Patent · US Expired

Device for stabilizing the voltage of a single- or multi-phase a-c network

US4531086A · kind A · utility

1Cited by

1References

3Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Eberhard Schmid · Dormitz, DE
Robert Brehler · Erlangen, DE

Key dates

Filing date	Dec 2, 1982
Grant date	Jul 23, 1985
Priority date	—
Expiry date	Dec 2, 2002

Classification

Technology area (CPC G)Physics
CPC primaryG05F1/44
WIPO fieldControl
WIPO sectorInstruments

Abstract

A device for stabilizing the voltage between two conductors of an a-c network comprises a thyristor switching circuit and a choke element connected in series between the conductors and in parallel to a control circuit. The control circuit activates the thyristor circuit to connect the two conductors upon detecting equality between a predetermined reference value and a sum of two areas under a half-wave portion of the voltage-time curve of the two conductors, the first area being measured by an integrator and extending from the beginning of the half-wave period to a current instant and the second area being calculated by analog arithmetic components and extending from the current instant to the end of the half-wave period.

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