Patent · US Expired

Method for operating an electromagnetic switching device and electromagnetic switching device

US6927959B2 · kind B2 · utility

0Cited by

10References

20Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Reinhard Herbst · Wernberg-Köblitz, DE
Norbert Mitlmeier · Ursensollen, DE

Key dates

Filing date	May 30, 2001
Grant date	Aug 9, 2005
Priority date	—
Expiry date	Jun 9, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2009/566
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Switching contacts of a switching device are provided to ensure optimum service life. An optimum switching point, in terms of the load of one of the switching contacts, is determined depending on a current path that is measured during the switching process and the switching point is shifted by a delay time from switching operation to switching operation. The optimal switching point is preferably determined by self-calibration of the switching device.

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