Method and circuitry to control the deflection of a piezoelectric element

A piezoelectric tuning element for precisely controlling the distance between two components has a pair of electrodes each located at opposing sides thereof and is supplied with a constant current over a predetermined first time interval establishing a charge of one polarity which is then completely...

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Bibliographische Detailangaben
Hauptverfasser:	KNOLL, DIETER BERTRAM
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT CONTROLLING DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER MACHINE TOOLS MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PHYSICS REGULATING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES TRANSPORTING
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Beschreibung
Zusammenfassung:	A piezoelectric tuning element for precisely controlling the distance between two components has a pair of electrodes each located at opposing sides thereof and is supplied with a constant current over a predetermined first time interval establishing a charge of one polarity which is then completely withdrawn during a second time interval. Thereby a linearly increasing deflection from a predetermined initial value to a second precisely predetermined deflection value is caused during the first time interval, and a return to the initial value is achieved precisely, without appreciable hysteresis at the end of the second time interval.