Method of operating piezoelectric transformer and operating circ

Details Method of operating piezoelectric transformer and operating circ Method of operating piezoelectric transformer and operating circ

1998-11-23

2000-10-10

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

Using semiconductor-type converter

310318, H02M 7537

Patent

active

061308331

ABSTRACT:
A power source 1 and an operating circuit 4 incorporating a waveform generating circuit 5 for synthesizing composite wave W obtained by synthesizing a sine wave of primary oscillations and a sine wave of secondary oscillations of a Rosen-type piezoelectric transformer and an amplifying circuit 6 raises the voltage of the composite wave so that composite wave W' (having a waveform similar to that of W) is, as input voltage V.sub.in, supplied to the Rosen-type piezoelectric transformer PT. Thus, output voltage V.sub.out having greater output electric power and higher transmitting efficiencies as compared with output voltage which can be obtained from a conventional structure in which input voltage in a single oscillation mode is employed can be produced to load resistor R.sub.o.

REFERENCES:
patent: 5548189 (1996-08-01), Williams
patent: 5739622 (1998-04-01), Zaitsu
patent: 5796213 (1998-08-01), Kawasaki
patent: 5854543 (1998-12-01), Satoh et al.
patent: 5859489 (1999-01-01), Shimada
Text C-1-2-7, Symposium of Switching Power Source (sponsored by Japan Management Association), 1997, pages 12.

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