers for power supplies

2016 ◽  
Author(s):  
M. Ekhtiari ◽  
Zhe Zhang ◽  
A.R. Steenstrup ◽  
M.A.E. Andersen
Keyword(s):  
Power Supplies ◽  
Power Enhancement ◽  
Piezoelectric Transformers

scholarly journals Normalized statical analysis with frequency and load variation for the class-E converter based on piezoelectric transformers

2011 ◽  
Vol 22 (6) ◽  
pp. 573-584
Author(s):  
Raffael Engleitner ◽  
José Renes Pinheiro ◽  
Fábio Ecke Bisogno ◽  
Matthias Radecker ◽  
Yujia Yangy
Keyword(s):  
Duty Cycle ◽  
Power Supplies ◽  
Equivalent Model ◽  
Design Parameters ◽  
Frequency Variation ◽  
Switching Frequency ◽  
Load Variation ◽  
High Transformation ◽  
Piezoelectric Transformers ◽  
Class E

Piezoelectric transformers (PTs) allow the design of promising power supply applications, increasing efficiency, reducing size, facilitating the achievement of high transformation ratio, besides providing high immunity against electromagnetic noise. Due to the electrical equivalent model having resonant characteristics, some resonant topologies are used to build these power supplies, i.e. the Class-E converter. In order to make easier the analysis of high order converters, it's possible to use a normalized analysis method. The control of the Class-E converter using PTs is implemented through the switching frequency and duty cycle variation. The static gain is achieved though the switching frequency variation, while the duty cycle is adjusted with the purpose of achieving soft switching for different frequencies and loads. This paper shows a normalized analysis of this process, including a normalized frequency and load variation, without the need of design parameters. Experimental results for a 3W step-down converter are shown for a universal 85-260VAC input and out put voltage 6 V DC, to validate the proposed method.

Multilayered Piezoelectric Transformers for Small Power Supplies

2003 ◽  
Vol 42 (Part 1, No. 9B) ◽  
pp. 6128-6130 ◽  
Author(s):  
Tsutomu Endow ◽  
Seiji Hirose
Keyword(s):  
Power Supplies ◽  
Small Power ◽  
Piezoelectric Transformers

Power enhancement of piezoelectric transformers by adding heat transfer equipment

2012 ◽  
Vol 59 (10) ◽  
pp. 2129-2136 ◽  
Author(s):  
Yu-Hao Su ◽  
Yuan-Ping Liu ◽  
D. Vasic ◽  
Wen-Jong Wu ◽  
F. Costa ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Power Enhancement ◽  
Piezoelectric Transformers

A High-Voltage Terminal for a Field-Emission Gun

1972 ◽  
Vol 30 ◽  
pp. 428-429
Author(s):  
N. F. Ziegler
Keyword(s):  
Field Emission ◽  
High Voltage ◽  
Atmospheric Pressure ◽  
Power Supplies ◽  
High Coherence

A high-voltage terminal has been constructed for housing the various power supplies and metering circuits required by the field-emission gun (described elsewhere in these Proceedings) for the high-coherence microscope. The terminal is cylindrical in shape having a diameter of 14 inches and a length of 24 inches. It is completely enclosed by an aluminum housing filled with Freon-12 gas at essentially atmospheric pressure. The potential of the terminal relative to ground is, of course, equal to the accelerating potential of the microscope, which in the present case, is 150 kilovolts maximum.

Study on Improving Overall Efficiency of Front-end Power Supplies by Employing Method of Surge Energy Recycling

2012 ◽  
Vol 132 (7) ◽  
pp. 684-690 ◽  
Author(s):  
Toshikazu Okubo ◽  
Hiroyuki Shoji ◽  
Hideho Yamamura ◽  
Shinobu Irikura ◽  
Naoki Maru
Keyword(s):  
Power Supplies ◽  
Front End ◽  
Overall Efficiency
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