Piezoelectric transformer drive method and drive circuit

Details Piezoelectric transformer drive method and drive circuit Piezoelectric transformer drive method and drive circuit

2004-05-28

2008-09-09

San Martin, J. A (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S359000

Reexamination Certificate

active

07423362

ABSTRACT:
A driving circuit is composed of a discontinuous rectangle wave oscillator and a lowpass filter. A discontinuous rectangle wave used herein is composed of voltages Vp, 0 and −Vp. Assuming one cycle is T, a discontinuous rectangle wave has such a configuration that a potential from a time 0 to a time ø is a potential 0, from the time ø to a time (T/6−ø) is a potential Vp, from the time (T/6−ø) to a time (T/3+ø) is a potential 0, . . . . Since the third harmonic wave is not included in the discontinuous waveform, the inductance of the lowpass filter can be reduced. Consequently, the lowpass filter may be omitted. Further, the amplitude of the fundamental wave can be changed by varying the phase difference ø.

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English Language Abstract of JP 8-032134.
English Language Abstract of 10-223388.
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English Language Abstract of JP 2003-033046.
English Language Abstract of JP 2000-116141.

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