Patent · US Expired

Method of reducing the impact speed of an armature in an electromagnetic actuator

US5917692A · kind A · utility

67Cited by

5References

20Claims

0Family size

Assignee

FEV Motorentechnik GmbH & Co. Kommanitgesellschaft · DE

Inventors

Guenter Schmitz · Oldenburg, DE
Martin Pischinger · Aachen, DE
Thomas Goebel · Wolfsberg, AT
Michael Schebitz · Attendorn, DE
Ekkehard Schrey · Aachen, DE

Key dates

Filing date	Aug 12, 1996
Grant date	Jun 29, 1999
Priority date	—
Expiry date	Aug 12, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method is provided for reducing an impact speed of an armature on a pole face of an electromagnet in an electro-magnetic actuator, in which the armature moves toward the pole face against a restoring spring force when the coil of the electromagnet is charged with current. The method includes limiting a voltage applied to the coil to a predeterminable maximum value as the armature approaches the pole face so that a current flowing through the coil drops for a portion of the time of the voltage limitation.

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