Patent ID: 6825591
Filing Date: 2004-11-30
Classification: F04B,H01L

Abstract:
A method for controlling a piezoelectric drive wherein:a required voltage to be applied to a piezoactuator (10) for a desired deflection of the piezoactuator (10) is determined by means of the deflection characteristic curve of the piezoactuator (10), the piezoactuator (10) is supplied with a current by means of a current source (20, 30), the voltage is measured on the piezoactuator (10) while the piezoactuator (10) is being supplied with the current from the current source (20, 30), the voltage measured is compared to the voltage required, and the supply of the piezoactuator (10) with the current from the current source (20, 30) is turned off once the required voltage is reached, wherein the piezoactuator (10) acts on a deformable displacement wall of a displacement chamber for proportioning fluids and the deflection of the piezoactuator (10) for a desired proportioning volume of the fluid is determined by means of a proportioning characteristic curve of the displacement chamber and the piezoactuator (10) is controlled accordingly.