Piezoelectric transformer type high-voltage power apparatus...

Details Piezoelectric transformer type high-voltage power apparatus... Piezoelectric transformer type high-voltage power apparatus...

2008-07-08

2011-10-18

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S311000, C310S317000

Reexamination Certificate

active

08040018

ABSTRACT:
A piezoelectric transformer high-voltage power source apparatus, in which a driving voltage determined by a value of a driving frequency is applied to a piezoelectric transformer, and thereby an output voltage output by the piezoelectric transformer is provided to a load, includes: an output voltage detection unit to compare an output voltage with a reference voltage for controlling the output voltage, in order to maintain the output voltage at a predetermined value, and based on the comparison result, detecting the change of the output voltage as a digital value; and a driving control unit to perform driving control of the piezoelectric transformer according to the detected digital value. The high-voltage power source apparatus performs stable frequency control without falling into an abnormal oscillation or uncontrollable state, and a high-voltage can be output within a short rise time.

REFERENCES:
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patent: 5894184 (1999-04-01), Furuhashi et al.
patent: 6232728 (2001-05-01), Yamamoto et al.
patent: 7196475 (2007-03-01), Saito et al.
patent: 2004/0100592 (2004-05-01), Nakanishi et al.
patent: 2006/0220495 (2006-10-01), Yamaguchi et al.

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