Method and device for driving a capacitive control element

Details Method and device for driving a capacitive control element Method and device for driving a capacitive control element

1999-06-18

2000-09-19

Ramirez, Nestor

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

061217158

ABSTRACT:
A capacitive control element is charged with a defined charging voltage Uc. From a stored mapping KF, the instantaneous control element capacitance Cp is determined from the charge voltage Uc and a control element voltage Up. In addition, energy E supplied to the control element is determined from the charge voltage Uc and the control element capacitance Cp. According to a deviation of energy E fed to the control element from a stipulated amount of energy Ev, the charge voltage Uc for a next drive process of the control element is regulated. The same process occurs for additional control elements.

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Japanese Patent Abstract No. 06140682 (Motoyuki), dated May 20, 1994.

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