Patent · US Expired

Method and apparatus for triggering an electromagnetic consumer

US5711280A · kind A · utility

8Cited by

10References

7Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Ralf Foerster · Regensburg, DE
Hartmut Gerken · Nittendorf, DE
Manfred Weigl · Viehhausen, DE

Key dates

Filing date	Sep 9, 1996
Grant date	Jan 27, 1998
Priority date	—
Expiry date	Sep 9, 2016

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2041/2075
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for triggering an electromagnetic consumer with low coil resistance (solenoid for a Diesel injection pump) having a free-running circuit that can be switched over, and an apparatus for performing the method, regulate a voltage at an end stage to a predetermined value. This is accomplished by controlling the control voltage of the end stage during a turn-on phase until a turn-on peak current is reached and then regulating the holding current by repeatedly lowering the current through the end stage and keeping it constant to a predetermined value during a predetermined time period and then raising it again to a maximum value of the holding current until the consumer is turned off.

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