NDLI: Power improvement of piezoelectric transformer based DC/DC converter

Content Provider	IEEE Xplore Digital Library
Author	Su, Y.H. Liu, Y.P. Vasic, D. Costa, F. Wu, W.J. Lee, C.K.
Copyright Year	2012
Description	Author affiliation: Department of Engineering Science & Ocean Engineering, National Taiwan University, Taipei, Taiwan (Su, Y.H.; Liu, Y.P.; Vasic, D.; Wu, W.J.; Lee, C.K.) \|\| SATIE, ENS Cachan, 94235, France (Costa, F.)
Abstract	In this paper a novel strategy to increase the power of piezoelectric transformer (PT) by using a cooling system is presented. A thermal pad is directly attached to a PT to dissipate the heat and enhance the power capacity. In a piezoelectric ceramic the heat increase quickly when the vibration velocity become too large. Therefore there is a limit in vibration velocity magnitude. To explain the relationship between the vibration velocity, the output current and the output power we propose a theoretical-phenomenological model based on nonlinear equivalent circuit. It will be shown that the vibration velocity and temperature influence the characteristics of the piezoelectric transformer significantly. A large vibration velocity may lead that the internally thermo-physical feedback loop of the PT enters into an unstable state. In this paper, a PT with the cooling system was implemented in a DC/DC converter. A zero voltage switching (ZVS) half-bridge is used to drive the PT and a full-wave rectifier is used to obtain the DC load voltage. As a result, the maximum power of the PT based DC/DC converter can be increased from 4.41 W to 10.2 W at specific temperature. The study comprises of a theoretical part and experimental proof-of-concept demonstration of the proposed system.
Starting Page	662
Ending Page	667
File Size	1726808
Page Count	6
File Format	PDF
ISBN	9781467324199
ISSN	1553572X
e-ISBN	9781467324212
e-ISBN	9781467324205
DOI	10.1109/IECON.2012.6388749
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-25
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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