Patent · US Expired

Process for driving electric, current-controlled actuators

US5550449A · kind A · utility

7Cited by

6References

2Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Hans-Jurgen Ege · Ravensburg, DE
Gunther Horsak · Meckenbeuren, DE
Peter Wiggermann · Tettnang, DE

Key dates

Filing date	Feb 17, 1995
Grant date	Aug 27, 1996
Priority date	—
Expiry date	Feb 17, 2015

Classification

Technology area (CPC G)Physics
CPC primaryG05B2219/41118
WIPO fieldControl
WIPO sectorInstruments

Abstract

The process has an open control loop which detects the total current intensity of actuators and supplies it to a microprocessor. In a modulation mode the microprocessor successively generates at its output a modulated set value signal for each actuator, the set value signals lying below the response level of the process. The microprocessor then determines compensation values from the total current signal with which the set values of the actuators are corrected. The (regulating) speed of a control is thus combined with the accuracy of a regulation. The hardware expenditure (costs) is minimized thanks to the total current detection instead of the individual current detection.

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