Method of charging and discharging a piezoelectric element
AssigneeRobert Bosch GmbH
InventorsJohannes-Joerg Rueger, Udo Schulz
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Abstract
A method of charging or discharging a piezoelectric element, in which electric charge carriers are transported back and forth between a supply voltage of a direct voltage source and a piezoelectric element in order to transmit an elastic deflection of the piezoelectric element to an actuator. An actuating movement of the actuator is modified as a function of the level of a voltage being applied to the piezoelectric element, a reduction of the level of the applied voltage being compensated for by at least one additional transmission of electric charge carriers during a holding phase of the piezoelectric element.
Claims12
A method of one of charging and discharging a piezoelectric element, comprising:
- transporting electric charge carriers back and forth between a direct voltage source and a piezoelectric element in order to transmit an elastic deflection of the piezoelectric element to an actuator;
- modifying an actuating movement of the actuator as a function of a level of a voltage being applied to the piezoelectric element;
- and
- compensating for a reduction in the level of the applied voltage by at least one additional transmission of electric charge carriers during a holding phase of the piezoelectric element.
Dependencies are inferred from the claim text.