Patent · US Expired

Method and device for driving a capacitive control element

US6121715A · kind A · utility

13Cited by

10References

12Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Christian Hoffmann · Leonberg, DE
Hellmut Freudenberg · Bad Abbach, DE
Hartmut Gerken · Nittendorf, DE
Martin Hecker · Laimerstadt, DE
Richard Pirkl · Regensburg, DE

Key dates

Filing date	Jun 18, 1999
Grant date	Sep 19, 2000
Priority date	—
Expiry date	Jun 18, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH02N2/067
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.