Electronic control device for a piezo-ceramic bending...

Details Electronic control device for a piezo-ceramic bending... Electronic control device for a piezo-ceramic bending...

2007-08-11

2011-11-08

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S318000, C310S319000, C310S332000

Reexamination Certificate

active

08053949

ABSTRACT:
An electronic control device for a piezo-ceramic bending transducer designed as a trimorph, wherein a first voltage divider consisting of two resistor branches and powered by a first voltage source (Ust1) is provided, whose first resistor branch connects the first piezo-ceramic plate of the trimorph to its spacer layer. In addition, a second voltage divider is provided that consists of two resistor branches and the first resistor branch thereof connects the second piezo-ceramic plate of the trimorph to its spacer layer. The second resistor branch of the first voltage divider also forms the second resistor branch of the second voltage divider. Thus, by means of one voltage source, the one piezo-ceramic plate has an applied tensile stress and the other piezo-ceramic plate has an applied compressive stress, so that the flexural motion is reinforced by the two piezo-ceramic plates and thus only a small voltage has to be applied.

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patent: 7343802 (2008-03-01), Yamashita
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patent: WO 89/07345 (1989-08-01), None

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