Patent · US Expired

Control circuit for an electromagnetic drive

US7403366B2 · kind B2 · utility

8Cited by

3References

14Claims

0Family size

Assignee

Moeller GmbH · DE

Inventors

Wilhelm Melchert · Hennef (Sieg), DE
Gerd Schmitz · Niederkassel, DE

Key dates

Filing date	Jul 26, 2003
Grant date	Jul 22, 2008
Priority date	—
Expiry date	Mar 22, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH01H47/04
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A control circuit for an electromagnetic drive includes first and second electronic switching elements, which in conjunction with a timing element subject the drive coil to a corresponding direct current in the starting phase or in the maintenance phase. A starting current and a maintenance current are provided by means of a current source that is controlled by the timing element and a direct current converter with downward control.

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