Piezoelectric transformer with high power density and multiple outputs

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Piezoelectric transformer with high power density and multiple outputs

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Published

A new type of piezoelectric transformer which is capable of higher power density than currently known conventional types is presented. It is also capable of multiple voltage outputs. The transformer is made from lead zirconate titanate and is based on the k15 thickness shear vibration mode. This is the first reported case of such vibration mode being used to achieve high-power low-voltage piezoelectric transformers. Experimental characteristics of the prototype are reported. Such transformers are expected to find applications in automotive electronics and telecommunication power supplies.

Inspec keywords: lead compounds; transformers; zirconium compounds; piezoelectric devices; vibrations

Other keywords: PZT; piezoelectric transformer; shear vibration mode; PbZrO3TiO3; automotive electronics; multiple voltage outputs; telecommunication power supply; high power density

Subjects: Piezoelectric devices; Inductors and transformers

References

    1. 1)
      • N. Wakatsuki , M. Ueda , M. Satoh . Low-loss piezoelectric transformer using energy trapping of width vibration. Jpn J. Appl. Phys. 1 , 2317 - 2320
    2. 2)
      • Nakamura, K., Kumasaka, K.: `Lame-mode piezoelectric resonator and transformers using LiNbO', Proc. IEEE Ultrasonics Symp., 1995, Seattle, WA, USA, 2, p. 999–1002.
    3. 3)
    4. 4)
      • J.S. Yang , W. Zhang . A thickness-shear high voltage piezoelectric transformer. Int. J. Appl. Electromagn. Mech. , 105 - 121
http://iet.metastore.ingenta.com/content/journals/10.1049/el_20040523
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