Patent · US Expired

DC electromagnet

US6731191B2 · kind B2 · utility

6Cited by

2References

13Claims

0Family size

Assignee

Moeller GmbH · DE

Inventors

Volker Lang · Gauting, DE
Rudolf Scholz · Sankt Augustin, DE

Key dates

Filing date	Apr 4, 2003
Grant date	May 4, 2004
Priority date	—
Expiry date	Apr 4, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH01F7/1607
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A DC electromagnet system used in an electrical switchgear, for example in a contactor having a driving coil, includes a fixed, C-shaped magnet yoke and a movable, rod-shaped armature. The yoke has a central web and two legs. The armature is guided in its displacement stroke by guide devices, the free end of the armature being directed toward the central web of the magnet yoke. There is a single working air gap between the free end of the armature and the center of the central web, perpendicular to the longitudinal axis of the armature. The ends of the yoke legs extend to the proximity of the armature and are separated from the armature, each forming a parasitic air gap.

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