Patent · US Active

Method for determining contact erosion of an electromagnetic switching device, and electromagnetic switching device comprising a mechanism operating according to said method

US8688391B2 · kind B2 · utility

4Cited by

1References

23Claims

0Family size

Assignee

Siemens Aktiengelleschaft · DE

Inventors

Norbert B. Elsner · Village of La Jolla, US
Norbert Mitlmeier · Ursensollen, DE
Bernd Trautmann · Erlangen, DE

Key dates

Filing date	Sep 8, 2006
Grant date	Apr 1, 2014
Priority date	—
Expiry date	Sep 12, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2071/044
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In order to determine contact erosion of an electromagnetic switching device, a mechanical parameter is measured which characterizes the time course of the relative movement between the contacts, said movement being caused by an actuator. The point in time when the contacts close is determined by evaluating the time course of the relative movement, and the distance traveled by the contact/s until said point in time or the distance traveled by the actuator from said point in time until reaching the final position thereof is detected at least indirectly and is compared to a stored reference value.

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