Patent · US Expired

Current regulator for inductive loads

US4930040A · kind A · utility

13Cited by

3References

10Claims

0Family size

Assignee

WABCO Westinghouse Fahrzeugbremsen GmbH · DE

Inventors

Jurgen Binarsch · Haste, DE
Jurgen Bode · Kassel, DE
Lutz Danne · Ronnenberg, DE
Norbert Lissel · Barsinghausen, DE

Key dates

Filing date	Nov 14, 1988
Grant date	May 29, 1990
Priority date	—
Expiry date	Nov 14, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH02M3/158
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A current regulator for an inductive load especially for a coil of an electromagnetic solenoid valve. The current flow through the coil is regulated and compared by means of an operational amplifying nominal current value. The inductive load comparator is initially controlled by a first conductive diode. A second diode having a higher voltage rating than that of the first diode is rendered conductive whenever the nominal current value in an inductive coil decreases rapidly. The current regulator ensures that the magnetic energy in the inductive load remains unchanged when the nominal current value remains constant or changes in small amounts. When a rapid decrease of the coil current occurs, the second diode is rendered conductive.

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