IEICE TRANSACTIONS on Fundamentals
Piezoelectric Ceramic Transformer for Power Supply Operating in Thickness Extensional Vibration Mode
Summary :
This paper presents a new sort of multilayer piezoelectric ceramic transformer for switching regulated power supplies. This piezoelectric transformer operates in the second thickness extensional vibration mode. Its resonant frequency is higher than 1 MHz. First, numerical simulation was implemented using a distributed constant electromechanical equivalent circuit method. It was calculated that this piezoelectric transformer, which has higher than 200 mechanical quality factor Qm, could work with higher than 90% efficiency and in more than 20-W/cm3 high power density. Second, a trially fabricated transformer, which is 15 mm long, 15 mm wide and 2.2 mm thick, was examined. Modified PbTiO3 family ceramics were used for the piezoelectric transformer material, because of the large anisotropy between electromechanical coupling factors kt and kp. Obtained results indicate that the piezoelectric transformer has good resonant characteristics, with little spurious vibration, and exhibits 16-W/cm3 power density with high efficiency at 2 MHz. Moreover, a switching regulated power supply, applying the piezoelectric ceramic transformer, was built and examined.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E77-A No.12 pp.2098-2105
- Publication Date
- 1994/12/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- PAPER
- Category
- Ultrasonics
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Osamu OHNISHI, Yasuhiro SASAKI, Toshiyuki ZAITSU, Hiromi KISHIE, Takeshi INOUE, "Piezoelectric Ceramic Transformer for Power Supply Operating in Thickness Extensional Vibration Mode" in IEICE TRANSACTIONS on Fundamentals,
vol. E77-A, no. 12, pp. 2098-2105, December 1994, doi: .
Abstract: This paper presents a new sort of multilayer piezoelectric ceramic transformer for switching regulated power supplies. This piezoelectric transformer operates in the second thickness extensional vibration mode. Its resonant frequency is higher than 1 MHz. First, numerical simulation was implemented using a distributed constant electromechanical equivalent circuit method. It was calculated that this piezoelectric transformer, which has higher than 200 mechanical quality factor Qm, could work with higher than 90% efficiency and in more than 20-W/cm3 high power density. Second, a trially fabricated transformer, which is 15 mm long, 15 mm wide and 2.2 mm thick, was examined. Modified PbTiO3 family ceramics were used for the piezoelectric transformer material, because of the large anisotropy between electromechanical coupling factors kt and kp. Obtained results indicate that the piezoelectric transformer has good resonant characteristics, with little spurious vibration, and exhibits 16-W/cm3 power density with high efficiency at 2 MHz. Moreover, a switching regulated power supply, applying the piezoelectric ceramic transformer, was built and examined.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e77-a_12_2098/_p
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@ARTICLE{e77-a_12_2098,
author={Osamu OHNISHI, Yasuhiro SASAKI, Toshiyuki ZAITSU, Hiromi KISHIE, Takeshi INOUE, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Piezoelectric Ceramic Transformer for Power Supply Operating in Thickness Extensional Vibration Mode},
year={1994},
volume={E77-A},
number={12},
pages={2098-2105},
abstract={This paper presents a new sort of multilayer piezoelectric ceramic transformer for switching regulated power supplies. This piezoelectric transformer operates in the second thickness extensional vibration mode. Its resonant frequency is higher than 1 MHz. First, numerical simulation was implemented using a distributed constant electromechanical equivalent circuit method. It was calculated that this piezoelectric transformer, which has higher than 200 mechanical quality factor Qm, could work with higher than 90% efficiency and in more than 20-W/cm3 high power density. Second, a trially fabricated transformer, which is 15 mm long, 15 mm wide and 2.2 mm thick, was examined. Modified PbTiO3 family ceramics were used for the piezoelectric transformer material, because of the large anisotropy between electromechanical coupling factors kt and kp. Obtained results indicate that the piezoelectric transformer has good resonant characteristics, with little spurious vibration, and exhibits 16-W/cm3 power density with high efficiency at 2 MHz. Moreover, a switching regulated power supply, applying the piezoelectric ceramic transformer, was built and examined.},
keywords={},
doi={},
ISSN={},
month={December},}
Copy
TY - JOUR
TI - Piezoelectric Ceramic Transformer for Power Supply Operating in Thickness Extensional Vibration Mode
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2098
EP - 2105
AU - Osamu OHNISHI
AU - Yasuhiro SASAKI
AU - Toshiyuki ZAITSU
AU - Hiromi KISHIE
AU - Takeshi INOUE
PY - 1994
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E77-A
IS - 12
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - December 1994
AB - This paper presents a new sort of multilayer piezoelectric ceramic transformer for switching regulated power supplies. This piezoelectric transformer operates in the second thickness extensional vibration mode. Its resonant frequency is higher than 1 MHz. First, numerical simulation was implemented using a distributed constant electromechanical equivalent circuit method. It was calculated that this piezoelectric transformer, which has higher than 200 mechanical quality factor Qm, could work with higher than 90% efficiency and in more than 20-W/cm3 high power density. Second, a trially fabricated transformer, which is 15 mm long, 15 mm wide and 2.2 mm thick, was examined. Modified PbTiO3 family ceramics were used for the piezoelectric transformer material, because of the large anisotropy between electromechanical coupling factors kt and kp. Obtained results indicate that the piezoelectric transformer has good resonant characteristics, with little spurious vibration, and exhibits 16-W/cm3 power density with high efficiency at 2 MHz. Moreover, a switching regulated power supply, applying the piezoelectric ceramic transformer, was built and examined.
ER -
English
