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Piezoelectric transformers

Piezoelectric transformers

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© The Institution of Electrical Engineers
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These transformers are composite resonators made of two bonded piezoelectric parts. The vibration of one part, excited by an input electric voltage, induces an output voltage across the other part. The polarisation of the parts and the location of the electrodes are chosen so that the output voltage is more than 1000 times greater than the input voltage at the resonance frequency (≃80kHz or 160 kHz).

Inspec keywords: potential transformers; piezoelectric devices; crystal resonators

Other keywords: composite resonators; electrode location; bonded piezoelectric parts; polarisation; piezoelectric transformers; voltage transformer; resonance frequency

Subjects: Inductors and transformers; Piezoelectric and ferroelectric devices

References

    1. 1)
      • H.W. Katz . (1959) , Solid state magnetic and dielectric devices.
    2. 2)
      • W.P. Mason . (1948) , Electromechanical transducers and wave filters.
    3. 3)
      • `Vernitron Corporation', 3 736 446, 29 May 1973, US patent.
    4. 4)
      • Fujishima, S.: `Research and development of piezoelectric devices in Japan', IEEE Ultrasonics Symp. Proc., 1979, p. 128–132.
    5. 5)
      • Rosen, C.A.: `Ceramic transformers and filters', 1956, Ph.D. thesis, Syracuse University.
    6. 6)
      • Rosen, C.A.: 2 830 274, 1958, US patent.
    7. 7)
      • Siemens, A.G.: 24 33 389.9, 11 July 1974, German patent.
    8. 8)
      • : `Matsushita Corporation', 53 376 1967, 18 August 1967, Japanese patent.
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